diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 17:25:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 17:25:38 -0700 |
| commit | e404f91ed2180dfecbab15dd4d39c543353385fb (patch) | |
| tree | c256e29b1c738d5e5b5478f19b369b1fd90bd1e2 | |
| parent | 18a043f9413277523cf5011e594caa1747db4948 (diff) | |
| parent | e18105c128734b1671739ad4d85e216ebec28c61 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: convert a BUG_ON to BUILD_BUG_ON
arch/tile: make ptrace() work properly for TILE-Gx COMPAT mode
arch/tile: support new info op generated by compiler
arch/tile: minor whitespace/naming changes for string support files
arch/tile: enable single-step support for TILE-Gx
arch/tile: parameterize system PLs to support KVM port
arch/tile: add Tilera's <arch/sim.h> header as an open-source header
arch/tile: Bomb C99 comments to C89 comments in tile's <arch/sim_def.h>
arch/tile: prevent corrupt top frame from causing backtracer runaway
arch/tile: various top-level Makefile cleanups
arch/tile: change lower bound on syscall error return to -4095
arch/tile: properly export __mb_incoherent for modules
arch/tile: provide a definition of MAP_STACK
kmemleak: add TILE to the list of supported architectures.
char: hvc: check for error case
arch/tile: Add a warning if we try to allocate too much vmalloc memory.
arch/tile: update some comments to clarify register usage.
arch/tile: use better "punctuation" for VMSPLIT_3_5G and friends
arch/tile: Use <asm-generic/syscalls.h>
tile: replace some BUG_ON checks with BUILD_BUG_ON checks
48 files changed, 1612 insertions, 735 deletions
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index 1eb308cb711..89cfee07efa 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -96,6 +96,7 @@ config HVC_TILE config TILE def_bool y + select HAVE_KVM if !TILEGX select GENERIC_FIND_FIRST_BIT select GENERIC_FIND_NEXT_BIT select USE_GENERIC_SMP_HELPERS @@ -236,9 +237,9 @@ choice If you are not absolutely sure what you are doing, leave this option alone! - config VMSPLIT_375G + config VMSPLIT_3_75G bool "3.75G/0.25G user/kernel split (no kernel networking)" - config VMSPLIT_35G + config VMSPLIT_3_5G bool "3.5G/0.5G user/kernel split" config VMSPLIT_3G bool "3G/1G user/kernel split" @@ -252,8 +253,8 @@ endchoice config PAGE_OFFSET hex - default 0xF0000000 if VMSPLIT_375G - default 0xE0000000 if VMSPLIT_35G + default 0xF0000000 if VMSPLIT_3_75G + default 0xE0000000 if VMSPLIT_3_5G default 0xB0000000 if VMSPLIT_3G_OPT default 0x80000000 if VMSPLIT_2G default 0x40000000 if VMSPLIT_1G @@ -314,6 +315,15 @@ config HARDWALL bool "Hardwall support to allow access to user dynamic network" default y +config KERNEL_PL + int "Processor protection level for kernel" + range 1 2 + default "1" + ---help--- + This setting determines the processor protection level the + kernel will be built to run at. Generally you should use + the default value here. + endmenu # Tilera-specific configuration menu "Bus options" @@ -354,3 +364,5 @@ source "security/Kconfig" source "crypto/Kconfig" source "lib/Kconfig" + +source "arch/tile/kvm/Kconfig" diff --git a/arch/tile/Makefile b/arch/tile/Makefile index fd8f6bb5fac..17acce70569 100644 --- a/arch/tile/Makefile +++ b/arch/tile/Makefile @@ -26,8 +26,9 @@ $(error Set TILERA_ROOT or CROSS_COMPILE when building $(ARCH) on $(HOST_ARCH)) endif endif - +ifneq ($(CONFIG_DEBUG_EXTRA_FLAGS),"") KBUILD_CFLAGS += $(CONFIG_DEBUG_EXTRA_FLAGS) +endif LIBGCC_PATH := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name) @@ -49,6 +50,20 @@ head-y := arch/tile/kernel/head_$(BITS).o libs-y += arch/tile/lib/ libs-y += $(LIBGCC_PATH) - # See arch/tile/Kbuild for content of core part of the kernel core-y += arch/tile/ + +core-$(CONFIG_KVM) += arch/tile/kvm/ + +ifdef TILERA_ROOT +INSTALL_PATH ?= $(TILERA_ROOT)/tile/boot +endif + +install: + install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) + install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) + install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) + +define archhelp + echo ' install - install kernel into $(INSTALL_PATH)' +endef diff --git a/arch/tile/include/arch/sim.h b/arch/tile/include/arch/sim.h new file mode 100644 index 00000000000..74b7c1624d3 --- /dev/null +++ b/arch/tile/include/arch/sim.h @@ -0,0 +1,619 @@ +/* + * Copyright 2010 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/** + * @file + * + * Provides an API for controlling the simulator at runtime. + */ + +/** + * @addtogroup arch_sim + * @{ + * + * An API for controlling the simulator at runtime. + * + * The simulator's behavior can be modified while it is running. + * For example, human-readable trace output can be enabled and disabled + * around code of interest. + * + * There are two ways to modify simulator behavior: + * programmatically, by calling various sim_* functions, and + * interactively, by entering commands like "sim set functional true" + * at the tile-monitor prompt. Typing "sim help" at that prompt provides + * a list of interactive commands. + * + * All interactive commands can also be executed programmatically by + * passing a string to the sim_command function. + */ + +#ifndef __ARCH_SIM_H__ +#define __ARCH_SIM_H__ + +#include <arch/sim_def.h> +#include <arch/abi.h> + +#ifndef __ASSEMBLER__ + +#include <arch/spr_def.h> + + +/** + * Return true if the current program is running under a simulator, + * rather than on real hardware. If running on hardware, other "sim_xxx()" + * calls have no useful effect. + */ +static inline int +sim_is_simulator(void) +{ + return __insn_mfspr(SPR_SIM_CONTROL) != 0; +} + + +/** + * Checkpoint the simulator state to a checkpoint file. + * + * The checkpoint file name is either the default or the name specified + * on the command line with "--checkpoint-file". + */ +static __inline void +sim_checkpoint(void) +{ + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_CHECKPOINT); +} + + +/** + * Report whether or not various kinds of simulator tracing are enabled. + * + * @return The bitwise OR of these values: + * + * SIM_TRACE_CYCLES (--trace-cycles), + * SIM_TRACE_ROUTER (--trace-router), + * SIM_TRACE_REGISTER_WRITES (--trace-register-writes), + * SIM_TRACE_DISASM (--trace-disasm), + * SIM_TRACE_STALL_INFO (--trace-stall-info) + * SIM_TRACE_MEMORY_CONTROLLER (--trace-memory-controller) + * SIM_TRACE_L2_CACHE (--trace-l2) + * SIM_TRACE_LINES (--trace-lines) + */ +static __inline unsigned int +sim_get_tracing(void) +{ + return __insn_mfspr(SPR_SIM_CONTROL) & SIM_TRACE_FLAG_MASK; +} + + +/** + * Turn on or off different kinds of simulator tracing. + * + * @param mask Either one of these special values: + * + * SIM_TRACE_NONE (turns off tracing), + * SIM_TRACE_ALL (turns on all possible tracing). + * + * or the bitwise OR of these values: + * + * SIM_TRACE_CYCLES (--trace-cycles), + * SIM_TRACE_ROUTER (--trace-router), + * SIM_TRACE_REGISTER_WRITES (--trace-register-writes), + * SIM_TRACE_DISASM (--trace-disasm), + * SIM_TRACE_STALL_INFO (--trace-stall-info) + * SIM_TRACE_MEMORY_CONTROLLER (--trace-memory-controller) + * SIM_TRACE_L2_CACHE (--trace-l2) + * SIM_TRACE_LINES (--trace-lines) + */ +static __inline void +sim_set_tracing(unsigned int mask) +{ + __insn_mtspr(SPR_SIM_CONTROL, SIM_TRACE_SPR_ARG(mask)); +} + + +/** + * Request dumping of different kinds of simulator state. + * + * @param mask Either this special value: + * + * SIM_DUMP_ALL (dump all known state) + * + * or the bitwise OR of these values: + * + * SIM_DUMP_REGS (the register file), + * SIM_DUMP_SPRS (the SPRs), + * SIM_DUMP_ITLB (the iTLB), + * SIM_DUMP_DTLB (the dTLB), + * SIM_DUMP_L1I (the L1 I-cache), + * SIM_DUMP_L1D (the L1 D-cache), + * SIM_DUMP_L2 (the L2 cache), + * SIM_DUMP_SNREGS (the switch register file), + * SIM_DUMP_SNITLB (the switch iTLB), + * SIM_DUMP_SNL1I (the switch L1 I-cache), + * SIM_DUMP_BACKTRACE (the current backtrace) + */ +static __inline void +sim_dump(unsigned int mask) +{ + __insn_mtspr(SPR_SIM_CONTROL, SIM_DUMP_SPR_ARG(mask)); +} + + +/** + * Print a string to the simulator stdout. + * + * @param str The string to be written; a newline is automatically added. + */ +static __inline void +sim_print_string(const char* str) +{ + int i; + for (i = 0; str[i] != 0; i++) + { + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_PUTC | + (str[i] << _SIM_CONTROL_OPERATOR_BITS)); + } + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_PUTC | + (SIM_PUTC_FLUSH_STRING << _SIM_CONTROL_OPERATOR_BITS)); +} + + +/** + * Execute a simulator command string. + * + * Type 'sim help' at the tile-monitor prompt to learn what commands + * are available. Note the use of the tile-monitor "sim" command to + * pass commands to the simulator. + * + * The argument to sim_command() does not include the leading "sim" + * prefix used at the tile-monitor prompt; for example, you might call + * sim_command("trace disasm"). + */ +static __inline void +sim_command(const char* str) +{ + int c; + do + { + c = *str++; + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_COMMAND | + (c << _SIM_CONTROL_OPERATOR_BITS)); + } + while (c); +} + + + +#ifndef __DOXYGEN__ + +/** + * The underlying implementation of "_sim_syscall()". + * + * We use extra "and" instructions to ensure that all the values + * we are passing to the simulator are actually valid in the registers + * (i.e. returned from memory) prior to the SIM_CONTROL spr. + */ +static __inline int _sim_syscall0(int val) +{ + long result; + __asm__ __volatile__ ("mtspr SIM_CONTROL, r0" + : "=R00" (result) : "R00" (val)); + return result; +} + +static __inline int _sim_syscall1(int val, long arg1) +{ + long result; + __asm__ __volatile__ ("{ and zero, r1, r1; mtspr SIM_CONTROL, r0 }" + : "=R00" (result) : "R00" (val), "R01" (arg1)); + return result; +} + +static __inline int _sim_syscall2(int val, long arg1, long arg2) +{ + long result; + __asm__ __volatile__ ("{ and zero, r1, r2; mtspr SIM_CONTROL, r0 }" + : "=R00" (result) + : "R00" (val), "R01" (arg1), "R02" (arg2)); + return result; +} + +/* Note that _sim_syscall3() and higher are technically at risk of + receiving an interrupt right before the mtspr bundle, in which case + the register values for arguments 3 and up may still be in flight + to the core from a stack frame reload. */ + +static __inline int _sim_syscall3(int val, long arg1, long arg2, long arg3) +{ + long result; + __asm__ __volatile__ ("{ and zero, r3, r3 };" + "{ and zero, r1, r2; mtspr SIM_CONTROL, r0 }" + : "=R00" (result) + : "R00" (val), "R01" (arg1), "R02" (arg2), + "R03" (arg3)); + return result; +} + +static __inline int _sim_syscall4(int val, long arg1, long arg2, long arg3, + long arg4) +{ + long result; + __asm__ __volatile__ ("{ and zero, r3, r4 };" + "{ and zero, r1, r2; mtspr SIM_CONTROL, r0 }" + : "=R00" (result) + : "R00" (val), "R01" (arg1), "R02" (arg2), + "R03" (arg3), "R04" (arg4)); + return result; +} + +static __inline int _sim_syscall5(int val, long arg1, long arg2, long arg3, + long arg4, long arg5) +{ + long result; + __asm__ __volatile__ ("{ and zero, r3, r4; and zero, r5, r5 };" + "{ and zero, r1, r2; mtspr SIM_CONTROL, r0 }" + : "=R00" (result) + : "R00" (val), "R01" (arg1), "R02" (arg2), + "R03" (arg3), "R04" (arg4), "R05" (arg5)); + return result; +} + + +/** + * Make a special syscall to the simulator itself, if running under + * simulation. This is used as the implementation of other functions + * and should not be used outside this file. + * + * @param syscall_num The simulator syscall number. + * @param nr The number of additional arguments provided. + * + * @return Varies by syscall. + */ +#define _sim_syscall(syscall_num, nr, args...) \ + _sim_syscall##nr( \ + ((syscall_num) << _SIM_CONTROL_OPERATOR_BITS) | SIM_CONTROL_SYSCALL, args) + + +/* Values for the "access_mask" parameters below. */ +#define SIM_WATCHPOINT_READ 1 +#define SIM_WATCHPOINT_WRITE 2 +#define SIM_WATCHPOINT_EXECUTE 4 + + +static __inline int +sim_add_watchpoint(unsigned int process_id, + unsigned long address, + unsigned long size, + unsigned int access_mask, + unsigned long user_data) +{ + return _sim_syscall(SIM_SYSCALL_ADD_WATCHPOINT, 5, process_id, + address, size, access_mask, user_data); +} + + +static __inline int +sim_remove_watchpoint(unsigned int process_id, + unsigned long address, + unsigned long size, + unsigned int access_mask, + unsigned long user_data) +{ + return _sim_syscall(SIM_SYSCALL_REMOVE_WATCHPOINT, 5, process_id, + address, size, access_mask, user_data); +} + + +/** + * Return value from sim_query_watchpoint. + */ +struct SimQueryWatchpointStatus +{ + /** + * 0 if a watchpoint fired, 1 if no watchpoint fired, or -1 for + * error (meaning a bad process_id). + */ + int syscall_status; + + /** + * The address of the watchpoint that fired (this is the address + * passed to sim_add_watchpoint, not an address within that range + * that actually triggered the watchpoint). + */ + unsigned long address; + + /** The arbitrary user_data installed by sim_add_watchpoint. */ + unsigned long user_data; +}; + + +static __inline struct SimQueryWatchpointStatus +sim_query_watchpoint(unsigned int process_id) +{ + struct SimQueryWatchpointStatus status; + long val = SIM_CONTROL_SYSCALL | + (SIM_SYSCALL_QUERY_WATCHPOINT << _SIM_CONTROL_OPERATOR_BITS); + __asm__ __volatile__ ("{ and zero, r1, r1; mtspr SIM_CONTROL, r0 }" + : "=R00" (status.syscall_status), + "=R01" (status.address), + "=R02" (status.user_data) + : "R00" (val), "R01" (process_id)); + return status; +} + + +/* On the simulator, confirm lines have been evicted everywhere. */ +static __inline void +sim_validate_lines_evicted(unsigned long long pa, unsigned long length) +{ +#ifdef __LP64__ + _sim_syscall(SIM_SYSCALL_VALIDATE_LINES_EVICTED, 2, pa, length); +#else + _sim_syscall(SIM_SYSCALL_VALIDATE_LINES_EVICTED, 4, + 0 /* dummy */, (long)(pa), (long)(pa >> 32), length); +#endif +} + + +#endif /* !__DOXYGEN__ */ + + + + +/** + * Modify the shaping parameters of a shim. + * + * @param shim The shim to modify. One of: + * SIM_CONTROL_SHAPING_GBE_0 + * SIM_CONTROL_SHAPING_GBE_1 + * SIM_CONTROL_SHAPING_GBE_2 + * SIM_CONTROL_SHAPING_GBE_3 + * SIM_CONTROL_SHAPING_XGBE_0 + * SIM_CONTROL_SHAPING_XGBE_1 + * + * @param type The type of shaping. This should be the same type of + * shaping that is already in place on the shim. One of: + * SIM_CONTROL_SHAPING_MULTIPLIER + * SIM_CONTROL_SHAPING_PPS + * SIM_CONTROL_SHAPING_BPS + * + * @param units The magnitude of the rate. One of: + * SIM_CONTROL_SHAPING_UNITS_SINGLE + * SIM_CONTROL_SHAPING_UNITS_KILO + * SIM_CONTROL_SHAPING_UNITS_MEGA + * SIM_CONTROL_SHAPING_UNITS_GIGA + * + * @param rate The rate to which to change it. This must fit in + * SIM_CONTROL_SHAPING_RATE_BITS bits or a warning is issued and + * the shaping is not changed. + * + * @return 0 if no problems were detected in the arguments to sim_set_shaping + * or 1 if problems were detected (for example, rate does not fit in 17 bits). + */ +static __inline int +sim_set_shaping(unsigned shim, + unsigned type, + unsigned units, + unsigned rate) +{ + if ((rate & ~((1 << SIM_CONTROL_SHAPING_RATE_BITS) - 1)) != 0) + return 1; + + __insn_mtspr(SPR_SIM_CONTROL, SIM_SHAPING_SPR_ARG(shim, type, units, rate)); + return 0; +} + +#ifdef __tilegx__ + +/** Enable a set of mPIPE links. Pass a -1 link_mask to enable all links. */ +static __inline void +sim_enable_mpipe_links(unsigned mpipe, unsigned long link_mask) +{ + __insn_mtspr(SPR_SIM_CONTROL, + (SIM_CONTROL_ENABLE_MPIPE_LINK_MAGIC_BYTE | + (mpipe << 8) | (1 << 16) | ((uint_reg_t)link_mask << 32))); +} + +/** Disable a set of mPIPE links. Pass a -1 link_mask to disable all links. */ +static __inline void +sim_disable_mpipe_links(unsigned mpipe, unsigned long link_mask) +{ + __insn_mtspr(SPR_SIM_CONTROL, + (SIM_CONTROL_ENABLE_MPIPE_LINK_MAGIC_BYTE | + (mpipe << 8) | (0 << 16) | ((uint_reg_t)link_mask << 32))); +} + +#endif /* __tilegx__ */ + + +/* + * An API for changing "functional" mode. + */ + +#ifndef __DOXYGEN__ + +#define sim_enable_functional() \ + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_ENABLE_FUNCTIONAL) + +#define sim_disable_functional() \ + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_DISABLE_FUNCTIONAL) + +#endif /* __DOXYGEN__ */ + + +/* + * Profiler support. + */ + +/** + * Turn profiling on for the current task. + * + * Note that this has no effect if run in an environment without + * profiling support (thus, the proper flags to the simulator must + * be supplied). + */ +static __inline void +sim_profiler_enable(void) +{ + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_PROFILER_ENABLE); +} + + +/** Turn profiling off for the current task. */ +static __inline void +sim_profiler_disable(void) +{ + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_PROFILER_DISABLE); +} + + +/** + * Turn profiling on or off for the current task. + * + * @param enabled If true, turns on profiling. If false, turns it off. + * + * Note that this has no effect if run in an environment without + * profiling support (thus, the proper flags to the simulator must + * be supplied). + */ +static __inline void +sim_profiler_set_enabled(int enabled) +{ + int val = + enabled ? SIM_CONTROL_PROFILER_ENABLE : SIM_CONTROL_PROFILER_DISABLE; + __insn_mtspr(SPR_SIM_CONTROL, val); +} + + +/** + * Return true if and only if profiling is currently enabled + * for the current task. + * + * This returns false even if sim_profiler_enable() was called + * if the current execution environment does not support profiling. + */ +static __inline int +sim_profiler_is_enabled(void) +{ + return ((__insn_mfspr(SPR_SIM_CONTROL) & SIM_PROFILER_ENABLED_MASK) != 0); +} + + +/** + * Reset profiling counters to zero for the current task. + * + * Resetting can be done while profiling is enabled. It does not affect + * the chip-wide profiling counters. + */ +static __inline void +sim_profiler_clear(void) +{ + __insn_mtspr(SPR_SIM_CONTROL, SIM_CONTROL_PROFILER_CLEAR); +} + + +/** + * Enable specified chip-level profiling counters. + * + * Does not affect the per-task profiling counters. + * + * @param mask Either this special value: + * + * SIM_CHIP_ALL (enables all chip-level components). + * + * or the bitwise OR of these values: + * + * SIM_CHIP_MEMCTL (enable all memory controllers) + * SIM_CHIP_XAUI (enable all XAUI controllers) + * SIM_CHIP_MPIPE (enable all MPIPE controllers) + */ +static __inline void +sim_profiler_chip_enable(unsigned int mask) +{ + __insn_mtspr(SPR_SIM_CONTROL, SIM_PROFILER_CHIP_ENABLE_SPR_ARG(mask)); +} + + +/** + * Disable specified chip-level profiling counters. + * + * Does not affect the per-task profiling counters. + * + * @param mask Either this special value: + * + * SIM_CHIP_ALL (disables all chip-level components). + * + * or the bitwise OR of these values: + * + * SIM_CHIP_MEMCTL (disable all memory controllers) + * SIM_CHIP_XAUI (disable all XAUI controllers) + * SIM_CHIP_MPIPE (disable all MPIPE controllers) + */ +static __inline void +sim_profiler_chip_disable(unsigned int mask) +{ + __insn_mtspr(SPR_SIM_CONTROL, SIM_PROFILER_CHIP_DISABLE_SPR_ARG(mask)); +} + + +/** + * Reset specified chip-level profiling counters to zero. + * + * Does not affect the per-task profiling counters. + * + * @param mask Either this special value: + * + * SIM_CHIP_ALL (clears all chip-level components). + * + * or the bitwise OR of these values: + * + * SIM_CHIP_MEMCTL (clear all memory controllers) + * SIM_CHIP_XAUI (clear all XAUI controllers) + * SIM_CHIP_MPIPE (clear all MPIPE controllers) + */ +static __inline void +sim_profiler_chip_clear(unsigned int mask) +{ + __insn_mtspr(SPR_SIM_CONTROL, SIM_PROFILER_CHIP_CLEAR_SPR_ARG(mask)); +} + + +/* + * Event support. + */ + +#ifndef __DOXYGEN__ + +static __inline void +sim_event_begin(unsigned int x) +{ +#if defined(__tile__) && !defined(__NO_EVENT_SPR__) + __insn_mtspr(SPR_EVENT_BEGIN, x); +#endif +} + +static __inline void +sim_event_end(unsigned int x) +{ +#if defined(__tile__) && !defined(__NO_EVENT_SPR__) + __insn_mtspr(SPR_EVENT_END, x); +#endif +} + +#endif /* !__DOXYGEN__ */ + +#endif /* !__ASSEMBLER__ */ + +#endif /* !__ARCH_SIM_H__ */ + +/** @} */ diff --git a/arch/tile/include/arch/sim_def.h b/arch/tile/include/arch/sim_def.h index 6418fbde063..7a17082c377 100644 --- a/arch/tile/include/arch/sim_def.h +++ b/arch/tile/include/arch/sim_def.h @@ -1,477 +1,461 @@ -// Copyright 2010 Tilera Corporation. All Rights Reserved. -// -// This program is free software; you can redistribute it and/or -// modify it under the terms of the GNU General Public License -// as published by the Free Software Foundation, version 2. -// -// This program is distributed in the hope that it will be useful, but -// WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or -// NON INFRINGEMENT. See the GNU General Public License for -// more details. - -//! @file -//! -//! Some low-level simulator definitions. -//! +/* + * Copyright 2010 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/** + * @file + * + * Some low-level simulator definitions. + */ #ifndef __ARCH_SIM_DEF_H__ #define __ARCH_SIM_DEF_H__ -//! Internal: the low bits of the SIM_CONTROL_* SPR values specify -//! the operation to perform, and the remaining bits are -//! an operation-specific parameter (often unused). -//! +/** + * Internal: the low bits of the SIM_CONTROL_* SPR values specify + * the operation to perform, and the remaining bits are + * an operation-specific parameter (often unused). + */ #define _SIM_CONTROL_OPERATOR_BITS 8 -//== Values which can be written to SPR_SIM_CONTROL. +/* + * Values which can be written to SPR_SIM_CONTROL. + */ -//! If written to SPR_SIM_CONTROL, stops profiling. -//! +/** If written to SPR_SIM_CONTROL, stops profiling. */ #define SIM_CONTROL_PROFILER_DISABLE 0 -//! If written to SPR_SIM_CONTROL, starts profiling. -//! +/** If written to SPR_SIM_CONTROL, starts profiling. */ #define SIM_CONTROL_PROFILER_ENABLE 1 -//! If written to SPR_SIM_CONTROL, clears profiling counters. -//! +/** If written to SPR_SIM_CONTROL, clears profiling counters. */ #define SIM_CONTROL_PROFILER_CLEAR 2 -//! If written to SPR_SIM_CONTROL, checkpoints the simulator. -//! +/** If written to SPR_SIM_CONTROL, checkpoints the simulator. */ #define SIM_CONTROL_CHECKPOINT 3 -//! If written to SPR_SIM_CONTROL, combined with a mask (shifted by 8), -//! sets the tracing mask to the given mask. See "sim_set_tracing()". -//! +/** + * If written to SPR_SIM_CONTROL, combined with a mask (shifted by 8), + * sets the tracing mask to the given mask. See "sim_set_tracing()". + */ #define SIM_CONTROL_SET_TRACING 4 -//! If written to SPR_SIM_CONTROL, combined with a mask (shifted by 8), -//! dumps the requested items of machine state to the log. -//! +/** + * If written to SPR_SIM_CONTROL, combined with a mask (shifted by 8), + * dumps the requested items of machine state to the log. + */ #define SIM_CONTROL_DUMP 5 -//! If written to SPR_SIM_CONTROL, clears chip-level profiling counters. -//! +/** If written to SPR_SIM_CONTROL, clears chip-level profiling counters. */ #define SIM_CONTROL_PROFILER_CHIP_CLEAR 6 -//! If written to SPR_SIM_CONTROL, disables chip-level profiling. -//! +/** If written to SPR_SIM_CONTROL, disables chip-level profiling. */ #define SIM_CONTROL_PROFILER_CHIP_DISABLE 7 -//! If written to SPR_SIM_CONTROL, enables chip-level profiling. -//! +/** If written to SPR_SIM_CONTROL, enables chip-level profiling. */ #define SIM_CONTROL_PROFILER_CHIP_ENABLE 8 -//! If written to SPR_SIM_CONTROL, enables chip-level functional mode -//! +/** If written to SPR_SIM_CONTROL, enables chip-level functional mode */ #define SIM_CONTROL_ENABLE_FUNCTIONAL 9 -//! If written to SPR_SIM_CONTROL, disables chip-level functional mode. -//! +/** If written to SPR_SIM_CONTROL, disables chip-level functional mode. */ #define SIM_CONTROL_DISABLE_FUNCTIONAL 10 -//! If written to SPR_SIM_CONTROL, enables chip-level functional mode. -//! All tiles must perform this write for functional mode to be enabled. -//! Ignored in naked boot mode unless --functional is specified. -//! WARNING: Only the hypervisor startup code should use this! -//! +/** + * If written to SPR_SIM_CONTROL, enables chip-level functional mode. + * All tiles must perform this write for functional mode to be enabled. + * Ignored in naked boot mode unless --functional is specified. + * WARNING: Only the hypervisor startup code should use this! + */ #define SIM_CONTROL_ENABLE_FUNCTIONAL_BARRIER 11 -//! If written to SPR_SIM_CONTROL, combined with a character (shifted by 8), -//! writes a string directly to the simulator output. Written to once for -//! each character in the string, plus a final NUL. Instead of NUL, -//! you can also use "SIM_PUTC_FLUSH_STRING" or "SIM_PUTC_FLUSH_BINARY". -//! -// ISSUE: Document the meaning of "newline", and the handling of NUL. -// +/** + * If written to SPR_SIM_CONTROL, combined with a character (shifted by 8), + * writes a string directly to the simulator output. Written to once for + * each character in the string, plus a final NUL. Instead of NUL, + * you can also use "SIM_PUTC_FLUSH_STRING" or "SIM_PUTC_FLUSH_BINARY". + */ +/* ISSUE: Document the meaning of "newline", and the handling of NUL. */ #define SIM_CONTROL_PUTC 12 -//! If written to SPR_SIM_CONTROL, clears the --grind-coherence state for -//! this core. This is intended to be used before a loop that will -//! invalidate the cache by loading new data and evicting all current data. -//! Generally speaking, this API should only be used by system code. -//! +/** + * If written to SPR_SIM_CONTROL, clears the --grind-coherence state for + * this core. This is intended to be used before a loop that will + * invalidate the cache by loading new data and evicting all current data. + * Generally speaking, this API should only be used by system code. + */ #define SIM_CONTROL_GRINDER_CLEAR 13 -//! If written to SPR_SIM_CONTROL, shuts down the simulator. -//! +/** If written to SPR_SIM_CONTROL, shuts down the simulator. */ #define SIM_CONTROL_SHUTDOWN 14 -//! If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8), -//! indicates that a fork syscall just created the given process. -//! +/** + * If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8), + * indicates that a fork syscall just created the given process. + */ #define SIM_CONTROL_OS_FORK 15 -//! If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8), -//! indicates that an exit syscall was just executed by the given process. -//! +/** + * If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8), + * indicates that an exit syscall was just executed by the given process. + */ #define SIM_CONTROL_OS_EXIT 16 -//! If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8), -//! indicates that the OS just switched to the given process. -//! +/** + * If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8), + * indicates that the OS just switched to the given process. + */ #define SIM_CONTROL_OS_SWITCH 17 -//! If written to SPR_SIM_CONTROL, combined with a character (shifted by 8), -//! indicates that an exec syscall was just executed. Written to once for -//! each character in the executable name, plus a final NUL. -//! +/** + * If written to SPR_SIM_CONTROL, combined with a character (shifted by 8), + * indicates that an exec syscall was just executed. Written to once for + * each character in the executable name, plus a final NUL. + */ #define SIM_CONTROL_OS_EXEC 18 -//! If written to SPR_SIM_CONTROL, combined with a character (shifted by 8), -//! indicates that an interpreter (PT_INTERP) was loaded. Written to once -//! for each character in "ADDR:PATH", plus a final NUL, where "ADDR" is a -//! hex load address starting with "0x", and "PATH" is the executable name. -//! +/** + * If written to SPR_SIM_CONTROL, combined with a character (shifted by 8), + * indicates that an interpreter (PT_INTERP) was loaded. Written to once + * for each character in "ADDR:PATH", plus a final NUL, where "ADDR" is a + * hex load address starting with "0x", and "PATH" is the executable name. + */ #define SIM_CONTROL_OS_INTERP 19 -//! If written to SPR_SIM_CONTROL, combined with a character (shifted by 8), -//! indicates that a dll was loaded. Written to once for each character -//! in "ADDR:PATH", plus a final NUL, where "ADDR" is a hexadecimal load -//! address starting with "0x", and "PATH" is the executable name. -//! +/** + * If written to SPR_SIM_CONTROL, combined with a character (shifted by 8), + * indicates that a dll was loaded. Written to once for each character + * in "ADDR:PATH", plus a final NUL, where "ADDR" is a hexadecimal load + * address starting with "0x", and "PATH" is the executable name. + */ #define SIM_CONTROL_DLOPEN 20 -//! If written to SPR_SIM_CONTROL, combined with a character (shifted by 8), -//! indicates that a dll was unloaded. Written to once for each character -//! in "ADDR", plus a final NUL, where "ADDR" is a hexadecimal load -//! address starting with "0x". -//! +/** + * If written to SPR_SIM_CONTROL, combined with a character (shifted by 8), + * indicates that a dll was unloaded. Written to once for each character + * in "ADDR", plus a final NUL, where "ADDR" is a hexadecimal load + * address starting with "0x". + */ #define SIM_CONTROL_DLCLOSE 21 -//! If written to SPR_SIM_CONTROL, combined with a flag (shifted by 8), -//! indicates whether to allow data reads to remotely-cached -//! dirty cache lines to be cached locally without grinder warnings or -//! assertions (used by Linux kernel fast memcpy). -//! +/** + * If written to SPR_SIM_CONTROL, combined with a flag (shifted by 8), + * indicates whether to allow data reads to remotely-cached + * dirty cache lines to be cached locally without grinder warnings or + * assertions (used by Linux kernel fast memcpy). + */ #define SIM_CONTROL_ALLOW_MULTIPLE_CACHING 22 -//! If written to SPR_SIM_CONTROL, enables memory tracing. -//! +/** If written to SPR_SIM_CONTROL, enables memory tracing. */ #define SIM_CONTROL_ENABLE_MEM_LOGGING 23 -//! If written to SPR_SIM_CONTROL, disables memory tracing. -//! +/** If written to SPR_SIM_CONTROL, disables memory tracing. */ #define SIM_CONTROL_DISABLE_MEM_LOGGING 24 -//! If written to SPR_SIM_CONTROL, changes the shaping parameters of one of -//! the gbe or xgbe shims. Must specify the shim id, the type, the units, and -//! the rate, as defined in SIM_SHAPING_SPR_ARG. -//! +/** + * If written to SPR_SIM_CONTROL, changes the shaping parameters of one of + * the gbe or xgbe shims. Must specify the shim id, the type, the units, and + * the rate, as defined in SIM_SHAPING_SPR_ARG. + */ #define SIM_CONTROL_SHAPING 25 -//! If written to SPR_SIM_CONTROL, combined with character (shifted by 8), -//! requests that a simulator command be executed. Written to once for each -//! character in the command, plus a final NUL. -//! +/** + * If written to SPR_SIM_CONTROL, combined with character (shifted by 8), + * requests that a simulator command be executed. Written to once for each + * character in the command, plus a final NUL. + */ #define SIM_CONTROL_COMMAND 26 -//! If written to SPR_SIM_CONTROL, indicates that the simulated system -//! is panicking, to allow debugging via --debug-on-panic. -//! +/** + * If written to SPR_SIM_CONTROL, indicates that the simulated system + * is panicking, to allow debugging via --debug-on-panic. + */ #define SIM_CONTROL_PANIC 27 -//! If written to SPR_SIM_CONTROL, triggers a simulator syscall. -//! See "sim_syscall()" for more info. -//! +/** + * If written to SPR_SIM_CONTROL, triggers a simulator syscall. + * See "sim_syscall()" for more info. + */ #define SIM_CONTROL_SYSCALL 32 -//! If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8), -//! provides the pid that subsequent SIM_CONTROL_OS_FORK writes should -//! use as the pid, rather than the default previous SIM_CONTROL_OS_SWITCH. -//! +/** + * If written to SPR_SIM_CONTROL, combined with a pid (shifted by 8), + * provides the pid that subsequent SIM_CONTROL_OS_FORK writes should + * use as the pid, rather than the default previous SIM_CONTROL_OS_SWITCH. + */ #define SIM_CONTROL_OS_FORK_PARENT 33 -//! If written to SPR_SIM_CONTROL, combined with a mPIPE shim number -//! (shifted by 8), clears the pending magic data section. The cleared -//! pending magic data section and any subsequently appended magic bytes -//! will only take effect when the classifier blast programmer is run. +/** + * If written to SPR_SIM_CONTROL, combined with a mPIPE shim number + * (shifted by 8), clears the pending magic data section. The cleared + * pending magic data section and any subsequently appended magic bytes + * will only take effect when the classifier blast programmer is run. + */ #define SIM_CONTROL_CLEAR_MPIPE_MAGIC_BYTES 34 -//! If written to SPR_SIM_CONTROL, combined with a mPIPE shim number -//! (shifted by 8) and a byte of data (shifted by 16), appends that byte -//! to the shim's pending magic data section. The pending magic data -//! section takes effect when the classifier blast programmer is run. +/** + * If written to SPR_SIM_CONTROL, combined with a mPIPE shim number + * (shifted by 8) and a byte of data (shifted by 16), appends that byte + * to the shim's pending magic data section. The pending magic data + * section takes effect when the classifier blast programmer is run. + */ #define SIM_CONTROL_APPEND_MPIPE_MAGIC_BYTE 35 -//! If written to SPR_SIM_CONTROL, combined with a mPIPE shim number -//! (shifted by 8), an enable=1/disable=0 bit (shifted by 16), and a -//! mask of links (shifted by 32), enable or disable the corresponding -//! mPIPE links. +/** + * If written to SPR_SIM_CONTROL, combined with a mPIPE shim number + * (shifted by 8), an enable=1/disable=0 bit (shifted by 16), and a + * mask of links (shifted by 32), enable or disable the corresponding + * mPIPE links. + */ #define SIM_CONTROL_ENABLE_MPIPE_LINK_MAGIC_BYTE 36 -//== Syscall numbers for use with "sim_syscall()". -//! Syscall number for sim_add_watchpoint(). -//! +/* + * Syscall numbers for use with "sim_syscall()". + */ + +/** Syscall number for sim_add_watchpoint(). */ #define SIM_SYSCALL_ADD_WATCHPOINT 2 -//! Syscall number for sim_remove_watchpoint(). -//! +/** Syscall number for sim_remove_watchpoint(). */ #define SIM_SYSCALL_REMOVE_WATCHPOINT 3 -//! Syscall number for sim_query_watchpoint(). -//! +/** Syscall number for sim_query_watchpoint(). */ #define SIM_SYSCALL_QUERY_WATCHPOINT 4 -//! Syscall number that asserts that the cache lines whose 64-bit PA -//! is passed as the second argument to sim_syscall(), and over a -//! range passed as the third argument, are no longer in cache. -//! The simulator raises an error if this is not the case. -//! +/** + * Syscall number that asserts that the cache lines whose 64-bit PA + * is passed as the second argument to sim_syscall(), and over a + * range passed as the third argument, are no longer in cache. + * The simulator raises an error if this is not the case. + */ #define SIM_SYSCALL_VALIDATE_LINES_EVICTED 5 -//== Bit masks which can be shifted by 8, combined with -//== SIM_CONTROL_SET_TRACING, and written to SPR_SIM_CONTROL. +/* + * Bit masks which can be shifted by 8, combined with + * SIM_CONTROL_SET_TRACING, and written to SPR_SIM_CONTROL. + */ -//! @addtogroup arch_sim -//! @{ +/** + * @addtogroup arch_sim + * @{ + */ -//! Enable --trace-cycle when passed to simulator_set_tracing(). -//! +/** Enable --trace-cycle when passed to simulator_set_tracing(). */ #define SIM_TRACE_CYCLES 0x01 -//! Enable --trace-router when passed to simulator_set_tracing(). -//! +/** Enable --trace-router when passed to simulator_set_tracing(). */ #define SIM_TRACE_ROUTER 0x02 -//! Enable --trace-register-writes when passed to simulator_set_tracing(). -//! +/** Enable --trace-register-writes when passed to simulator_set_tracing(). */ #define SIM_TRACE_REGISTER_WRITES 0x04 -//! Enable --trace-disasm when passed to simulator_set_tracing(). -//! +/** Enable --trace-disasm when passed to simulator_set_tracing(). */ #define SIM_TRACE_DISASM 0x08 -//! Enable --trace-stall-info when passed to simulator_set_tracing(). -//! +/** Enable --trace-stall-info when passed to simulator_set_tracing(). */ #define SIM_TRACE_STALL_INFO 0x10 -//! Enable --trace-memory-controller when passed to simulator_set_tracing(). -//! +/** Enable --trace-memory-controller when passed to simulator_set_tracing(). */ #define SIM_TRACE_MEMORY_CONTROLLER 0x20 -//! Enable --trace-l2 when passed to simulator_set_tracing(). -//! +/** Enable --trace-l2 when passed to simulator_set_tracing(). */ #define SIM_TRACE_L2_CACHE 0x40 -//! Enable --trace-lines when passed to simulator_set_tracing(). -//! +/** Enable --trace-lines when passed to simulator_set_tracing(). */ #define SIM_TRACE_LINES 0x80 -//! Turn off all tracing when passed to simulator_set_tracing(). -//! +/** Turn off all tracing when passed to simulator_set_tracing(). */ #define SIM_TRACE_NONE 0 -//! Turn on all tracing when passed to simulator_set_tracing(). -//! +/** Turn on all tracing when passed to simulator_set_tracing(). */ #define SIM_TRACE_ALL (-1) -//! @} +/** @} */ -//! Computes the value to write to SPR_SIM_CONTROL to set tracing flags. -//! +/** Computes the value to write to SPR_SIM_CONTROL to set tracing flags. */ #define SIM_TRACE_SPR_ARG(mask) \ (SIM_CONTROL_SET_TRACING | ((mask) << _SIM_CONTROL_OPERATOR_BITS)) -//== Bit masks which can be shifted by 8, combined with -//== SIM_CONTROL_DUMP, and written to SPR_SIM_CONTROL. +/* + * Bit masks which can be shifted by 8, combined with + * SIM_CONTROL_DUMP, and written to SPR_SIM_CONTROL. + */ -//! @addtogroup arch_sim -//! @{ +/** + * @addtogroup arch_sim + * @{ + */ -//! Dump the general-purpose registers. -//! +/** Dump the general-purpose registers. */ #define SIM_DUMP_REGS 0x001 -//! Dump the SPRs. -//! +/** Dump the SPRs. */ #define SIM_DUMP_SPRS 0x002 -//! Dump the ITLB. -//! +/** Dump the ITLB. */ #define SIM_DUMP_ITLB 0x004 -//! Dump the DTLB. -//! +/** Dump the DTLB. */ #define SIM_DUMP_DTLB 0x008 -//! Dump the L1 I-cache. -//! +/** Dump the L1 I-cache. */ #define SIM_DUMP_L1I 0x010 -//! Dump the L1 D-cache. -//! +/** Dump the L1 D-cache. */ #define SIM_DUMP_L1D 0x020 -//! Dump the L2 cache. -//! +/** Dump the L2 cache. */ #define SIM_DUMP_L2 0x040 -//! Dump the switch registers. -//! +/** Dump the switch registers. */ #define SIM_DUMP_SNREGS 0x080 -//! Dump the switch ITLB. -//! +/** Dump the switch ITLB. */ #define SIM_DUMP_SNITLB 0x100 -//! Dump the switch L1 I-cache. -//! +/** Dump the switch L1 I-cache. */ #define SIM_DUMP_SNL1I 0x200 -//! Dump the current backtrace. -//! +/** Dump the current backtrace. */ #define SIM_DUMP_BACKTRACE 0x400 -//! Only dump valid lines in caches. -//! +/** Only dump valid lines in caches. */ #define SIM_DUMP_VALID_LINES 0x800 -//! Dump everything that is dumpable. -//! +/** Dump everything that is dumpable. */ #define SIM_DUMP_ALL (-1 & ~SIM_DUMP_VALID_LINES) -// @} +/** @} */ -//! Computes the value to write to SPR_SIM_CONTROL to dump machine state. -//! +/** Computes the value to write to SPR_SIM_CONTROL to dump machine state. */ #define SIM_DUMP_SPR_ARG(mask) \ (SIM_CONTROL_DUMP | ((mask) << _SIM_CONTROL_OPERATOR_BITS)) -//== Bit masks which can be shifted by 8, combined with -//== SIM_CONTROL_PROFILER_CHIP_xxx, and written to SPR_SIM_CONTROL. +/* + * Bit masks which can be shifted by 8, combined with + * SIM_CONTROL_PROFILER_CHIP_xxx, and written to SPR_SIM_CONTROL. + */ -//! @addtogroup arch_sim -//! @{ +/** + * @addtogroup arch_sim + * @{ + */ -//! Use with with SIM_PROFILER_CHIP_xxx to control the memory controllers. -//! +/** Use with with SIM_PROFILER_CHIP_xxx to control the memory controllers. */ #define SIM_CHIP_MEMCTL 0x001 -//! Use with with SIM_PROFILER_CHIP_xxx to control the XAUI interface. -//! +/** Use with with SIM_PROFILER_CHIP_xxx to control the XAUI interface. */ #define SIM_CHIP_XAUI 0x002 -//! Use with with SIM_PROFILER_CHIP_xxx to control the PCIe interface. -//! +/** Use with with SIM_PROFILER_CHIP_xxx to control the PCIe interface. */ #define SIM_CHIP_PCIE 0x004 -//! Use with with SIM_PROFILER_CHIP_xxx to control the MPIPE interface. -//! +/** Use with with SIM_PROFILER_CHIP_xxx to control the MPIPE interface. */ #define SIM_CHIP_MPIPE 0x008 -//! Reference all chip devices. -//! +/** Use with with SIM_PROFILER_CHIP_xxx to control the TRIO interface. */ +#define SIM_CHIP_TRIO 0x010 + +/** Reference all chip devices. */ #define SIM_CHIP_ALL (-1) -//! @} +/** @} */ -//! Computes the value to write to SPR_SIM_CONTROL to clear chip statistics. -//! +/** Computes the value to write to SPR_SIM_CONTROL to clear chip statistics. */ #define SIM_PROFILER_CHIP_CLEAR_SPR_ARG(mask) \ (SIM_CONTROL_PROFILER_CHIP_CLEAR | ((mask) << _SIM_CONTROL_OPERATOR_BITS)) -//! Computes the value to write to SPR_SIM_CONTROL to disable chip statistics. -//! +/** Computes the value to write to SPR_SIM_CONTROL to disable chip statistics.*/ #define SIM_PROFILER_CHIP_DISABLE_SPR_ARG(mask) \ (SIM_CONTROL_PROFILER_CHIP_DISABLE | ((mask) << _SIM_CONTROL_OPERATOR_BITS)) -//! Computes the value to write to SPR_SIM_CONTROL to enable chip statistics. -//! +/** Computes the value to write to SPR_SIM_CONTROL to enable chip statistics. */ #define SIM_PROFILER_CHIP_ENABLE_SPR_ARG(mask) \ (SIM_CONTROL_PROFILER_CHIP_ENABLE | ((mask) << _SIM_CONTROL_OPERATOR_BITS)) -// Shim bitrate controls. +/* Shim bitrate controls. */ -//! The number of bits used to store the shim id. -//! +/** The number of bits used to store the shim id. */ #define SIM_CONTROL_SHAPING_SHIM_ID_BITS 3 -//! @addtogroup arch_sim -//! @{ +/** + * @addtogroup arch_sim + * @{ + */ -//! Change the gbe 0 bitrate. -//! +/** Change the gbe 0 bitrate. */ #define SIM_CONTROL_SHAPING_GBE_0 0x0 -//! Change the gbe 1 bitrate. -//! +/** Change the gbe 1 bitrate. */ #define SIM_CONTROL_SHAPING_GBE_1 0x1 -//! Change the gbe 2 bitrate. -//! +/** Change the gbe 2 bitrate. */ #define SIM_CONTROL_SHAPING_GBE_2 0x2 -//! Change the gbe 3 bitrate. -//! +/** Change the gbe 3 bitrate. */ #define SIM_CONTROL_SHAPING_GBE_3 0x3 -//! Change the xgbe 0 bitrate. -//! +/** Change the xgbe 0 bitrate. */ #define SIM_CONTROL_SHAPING_XGBE_0 0x4 -//! Change the xgbe 1 bitrate. -//! +/** Change the xgbe 1 bitrate. */ #define SIM_CONTROL_SHAPING_XGBE_1 0x5 -//! The type of shaping to do. -//! +/** The type of shaping to do. */ #define SIM_CONTROL_SHAPING_TYPE_BITS 2 -//! Control the multiplier. -//! +/** Control the multiplier. */ #define SIM_CONTROL_SHAPING_MULTIPLIER 0 -//! Control the PPS. -//! +/** Control the PPS. */ #define SIM_CONTROL_SHAPING_PPS 1 -//! Control the BPS. -//! +/** Control the BPS. */ #define SIM_CONTROL_SHAPING_BPS 2 -//! The number of bits for the units for the shaping parameter. -//! +/** The number of bits for the units for the shaping parameter. */ #define SIM_CONTROL_SHAPING_UNITS_BITS 2 -//! Provide a number in single units. -//! +/** Provide a number in single units. */ #define SIM_CONTROL_SHAPING_UNITS_SINGLE 0 -//! Provide a number in kilo units. -//! +/** Provide a number in kilo units. */ #define SIM_CONTROL_SHAPING_UNITS_KILO 1 -//! Provide a number in mega units. -//! +/** Provide a number in mega units. */ #define SIM_CONTROL_SHAPING_UNITS_MEGA 2 -//! Provide a number in giga units. -//! +/** Provide a number in giga units. */ #define SIM_CONTROL_SHAPING_UNITS_GIGA 3 -// @} +/** @} */ -//! How many bits are available for the rate. -//! +/** How many bits are available for the rate. */ #define SIM_CONTROL_SHAPING_RATE_BITS \ (32 - (_SIM_CONTROL_OPERATOR_BITS + \ SIM_CONTROL_SHAPING_SHIM_ID_BITS + \ SIM_CONTROL_SHAPING_TYPE_BITS + \ SIM_CONTROL_SHAPING_UNITS_BITS)) -//! Computes the value to write to SPR_SIM_CONTROL to change a bitrate. -//! +/** Computes the value to write to SPR_SIM_CONTROL to change a bitrate. */ #define SIM_SHAPING_SPR_ARG(shim, type, units, rate) \ (SIM_CONTROL_SHAPING | \ ((shim) | \ @@ -483,30 +467,36 @@ SIM_CONTROL_SHAPING_UNITS_BITS))) << _SIM_CONTROL_OPERATOR_BITS) -//== Values returned when reading SPR_SIM_CONTROL. -// ISSUE: These names should share a longer common prefix. +/* + * Values returned when reading SPR_SIM_CONTROL. + * ISSUE: These names should share a longer common prefix. + */ -//! When reading SPR_SIM_CONTROL, the mask of simulator tracing bits -//! (SIM_TRACE_xxx values). -//! +/** + * When reading SPR_SIM_CONTROL, the mask of simulator tracing bits + * (SIM_TRACE_xxx values). + */ #define SIM_TRACE_FLAG_MASK 0xFFFF -//! When reading SPR_SIM_CONTROL, the mask for whether profiling is enabled. -//! +/** When reading SPR_SIM_CONTROL, the mask for whether profiling is enabled. */ #define SIM_PROFILER_ENABLED_MASK 0x10000 -//== Special arguments for "SIM_CONTROL_PUTC". +/* + * Special arguments for "SIM_CONTROL_PUTC". + */ -//! Flag value for forcing a PUTC string-flush, including -//! coordinate/cycle prefix and newline. -//! +/** + * Flag value for forcing a PUTC string-flush, including + * coordinate/cycle prefix and newline. + */ #define SIM_PUTC_FLUSH_STRING 0x100 -//! Flag value for forcing a PUTC binary-data-flush, which skips the -//! prefix and does not append a newline. -//! +/** + * Flag value for forcing a PUTC binary-data-flush, which skips the + * prefix and does not append a newline. + */ #define SIM_PUTC_FLUSH_BINARY 0x101 -#endif //__ARCH_SIM_DEF_H__ +#endif /* __ARCH_SIM_DEF_H__ */ diff --git a/arch/tile/include/arch/spr_def.h b/arch/tile/include/arch/spr_def.h index c8fdbd9a45e..442fcba0d12 100644 --- a/arch/tile/include/arch/spr_def.h +++ b/arch/tile/include/arch/spr_def.h @@ -12,8 +12,93 @@ * more details. */ +/* + * In addition to including the proper base SPR definition file, depending + * on machine architecture, this file defines several macros which allow + * kernel code to use protection-level dependent SPRs without worrying + * about which PL it's running at. In these macros, the PL that the SPR + * or interrupt number applies to is replaced by K. + */ + +#if CONFIG_KERNEL_PL != 1 && CONFIG_KERNEL_PL != 2 +#error CONFIG_KERNEL_PL must be 1 or 2 +#endif + +/* Concatenate 4 strings. */ +#define __concat4(a, b, c, d) a ## b ## c ## d +#define _concat4(a, b, c, d) __concat4(a, b, c, d) + #ifdef __tilegx__ #include <arch/spr_def_64.h> + +/* TILE-Gx dependent, protection-level dependent SPRs. */ + +#define SPR_INTERRUPT_MASK_K \ + _concat4(SPR_INTERRUPT_MASK_, CONFIG_KERNEL_PL,,) +#define SPR_INTERRUPT_MASK_SET_K \ + _concat4(SPR_INTERRUPT_MASK_SET_, CONFIG_KERNEL_PL,,) +#define SPR_INTERRUPT_MASK_RESET_K \ + _concat4(SPR_INTERRUPT_MASK_RESET_, CONFIG_KERNEL_PL,,) +#define SPR_INTERRUPT_VECTOR_BASE_K \ + _concat4(SPR_INTERRUPT_VECTOR_BASE_, CONFIG_KERNEL_PL,,) + +#define SPR_IPI_MASK_K \ + _concat4(SPR_IPI_MASK_, CONFIG_KERNEL_PL,,) +#define SPR_IPI_MASK_RESET_K \ + _concat4(SPR_IPI_MASK_RESET_, CONFIG_KERNEL_PL,,) +#define SPR_IPI_MASK_SET_K \ + _concat4(SPR_IPI_MASK_SET_, CONFIG_KERNEL_PL,,) +#define SPR_IPI_EVENT_K \ + _concat4(SPR_IPI_EVENT_, CONFIG_KERNEL_PL,,) +#define SPR_IPI_EVENT_RESET_K \ + _concat4(SPR_IPI_EVENT_RESET_, CONFIG_KERNEL_PL,,) +#define SPR_IPI_MASK_SET_K \ + _concat4(SPR_IPI_MASK_SET_, CONFIG_KERNEL_PL,,) +#define INT_IPI_K \ + _concat4(INT_IPI_, CONFIG_KERNEL_PL,,) + +#define SPR_SINGLE_STEP_CONTROL_K \ + _concat4(SPR_SINGLE_STEP_CONTROL_, CONFIG_KERNEL_PL,,) +#define SPR_SINGLE_STEP_EN_K_K \ + _concat4(SPR_SINGLE_STEP_EN_, CONFIG_KERNEL_PL, _, CONFIG_KERNEL_PL) +#define INT_SINGLE_STEP_K \ + _concat4(INT_SINGLE_STEP_, CONFIG_KERNEL_PL,,) + #else #include <arch/spr_def_32.h> + +/* TILEPro dependent, protection-level dependent SPRs. */ + +#define SPR_INTERRUPT_MASK_K_0 \ + _concat4(SPR_INTERRUPT_MASK_, CONFIG_KERNEL_PL, _0,) +#define SPR_INTERRUPT_MASK_K_1 \ + _concat4(SPR_INTERRUPT_MASK_, CONFIG_KERNEL_PL, _1,) +#define SPR_INTERRUPT_MASK_SET_K_0 \ + _concat4(SPR_INTERRUPT_MASK_SET_, CONFIG_KERNEL_PL, _0,) +#define SPR_INTERRUPT_MASK_SET_K_1 \ + _concat4(SPR_INTERRUPT_MASK_SET_, CONFIG_KERNEL_PL, _1,) +#define SPR_INTERRUPT_MASK_RESET_K_0 \ + _concat4(SPR_INTERRUPT_MASK_RESET_, CONFIG_KERNEL_PL, _0,) +#define SPR_INTERRUPT_MASK_RESET_K_1 \ + _concat4(SPR_INTERRUPT_MASK_RESET_, CONFIG_KERNEL_PL, _1,) + #endif + +/* Generic protection-level dependent SPRs. */ + +#define SPR_SYSTEM_SAVE_K_0 \ + _concat4(SPR_SYSTEM_SAVE_, CONFIG_KERNEL_PL, _0,) +#define SPR_SYSTEM_SAVE_K_1 \ + _concat4(SPR_SYSTEM_SAVE_, CONFIG_KERNEL_PL, _1,) +#define SPR_SYSTEM_SAVE_K_2 \ + _concat4(SPR_SYSTEM_SAVE_, CONFIG_KERNEL_PL, _2,) +#define SPR_SYSTEM_SAVE_K_3 \ + _concat4(SPR_SYSTEM_SAVE_, CONFIG_KERNEL_PL, _3,) +#define SPR_EX_CONTEXT_K_0 \ + _concat4(SPR_EX_CONTEXT_, CONFIG_KERNEL_PL, _0,) +#define SPR_EX_CONTEXT_K_1 \ + _concat4(SPR_EX_CONTEXT_, CONFIG_KERNEL_PL, _1,) +#define SPR_INTCTRL_K_STATUS \ + _concat4(SPR_INTCTRL_, CONFIG_KERNEL_PL, _STATUS,) +#define INT_INTCTRL_K \ + _concat4(INT_INTCTRL_, CONFIG_KERNEL_PL,,) diff --git a/arch/tile/include/arch/spr_def_32.h b/arch/tile/include/arch/spr_def_32.h index b4fc06864df..bbc1f4c924e 100644 --- a/arch/tile/include/arch/spr_def_32.h +++ b/arch/tile/include/arch/spr_def_32.h @@ -56,58 +56,93 @@ #define SPR_EX_CONTEXT_1_1__ICS_SHIFT 2 #define SPR_EX_CONTEXT_1_1__ICS_RMASK 0x1 #define SPR_EX_CONTEXT_1_1__ICS_MASK 0x4 +#define SPR_EX_CONTEXT_2_0 0x4605 +#define SPR_EX_CONTEXT_2_1 0x4606 +#define SPR_EX_CONTEXT_2_1__PL_SHIFT 0 +#define SPR_EX_CONTEXT_2_1__PL_RMASK 0x3 +#define SPR_EX_CONTEXT_2_1__PL_MASK 0x3 +#define SPR_EX_CONTEXT_2_1__ICS_SHIFT 2 +#define SPR_EX_CONTEXT_2_1__ICS_RMASK 0x1 +#define SPR_EX_CONTEXT_2_1__ICS_MASK 0x4 #define SPR_FAIL 0x4e09 #define SPR_INTCTRL_0_STATUS 0x4a07 #define SPR_INTCTRL_1_STATUS 0x4807 +#define SPR_INTCTRL_2_STATUS 0x4607 #define SPR_INTERRUPT_CRITICAL_SECTION 0x4e0a #define SPR_INTERRUPT_MASK_0_0 0x4a08 #define SPR_INTERRUPT_MASK_0_1 0x4a09 #define SPR_INTERRUPT_MASK_1_0 0x4809 #define SPR_INTERRUPT_MASK_1_1 0x480a +#define SPR_INTERRUPT_MASK_2_0 0x4608 +#define SPR_INTERRUPT_MASK_2_1 0x4609 #define SPR_INTERRUPT_MASK_RESET_0_0 0x4a0a #define SPR_INTERRUPT_MASK_RESET_0_1 0x4a0b #define SPR_INTERRUPT_MASK_RESET_1_0 0x480b #define SPR_INTERRUPT_MASK_RESET_1_1 0x480c +#define SPR_INTERRUPT_MASK_RESET_2_0 0x460a +#define SPR_INTERRUPT_MASK_RESET_2_1 0x460b #define SPR_INTERRUPT_MASK_SET_0_0 0x4a0c #define SPR_INTERRUPT_MASK_SET_0_1 0x4a0d #define SPR_INTERRUPT_MASK_SET_1_0 0x480d #define SPR_INTERRUPT_MASK_SET_1_1 0x480e +#define SPR_INTERRUPT_MASK_SET_2_0 0x460c +#define SPR_INTERRUPT_MASK_SET_2_1 0x460d #define SPR_MPL_DMA_CPL_SET_0 0x5800 #define SPR_MPL_DMA_CPL_SET_1 0x5801 +#define SPR_MPL_DMA_CPL_SET_2 0x5802 #define SPR_MPL_DMA_NOTIFY_SET_0 0x3800 #define SPR_MPL_DMA_NOTIFY_SET_1 0x3801 +#define SPR_MPL_DMA_NOTIFY_SET_2 0x3802 #define SPR_MPL_INTCTRL_0_SET_0 0x4a00 #define SPR_MPL_INTCTRL_0_SET_1 0x4a01 +#define SPR_MPL_INTCTRL_0_SET_2 0x4a02 #define SPR_MPL_INTCTRL_1_SET_0 0x4800 #define SPR_MPL_INTCTRL_1_SET_1 0x4801 +#define SPR_MPL_INTCTRL_1_SET_2 0x4802 +#define SPR_MPL_INTCTRL_2_SET_0 0x4600 +#define SPR_MPL_INTCTRL_2_SET_1 0x4601 +#define SPR_MPL_INTCTRL_2_SET_2 0x4602 #define SPR_MPL_SN_ACCESS_SET_0 0x0800 #define SPR_MPL_SN_ACCESS_SET_1 0x0801 +#define SPR_MPL_SN_ACCESS_SET_2 0x0802 #define SPR_MPL_SN_CPL_SET_0 0x5a00 #define SPR_MPL_SN_CPL_SET_1 0x5a01 +#define SPR_MPL_SN_CPL_SET_2 0x5a02 #define SPR_MPL_SN_FIREWALL_SET_0 0x2c00 #define SPR_MPL_SN_FIREWALL_SET_1 0x2c01 +#define SPR_MPL_SN_FIREWALL_SET_2 0x2c02 #define SPR_MPL_SN_NOTIFY_SET_0 0x2a00 #define SPR_MPL_SN_NOTIFY_SET_1 0x2a01 +#define SPR_MPL_SN_NOTIFY_SET_2 0x2a02 #define SPR_MPL_UDN_ACCESS_SET_0 0x0c00 #define SPR_MPL_UDN_ACCESS_SET_1 0x0c01 +#define SPR_MPL_UDN_ACCESS_SET_2 0x0c02 #define SPR_MPL_UDN_AVAIL_SET_0 0x4000 #define SPR_MPL_UDN_AVAIL_SET_1 0x4001 +#define SPR_MPL_UDN_AVAIL_SET_2 0x4002 #define SPR_MPL_UDN_CA_SET_0 0x3c00 #define SPR_MPL_UDN_CA_SET_1 0x3c01 +#define SPR_MPL_UDN_CA_SET_2 0x3c02 #define SPR_MPL_UDN_COMPLETE_SET_0 0x1400 #define SPR_MPL_UDN_COMPLETE_SET_1 0x1401 +#define SPR_MPL_UDN_COMPLETE_SET_2 0x1402 #define SPR_MPL_UDN_FIREWALL_SET_0 0x3000 #define SPR_MPL_UDN_FIREWALL_SET_1 0x3001 +#define SPR_MPL_UDN_FIREWALL_SET_2 0x3002 #define SPR_MPL_UDN_REFILL_SET_0 0x1000 #define SPR_MPL_UDN_REFILL_SET_1 0x1001 +#define SPR_MPL_UDN_REFILL_SET_2 0x1002 #define SPR_MPL_UDN_TIMER_SET_0 0x3600 #define SPR_MPL_UDN_TIMER_SET_1 0x3601 +#define SPR_MPL_UDN_TIMER_SET_2 0x3602 #define SPR_MPL_WORLD_ACCESS_SET_0 0x4e00 #define SPR_MPL_WORLD_ACCESS_SET_1 0x4e01 +#define SPR_MPL_WORLD_ACCESS_SET_2 0x4e02 #define SPR_PASS 0x4e0b #define SPR_PERF_COUNT_0 0x4205 #define SPR_PERF_COUNT_1 0x4206 #define SPR_PERF_COUNT_CTL 0x4207 +#define SPR_PERF_COUNT_DN_CTL 0x4210 #define SPR_PERF_COUNT_STS 0x4208 #define SPR_PROC_STATUS 0x4f00 #define SPR_SIM_CONTROL 0x4e0c @@ -124,6 +159,10 @@ #define SPR_SYSTEM_SAVE_1_1 0x4901 #define SPR_SYSTEM_SAVE_1_2 0x4902 #define SPR_SYSTEM_SAVE_1_3 0x4903 +#define SPR_SYSTEM_SAVE_2_0 0x4700 +#define SPR_SYSTEM_SAVE_2_1 0x4701 +#define SPR_SYSTEM_SAVE_2_2 0x4702 +#define SPR_SYSTEM_SAVE_2_3 0x4703 #define SPR_TILE_COORD 0x4c17 #define SPR_TILE_RTF_HWM 0x4e10 #define SPR_TILE_TIMER_CONTROL 0x3205 diff --git a/arch/tile/include/asm/backtrace.h b/arch/tile/include/asm/backtrace.h index 758ca4619d5..f18887d8239 100644 --- a/arch/tile/include/asm/backtrace.h +++ b/arch/tile/include/asm/backtrace.h @@ -146,7 +146,10 @@ enum { CALLER_SP_IN_R52_BASE = 4, - CALLER_SP_OFFSET_BASE = 8 + CALLER_SP_OFFSET_BASE = 8, + + /* Marks the entry point of certain functions. */ + ENTRY_POINT_INFO_OP = 16 }; diff --git a/arch/tile/include/asm/compat.h b/arch/tile/include/asm/compat.h index 8b60ec8b2d1..c3ae570c0a5 100644 --- a/arch/tile/include/asm/compat.h +++ b/arch/tile/include/asm/compat.h @@ -216,15 +216,16 @@ struct compat_siginfo; struct compat_sigaltstack; long compat_sys_execve(const char __user *path, const compat_uptr_t __user *argv, - const compat_uptr_t __user *envp); + const compat_uptr_t __user *envp, struct pt_regs *); long compat_sys_rt_sigaction(int sig, struct compat_sigaction __user *act, struct compat_sigaction __user *oact, size_t sigsetsize); long compat_sys_rt_sigqueueinfo(int pid, int sig, struct compat_siginfo __user *uinfo); -long compat_sys_rt_sigreturn(void); +long compat_sys_rt_sigreturn(struct pt_regs *); long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, - struct compat_sigaltstack __user *uoss_ptr); + struct compat_sigaltstack __user *uoss_ptr, + struct pt_regs *); long compat_sys_truncate64(char __user *filename, u32 dummy, u32 low, u32 high); long compat_sys_ftruncate64(unsigned int fd, u32 dummy, u32 low, u32 high); long compat_sys_pread64(unsigned int fd, char __user *ubuf, size_t count, @@ -255,4 +256,12 @@ long tile_compat_sys_ptrace(compat_long_t request, compat_long_t pid, /* Tilera Linux syscalls that don't have "compat" versions. */ #define compat_sys_flush_cache sys_flush_cache +/* These are the intvec_64.S trampolines. */ +long _compat_sys_execve(const char __user *path, + const compat_uptr_t __user *argv, + const compat_uptr_t __user *envp); +long _compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, + struct compat_sigaltstack __user *uoss_ptr); +long _compat_sys_rt_sigreturn(void); + #endif /* _ASM_TILE_COMPAT_H */ diff --git a/arch/tile/include/asm/irqflags.h b/arch/tile/include/asm/irqflags.h index a11d4837ee4..641e4ff3d80 100644 --- a/arch/tile/include/asm/irqflags.h +++ b/arch/tile/include/asm/irqflags.h @@ -47,53 +47,53 @@ int __n = (n); \ int __mask = 1 << (__n & 0x1f); \ if (__n < 32) \ - __insn_mtspr(SPR_INTERRUPT_MASK_SET_1_0, __mask); \ + __insn_mtspr(SPR_INTERRUPT_MASK_SET_K_0, __mask); \ else \ - __insn_mtspr(SPR_INTERRUPT_MASK_SET_1_1, __mask); \ + __insn_mtspr(SPR_INTERRUPT_MASK_SET_K_1, __mask); \ } while (0) #define interrupt_mask_reset(n) do { \ int __n = (n); \ int __mask = 1 << (__n & 0x1f); \ if (__n < 32) \ - __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1_0, __mask); \ + __insn_mtspr(SPR_INTERRUPT_MASK_RESET_K_0, __mask); \ else \ - __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1_1, __mask); \ + __insn_mtspr(SPR_INTERRUPT_MASK_RESET_K_1, __mask); \ } while (0) #define interrupt_mask_check(n) ({ \ int __n = (n); \ (((__n < 32) ? \ - __insn_mfspr(SPR_INTERRUPT_MASK_1_0) : \ - __insn_mfspr(SPR_INTERRUPT_MASK_1_1)) \ + __insn_mfspr(SPR_INTERRUPT_MASK_K_0) : \ + __insn_mfspr(SPR_INTERRUPT_MASK_K_1)) \ >> (__n & 0x1f)) & 1; \ }) #define interrupt_mask_set_mask(mask) do { \ unsigned long long __m = (mask); \ - __insn_mtspr(SPR_INTERRUPT_MASK_SET_1_0, (unsigned long)(__m)); \ - __insn_mtspr(SPR_INTERRUPT_MASK_SET_1_1, (unsigned long)(__m>>32)); \ + __insn_mtspr(SPR_INTERRUPT_MASK_SET_K_0, (unsigned long)(__m)); \ + __insn_mtspr(SPR_INTERRUPT_MASK_SET_K_1, (unsigned long)(__m>>32)); \ } while (0) #define interrupt_mask_reset_mask(mask) do { \ unsigned long long __m = (mask); \ - __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1_0, (unsigned long)(__m)); \ - __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1_1, (unsigned long)(__m>>32)); \ + __insn_mtspr(SPR_INTERRUPT_MASK_RESET_K_0, (unsigned long)(__m)); \ + __insn_mtspr(SPR_INTERRUPT_MASK_RESET_K_1, (unsigned long)(__m>>32)); \ } while (0) #else #define interrupt_mask_set(n) \ - __insn_mtspr(SPR_INTERRUPT_MASK_SET_1, (1UL << (n))) + __insn_mtspr(SPR_INTERRUPT_MASK_SET_K, (1UL << (n))) #define interrupt_mask_reset(n) \ - __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1, (1UL << (n))) + __insn_mtspr(SPR_INTERRUPT_MASK_RESET_K, (1UL << (n))) #define interrupt_mask_check(n) \ - ((__insn_mfspr(SPR_INTERRUPT_MASK_1) >> (n)) & 1) + ((__insn_mfspr(SPR_INTERRUPT_MASK_K) >> (n)) & 1) #define interrupt_mask_set_mask(mask) \ - __insn_mtspr(SPR_INTERRUPT_MASK_SET_1, (mask)) + __insn_mtspr(SPR_INTERRUPT_MASK_SET_K, (mask)) #define interrupt_mask_reset_mask(mask) \ - __insn_mtspr(SPR_INTERRUPT_MASK_RESET_1, (mask)) + __insn_mtspr(SPR_INTERRUPT_MASK_RESET_K, (mask)) #endif /* * The set of interrupts we want active if irqs are enabled. * Note that in particular, the tile timer interrupt comes and goes * from this set, since we have no other way to turn off the timer. - * Likewise, INTCTRL_1 is removed and re-added during device + * Likewise, INTCTRL_K is removed and re-added during device * interrupts, as is the the hardwall UDN_FIREWALL interrupt. * We use a low bit (MEM_ERROR) as our sentinel value and make sure it * is always claimed as an "active interrupt" so we can query that bit @@ -170,14 +170,14 @@ DECLARE_PER_CPU(unsigned long long, interrupts_enabled_mask); /* Return 0 or 1 to indicate whether interrupts are currently disabled. */ #define IRQS_DISABLED(tmp) \ - mfspr tmp, INTERRUPT_MASK_1; \ + mfspr tmp, SPR_INTERRUPT_MASK_K; \ andi tmp, tmp, 1 /* Load up a pointer to &interrupts_enabled_mask. */ #define GET_INTERRUPTS_ENABLED_MASK_PTR(reg) \ - moveli reg, hw2_last(interrupts_enabled_mask); \ - shl16insli reg, reg, hw1(interrupts_enabled_mask); \ - shl16insli reg, reg, hw0(interrupts_enabled_mask); \ + moveli reg, hw2_last(interrupts_enabled_mask); \ + shl16insli reg, reg, hw1(interrupts_enabled_mask); \ + shl16insli reg, reg, hw0(interrupts_enabled_mask); \ add reg, reg, tp /* Disable interrupts. */ @@ -185,18 +185,18 @@ DECLARE_PER_CPU(unsigned long long, interrupts_enabled_mask); moveli tmp0, hw2_last(LINUX_MASKABLE_INTERRUPTS); \ shl16insli tmp0, tmp0, hw1(LINUX_MASKABLE_INTERRUPTS); \ shl16insli tmp0, tmp0, hw0(LINUX_MASKABLE_INTERRUPTS); \ - mtspr INTERRUPT_MASK_SET_1, tmp0 + mtspr SPR_INTERRUPT_MASK_SET_K, tmp0 /* Disable ALL synchronous interrupts (used by NMI entry). */ #define IRQ_DISABLE_ALL(tmp) \ movei tmp, -1; \ - mtspr INTERRUPT_MASK_SET_1, tmp + mtspr SPR_INTERRUPT_MASK_SET_K, tmp /* Enable interrupts. */ #define IRQ_ENABLE(tmp0, tmp1) \ GET_INTERRUPTS_ENABLED_MASK_PTR(tmp0); \ ld tmp0, tmp0; \ - mtspr INTERRUPT_MASK_RESET_1, tmp0 + mtspr SPR_INTERRUPT_MASK_RESET_K, tmp0 #else /* !__tilegx__ */ @@ -210,14 +210,14 @@ DECLARE_PER_CPU(unsigned long long, interrupts_enabled_mask); * (making the original code's write of the "high" mask word idempotent). */ #define IRQS_DISABLED(tmp) \ - mfspr tmp, INTERRUPT_MASK_1_0; \ + mfspr tmp, SPR_INTERRUPT_MASK_K_0; \ shri tmp, tmp, INT_MEM_ERROR; \ andi tmp, tmp, 1 /* Load up a pointer to &interrupts_enabled_mask. */ #define GET_INTERRUPTS_ENABLED_MASK_PTR(reg) \ - moveli reg, lo16(interrupts_enabled_mask); \ - auli reg, reg, ha16(interrupts_enabled_mask);\ + moveli reg, lo16(interrupts_enabled_mask); \ + auli reg, reg, ha16(interrupts_enabled_mask); \ add reg, reg, tp /* Disable interrupts. */ @@ -227,16 +227,16 @@ DECLARE_PER_CPU(unsigned long long, interrupts_enabled_mask); moveli tmp1, lo16(LINUX_MASKABLE_INTERRUPTS) \ }; \ { \ - mtspr INTERRUPT_MASK_SET_1_0, tmp0; \ + mtspr SPR_INTERRUPT_MASK_SET_K_0, tmp0; \ auli tmp1, tmp1, ha16(LINUX_MASKABLE_INTERRUPTS) \ }; \ - mtspr INTERRUPT_MASK_SET_1_1, tmp1 + mtspr SPR_INTERRUPT_MASK_SET_K_1, tmp1 /* Disable ALL synchronous interrupts (used by NMI entry). */ #define IRQ_DISABLE_ALL(tmp) \ movei tmp, -1; \ - mtspr INTERRUPT_MASK_SET_1_0, tmp; \ - mtspr INTERRUPT_MASK_SET_1_1, tmp + mtspr SPR_INTERRUPT_MASK_SET_K_0, tmp; \ + mtspr SPR_INTERRUPT_MASK_SET_K_1, tmp /* Enable interrupts. */ #define IRQ_ENABLE(tmp0, tmp1) \ @@ -246,8 +246,8 @@ DECLARE_PER_CPU(unsigned long long, interrupts_enabled_mask); addi tmp1, tmp0, 4 \ }; \ lw tmp1, tmp1; \ - mtspr INTERRUPT_MASK_RESET_1_0, tmp0; \ - mtspr INTERRUPT_MASK_RESET_1_1, tmp1 + mtspr SPR_INTERRUPT_MASK_RESET_K_0, tmp0; \ + mtspr SPR_INTERRUPT_MASK_RESET_K_1, tmp1 #endif /* diff --git a/arch/tile/include/asm/mman.h b/arch/tile/include/asm/mman.h index 4c6811e3e8d..81b8fc348d6 100644 --- a/arch/tile/include/asm/mman.h +++ b/arch/tile/include/asm/mman.h @@ -23,6 +23,7 @@ #define MAP_POPULATE 0x0040 /* populate (prefault) pagetables */ #define MAP_NONBLOCK 0x0080 /* do not block on IO */ #define MAP_GROWSDOWN 0x0100 /* stack-like segment */ +#define MAP_STACK MAP_GROWSDOWN /* provide convenience alias */ #define MAP_LOCKED 0x0200 /* pages are locked */ #define MAP_NORESERVE 0x0400 /* don't check for reservations */ #define MAP_DENYWRITE 0x0800 /* ETXTBSY */ diff --git a/arch/tile/include/asm/page.h b/arch/tile/include/asm/page.h index 7d90641cf18..7979a45430d 100644 --- a/arch/tile/include/asm/page.h +++ b/arch/tile/include/asm/page.h @@ -199,17 +199,17 @@ static inline __attribute_const__ int get_order(unsigned long size) * If you want more physical memory than this then see the CONFIG_HIGHMEM * option in the kernel configuration. * - * The top two 16MB chunks in the table below (VIRT and HV) are - * unavailable to Linux. Since the kernel interrupt vectors must live - * at 0xfd000000, we map all of the bottom of RAM at this address with - * a huge page table entry to minimize its ITLB footprint (as well as - * at PAGE_OFFSET). The last architected requirement is that user - * interrupt vectors live at 0xfc000000, so we make that range of - * memory available to user processes. The remaining regions are sized - * as shown; after the first four addresses, we show "typical" values, - * since the actual addresses depend on kernel #defines. + * The top 16MB chunk in the table below is unavailable to Linux. Since + * the kernel interrupt vectors must live at ether 0xfe000000 or 0xfd000000 + * (depending on whether the kernel is at PL2 or Pl1), we map all of the + * bottom of RAM at this address with a huge page table entry to minimize + * its ITLB footprint (as well as at PAGE_OFFSET). The last architected + * requirement is that user interrupt vectors live at 0xfc000000, so we + * make that range of memory available to user processes. The remaining + * regions are sized as shown; the first four addresses use the PL 1 + * values, and after that, we show "typical" values, since the actual + * addresses depend on kernel #defines. * - * MEM_VIRT_INTRPT 0xff000000 * MEM_HV_INTRPT 0xfe000000 * MEM_SV_INTRPT (kernel code) 0xfd000000 * MEM_USER_INTRPT (user vector) 0xfc000000 @@ -221,9 +221,14 @@ static inline __attribute_const__ int get_order(unsigned long size) */ #define MEM_USER_INTRPT _AC(0xfc000000, UL) +#if CONFIG_KERNEL_PL == 1 #define MEM_SV_INTRPT _AC(0xfd000000, UL) #define MEM_HV_INTRPT _AC(0xfe000000, UL) -#define MEM_VIRT_INTRPT _AC(0xff000000, UL) +#else +#define MEM_GUEST_INTRPT _AC(0xfd000000, UL) +#define MEM_SV_INTRPT _AC(0xfe000000, UL) +#define MEM_HV_INTRPT _AC(0xff000000, UL) +#endif #define INTRPT_SIZE 0x4000 diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h index ccd5f842568..1747ff3946b 100644 --- a/arch/tile/include/asm/processor.h +++ b/arch/tile/include/asm/processor.h @@ -328,18 +328,21 @@ extern int kdata_huge; * Note that assembly code assumes that USER_PL is zero. */ #define USER_PL 0 -#define KERNEL_PL 1 +#if CONFIG_KERNEL_PL == 2 +#define GUEST_PL 1 +#endif +#define KERNEL_PL CONFIG_KERNEL_PL -/* SYSTEM_SAVE_1_0 holds the current cpu number ORed with ksp0. */ +/* SYSTEM_SAVE_K_0 holds the current cpu number ORed with ksp0. */ #define CPU_LOG_MASK_VALUE 12 #define CPU_MASK_VALUE ((1 << CPU_LOG_MASK_VALUE) - 1) #if CONFIG_NR_CPUS > CPU_MASK_VALUE # error Too many cpus! #endif #define raw_smp_processor_id() \ - ((int)__insn_mfspr(SPR_SYSTEM_SAVE_1_0) & CPU_MASK_VALUE) + ((int)__insn_mfspr(SPR_SYSTEM_SAVE_K_0) & CPU_MASK_VALUE) #define get_current_ksp0() \ - (__insn_mfspr(SPR_SYSTEM_SAVE_1_0) & ~CPU_MASK_VALUE) + (__insn_mfspr(SPR_SYSTEM_SAVE_K_0) & ~CPU_MASK_VALUE) #define next_current_ksp0(task) ({ \ unsigned long __ksp0 = task_ksp0(task); \ int __cpu = raw_smp_processor_id(); \ diff --git a/arch/tile/include/asm/ptrace.h b/arch/tile/include/asm/ptrace.h index 4a02bb07397..ac6d343129d 100644 --- a/arch/tile/include/asm/ptrace.h +++ b/arch/tile/include/asm/ptrace.h @@ -62,8 +62,8 @@ struct pt_regs { pt_reg_t lr; /* aliases regs[TREG_LR] */ /* Saved special registers. */ - pt_reg_t pc; /* stored in EX_CONTEXT_1_0 */ - pt_reg_t ex1; /* stored in EX_CONTEXT_1_1 (PL and ICS bit) */ + pt_reg_t pc; /* stored in EX_CONTEXT_K_0 */ + pt_reg_t ex1; /* stored in EX_CONTEXT_K_1 (PL and ICS bit) */ pt_reg_t faultnum; /* fault number (INT_SWINT_1 for syscall) */ pt_reg_t orig_r0; /* r0 at syscall entry, else zero */ pt_reg_t flags; /* flags (see below) */ diff --git a/arch/tile/include/asm/syscalls.h b/arch/tile/include/asm/syscalls.h index ce99ffefeac..3b5507c31ea 100644 --- a/arch/tile/include/asm/syscalls.h +++ b/arch/tile/include/asm/syscalls.h @@ -32,8 +32,9 @@ extern void *compat_sys_call_table[]; /* * Note that by convention, any syscall which requires the current - * register set takes an additional "struct pt_regs *" pointer; the - * sys_xxx() function just adds the pointer and tail-calls to _sys_xxx(). + * register set takes an additional "struct pt_regs *" pointer; a + * _sys_xxx() trampoline in intvec*.S just sets up the pointer and + * jumps to sys_xxx(). */ /* kernel/sys.c */ @@ -43,66 +44,17 @@ long sys32_fadvise64(int fd, u32 offset_lo, u32 offset_hi, int sys32_fadvise64_64(int fd, u32 offset_lo, u32 offset_hi, u32 len_lo, u32 len_hi, int advice); long sys_flush_cache(void); -long sys_mmap2(unsigned long addr, unsigned long len, - unsigned long prot, unsigned long flags, - unsigned long fd, unsigned long pgoff); -#ifdef __tilegx__ -long sys_mmap(unsigned long addr, unsigned long len, - unsigned long prot, unsigned long flags, - unsigned long fd, off_t pgoff); +#ifndef __tilegx__ /* No mmap() in the 32-bit kernel. */ +#define sys_mmap sys_mmap #endif -/* kernel/process.c */ -long sys_clone(unsigned long clone_flags, unsigned long newsp, - void __user *parent_tid, void __user *child_tid); -long _sys_clone(unsigned long clone_flags, unsigned long newsp, - void __user *parent_tid, void __user *child_tid, - struct pt_regs *regs); -long sys_fork(void); -long _sys_fork(struct pt_regs *regs); -long sys_vfork(void); -long _sys_vfork(struct pt_regs *regs); -long sys_execve(const char __user *filename, - const char __user *const __user *argv, - const char __user *const __user *envp); -long _sys_execve(const char __user *filename, - const char __user *const __user *argv, - const char __user *const __user *envp, struct pt_regs *regs); - -/* kernel/signal.c */ -long sys_sigaltstack(const stack_t __user *, stack_t __user *); -long _sys_sigaltstack(const stack_t __user *, stack_t __user *, - struct pt_regs *); -long sys_rt_sigreturn(void); -long _sys_rt_sigreturn(struct pt_regs *regs); - -/* platform-independent functions */ -long sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize); -long sys_rt_sigaction(int sig, const struct sigaction __user *act, - struct sigaction __user *oact, size_t sigsetsize); - #ifndef __tilegx__ /* mm/fault.c */ -int sys_cmpxchg_badaddr(unsigned long address); -int _sys_cmpxchg_badaddr(unsigned long address, struct pt_regs *); +long sys_cmpxchg_badaddr(unsigned long address, struct pt_regs *); +long _sys_cmpxchg_badaddr(unsigned long address); #endif #ifdef CONFIG_COMPAT -long compat_sys_execve(const char __user *path, - const compat_uptr_t __user *argv, - const compat_uptr_t __user *envp); -long _compat_sys_execve(const char __user *path, - const compat_uptr_t __user *argv, - const compat_uptr_t __user *envp, - struct pt_regs *regs); -long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, - struct compat_sigaltstack __user *uoss_ptr); -long _compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, - struct compat_sigaltstack __user *uoss_ptr, - struct pt_regs *regs); -long compat_sys_rt_sigreturn(void); -long _compat_sys_rt_sigreturn(struct pt_regs *regs); - /* These four are not defined for 64-bit, but serve as "compat" syscalls. */ long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg); long sys_fstat64(unsigned long fd, struct stat64 __user *statbuf); @@ -110,4 +62,15 @@ long sys_truncate64(const char __user *path, loff_t length); long sys_ftruncate64(unsigned int fd, loff_t length); #endif +/* These are the intvec*.S trampolines. */ +long _sys_sigaltstack(const stack_t __user *, stack_t __user *); +long _sys_rt_sigreturn(void); +long _sys_clone(unsigned long clone_flags, unsigned long newsp, + void __user *parent_tid, void __user *child_tid); +long _sys_execve(const char __user *filename, + const char __user *const __user *argv, + const char __user *const __user *envp); + +#include <asm-generic/syscalls.h> + #endif /* _ASM_TILE_SYSCALLS_H */ diff --git a/arch/tile/include/asm/system.h b/arch/tile/include/asm/system.h index f749be327ce..5388850deeb 100644 --- a/arch/tile/include/asm/system.h +++ b/arch/tile/include/asm/system.h @@ -89,6 +89,10 @@ #define get_cycles_low() __insn_mfspr(SPR_CYCLE) /* just get all 64 bits */ #endif +#if !CHIP_HAS_MF_WAITS_FOR_VICTIMS() +int __mb_incoherent(void); /* Helper routine for mb_incoherent(). */ +#endif + /* Fence to guarantee visibility of stores to incoherent memory. */ static inline void mb_incoherent(void) @@ -97,7 +101,6 @@ mb_incoherent(void) #if !CHIP_HAS_MF_WAITS_FOR_VICTIMS() { - int __mb_incoherent(void); #if CHIP_HAS_TILE_WRITE_PENDING() const unsigned long WRITE_TIMEOUT_CYCLES = 400; unsigned long start = get_cycles_low(); @@ -161,7 +164,7 @@ extern struct task_struct *_switch_to(struct task_struct *prev, /* Helper function for _switch_to(). */ extern struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *next, - unsigned long new_system_save_1_0); + unsigned long new_system_save_k_0); /* Address that switched-away from tasks are at. */ extern unsigned long get_switch_to_pc(void); @@ -214,13 +217,6 @@ int hardwall_deactivate(struct task_struct *task); } while (0) #endif -/* Invoke the simulator "syscall" mechanism (see arch/tile/kernel/entry.S). */ -extern int _sim_syscall(int syscall_num, ...); -#define sim_syscall(syscall_num, ...) \ - _sim_syscall(SIM_CONTROL_SYSCALL + \ - ((syscall_num) << _SIM_CONTROL_OPERATOR_BITS), \ - ## __VA_ARGS__) - /* * Kernel threads can check to see if they need to migrate their * stack whenever they return from a context switch; for user diff --git a/arch/tile/include/asm/traps.h b/arch/tile/include/asm/traps.h index 432a9c15c8a..d06e35f5720 100644 --- a/arch/tile/include/asm/traps.h +++ b/arch/tile/include/asm/traps.h @@ -59,4 +59,8 @@ void do_hardwall_trap(struct pt_regs *, int fault_num); void do_breakpoint(struct pt_regs *, int fault_num); +#ifdef __tilegx__ +void gx_singlestep_handle(struct pt_regs *, int fault_num); +#endif + #endif /* _ASM_TILE_SYSCALLS_H */ diff --git a/arch/tile/include/hv/hypervisor.h b/arch/tile/include/hv/hypervisor.h index 9bd303a141b..f672544cd4f 100644 --- a/arch/tile/include/hv/hypervisor.h +++ b/arch/tile/include/hv/hypervisor.h @@ -1003,37 +1003,37 @@ int hv_console_write(HV_VirtAddr bytes, int len); * when these occur in a client's interrupt critical section, they must * be delivered through the downcall mechanism. * - * A downcall is initially delivered to the client as an INTCTRL_1 - * interrupt. Upon entry to the INTCTRL_1 vector, the client must - * immediately invoke the hv_downcall_dispatch service. This service - * will not return; instead it will cause one of the client's actual - * downcall-handling interrupt vectors to be entered. The EX_CONTEXT - * registers in the client will be set so that when the client irets, - * it will return to the code which was interrupted by the INTCTRL_1 - * interrupt. - * - * Under some circumstances, the firing of INTCTRL_1 can race with + * A downcall is initially delivered to the client as an INTCTRL_CL + * interrupt, where CL is the client's PL. Upon entry to the INTCTRL_CL + * vector, the client must immediately invoke the hv_downcall_dispatch + * service. This service will not return; instead it will cause one of + * the client's actual downcall-handling interrupt vectors to be entered. + * The EX_CONTEXT registers in the client will be set so that when the + * client irets, it will return to the code which was interrupted by the + * INTCTRL_CL interrupt. + * + * Under some circumstances, the firing of INTCTRL_CL can race with * the lowering of a device interrupt. In such a case, the * hv_downcall_dispatch service may issue an iret instruction instead * of entering one of the client's actual downcall-handling interrupt * vectors. This will return execution to the location that was - * interrupted by INTCTRL_1. + * interrupted by INTCTRL_CL. * * Any saving of registers should be done by the actual handling - * vectors; no registers should be changed by the INTCTRL_1 handler. + * vectors; no registers should be changed by the INTCTRL_CL handler. * In particular, the client should not use a jal instruction to invoke * the hv_downcall_dispatch service, as that would overwrite the client's * lr register. Note that the hv_downcall_dispatch service may overwrite * one or more of the client's system save registers. * - * The client must not modify the INTCTRL_1_STATUS SPR. The hypervisor + * The client must not modify the INTCTRL_CL_STATUS SPR. The hypervisor * will set this register to cause a downcall to happen, and will clear * it when no further downcalls are pending. * - * When a downcall vector is entered, the INTCTRL_1 interrupt will be + * When a downcall vector is entered, the INTCTRL_CL interrupt will be * masked. When the client is done processing a downcall, and is ready * to accept another, it must unmask this interrupt; if more downcalls - * are pending, this will cause the INTCTRL_1 vector to be reentered. + * are pending, this will cause the INTCTRL_CL vector to be reentered. * Currently the following interrupt vectors can be entered through a * downcall: * diff --git a/arch/tile/kernel/backtrace.c b/arch/tile/kernel/backtrace.c index d3c41c1ff6b..55a6a74974b 100644 --- a/arch/tile/kernel/backtrace.c +++ b/arch/tile/kernel/backtrace.c @@ -369,6 +369,10 @@ static void find_caller_pc_and_caller_sp(CallerLocation *location, /* Weird; reserved value, ignore it. */ continue; } + if (info_operand & ENTRY_POINT_INFO_OP) { + /* This info op is ignored by the backtracer. */ + continue; + } /* Skip info ops which are not in the * "one_ago" mode we want right now. diff --git a/arch/tile/kernel/compat.c b/arch/tile/kernel/compat.c index b1e06d04155..77739cdd946 100644 --- a/arch/tile/kernel/compat.c +++ b/arch/tile/kernel/compat.c @@ -154,8 +154,14 @@ long tile_compat_sys_msgrcv(int msqid, #define compat_sys_fstat64 sys_newfstat #define compat_sys_fstatat64 sys_newfstatat -/* Pass full 64-bit values through ptrace. */ -#define compat_sys_ptrace tile_compat_sys_ptrace +/* The native sys_ptrace dynamically handles compat binaries. */ +#define compat_sys_ptrace sys_ptrace + +/* Call the trampolines to manage pt_regs where necessary. */ +#define compat_sys_execve _compat_sys_execve +#define compat_sys_sigaltstack _compat_sys_sigaltstack +#define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn +#define sys_clone _sys_clone /* * Note that we can't include <linux/unistd.h> here since the header diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c index 9c710db43f1..fb64b99959d 100644 --- a/arch/tile/kernel/compat_signal.c +++ b/arch/tile/kernel/compat_signal.c @@ -256,9 +256,9 @@ int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from) return err; } -long _compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, - struct compat_sigaltstack __user *uoss_ptr, - struct pt_regs *regs) +long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, + struct compat_sigaltstack __user *uoss_ptr, + struct pt_regs *regs) { stack_t uss, uoss; int ret; @@ -291,7 +291,7 @@ long _compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, return ret; } -long _compat_sys_rt_sigreturn(struct pt_regs *regs) +long compat_sys_rt_sigreturn(struct pt_regs *regs) { struct compat_rt_sigframe __user *frame = (struct compat_rt_sigframe __user *) compat_ptr(regs->sp); @@ -312,7 +312,7 @@ long _compat_sys_rt_sigreturn(struct pt_regs *regs) if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0)) goto badframe; - if (_compat_sys_sigaltstack(&frame->uc.uc_stack, NULL, regs) != 0) + if (compat_sys_sigaltstack(&frame->uc.uc_stack, NULL, regs) != 0) goto badframe; return r0; diff --git a/arch/tile/kernel/entry.S b/arch/tile/kernel/entry.S index 3d01383b1b0..fd8dc42abdc 100644 --- a/arch/tile/kernel/entry.S +++ b/arch/tile/kernel/entry.S @@ -15,7 +15,9 @@ #include <linux/linkage.h> #include <linux/unistd.h> #include <asm/irqflags.h> +#include <asm/processor.h> #include <arch/abi.h> +#include <arch/spr_def.h> #ifdef __tilegx__ #define bnzt bnezt @@ -25,28 +27,6 @@ STD_ENTRY(current_text_addr) { move r0, lr; jrp lr } STD_ENDPROC(current_text_addr) -STD_ENTRY(_sim_syscall) - /* - * Wait for r0-r9 to be ready (and lr on the off chance we - * want the syscall to locate its caller), then make a magic - * simulator syscall. - * - * We carefully stall until the registers are readable in case they - * are the target of a slow load, etc. so that tile-sim will - * definitely be able to read all of them inside the magic syscall. - * - * Technically this is wrong for r3-r9 and lr, since an interrupt - * could come in and restore the registers with a slow load right - * before executing the mtspr. We may need to modify tile-sim to - * explicitly stall for this case, but we do not yet have - * a way to implement such a stall. - */ - { and zero, lr, r9 ; and zero, r8, r7 } - { and zero, r6, r5 ; and zero, r4, r3 } - { and zero, r2, r1 ; mtspr SIM_CONTROL, r0 } - { jrp lr } - STD_ENDPROC(_sim_syscall) - /* * Implement execve(). The i386 code has a note that forking from kernel * space results in no copy on write until the execve, so we should be @@ -102,7 +82,7 @@ STD_ENTRY(KBacktraceIterator_init_current) STD_ENTRY(cpu_idle_on_new_stack) { move sp, r1 - mtspr SYSTEM_SAVE_1_0, r2 + mtspr SPR_SYSTEM_SAVE_K_0, r2 } jal free_thread_info j cpu_idle @@ -124,15 +104,15 @@ STD_ENTRY(smp_nap) STD_ENTRY(_cpu_idle) { lnk r0 - movei r1, 1 + movei r1, KERNEL_PL } { addli r0, r0, _cpu_idle_nap - . mtspr INTERRUPT_CRITICAL_SECTION, r1 } - IRQ_ENABLE(r2, r3) /* unmask, but still with ICS set */ - mtspr EX_CONTEXT_1_1, r1 /* PL1, ICS clear */ - mtspr EX_CONTEXT_1_0, r0 + IRQ_ENABLE(r2, r3) /* unmask, but still with ICS set */ + mtspr SPR_EX_CONTEXT_K_1, r1 /* Kernel PL, ICS clear */ + mtspr SPR_EX_CONTEXT_K_0, r0 iret .global _cpu_idle_nap _cpu_idle_nap: diff --git a/arch/tile/kernel/head_32.S b/arch/tile/kernel/head_32.S index 2b4f6c09170..90e7c443569 100644 --- a/arch/tile/kernel/head_32.S +++ b/arch/tile/kernel/head_32.S @@ -23,6 +23,7 @@ #include <asm/asm-offsets.h> #include <hv/hypervisor.h> #include <arch/chip.h> +#include <arch/spr_def.h> /* * This module contains the entry code for kernel images. It performs the @@ -76,7 +77,7 @@ ENTRY(_start) } 1: - /* Get our processor number and save it away in SAVE_1_0. */ + /* Get our processor number and save it away in SAVE_K_0. */ jal hv_inquire_topology mulll_uu r4, r1, r2 /* r1 == y, r2 == width */ add r4, r4, r0 /* r0 == x, so r4 == cpu == y*width + x */ @@ -124,7 +125,7 @@ ENTRY(_start) lw r0, r0 lw sp, r1 or r4, sp, r4 - mtspr SYSTEM_SAVE_1_0, r4 /* save ksp0 + cpu */ + mtspr SPR_SYSTEM_SAVE_K_0, r4 /* save ksp0 + cpu */ addi sp, sp, -STACK_TOP_DELTA { move lr, zero /* stop backtraces in the called function */ diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S index 8f58bdff20d..f5821626247 100644 --- a/arch/tile/kernel/intvec_32.S +++ b/arch/tile/kernel/intvec_32.S @@ -32,8 +32,8 @@ # error "No support for kernel preemption currently" #endif -#if INT_INTCTRL_1 < 32 || INT_INTCTRL_1 >= 48 -# error INT_INTCTRL_1 coded to set high interrupt mask +#if INT_INTCTRL_K < 32 || INT_INTCTRL_K >= 48 +# error INT_INTCTRL_K coded to set high interrupt mask #endif #define PTREGS_PTR(reg, ptreg) addli reg, sp, C_ABI_SAVE_AREA_SIZE + (ptreg) @@ -132,8 +132,8 @@ intvec_\vecname: /* Temporarily save a register so we have somewhere to work. */ - mtspr SYSTEM_SAVE_1_1, r0 - mfspr r0, EX_CONTEXT_1_1 + mtspr SPR_SYSTEM_SAVE_K_1, r0 + mfspr r0, SPR_EX_CONTEXT_K_1 /* The cmpxchg code clears sp to force us to reset it here on fault. */ { @@ -167,18 +167,18 @@ intvec_\vecname: * The page_fault handler may be downcalled directly by the * hypervisor even when Linux is running and has ICS set. * - * In this case the contents of EX_CONTEXT_1_1 reflect the + * In this case the contents of EX_CONTEXT_K_1 reflect the * previous fault and can't be relied on to choose whether or * not to reinitialize the stack pointer. So we add a test - * to see whether SYSTEM_SAVE_1_2 has the high bit set, + * to see whether SYSTEM_SAVE_K_2 has the high bit set, * and if so we don't reinitialize sp, since we must be coming * from Linux. (In fact the precise case is !(val & ~1), * but any Linux PC has to have the high bit set.) * - * Note that the hypervisor *always* sets SYSTEM_SAVE_1_2 for + * Note that the hypervisor *always* sets SYSTEM_SAVE_K_2 for * any path that turns into a downcall to one of our TLB handlers. */ - mfspr r0, SYSTEM_SAVE_1_2 + mfspr r0, SPR_SYSTEM_SAVE_K_2 { blz r0, 0f /* high bit in S_S_1_2 is for a PC to use */ move r0, sp @@ -187,12 +187,12 @@ intvec_\vecname: 2: /* - * SYSTEM_SAVE_1_0 holds the cpu number in the low bits, and + * SYSTEM_SAVE_K_0 holds the cpu number in the low bits, and * the current stack top in the higher bits. So we recover * our stack top by just masking off the low bits, then * point sp at the top aligned address on the actual stack page. */ - mfspr r0, SYSTEM_SAVE_1_0 + mfspr r0, SPR_SYSTEM_SAVE_K_0 mm r0, r0, zero, LOG2_THREAD_SIZE, 31 0: @@ -254,7 +254,7 @@ intvec_\vecname: sw sp, r3 addli sp, sp, PTREGS_OFFSET_PC - PTREGS_OFFSET_REG(3) } - mfspr r0, EX_CONTEXT_1_0 + mfspr r0, SPR_EX_CONTEXT_K_0 .ifc \processing,handle_syscall /* * Bump the saved PC by one bundle so that when we return, we won't @@ -267,7 +267,7 @@ intvec_\vecname: sw sp, r0 addli sp, sp, PTREGS_OFFSET_EX1 - PTREGS_OFFSET_PC } - mfspr r0, EX_CONTEXT_1_1 + mfspr r0, SPR_EX_CONTEXT_K_1 { sw sp, r0 addi sp, sp, PTREGS_OFFSET_FAULTNUM - PTREGS_OFFSET_EX1 @@ -289,7 +289,7 @@ intvec_\vecname: .endif addli sp, sp, PTREGS_OFFSET_REG(0) - PTREGS_OFFSET_FAULTNUM } - mfspr r0, SYSTEM_SAVE_1_1 /* Original r0 */ + mfspr r0, SPR_SYSTEM_SAVE_K_1 /* Original r0 */ { sw sp, r0 addi sp, sp, -PTREGS_OFFSET_REG(0) - 4 @@ -309,12 +309,12 @@ intvec_\vecname: * See discussion below at "finish_interrupt_save". */ .ifc \c_routine, do_page_fault - mfspr r2, SYSTEM_SAVE_1_3 /* address of page fault */ - mfspr r3, SYSTEM_SAVE_1_2 /* info about page fault */ + mfspr r2, SPR_SYSTEM_SAVE_K_3 /* address of page fault */ + mfspr r3, SPR_SYSTEM_SAVE_K_2 /* info about page fault */ .else .ifc \vecnum, INT_DOUBLE_FAULT { - mfspr r2, SYSTEM_SAVE_1_2 /* double fault info from HV */ + mfspr r2, SPR_SYSTEM_SAVE_K_2 /* double fault info from HV */ movei r3, 0 } .else @@ -467,7 +467,7 @@ intvec_\vecname: /* Load tp with our per-cpu offset. */ #ifdef CONFIG_SMP { - mfspr r20, SYSTEM_SAVE_1_0 + mfspr r20, SPR_SYSTEM_SAVE_K_0 moveli r21, lo16(__per_cpu_offset) } { @@ -487,7 +487,7 @@ intvec_\vecname: * We load flags in r32 here so we can jump to .Lrestore_regs * directly after do_page_fault_ics() if necessary. */ - mfspr r32, EX_CONTEXT_1_1 + mfspr r32, SPR_EX_CONTEXT_K_1 { andi r32, r32, SPR_EX_CONTEXT_1_1__PL_MASK /* mask off ICS */ PTREGS_PTR(r21, PTREGS_OFFSET_FLAGS) @@ -957,11 +957,11 @@ STD_ENTRY(interrupt_return) pop_reg_zero r21, r3, sp, PTREGS_OFFSET_EX1 - PTREGS_OFFSET_PC pop_reg_zero lr, r4, sp, PTREGS_OFFSET_REG(52) - PTREGS_OFFSET_EX1 { - mtspr EX_CONTEXT_1_0, r21 + mtspr SPR_EX_CONTEXT_K_0, r21 move r5, zero } { - mtspr EX_CONTEXT_1_1, lr + mtspr SPR_EX_CONTEXT_K_1, lr andi lr, lr, SPR_EX_CONTEXT_1_1__PL_MASK /* mask off ICS */ } @@ -1020,7 +1020,7 @@ STD_ENTRY(interrupt_return) /* Set r1 to errno if we are returning an error, otherwise zero. */ { - moveli r29, 1024 + moveli r29, 4096 sub r1, zero, r0 } slt_u r29, r1, r29 @@ -1199,7 +1199,7 @@ STD_ENTRY(interrupt_return) STD_ENDPROC(interrupt_return) /* - * This interrupt variant clears the INT_INTCTRL_1 interrupt mask bit + * This interrupt variant clears the INT_INTCTRL_K interrupt mask bit * before returning, so we can properly get more downcalls. */ .pushsection .text.handle_interrupt_downcall,"ax" @@ -1208,11 +1208,11 @@ handle_interrupt_downcall: check_single_stepping normal, .Ldispatch_downcall .Ldispatch_downcall: - /* Clear INTCTRL_1 from the set of interrupts we ever enable. */ + /* Clear INTCTRL_K from the set of interrupts we ever enable. */ GET_INTERRUPTS_ENABLED_MASK_PTR(r30) { addi r30, r30, 4 - movei r31, INT_MASK(INT_INTCTRL_1) + movei r31, INT_MASK(INT_INTCTRL_K) } { lw r20, r30 @@ -1227,7 +1227,7 @@ handle_interrupt_downcall: } FEEDBACK_REENTER(handle_interrupt_downcall) - /* Allow INTCTRL_1 to be enabled next time we enable interrupts. */ + /* Allow INTCTRL_K to be enabled next time we enable interrupts. */ lw r20, r30 or r20, r20, r31 sw r30, r20 @@ -1472,7 +1472,12 @@ handle_ill: lw r26, r24 sw r28, r26 - /* Clear TIF_SINGLESTEP */ + /* + * Clear TIF_SINGLESTEP to prevent recursion if we execute an ill. + * The normal non-arch flow redundantly clears TIF_SINGLESTEP, but we + * need to clear it here and can't really impose on all other arches. + * So what's another write between friends? + */ GET_THREAD_INFO(r0) addi r1, r0, THREAD_INFO_FLAGS_OFFSET @@ -1509,7 +1514,7 @@ handle_ill: /* Various stub interrupt handlers and syscall handlers */ STD_ENTRY_LOCAL(_kernel_double_fault) - mfspr r1, EX_CONTEXT_1_0 + mfspr r1, SPR_EX_CONTEXT_K_0 move r2, lr move r3, sp move r4, r52 @@ -1518,34 +1523,29 @@ STD_ENTRY_LOCAL(_kernel_double_fault) STD_ENDPROC(_kernel_double_fault) STD_ENTRY_LOCAL(bad_intr) - mfspr r2, EX_CONTEXT_1_0 + mfspr r2, SPR_EX_CONTEXT_K_0 panic "Unhandled interrupt %#x: PC %#lx" STD_ENDPROC(bad_intr) /* Put address of pt_regs in reg and jump. */ #define PTREGS_SYSCALL(x, reg) \ - STD_ENTRY(x); \ + STD_ENTRY(_##x); \ { \ PTREGS_PTR(reg, PTREGS_OFFSET_BASE); \ - j _##x \ + j x \ }; \ - STD_ENDPROC(x) + STD_ENDPROC(_##x) PTREGS_SYSCALL(sys_execve, r3) PTREGS_SYSCALL(sys_sigaltstack, r2) PTREGS_SYSCALL(sys_rt_sigreturn, r0) +PTREGS_SYSCALL(sys_cmpxchg_badaddr, r1) -/* Save additional callee-saves to pt_regs, put address in reg and jump. */ -#define PTREGS_SYSCALL_ALL_REGS(x, reg) \ - STD_ENTRY(x); \ - push_extra_callee_saves reg; \ - j _##x; \ - STD_ENDPROC(x) - -PTREGS_SYSCALL_ALL_REGS(sys_fork, r0) -PTREGS_SYSCALL_ALL_REGS(sys_vfork, r0) -PTREGS_SYSCALL_ALL_REGS(sys_clone, r4) -PTREGS_SYSCALL_ALL_REGS(sys_cmpxchg_badaddr, r1) +/* Save additional callee-saves to pt_regs, put address in r4 and jump. */ +STD_ENTRY(_sys_clone) + push_extra_callee_saves r4 + j sys_clone + STD_ENDPROC(_sys_clone) /* * This entrypoint is taken for the cmpxchg and atomic_update fast @@ -1558,12 +1558,14 @@ PTREGS_SYSCALL_ALL_REGS(sys_cmpxchg_badaddr, r1) * to be available to it on entry. It does not modify any callee-save * registers (including "lr"). It does not check what PL it is being * called at, so you'd better not call it other than at PL0. + * The <atomic.h> wrapper assumes it only clobbers r20-r29, so if + * it ever is necessary to use more registers, be aware. * * It does not use the stack, but since it might be re-interrupted by * a page fault which would assume the stack was valid, it does * save/restore the stack pointer and zero it out to make sure it gets reset. * Since we always keep interrupts disabled, the hypervisor won't - * clobber our EX_CONTEXT_1_x registers, so we don't save/restore them + * clobber our EX_CONTEXT_K_x registers, so we don't save/restore them * (other than to advance the PC on return). * * We have to manually validate the user vs kernel address range @@ -1769,7 +1771,7 @@ ENTRY(sys_cmpxchg) /* Do slow mtspr here so the following "mf" waits less. */ { move sp, r27 - mtspr EX_CONTEXT_1_0, r28 + mtspr SPR_EX_CONTEXT_K_0, r28 } mf @@ -1788,7 +1790,7 @@ ENTRY(sys_cmpxchg) } { move sp, r27 - mtspr EX_CONTEXT_1_0, r28 + mtspr SPR_EX_CONTEXT_K_0, r28 } iret @@ -1816,7 +1818,7 @@ ENTRY(sys_cmpxchg) #endif /* Issue the slow SPR here while the tns result is in flight. */ - mfspr r28, EX_CONTEXT_1_0 + mfspr r28, SPR_EX_CONTEXT_K_0 { addi r28, r28, 8 /* return to the instruction after the swint1 */ @@ -1904,7 +1906,7 @@ ENTRY(sys_cmpxchg) .Lcmpxchg64_mismatch: { move sp, r27 - mtspr EX_CONTEXT_1_0, r28 + mtspr SPR_EX_CONTEXT_K_0, r28 } mf { @@ -1985,8 +1987,13 @@ int_unalign: int_hand INT_PERF_COUNT, PERF_COUNT, \ op_handle_perf_interrupt, handle_nmi int_hand INT_INTCTRL_3, INTCTRL_3, bad_intr +#if CONFIG_KERNEL_PL == 2 + dc_dispatch INT_INTCTRL_2, INTCTRL_2 + int_hand INT_INTCTRL_1, INTCTRL_1, bad_intr +#else int_hand INT_INTCTRL_2, INTCTRL_2, bad_intr dc_dispatch INT_INTCTRL_1, INTCTRL_1 +#endif int_hand INT_INTCTRL_0, INTCTRL_0, bad_intr int_hand INT_MESSAGE_RCV_DWNCL, MESSAGE_RCV_DWNCL, \ hv_message_intr, handle_interrupt_downcall diff --git a/arch/tile/kernel/irq.c b/arch/tile/kernel/irq.c index 9a27d563fc3..e63917687e9 100644 --- a/arch/tile/kernel/irq.c +++ b/arch/tile/kernel/irq.c @@ -61,9 +61,9 @@ static DEFINE_SPINLOCK(available_irqs_lock); #if CHIP_HAS_IPI() /* Use SPRs to manipulate device interrupts. */ -#define mask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_SET_1, irq_mask) -#define unmask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_RESET_1, irq_mask) -#define clear_irqs(irq_mask) __insn_mtspr(SPR_IPI_EVENT_RESET_1, irq_mask) +#define mask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_SET_K, irq_mask) +#define unmask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_RESET_K, irq_mask) +#define clear_irqs(irq_mask) __insn_mtspr(SPR_IPI_EVENT_RESET_K, irq_mask) #else /* Use HV to manipulate device interrupts. */ #define mask_irqs(irq_mask) hv_disable_intr(irq_mask) @@ -89,16 +89,16 @@ void tile_dev_intr(struct pt_regs *regs, int intnum) * masked by a previous interrupt. Then, mask out the ones * we're going to handle. */ - unsigned long masked = __insn_mfspr(SPR_IPI_MASK_1); - original_irqs = __insn_mfspr(SPR_IPI_EVENT_1) & ~masked; - __insn_mtspr(SPR_IPI_MASK_SET_1, original_irqs); + unsigned long masked = __insn_mfspr(SPR_IPI_MASK_K); + original_irqs = __insn_mfspr(SPR_IPI_EVENT_K) & ~masked; + __insn_mtspr(SPR_IPI_MASK_SET_K, original_irqs); #else /* * Hypervisor performs the equivalent of the Gx code above and * then puts the pending interrupt mask into a system save reg * for us to find. */ - original_irqs = __insn_mfspr(SPR_SYSTEM_SAVE_1_3); + original_irqs = __insn_mfspr(SPR_SYSTEM_SAVE_K_3); #endif remaining_irqs = original_irqs; @@ -225,7 +225,7 @@ void __cpuinit setup_irq_regs(void) /* Enable interrupt delivery. */ unmask_irqs(~0UL); #if CHIP_HAS_IPI() - raw_local_irq_unmask(INT_IPI_1); + raw_local_irq_unmask(INT_IPI_K); #endif } diff --git a/arch/tile/kernel/messaging.c b/arch/tile/kernel/messaging.c index 6d23ed271d1..997e3933f72 100644 --- a/arch/tile/kernel/messaging.c +++ b/arch/tile/kernel/messaging.c @@ -34,7 +34,7 @@ void __cpuinit init_messaging(void) panic("hv_register_message_state: error %d", rc); /* Make sure downcall interrupts will be enabled. */ - raw_local_irq_unmask(INT_INTCTRL_1); + raw_local_irq_unmask(INT_INTCTRL_K); } void hv_message_intr(struct pt_regs *regs, int intnum) diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c index 84c29111756..8430f45daea 100644 --- a/arch/tile/kernel/process.c +++ b/arch/tile/kernel/process.c @@ -214,9 +214,10 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, /* * Copy the callee-saved registers from the passed pt_regs struct * into the context-switch callee-saved registers area. - * We have to restore the callee-saved registers since we may - * be cloning a userspace task with userspace register state, - * and we won't be unwinding the same kernel frames to restore them. + * This way when we start the interrupt-return sequence, the + * callee-save registers will be correctly in registers, which + * is how we assume the compiler leaves them as we start doing + * the normal return-from-interrupt path after calling C code. * Zero out the C ABI save area to mark the top of the stack. */ ksp = (unsigned long) childregs; @@ -304,15 +305,25 @@ int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs) /* Allow user processes to access the DMA SPRs */ void grant_dma_mpls(void) { +#if CONFIG_KERNEL_PL == 2 + __insn_mtspr(SPR_MPL_DMA_CPL_SET_1, 1); + __insn_mtspr(SPR_MPL_DMA_NOTIFY_SET_1, 1); +#else __insn_mtspr(SPR_MPL_DMA_CPL_SET_0, 1); __insn_mtspr(SPR_MPL_DMA_NOTIFY_SET_0, 1); +#endif } /* Forbid user processes from accessing the DMA SPRs */ void restrict_dma_mpls(void) { +#if CONFIG_KERNEL_PL == 2 + __insn_mtspr(SPR_MPL_DMA_CPL_SET_2, 1); + __insn_mtspr(SPR_MPL_DMA_NOTIFY_SET_2, 1); +#else __insn_mtspr(SPR_MPL_DMA_CPL_SET_1, 1); __insn_mtspr(SPR_MPL_DMA_NOTIFY_SET_1, 1); +#endif } /* Pause the DMA engine, then save off its state registers. */ @@ -523,19 +534,14 @@ struct task_struct *__sched _switch_to(struct task_struct *prev, * Switch kernel SP, PC, and callee-saved registers. * In the context of the new task, return the old task pointer * (i.e. the task that actually called __switch_to). - * Pass the value to use for SYSTEM_SAVE_1_0 when we reset our sp. + * Pass the value to use for SYSTEM_SAVE_K_0 when we reset our sp. */ return __switch_to(prev, next, next_current_ksp0(next)); } -long _sys_fork(struct pt_regs *regs) -{ - return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL); -} - -long _sys_clone(unsigned long clone_flags, unsigned long newsp, - void __user *parent_tidptr, void __user *child_tidptr, - struct pt_regs *regs) +SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp, + void __user *, parent_tidptr, void __user *, child_tidptr, + struct pt_regs *, regs) { if (!newsp) newsp = regs->sp; @@ -543,18 +549,13 @@ long _sys_clone(unsigned long clone_flags, unsigned long newsp, parent_tidptr, child_tidptr); } -long _sys_vfork(struct pt_regs *regs) -{ - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp, - regs, 0, NULL, NULL); -} - /* * sys_execve() executes a new program. */ -long _sys_execve(const char __user *path, - const char __user *const __user *argv, - const char __user *const __user *envp, struct pt_regs *regs) +SYSCALL_DEFINE4(execve, const char __user *, path, + const char __user *const __user *, argv, + const char __user *const __user *, envp, + struct pt_regs *, regs) { long error; char *filename; @@ -570,9 +571,10 @@ out: } #ifdef CONFIG_COMPAT -long _compat_sys_execve(const char __user *path, - const compat_uptr_t __user *argv, - const compat_uptr_t __user *envp, struct pt_regs *regs) +long compat_sys_execve(const char __user *path, + const compat_uptr_t __user *argv, + const compat_uptr_t __user *envp, + struct pt_regs *regs) { long error; char *filename; diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c index 7161bd03d2f..5b20c2874d5 100644 --- a/arch/tile/kernel/ptrace.c +++ b/arch/tile/kernel/ptrace.c @@ -32,25 +32,6 @@ void user_disable_single_step(struct task_struct *child) } /* - * This routine will put a word on the process's privileged stack. - */ -static void putreg(struct task_struct *task, - unsigned long addr, unsigned long value) -{ - unsigned int regno = addr / sizeof(unsigned long); - struct pt_regs *childregs = task_pt_regs(task); - childregs->regs[regno] = value; - childregs->flags |= PT_FLAGS_RESTORE_REGS; -} - -static unsigned long getreg(struct task_struct *task, unsigned long addr) -{ - unsigned int regno = addr / sizeof(unsigned long); - struct pt_regs *childregs = task_pt_regs(task); - return childregs->regs[regno]; -} - -/* * Called by kernel/ptrace.c when detaching.. */ void ptrace_disable(struct task_struct *child) @@ -66,59 +47,72 @@ void ptrace_disable(struct task_struct *child) long arch_ptrace(struct task_struct *child, long request, long addr, long data) { - unsigned long __user *datap; + unsigned long __user *datap = (long __user __force *)data; unsigned long tmp; int i; long ret = -EIO; - -#ifdef CONFIG_COMPAT - if (task_thread_info(current)->status & TS_COMPAT) - data = (u32)data; - if (task_thread_info(child)->status & TS_COMPAT) - addr = (u32)addr; -#endif - datap = (unsigned long __user __force *)data; + unsigned long *childregs; + char *childreg; switch (request) { case PTRACE_PEEKUSR: /* Read register from pt_regs. */ - if (addr & (sizeof(data)-1)) - break; if (addr < 0 || addr >= PTREGS_SIZE) break; - tmp = getreg(child, addr); /* Read register */ - ret = put_user(tmp, datap); + childreg = (char *)task_pt_regs(child) + addr; +#ifdef CONFIG_COMPAT + if (is_compat_task()) { + if (addr & (sizeof(compat_long_t)-1)) + break; + ret = put_user(*(compat_long_t *)childreg, + (compat_long_t __user *)datap); + } else +#endif + { + if (addr & (sizeof(long)-1)) + break; + ret = put_user(*(long *)childreg, datap); + } break; case PTRACE_POKEUSR: /* Write register in pt_regs. */ - if (addr & (sizeof(data)-1)) - break; if (addr < 0 || addr >= PTREGS_SIZE) break; - putreg(child, addr, data); /* Write register */ + childreg = (char *)task_pt_regs(child) + addr; +#ifdef CONFIG_COMPAT + if (is_compat_task()) { + if (addr & (sizeof(compat_long_t)-1)) + break; + *(compat_long_t *)childreg = data; + } else +#endif + { + if (addr & (sizeof(long)-1)) + break; + *(long *)childreg = data; + } ret = 0; break; case PTRACE_GETREGS: /* Get all registers from the child. */ if (!access_ok(VERIFY_WRITE, datap, PTREGS_SIZE)) break; - for (i = 0; i < PTREGS_SIZE; i += sizeof(long)) { - ret = __put_user(getreg(child, i), datap); + childregs = (long *)task_pt_regs(child); + for (i = 0; i < sizeof(struct pt_regs)/sizeof(long); ++i) { + ret = __put_user(childregs[i], &datap[i]); if (ret != 0) break; - datap++; } break; case PTRACE_SETREGS: /* Set all registers in the child. */ if (!access_ok(VERIFY_READ, datap, PTREGS_SIZE)) break; - for (i = 0; i < PTREGS_SIZE; i += sizeof(long)) { - ret = __get_user(tmp, datap); + childregs = (long *)task_pt_regs(child); + for (i = 0; i < sizeof(struct pt_regs)/sizeof(long); ++i) { + ret = __get_user(childregs[i], &datap[i]); if (ret != 0) break; - putreg(child, i, tmp); - datap++; } break; diff --git a/arch/tile/kernel/regs_32.S b/arch/tile/kernel/regs_32.S index e88d6e12278..caa13101c26 100644 --- a/arch/tile/kernel/regs_32.S +++ b/arch/tile/kernel/regs_32.S @@ -85,7 +85,7 @@ STD_ENTRY_SECTION(__switch_to, .sched.text) { /* Update sp and ksp0 simultaneously to avoid backtracer warnings. */ move sp, r13 - mtspr SYSTEM_SAVE_1_0, r2 + mtspr SPR_SYSTEM_SAVE_K_0, r2 } FOR_EACH_CALLEE_SAVED_REG(LOAD_REG) .L__switch_to_pc: diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c index e7d54c73d5c..f3a50e74f9a 100644 --- a/arch/tile/kernel/setup.c +++ b/arch/tile/kernel/setup.c @@ -187,11 +187,11 @@ early_param("vmalloc", parse_vmalloc); #ifdef CONFIG_HIGHMEM /* - * Determine for each controller where its lowmem is mapped and how - * much of it is mapped there. On controller zero, the first few - * megabytes are mapped at 0xfd000000 as code, so in principle we - * could start our data mappings higher up, but for now we don't - * bother, to avoid additional confusion. + * Determine for each controller where its lowmem is mapped and how much of + * it is mapped there. On controller zero, the first few megabytes are + * already mapped in as code at MEM_SV_INTRPT, so in principle we could + * start our data mappings higher up, but for now we don't bother, to avoid + * additional confusion. * * One question is whether, on systems with more than 768 Mb and * controllers of different sizes, to map in a proportionate amount of @@ -311,7 +311,7 @@ static void __init setup_memory(void) #endif /* We are using a char to hold the cpu_2_node[] mapping */ - BUG_ON(MAX_NUMNODES > 127); + BUILD_BUG_ON(MAX_NUMNODES > 127); /* Discover the ranges of memory available to us */ for (i = 0; ; ++i) { @@ -876,6 +876,9 @@ void __cpuinit setup_cpu(int boot) #if CHIP_HAS_SN_PROC() raw_local_irq_unmask(INT_SNITLB_MISS); #endif +#ifdef __tilegx__ + raw_local_irq_unmask(INT_SINGLE_STEP_K); +#endif /* * Allow user access to many generic SPRs, like the cycle @@ -893,11 +896,12 @@ void __cpuinit setup_cpu(int boot) #endif /* - * Set the MPL for interrupt control 0 to user level. - * This includes access to the SYSTEM_SAVE and EX_CONTEXT SPRs, - * as well as the PL 0 interrupt mask. + * Set the MPL for interrupt control 0 & 1 to the corresponding + * values. This includes access to the SYSTEM_SAVE and EX_CONTEXT + * SPRs, as well as the interrupt mask. */ __insn_mtspr(SPR_MPL_INTCTRL_0_SET_0, 1); + __insn_mtspr(SPR_MPL_INTCTRL_1_SET_1, 1); /* Initialize IRQ support for this cpu. */ setup_irq_regs(); @@ -1033,7 +1037,7 @@ static void __init validate_va(void) * In addition, make sure we CAN'T use the end of memory, since * we use the last chunk of each pgd for the pgd_list. */ - int i, fc_fd_ok = 0; + int i, user_kernel_ok = 0; unsigned long max_va = 0; unsigned long list_va = ((PGD_LIST_OFFSET / sizeof(pgd_t)) << PGDIR_SHIFT); @@ -1044,13 +1048,13 @@ static void __init validate_va(void) break; if (range.start <= MEM_USER_INTRPT && range.start + range.size >= MEM_HV_INTRPT) - fc_fd_ok = 1; + user_kernel_ok = 1; if (range.start == 0) max_va = range.size; BUG_ON(range.start + range.size > list_va); } - if (!fc_fd_ok) - early_panic("Hypervisor not configured for VAs 0xfc/0xfd\n"); + if (!user_kernel_ok) + early_panic("Hypervisor not configured for user/kernel VAs\n"); if (max_va == 0) early_panic("Hypervisor not configured for low VAs\n"); if (max_va < KERNEL_HIGH_VADDR) @@ -1334,6 +1338,10 @@ static void __init pcpu_fc_populate_pte(unsigned long addr) pte_t *pte; BUG_ON(pgd_addr_invalid(addr)); + if (addr < VMALLOC_START || addr >= VMALLOC_END) + panic("PCPU addr %#lx outside vmalloc range %#lx..%#lx;" + " try increasing CONFIG_VMALLOC_RESERVE\n", + addr, VMALLOC_START, VMALLOC_END); pgd = swapper_pg_dir + pgd_index(addr); pud = pud_offset(pgd, addr); diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c index ce183aa1492..fb28e85ae3a 100644 --- a/arch/tile/kernel/signal.c +++ b/arch/tile/kernel/signal.c @@ -41,8 +41,8 @@ #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) -long _sys_sigaltstack(const stack_t __user *uss, - stack_t __user *uoss, struct pt_regs *regs) +SYSCALL_DEFINE3(sigaltstack, const stack_t __user *, uss, + stack_t __user *, uoss, struct pt_regs *, regs) { return do_sigaltstack(uss, uoss, regs->sp); } @@ -78,7 +78,7 @@ int restore_sigcontext(struct pt_regs *regs, } /* sigreturn() returns long since it restores r0 in the interrupted code. */ -long _sys_rt_sigreturn(struct pt_regs *regs) +SYSCALL_DEFINE1(rt_sigreturn, struct pt_regs *, regs) { struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(regs->sp); diff --git a/arch/tile/kernel/single_step.c b/arch/tile/kernel/single_step.c index 5ec4b9c651f..1eb3b39e36c 100644 --- a/arch/tile/kernel/single_step.c +++ b/arch/tile/kernel/single_step.c @@ -15,7 +15,7 @@ * Derived from iLib's single-stepping code. */ -#ifndef __tilegx__ /* No support for single-step yet. */ +#ifndef __tilegx__ /* Hardware support for single step unavailable. */ /* These functions are only used on the TILE platform */ #include <linux/slab.h> @@ -660,4 +660,75 @@ void single_step_once(struct pt_regs *regs) regs->pc += 8; } +#else +#include <linux/smp.h> +#include <linux/ptrace.h> +#include <arch/spr_def.h> + +static DEFINE_PER_CPU(unsigned long, ss_saved_pc); + + +/* + * Called directly on the occasion of an interrupt. + * + * If the process doesn't have single step set, then we use this as an + * opportunity to turn single step off. + * + * It has been mentioned that we could conditionally turn off single stepping + * on each entry into the kernel and rely on single_step_once to turn it + * on for the processes that matter (as we already do), but this + * implementation is somewhat more efficient in that we muck with registers + * once on a bum interrupt rather than on every entry into the kernel. + * + * If SINGLE_STEP_CONTROL_K has CANCELED set, then an interrupt occurred, + * so we have to run through this process again before we can say that an + * instruction has executed. + * + * swint will set CANCELED, but it's a legitimate instruction. Fortunately + * it changes the PC. If it hasn't changed, then we know that the interrupt + * wasn't generated by swint and we'll need to run this process again before + * we can say an instruction has executed. + * + * If either CANCELED == 0 or the PC's changed, we send out SIGTRAPs and get + * on with our lives. + */ + +void gx_singlestep_handle(struct pt_regs *regs, int fault_num) +{ + unsigned long *ss_pc = &__get_cpu_var(ss_saved_pc); + struct thread_info *info = (void *)current_thread_info(); + int is_single_step = test_ti_thread_flag(info, TIF_SINGLESTEP); + unsigned long control = __insn_mfspr(SPR_SINGLE_STEP_CONTROL_K); + + if (is_single_step == 0) { + __insn_mtspr(SPR_SINGLE_STEP_EN_K_K, 0); + + } else if ((*ss_pc != regs->pc) || + (!(control & SPR_SINGLE_STEP_CONTROL_1__CANCELED_MASK))) { + + ptrace_notify(SIGTRAP); + control |= SPR_SINGLE_STEP_CONTROL_1__CANCELED_MASK; + control |= SPR_SINGLE_STEP_CONTROL_1__INHIBIT_MASK; + __insn_mtspr(SPR_SINGLE_STEP_CONTROL_K, control); + } +} + + +/* + * Called from need_singlestep. Set up the control registers and the enable + * register, then return back. + */ + +void single_step_once(struct pt_regs *regs) +{ + unsigned long *ss_pc = &__get_cpu_var(ss_saved_pc); + unsigned long control = __insn_mfspr(SPR_SINGLE_STEP_CONTROL_K); + + *ss_pc = regs->pc; + control |= SPR_SINGLE_STEP_CONTROL_1__CANCELED_MASK; + control |= SPR_SINGLE_STEP_CONTROL_1__INHIBIT_MASK; + __insn_mtspr(SPR_SINGLE_STEP_CONTROL_K, control); + __insn_mtspr(SPR_SINGLE_STEP_EN_K_K, 1 << USER_PL); +} + #endif /* !__tilegx__ */ diff --git a/arch/tile/kernel/smp.c b/arch/tile/kernel/smp.c index 1cb5ec79de0..75255d90aff 100644 --- a/arch/tile/kernel/smp.c +++ b/arch/tile/kernel/smp.c @@ -212,7 +212,7 @@ void __init ipi_init(void) tile.x = cpu_x(cpu); tile.y = cpu_y(cpu); - if (hv_get_ipi_pte(tile, 1, &pte) != 0) + if (hv_get_ipi_pte(tile, KERNEL_PL, &pte) != 0) panic("Failed to initialize IPI for cpu %d\n", cpu); offset = hv_pte_get_pfn(pte) << PAGE_SHIFT; diff --git a/arch/tile/kernel/stack.c b/arch/tile/kernel/stack.c index ea2e0ce2838..0d54106be3d 100644 --- a/arch/tile/kernel/stack.c +++ b/arch/tile/kernel/stack.c @@ -30,6 +30,10 @@ #include <arch/abi.h> #include <arch/interrupts.h> +#define KBT_ONGOING 0 /* Backtrace still ongoing */ +#define KBT_DONE 1 /* Backtrace cleanly completed */ +#define KBT_RUNNING 2 /* Can't run backtrace on a running task */ +#define KBT_LOOP 3 /* Backtrace entered a loop */ /* Is address on the specified kernel stack? */ static int in_kernel_stack(struct KBacktraceIterator *kbt, VirtualAddress sp) @@ -207,11 +211,11 @@ static int KBacktraceIterator_next_item_inclusive( for (;;) { do { if (!KBacktraceIterator_is_sigreturn(kbt)) - return 1; + return KBT_ONGOING; } while (backtrace_next(&kbt->it)); if (!KBacktraceIterator_restart(kbt)) - return 0; + return KBT_DONE; } } @@ -264,7 +268,7 @@ void KBacktraceIterator_init(struct KBacktraceIterator *kbt, kbt->pgtable = NULL; kbt->verbose = 0; /* override in caller if desired */ kbt->profile = 0; /* override in caller if desired */ - kbt->end = 0; + kbt->end = KBT_ONGOING; kbt->new_context = 0; if (is_current) { HV_PhysAddr pgdir_pa = hv_inquire_context().page_table; @@ -290,7 +294,7 @@ void KBacktraceIterator_init(struct KBacktraceIterator *kbt, if (regs == NULL) { if (is_current || t->state == TASK_RUNNING) { /* Can't do this; we need registers */ - kbt->end = 1; + kbt->end = KBT_RUNNING; return; } pc = get_switch_to_pc(); @@ -305,26 +309,29 @@ void KBacktraceIterator_init(struct KBacktraceIterator *kbt, } backtrace_init(&kbt->it, read_memory_func, kbt, pc, lr, sp, r52); - kbt->end = !KBacktraceIterator_next_item_inclusive(kbt); + kbt->end = KBacktraceIterator_next_item_inclusive(kbt); } EXPORT_SYMBOL(KBacktraceIterator_init); int KBacktraceIterator_end(struct KBacktraceIterator *kbt) { - return kbt->end; + return kbt->end != KBT_ONGOING; } EXPORT_SYMBOL(KBacktraceIterator_end); void KBacktraceIterator_next(struct KBacktraceIterator *kbt) { + VirtualAddress old_pc = kbt->it.pc, old_sp = kbt->it.sp; kbt->new_context = 0; - if (!backtrace_next(&kbt->it) && - !KBacktraceIterator_restart(kbt)) { - kbt->end = 1; - return; - } - - kbt->end = !KBacktraceIterator_next_item_inclusive(kbt); + if (!backtrace_next(&kbt->it) && !KBacktraceIterator_restart(kbt)) { + kbt->end = KBT_DONE; + return; + } + kbt->end = KBacktraceIterator_next_item_inclusive(kbt); + if (old_pc == kbt->it.pc && old_sp == kbt->it.sp) { + /* Trapped in a loop; give up. */ + kbt->end = KBT_LOOP; + } } EXPORT_SYMBOL(KBacktraceIterator_next); @@ -387,6 +394,8 @@ void tile_show_stack(struct KBacktraceIterator *kbt, int headers) break; } } + if (kbt->end == KBT_LOOP) + pr_err("Stack dump stopped; next frame identical to this one\n"); if (headers) pr_err("Stack dump complete\n"); } diff --git a/arch/tile/kernel/sys.c b/arch/tile/kernel/sys.c index f0f87eab8c3..7e764669a02 100644 --- a/arch/tile/kernel/sys.c +++ b/arch/tile/kernel/sys.c @@ -110,6 +110,15 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, #define sys_sync_file_range sys_sync_file_range2 #endif +/* Call the trampolines to manage pt_regs where necessary. */ +#define sys_execve _sys_execve +#define sys_sigaltstack _sys_sigaltstack +#define sys_rt_sigreturn _sys_rt_sigreturn +#define sys_clone _sys_clone +#ifndef __tilegx__ +#define sys_cmpxchg_badaddr _sys_cmpxchg_badaddr +#endif + /* * Note that we can't include <linux/unistd.h> here since the header * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. diff --git a/arch/tile/kernel/traps.c b/arch/tile/kernel/traps.c index 0f362dc2c57..5474fc2e77e 100644 --- a/arch/tile/kernel/traps.c +++ b/arch/tile/kernel/traps.c @@ -260,7 +260,7 @@ void __kprobes do_trap(struct pt_regs *regs, int fault_num, address = regs->pc; break; case INT_UNALIGN_DATA: -#ifndef __tilegx__ /* FIXME: GX: no single-step yet */ +#ifndef __tilegx__ /* Emulated support for single step debugging */ if (unaligned_fixup >= 0) { struct single_step_state *state = current_thread_info()->step_state; @@ -278,7 +278,7 @@ void __kprobes do_trap(struct pt_regs *regs, int fault_num, case INT_DOUBLE_FAULT: /* * For double fault, "reason" is actually passed as - * SYSTEM_SAVE_1_2, the hypervisor's double-fault info, so + * SYSTEM_SAVE_K_2, the hypervisor's double-fault info, so * we can provide the original fault number rather than * the uninteresting "INT_DOUBLE_FAULT" so the user can * learn what actually struck while PL0 ICS was set. diff --git a/arch/tile/kvm/Kconfig b/arch/tile/kvm/Kconfig new file mode 100644 index 00000000000..b88f9c04778 --- /dev/null +++ b/arch/tile/kvm/Kconfig @@ -0,0 +1,38 @@ +# +# KVM configuration +# + +source "virt/kvm/Kconfig" + +menuconfig VIRTUALIZATION + bool "Virtualization" + ---help--- + Say Y here to get to see options for using your Linux host to run + other operating systems inside virtual machines (guests). + This option alone does not add any kernel code. + + If you say N, all options in this submenu will be skipped and + disabled. + +if VIRTUALIZATION + +config KVM + tristate "Kernel-based Virtual Machine (KVM) support" + depends on HAVE_KVM && MODULES && EXPERIMENTAL + select PREEMPT_NOTIFIERS + select ANON_INODES + ---help--- + Support hosting paravirtualized guest machines. + + This module provides access to the hardware capabilities through + a character device node named /dev/kvm. + + To compile this as a module, choose M here: the module + will be called kvm. + + If unsure, say N. + +source drivers/vhost/Kconfig +source drivers/virtio/Kconfig + +endif # VIRTUALIZATION diff --git a/arch/tile/lib/Makefile b/arch/tile/lib/Makefile index 746dc81ed3c..93122d5b155 100644 --- a/arch/tile/lib/Makefile +++ b/arch/tile/lib/Makefile @@ -3,8 +3,8 @@ # lib-y = cacheflush.o checksum.o cpumask.o delay.o \ - mb_incoherent.o uaccess.o \ - memcpy_$(BITS).o memchr_$(BITS).o memmove_$(BITS).o memset_$(BITS).o \ + mb_incoherent.o uaccess.o memmove.o \ + memcpy_$(BITS).o memchr_$(BITS).o memset_$(BITS).o \ strchr_$(BITS).o strlen_$(BITS).o ifeq ($(CONFIG_TILEGX),y) diff --git a/arch/tile/lib/atomic_32.c b/arch/tile/lib/atomic_32.c index 8040b42a8ee..7a5cc706ab6 100644 --- a/arch/tile/lib/atomic_32.c +++ b/arch/tile/lib/atomic_32.c @@ -300,7 +300,7 @@ void __init __init_atomic_per_cpu(void) #else /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */ /* Validate power-of-two and "bigger than cpus" assumption */ - BUG_ON(ATOMIC_HASH_SIZE & (ATOMIC_HASH_SIZE-1)); + BUILD_BUG_ON(ATOMIC_HASH_SIZE & (ATOMIC_HASH_SIZE-1)); BUG_ON(ATOMIC_HASH_SIZE < nr_cpu_ids); /* @@ -314,17 +314,17 @@ void __init __init_atomic_per_cpu(void) BUG_ON((unsigned long)atomic_locks % PAGE_SIZE != 0); /* The locks must all fit on one page. */ - BUG_ON(ATOMIC_HASH_SIZE * sizeof(int) > PAGE_SIZE); + BUILD_BUG_ON(ATOMIC_HASH_SIZE * sizeof(int) > PAGE_SIZE); /* * We use the page offset of the atomic value's address as * an index into atomic_locks, excluding the low 3 bits. * That should not produce more indices than ATOMIC_HASH_SIZE. */ - BUG_ON((PAGE_SIZE >> 3) > ATOMIC_HASH_SIZE); + BUILD_BUG_ON((PAGE_SIZE >> 3) > ATOMIC_HASH_SIZE); #endif /* ATOMIC_LOCKS_FOUND_VIA_TABLE() */ /* The futex code makes this assumption, so we validate it here. */ - BUG_ON(sizeof(atomic_t) != sizeof(int)); + BUILD_BUG_ON(sizeof(atomic_t) != sizeof(int)); } diff --git a/arch/tile/lib/exports.c b/arch/tile/lib/exports.c index ce5dbf56578..1509c559765 100644 --- a/arch/tile/lib/exports.c +++ b/arch/tile/lib/exports.c @@ -45,6 +45,9 @@ EXPORT_SYMBOL(__copy_from_user_zeroing); EXPORT_SYMBOL(__copy_in_user_inatomic); #endif +/* arch/tile/lib/mb_incoherent.S */ +EXPORT_SYMBOL(__mb_incoherent); + /* hypervisor glue */ #include <hv/hypervisor.h> EXPORT_SYMBOL(hv_dev_open); diff --git a/arch/tile/lib/memcpy_32.S b/arch/tile/lib/memcpy_32.S index 30c3b7ebb55..2a419a6122d 100644 --- a/arch/tile/lib/memcpy_32.S +++ b/arch/tile/lib/memcpy_32.S @@ -10,14 +10,16 @@ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for * more details. - * - * This file shares the implementation of the userspace memcpy and - * the kernel's memcpy, copy_to_user and copy_from_user. */ #include <arch/chip.h> +/* + * This file shares the implementation of the userspace memcpy and + * the kernel's memcpy, copy_to_user and copy_from_user. + */ + #include <linux/linkage.h> /* On TILE64, we wrap these functions via arch/tile/lib/memcpy_tile64.c */ @@ -53,9 +55,9 @@ */ ENTRY(__copy_from_user_inatomic) .type __copy_from_user_inatomic, @function - FEEDBACK_ENTER_EXPLICIT(__copy_from_user_inatomic, \ + FEEDBACK_ENTER_EXPLICIT(__copy_from_user_inatomic, \ .text.memcpy_common, \ - .Lend_memcpy_common - __copy_from_user_inatomic) + .Lend_memcpy_common - __copy_from_user_inatomic) { movei r29, IS_COPY_FROM_USER; j memcpy_common } .size __copy_from_user_inatomic, . - __copy_from_user_inatomic @@ -64,7 +66,7 @@ ENTRY(__copy_from_user_inatomic) */ ENTRY(__copy_from_user_zeroing) .type __copy_from_user_zeroing, @function - FEEDBACK_REENTER(__copy_from_user_inatomic) + FEEDBACK_REENTER(__copy_from_user_inatomic) { movei r29, IS_COPY_FROM_USER_ZEROING; j memcpy_common } .size __copy_from_user_zeroing, . - __copy_from_user_zeroing @@ -74,13 +76,13 @@ ENTRY(__copy_from_user_zeroing) */ ENTRY(__copy_to_user_inatomic) .type __copy_to_user_inatomic, @function - FEEDBACK_REENTER(__copy_from_user_inatomic) + FEEDBACK_REENTER(__copy_from_user_inatomic) { movei r29, IS_COPY_TO_USER; j memcpy_common } .size __copy_to_user_inatomic, . - __copy_to_user_inatomic ENTRY(memcpy) .type memcpy, @function - FEEDBACK_REENTER(__copy_from_user_inatomic) + FEEDBACK_REENTER(__copy_from_user_inatomic) { movei r29, IS_MEMCPY } .size memcpy, . - memcpy /* Fall through */ @@ -157,35 +159,35 @@ EX: { sw r0, r3; addi r0, r0, 4; addi r2, r2, -4 } { addi r3, r1, 60; andi r9, r9, -64 } #if CHIP_HAS_WH64() - /* No need to prefetch dst, we'll just do the wh64 - * right before we copy a line. + /* No need to prefetch dst, we'll just do the wh64 + * right before we copy a line. */ #endif EX: { lw r5, r3; addi r3, r3, 64; movei r4, 1 } - /* Intentionally stall for a few cycles to leave L2 cache alone. */ - { bnzt zero, .; move r27, lr } + /* Intentionally stall for a few cycles to leave L2 cache alone. */ + { bnzt zero, .; move r27, lr } EX: { lw r6, r3; addi r3, r3, 64 } - /* Intentionally stall for a few cycles to leave L2 cache alone. */ - { bnzt zero, . } + /* Intentionally stall for a few cycles to leave L2 cache alone. */ + { bnzt zero, . } EX: { lw r7, r3; addi r3, r3, 64 } #if !CHIP_HAS_WH64() - /* Prefetch the dest */ - /* Intentionally stall for a few cycles to leave L2 cache alone. */ - { bnzt zero, . } - /* Use a real load to cause a TLB miss if necessary. We aren't using - * r28, so this should be fine. - */ + /* Prefetch the dest */ + /* Intentionally stall for a few cycles to leave L2 cache alone. */ + { bnzt zero, . } + /* Use a real load to cause a TLB miss if necessary. We aren't using + * r28, so this should be fine. + */ EX: { lw r28, r9; addi r9, r9, 64 } - /* Intentionally stall for a few cycles to leave L2 cache alone. */ - { bnzt zero, . } - { prefetch r9; addi r9, r9, 64 } - /* Intentionally stall for a few cycles to leave L2 cache alone. */ - { bnzt zero, . } - { prefetch r9; addi r9, r9, 64 } + /* Intentionally stall for a few cycles to leave L2 cache alone. */ + { bnzt zero, . } + { prefetch r9; addi r9, r9, 64 } + /* Intentionally stall for a few cycles to leave L2 cache alone. */ + { bnzt zero, . } + { prefetch r9; addi r9, r9, 64 } #endif - /* Intentionally stall for a few cycles to leave L2 cache alone. */ - { bz zero, .Lbig_loop2 } + /* Intentionally stall for a few cycles to leave L2 cache alone. */ + { bz zero, .Lbig_loop2 } /* On entry to this loop: * - r0 points to the start of dst line 0 @@ -197,7 +199,7 @@ EX: { lw r28, r9; addi r9, r9, 64 } * to some "safe" recently loaded address. * - r5 contains *(r1 + 60) [i.e. last word of source line 0] * - r6 contains *(r1 + 64 + 60) [i.e. last word of source line 1] - * - r9 contains ((r0 + 63) & -64) + * - r9 contains ((r0 + 63) & -64) * [start of next dst cache line.] */ @@ -208,137 +210,137 @@ EX: { lw r28, r9; addi r9, r9, 64 } /* Copy line 0, first stalling until r5 is ready. */ EX: { move r12, r5; lw r16, r1 } { bz r4, .Lcopy_8_check; slti_u r8, r2, 8 } - /* Prefetch several lines ahead. */ + /* Prefetch several lines ahead. */ EX: { lw r5, r3; addi r3, r3, 64 } - { jal .Lcopy_line } + { jal .Lcopy_line } /* Copy line 1, first stalling until r6 is ready. */ EX: { move r12, r6; lw r16, r1 } { bz r4, .Lcopy_8_check; slti_u r8, r2, 8 } - /* Prefetch several lines ahead. */ + /* Prefetch several lines ahead. */ EX: { lw r6, r3; addi r3, r3, 64 } { jal .Lcopy_line } /* Copy line 2, first stalling until r7 is ready. */ EX: { move r12, r7; lw r16, r1 } { bz r4, .Lcopy_8_check; slti_u r8, r2, 8 } - /* Prefetch several lines ahead. */ + /* Prefetch several lines ahead. */ EX: { lw r7, r3; addi r3, r3, 64 } - /* Use up a caches-busy cycle by jumping back to the top of the - * loop. Might as well get it out of the way now. - */ - { j .Lbig_loop } + /* Use up a caches-busy cycle by jumping back to the top of the + * loop. Might as well get it out of the way now. + */ + { j .Lbig_loop } /* On entry: * - r0 points to the destination line. * - r1 points to the source line. - * - r3 is the next prefetch address. + * - r3 is the next prefetch address. * - r9 holds the last address used for wh64. * - r12 = WORD_15 - * - r16 = WORD_0. - * - r17 == r1 + 16. - * - r27 holds saved lr to restore. + * - r16 = WORD_0. + * - r17 == r1 + 16. + * - r27 holds saved lr to restore. * * On exit: * - r0 is incremented by 64. * - r1 is incremented by 64, unless that would point to a word - * beyond the end of the source array, in which case it is redirected - * to point to an arbitrary word already in the cache. + * beyond the end of the source array, in which case it is redirected + * to point to an arbitrary word already in the cache. * - r2 is decremented by 64. - * - r3 is unchanged, unless it points to a word beyond the - * end of the source array, in which case it is redirected - * to point to an arbitrary word already in the cache. - * Redirecting is OK since if we are that close to the end - * of the array we will not come back to this subroutine - * and use the contents of the prefetched address. + * - r3 is unchanged, unless it points to a word beyond the + * end of the source array, in which case it is redirected + * to point to an arbitrary word already in the cache. + * Redirecting is OK since if we are that close to the end + * of the array we will not come back to this subroutine + * and use the contents of the prefetched address. * - r4 is nonzero iff r2 >= 64. - * - r9 is incremented by 64, unless it points beyond the - * end of the last full destination cache line, in which - * case it is redirected to a "safe address" that can be - * clobbered (sp - 64) + * - r9 is incremented by 64, unless it points beyond the + * end of the last full destination cache line, in which + * case it is redirected to a "safe address" that can be + * clobbered (sp - 64) * - lr contains the value in r27. */ /* r26 unused */ .Lcopy_line: - /* TODO: when r3 goes past the end, we would like to redirect it - * to prefetch the last partial cache line (if any) just once, for the - * benefit of the final cleanup loop. But we don't want to - * prefetch that line more than once, or subsequent prefetches - * will go into the RTF. But then .Lbig_loop should unconditionally - * branch to top of loop to execute final prefetch, and its - * nop should become a conditional branch. - */ - - /* We need two non-memory cycles here to cover the resources - * used by the loads initiated by the caller. - */ - { add r15, r1, r2 } + /* TODO: when r3 goes past the end, we would like to redirect it + * to prefetch the last partial cache line (if any) just once, for the + * benefit of the final cleanup loop. But we don't want to + * prefetch that line more than once, or subsequent prefetches + * will go into the RTF. But then .Lbig_loop should unconditionally + * branch to top of loop to execute final prefetch, and its + * nop should become a conditional branch. + */ + + /* We need two non-memory cycles here to cover the resources + * used by the loads initiated by the caller. + */ + { add r15, r1, r2 } .Lcopy_line2: - { slt_u r13, r3, r15; addi r17, r1, 16 } + { slt_u r13, r3, r15; addi r17, r1, 16 } - /* NOTE: this will stall for one cycle as L1 is busy. */ + /* NOTE: this will stall for one cycle as L1 is busy. */ - /* Fill second L1D line. */ + /* Fill second L1D line. */ EX: { lw r17, r17; addi r1, r1, 48; mvz r3, r13, r1 } /* r17 = WORD_4 */ #if CHIP_HAS_WH64() - /* Prepare destination line for writing. */ + /* Prepare destination line for writing. */ EX: { wh64 r9; addi r9, r9, 64 } #else - /* Prefetch dest line */ + /* Prefetch dest line */ { prefetch r9; addi r9, r9, 64 } #endif - /* Load seven words that are L1D hits to cover wh64 L2 usage. */ + /* Load seven words that are L1D hits to cover wh64 L2 usage. */ - /* Load the three remaining words from the last L1D line, which - * we know has already filled the L1D. - */ + /* Load the three remaining words from the last L1D line, which + * we know has already filled the L1D. + */ EX: { lw r4, r1; addi r1, r1, 4; addi r20, r1, 16 } /* r4 = WORD_12 */ EX: { lw r8, r1; addi r1, r1, 4; slt_u r13, r20, r15 }/* r8 = WORD_13 */ EX: { lw r11, r1; addi r1, r1, -52; mvz r20, r13, r1 } /* r11 = WORD_14 */ - /* Load the three remaining words from the first L1D line, first - * stalling until it has filled by "looking at" r16. - */ + /* Load the three remaining words from the first L1D line, first + * stalling until it has filled by "looking at" r16. + */ EX: { lw r13, r1; addi r1, r1, 4; move zero, r16 } /* r13 = WORD_1 */ EX: { lw r14, r1; addi r1, r1, 4 } /* r14 = WORD_2 */ EX: { lw r15, r1; addi r1, r1, 8; addi r10, r0, 60 } /* r15 = WORD_3 */ - /* Load second word from the second L1D line, first - * stalling until it has filled by "looking at" r17. - */ + /* Load second word from the second L1D line, first + * stalling until it has filled by "looking at" r17. + */ EX: { lw r19, r1; addi r1, r1, 4; move zero, r17 } /* r19 = WORD_5 */ - /* Store last word to the destination line, potentially dirtying it - * for the first time, which keeps the L2 busy for two cycles. - */ + /* Store last word to the destination line, potentially dirtying it + * for the first time, which keeps the L2 busy for two cycles. + */ EX: { sw r10, r12 } /* store(WORD_15) */ - /* Use two L1D hits to cover the sw L2 access above. */ + /* Use two L1D hits to cover the sw L2 access above. */ EX: { lw r10, r1; addi r1, r1, 4 } /* r10 = WORD_6 */ EX: { lw r12, r1; addi r1, r1, 4 } /* r12 = WORD_7 */ - /* Fill third L1D line. */ + /* Fill third L1D line. */ EX: { lw r18, r1; addi r1, r1, 4 } /* r18 = WORD_8 */ - /* Store first L1D line. */ + /* Store first L1D line. */ EX: { sw r0, r16; addi r0, r0, 4; add r16, r0, r2 } /* store(WORD_0) */ EX: { sw r0, r13; addi r0, r0, 4; andi r16, r16, -64 } /* store(WORD_1) */ EX: { sw r0, r14; addi r0, r0, 4; slt_u r16, r9, r16 } /* store(WORD_2) */ #if CHIP_HAS_WH64() EX: { sw r0, r15; addi r0, r0, 4; addi r13, sp, -64 } /* store(WORD_3) */ #else - /* Back up the r9 to a cache line we are already storing to + /* Back up the r9 to a cache line we are already storing to * if it gets past the end of the dest vector. Strictly speaking, * we don't need to back up to the start of a cache line, but it's free * and tidy, so why not? - */ + */ EX: { sw r0, r15; addi r0, r0, 4; andi r13, r0, -64 } /* store(WORD_3) */ #endif - /* Store second L1D line. */ + /* Store second L1D line. */ EX: { sw r0, r17; addi r0, r0, 4; mvz r9, r16, r13 }/* store(WORD_4) */ EX: { sw r0, r19; addi r0, r0, 4 } /* store(WORD_5) */ EX: { sw r0, r10; addi r0, r0, 4 } /* store(WORD_6) */ @@ -348,30 +350,30 @@ EX: { lw r13, r1; addi r1, r1, 4; move zero, r18 } /* r13 = WORD_9 */ EX: { lw r14, r1; addi r1, r1, 4 } /* r14 = WORD_10 */ EX: { lw r15, r1; move r1, r20 } /* r15 = WORD_11 */ - /* Store third L1D line. */ + /* Store third L1D line. */ EX: { sw r0, r18; addi r0, r0, 4 } /* store(WORD_8) */ EX: { sw r0, r13; addi r0, r0, 4 } /* store(WORD_9) */ EX: { sw r0, r14; addi r0, r0, 4 } /* store(WORD_10) */ EX: { sw r0, r15; addi r0, r0, 4 } /* store(WORD_11) */ - /* Store rest of fourth L1D line. */ + /* Store rest of fourth L1D line. */ EX: { sw r0, r4; addi r0, r0, 4 } /* store(WORD_12) */ - { + { EX: sw r0, r8 /* store(WORD_13) */ - addi r0, r0, 4 + addi r0, r0, 4 /* Will r2 be > 64 after we subtract 64 below? */ - shri r4, r2, 7 - } - { + shri r4, r2, 7 + } + { EX: sw r0, r11 /* store(WORD_14) */ - addi r0, r0, 8 - /* Record 64 bytes successfully copied. */ - addi r2, r2, -64 - } + addi r0, r0, 8 + /* Record 64 bytes successfully copied. */ + addi r2, r2, -64 + } { jrp lr; move lr, r27 } - /* Convey to the backtrace library that the stack frame is size + /* Convey to the backtrace library that the stack frame is size * zero, and the real return address is on the stack rather than * in 'lr'. */ diff --git a/arch/tile/lib/memmove_32.c b/arch/tile/lib/memmove.c index fd615ae6ade..fd615ae6ade 100644 --- a/arch/tile/lib/memmove_32.c +++ b/arch/tile/lib/memmove.c diff --git a/arch/tile/lib/memset_32.c b/arch/tile/lib/memset_32.c index d014c1fbcbc..57dbb3a5bff 100644 --- a/arch/tile/lib/memset_32.c +++ b/arch/tile/lib/memset_32.c @@ -18,6 +18,7 @@ #include <linux/string.h> #include <linux/module.h> +#undef memset void *memset(void *s, int c, size_t n) { diff --git a/arch/tile/lib/strlen_32.c b/arch/tile/lib/strlen_32.c index f26f88e11e4..4974292a553 100644 --- a/arch/tile/lib/strlen_32.c +++ b/arch/tile/lib/strlen_32.c @@ -16,6 +16,8 @@ #include <linux/string.h> #include <linux/module.h> +#undef strlen + size_t strlen(const char *s) { /* Get an aligned pointer. */ diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c index 704f3e8a438..f295b4ac941 100644 --- a/arch/tile/mm/fault.c +++ b/arch/tile/mm/fault.c @@ -66,10 +66,10 @@ static noinline void force_sig_info_fault(int si_signo, int si_code, #ifndef __tilegx__ /* * Synthesize the fault a PL0 process would get by doing a word-load of - * an unaligned address or a high kernel address. Called indirectly - * from sys_cmpxchg() in kernel/intvec.S. + * an unaligned address or a high kernel address. */ -int _sys_cmpxchg_badaddr(unsigned long address, struct pt_regs *regs) +SYSCALL_DEFINE2(cmpxchg_badaddr, unsigned long, address, + struct pt_regs *, regs) { if (address >= PAGE_OFFSET) force_sig_info_fault(SIGSEGV, SEGV_MAPERR, address, @@ -563,10 +563,10 @@ do_sigbus: /* * When we take an ITLB or DTLB fault or access violation in the * supervisor while the critical section bit is set, the hypervisor is - * reluctant to write new values into the EX_CONTEXT_1_x registers, + * reluctant to write new values into the EX_CONTEXT_K_x registers, * since that might indicate we have not yet squirreled the SPR * contents away and can thus safely take a recursive interrupt. - * Accordingly, the hypervisor passes us the PC via SYSTEM_SAVE_1_2. + * Accordingly, the hypervisor passes us the PC via SYSTEM_SAVE_K_2. * * Note that this routine is called before homecache_tlb_defer_enter(), * which means that we can properly unlock any atomics that might @@ -610,7 +610,7 @@ struct intvec_state do_page_fault_ics(struct pt_regs *regs, int fault_num, * fault. We didn't set up a kernel stack on initial entry to * sys_cmpxchg, but instead had one set up by the fault, which * (because sys_cmpxchg never releases ICS) came to us via the - * SYSTEM_SAVE_1_2 mechanism, and thus EX_CONTEXT_1_[01] are + * SYSTEM_SAVE_K_2 mechanism, and thus EX_CONTEXT_K_[01] are * still referencing the original user code. We release the * atomic lock and rewrite pt_regs so that it appears that we * came from user-space directly, and after we finish the diff --git a/arch/tile/mm/homecache.c b/arch/tile/mm/homecache.c index fb3b4a55cec..d78df3a6ee1 100644 --- a/arch/tile/mm/homecache.c +++ b/arch/tile/mm/homecache.c @@ -37,6 +37,8 @@ #include <asm/pgalloc.h> #include <asm/homecache.h> +#include <arch/sim.h> + #include "migrate.h" @@ -217,13 +219,6 @@ static unsigned long cache_flush_length(unsigned long length) return (length >= CHIP_L2_CACHE_SIZE()) ? HV_FLUSH_EVICT_L2 : length; } -/* On the simulator, confirm lines have been evicted everywhere. */ -static void validate_lines_evicted(unsigned long pfn, size_t length) -{ - sim_syscall(SIM_SYSCALL_VALIDATE_LINES_EVICTED, - (HV_PhysAddr)pfn << PAGE_SHIFT, length); -} - /* Flush a page out of whatever cache(s) it is in. */ void homecache_flush_cache(struct page *page, int order) { @@ -234,7 +229,7 @@ void homecache_flush_cache(struct page *page, int order) homecache_mask(page, pages, &home_mask); flush_remote(pfn, length, &home_mask, 0, 0, 0, NULL, NULL, 0); - validate_lines_evicted(pfn, pages * PAGE_SIZE); + sim_validate_lines_evicted(PFN_PHYS(pfn), pages * PAGE_SIZE); } diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c index d89c9eacd16..78e1982cb6c 100644 --- a/arch/tile/mm/init.c +++ b/arch/tile/mm/init.c @@ -1060,7 +1060,7 @@ void free_initmem(void) /* * Free the pages mapped from 0xc0000000 that correspond to code - * pages from 0xfd000000 that we won't use again after init. + * pages from MEM_SV_INTRPT that we won't use again after init. */ free_init_pages("unused kernel text", (unsigned long)_sinittext - text_delta, diff --git a/drivers/char/hvc_tile.c b/drivers/char/hvc_tile.c index c4efb55cbc0..7a84a059547 100644 --- a/drivers/char/hvc_tile.c +++ b/drivers/char/hvc_tile.c @@ -61,7 +61,8 @@ console_initcall(hvc_tile_console_init); static int __init hvc_tile_init(void) { - hvc_alloc(0, 0, &hvc_tile_get_put_ops, 128); - return 0; + struct hvc_struct *s; + s = hvc_alloc(0, 0, &hvc_tile_get_put_ops, 128); + return IS_ERR(s) ? PTR_ERR(s) : 0; } device_initcall(hvc_tile_init); diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 95bda87a3e8..995840664a5 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -374,7 +374,7 @@ config SLUB_STATS config DEBUG_KMEMLEAK bool "Kernel memory leak detector" depends on DEBUG_KERNEL && EXPERIMENTAL && !MEMORY_HOTPLUG && \ - (X86 || ARM || PPC || S390 || SPARC64 || SUPERH || MICROBLAZE) + (X86 || ARM || PPC || S390 || SPARC64 || SUPERH || MICROBLAZE || TILE) select DEBUG_FS if SYSFS select STACKTRACE if STACKTRACE_SUPPORT |