diff options
Diffstat (limited to 'arch/s390/include/asm/processor.h')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 231 |
1 files changed, 158 insertions, 73 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 8d6f8716957..6f02d452bbe 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -1,8 +1,6 @@ /* - * include/asm-s390/processor.h - * * S390 version - * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation + * Copyright IBM Corp. 1999 * Author(s): Hartmut Penner (hp@de.ibm.com), * Martin Schwidefsky (schwidefsky@de.ibm.com) * @@ -13,13 +11,38 @@ #ifndef __ASM_S390_PROCESSOR_H #define __ASM_S390_PROCESSOR_H +#define CIF_MCCK_PENDING 0 /* machine check handling is pending */ +#define CIF_ASCE 1 /* user asce needs fixup / uaccess */ + +#define _CIF_MCCK_PENDING (1<<CIF_MCCK_PENDING) +#define _CIF_ASCE (1<<CIF_ASCE) + + +#ifndef __ASSEMBLY__ + #include <linux/linkage.h> +#include <linux/irqflags.h> #include <asm/cpu.h> #include <asm/page.h> #include <asm/ptrace.h> #include <asm/setup.h> +#include <asm/runtime_instr.h> + +static inline void set_cpu_flag(int flag) +{ + S390_lowcore.cpu_flags |= (1U << flag); +} + +static inline void clear_cpu_flag(int flag) +{ + S390_lowcore.cpu_flags &= ~(1U << flag); +} + +static inline int test_cpu_flag(int flag) +{ + return !!(S390_lowcore.cpu_flags & (1U << flag)); +} -#ifdef __KERNEL__ /* * Default implementation of macro that returns current * instruction pointer ("program counter"). @@ -32,38 +55,36 @@ static inline void get_cpu_id(struct cpuid *ptr) } extern void s390_adjust_jiffies(void); -extern void print_cpu_info(void); -extern int get_cpu_capability(unsigned int *); +extern const struct seq_operations cpuinfo_op; +extern int sysctl_ieee_emulation_warnings; +extern void execve_tail(void); /* * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit. */ -#ifndef __s390x__ +#ifndef CONFIG_64BIT #define TASK_SIZE (1UL << 31) +#define TASK_MAX_SIZE (1UL << 31) #define TASK_UNMAPPED_BASE (1UL << 30) -#else /* __s390x__ */ +#else /* CONFIG_64BIT */ #define TASK_SIZE_OF(tsk) ((tsk)->mm->context.asce_limit) #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \ (1UL << 30) : (1UL << 41)) #define TASK_SIZE TASK_SIZE_OF(current) +#define TASK_MAX_SIZE (1UL << 53) -#endif /* __s390x__ */ - -#ifdef __KERNEL__ +#endif /* CONFIG_64BIT */ -#ifndef __s390x__ +#ifndef CONFIG_64BIT #define STACK_TOP (1UL << 31) #define STACK_TOP_MAX (1UL << 31) -#else /* __s390x__ */ +#else /* CONFIG_64BIT */ #define STACK_TOP (1UL << (test_thread_flag(TIF_31BIT) ? 31:42)) #define STACK_TOP_MAX (1UL << 42) -#endif /* __s390x__ */ - - -#endif +#endif /* CONFIG_64BIT */ #define HAVE_ARCH_PICK_MMAP_LAYOUT @@ -79,13 +100,32 @@ struct thread_struct { unsigned int acrs[NUM_ACRS]; unsigned long ksp; /* kernel stack pointer */ mm_segment_t mm_segment; - unsigned long prot_addr; /* address of protection-excep. */ - unsigned int trap_no; - per_struct per_info; + unsigned long gmap_addr; /* address of last gmap fault. */ + unsigned int gmap_pfault; /* signal of a pending guest pfault */ + struct per_regs per_user; /* User specified PER registers */ + struct per_event per_event; /* Cause of the last PER trap */ + unsigned long per_flags; /* Flags to control debug behavior */ /* pfault_wait is used to block the process on a pfault event */ unsigned long pfault_wait; + struct list_head list; + /* cpu runtime instrumentation */ + struct runtime_instr_cb *ri_cb; + int ri_signum; +#ifdef CONFIG_64BIT + unsigned char trap_tdb[256]; /* Transaction abort diagnose block */ +#endif }; +/* Flag to disable transactions. */ +#define PER_FLAG_NO_TE 1UL +/* Flag to enable random transaction aborts. */ +#define PER_FLAG_TE_ABORT_RAND 2UL +/* Flag to specify random transaction abort mode: + * - abort each transaction at a random instruction before TEND if set. + * - abort random transactions at a random instruction if cleared. + */ +#define PER_FLAG_TE_ABORT_RAND_TEND 4UL + typedef struct thread_struct thread_struct; /* @@ -116,19 +156,19 @@ struct stack_frame { /* * Do necessary setup to start up a new thread. */ -#define start_thread(regs, new_psw, new_stackp) do { \ - set_fs(USER_DS); \ - regs->psw.mask = psw_user_bits; \ - regs->psw.addr = new_psw | PSW_ADDR_AMODE; \ - regs->gprs[15] = new_stackp; \ +#define start_thread(regs, new_psw, new_stackp) do { \ + regs->psw.mask = PSW_USER_BITS | PSW_MASK_EA | PSW_MASK_BA; \ + regs->psw.addr = new_psw | PSW_ADDR_AMODE; \ + regs->gprs[15] = new_stackp; \ + execve_tail(); \ } while (0) -#define start_thread31(regs, new_psw, new_stackp) do { \ - set_fs(USER_DS); \ - regs->psw.mask = psw_user32_bits; \ - regs->psw.addr = new_psw | PSW_ADDR_AMODE; \ - regs->gprs[15] = new_stackp; \ - crst_table_downgrade(current->mm, 1UL << 31); \ +#define start_thread31(regs, new_psw, new_stackp) do { \ + regs->psw.mask = PSW_USER_BITS | PSW_MASK_BA; \ + regs->psw.addr = new_psw | PSW_ADDR_AMODE; \ + regs->gprs[15] = new_stackp; \ + crst_table_downgrade(current->mm, 1UL << 31); \ + execve_tail(); \ } while (0) /* Forward declaration, a strange C thing */ @@ -136,31 +176,37 @@ struct task_struct; struct mm_struct; struct seq_file; +#ifdef CONFIG_64BIT +extern void show_cacheinfo(struct seq_file *m); +#else +static inline void show_cacheinfo(struct seq_file *m) { } +#endif + /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); -extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); - -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) /* * Return saved PC of a blocked thread. */ extern unsigned long thread_saved_pc(struct task_struct *t); -/* - * Print register of task into buffer. Used in fs/proc/array.c. - */ -extern void task_show_regs(struct seq_file *m, struct task_struct *task); - -extern void show_code(struct pt_regs *regs); - unsigned long get_wchan(struct task_struct *p); #define task_pt_regs(tsk) ((struct pt_regs *) \ (task_stack_page(tsk) + THREAD_SIZE) - 1) #define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr) #define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15]) +/* Has task runtime instrumentation enabled ? */ +#define is_ri_task(tsk) (!!(tsk)->thread.ri_cb) + +static inline unsigned short stap(void) +{ + unsigned short cpu_address; + + asm volatile("stap %0" : "=m" (cpu_address)); + return cpu_address; +} + /* * Give up the time slice of the virtual PU. */ @@ -171,6 +217,8 @@ static inline void cpu_relax(void) barrier(); } +#define arch_mutex_cpu_relax() barrier() + static inline void psw_set_key(unsigned int key) { asm volatile("spka 0(%0)" : : "d" (key)); @@ -181,7 +229,7 @@ static inline void psw_set_key(unsigned int key) */ static inline void __load_psw(psw_t psw) { -#ifndef __s390x__ +#ifndef CONFIG_64BIT asm volatile("lpsw %0" : : "Q" (psw) : "cc"); #else asm volatile("lpswe %0" : : "Q" (psw) : "cc"); @@ -192,7 +240,6 @@ static inline void __load_psw(psw_t psw) * Set PSW mask to specified value, while leaving the * PSW addr pointing to the next instruction. */ - static inline void __load_psw_mask (unsigned long mask) { unsigned long addr; @@ -200,7 +247,7 @@ static inline void __load_psw_mask (unsigned long mask) psw.mask = mask; -#ifndef __s390x__ +#ifndef CONFIG_64BIT asm volatile( " basr %0,0\n" "0: ahi %0,1f-0b\n" @@ -208,41 +255,52 @@ static inline void __load_psw_mask (unsigned long mask) " lpsw %1\n" "1:" : "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc"); -#else /* __s390x__ */ +#else /* CONFIG_64BIT */ asm volatile( " larl %0,1f\n" " stg %0,%O1+8(%R1)\n" " lpswe %1\n" "1:" : "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc"); -#endif /* __s390x__ */ +#endif /* CONFIG_64BIT */ } - + /* - * Function to stop a processor until an interruption occurred + * Rewind PSW instruction address by specified number of bytes. */ -static inline void enabled_wait(void) +static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc) { - __load_psw_mask(PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT | - PSW_MASK_MCHECK | PSW_MASK_WAIT | PSW_DEFAULT_KEY); -} +#ifndef CONFIG_64BIT + if (psw.addr & PSW_ADDR_AMODE) + /* 31 bit mode */ + return (psw.addr - ilc) | PSW_ADDR_AMODE; + /* 24 bit mode */ + return (psw.addr - ilc) & ((1UL << 24) - 1); +#else + unsigned long mask; + mask = (psw.mask & PSW_MASK_EA) ? -1UL : + (psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 : + (1UL << 24) - 1; + return (psw.addr - ilc) & mask; +#endif +} + /* * Function to drop a processor into disabled wait state */ - -static inline void ATTRIB_NORET disabled_wait(unsigned long code) +static inline void __noreturn disabled_wait(unsigned long code) { unsigned long ctl_buf; psw_t dw_psw; - dw_psw.mask = PSW_BASE_BITS | PSW_MASK_WAIT; + dw_psw.mask = PSW_MASK_BASE | PSW_MASK_WAIT | PSW_MASK_BA | PSW_MASK_EA; dw_psw.addr = code; /* * Store status and then load disabled wait psw, * the processor is dead afterwards */ -#ifndef __s390x__ +#ifndef CONFIG_64BIT asm volatile( " stctl 0,0,0(%2)\n" " ni 0(%2),0xef\n" /* switch off protection */ @@ -261,7 +319,7 @@ static inline void ATTRIB_NORET disabled_wait(unsigned long code) " lpsw 0(%1)" : "=m" (ctl_buf) : "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc"); -#else /* __s390x__ */ +#else /* CONFIG_64BIT */ asm volatile( " stctg 0,0,0(%2)\n" " ni 4(%2),0xef\n" /* switch off protection */ @@ -294,11 +352,26 @@ static inline void ATTRIB_NORET disabled_wait(unsigned long code) " lpswe 0(%1)" : "=m" (ctl_buf) : "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc", "0", "1"); -#endif /* __s390x__ */ +#endif /* CONFIG_64BIT */ while (1); } /* + * Use to set psw mask except for the first byte which + * won't be changed by this function. + */ +static inline void +__set_psw_mask(unsigned long mask) +{ + __load_psw_mask(mask | (arch_local_save_flags() & ~(-1UL >> 8))); +} + +#define local_mcck_enable() \ + __set_psw_mask(PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_MCHECK) +#define local_mcck_disable() \ + __set_psw_mask(PSW_KERNEL_BITS | PSW_MASK_DAT) + +/* * Basic Machine Check/Program Check Handler. */ @@ -312,23 +385,35 @@ extern void (*s390_base_ext_handler_fn)(void); #define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL -#endif +extern int memcpy_real(void *, void *, size_t); +extern void memcpy_absolute(void *, void *, size_t); + +#define mem_assign_absolute(dest, val) { \ + __typeof__(dest) __tmp = (val); \ + \ + BUILD_BUG_ON(sizeof(__tmp) != sizeof(val)); \ + memcpy_absolute(&(dest), &__tmp, sizeof(__tmp)); \ +} /* * Helper macro for exception table entries */ -#ifndef __s390x__ -#define EX_TABLE(_fault,_target) \ - ".section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long " #_fault "," #_target "\n" \ - ".previous\n" -#else -#define EX_TABLE(_fault,_target) \ - ".section __ex_table,\"a\"\n" \ - " .align 8\n" \ - " .quad " #_fault "," #_target "\n" \ +#define EX_TABLE(_fault, _target) \ + ".section __ex_table,\"a\"\n" \ + ".align 4\n" \ + ".long (" #_fault ") - .\n" \ + ".long (" #_target ") - .\n" \ ".previous\n" -#endif -#endif /* __ASM_S390_PROCESSOR_H */ +#else /* __ASSEMBLY__ */ + +#define EX_TABLE(_fault, _target) \ + .section __ex_table,"a" ; \ + .align 4 ; \ + .long (_fault) - . ; \ + .long (_target) - . ; \ + .previous + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_S390_PROCESSOR_H */ |