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[ Upstream commit fcd26f7ae2ea5889134e8b3d60a42ce8b993c95f ]
If we do a userspace access from kernel mode, and get a
data access exception, we need to check the exception
table just like a normal fault does.
The spitfire DAX handler was doing this, but such logic
was missing from the sun4v DAX code.
Reported-by: Dennis Gilmore <dgilmore@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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[ Upstream commit e42650196df34789c825fa83f8bb37a5d5e52c14 ]
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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commit 1134723e96f6e2abcf8bfd7a2d1c96fcc323ef35 upstream.
Remove __attribute__((weak)) from common code sys_pipe implemantation.
IA64, ALPHA, SUPERH (32bit) and SPARC (32bit) have own implemantations
with the same name. Just rename them.
For sys_pipe2 there is no architecture specific implementation.
Cc: Richard Henderson <rth@twiddle.net>
Cc: David S. Miller <davem@davemloft.net>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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[ Upstream commit 410d2c8187ed969238ba98008c1d57307a56cfd8 ]
Copy the FPU state to the task's thread_info->fpregs for the VIS emulation
functions to access.
Signed-off-by: Hong H. Pham <hong.pham@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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[ Upstream commit 726c12f57d7e3ff43693d88e13b1ff02464c75d3 ]
This patch fixes some bugs in VIS emulation that cause the GCC test
failure
FAIL: gcc.target/sparc/pdist-3.c execution test
for both 32-bit and 64-bit testing on hardware lacking these
instructions. The emulation code for the pdist instruction uses
RS1(insn) for both source registers rs1 and rs2, which is obviously
wrong and leads to the instruction doing nothing (the observed
problem), and further inspection of the code shows that RS1 uses a
shift of 24 and RD a shift of 25, which clearly cannot both be right;
examining SPARC documentation indicates the correct shift for RS1 is
14.
This patch fixes the bug if single-stepping over the affected
instruction in the debugger, but not if the testcase is run
standalone. For that, Wind River has another patch I hope they will
send as a followup to this patch submission.
Signed-off-by: Joseph Myers <joseph@codesourcery.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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[ Upstream commit 5769907ade8dda7002b304c03ef9e4ee5c1e0821 ]
From: Chris Torek <chris.torek@windriver.com>
>The SPARC64 kernel code for PTRACE_SETFPREGS64 appears to be an exact copy
>of that for PTRACE_GETFPREGS64. This means that gdbserver and native
>64-bit GDB cannot set floating-point registers.
It looks like a simple typo.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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[ Upstream commit 145e1c0023585e0e8f6df22316308ec61c5066b2 ]
There is a problem discovered in recent versions of ATI Mach64 driver
in X.org on sparc64 architecture. In short, the driver fails to mmap
MMIO aperture (PCI resource #2).
I've found that kernel's __pci_mmap_make_offset() returns EINVAL. It
checks whether user attempts to mmap more than the resource length,
which is 0x1000 bytes in our case. But PAGE_SIZE on SPARC64 is 0x2000
and this is what actually is being mmaped. So __pci_mmap_make_offset()
failed for this PCI resource.
Signed-off-by: Max Dmitrichenko <dmitrmax@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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[ Upstream commit e0037df3852b4b60edbe01f70f4968e4a9fdb272 ]
Make arch/sparc64/kernel/trampoline.S in 2.6.27.1 lock prom_entry_lock
when calling the PROM. This prevents a race condition that I observed
causing a hang on startup on a 12-CPU E4500.
I am not subscribed to this list, so please CC me on replies.
Signed-off-by: Andrea Shepard <andrea@persephoneslair.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Just like in the arch/sparc64/kernel/of_device.c code fix commit
071d7f4c3b411beae08d27656e958070c43b78b4 ("sparc64: Fix SMP bootup
with CONFIG_STACK_DEBUG or ftrace.") we have to check the OF device
node name for "pci" instead of relying upon the 'device_type' property
being there on all PCI bridges.
Tested by Meelis Roos, and confirmed to make the PCI QFE devices
reappear on the E3500 system.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Based upon a bug report by Meelis Roos.
The OF device layer builds properties by matching bus types and
applying 'range' properties as appropriate, up to the root.
The match for "PCI" busses is looking at the 'device_type' property,
and this does work %99 of the time.
But on an E3500 system with a PCI QFE card, the DEC 21153 bridge
sitting above the QFE network interface devices has a 'name' of "pci",
but it completely lacks a 'device_type' property. So we don't match
it as a PCI bus, and subsequently we end up with no resource values at
all for the devices sitting under that DEC bridge.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Based upon a report by Meelis Roos.
Any function call can try to access the current
thread register via the _mcount hooks when the kernel
is built with -pg (via ftrace or STACK_DEBUG).
That can't be setup properly very early on during
the bootup of other cpus for sun4u and some early
sun4v systems.
So add notrace markers to these specific functions, so
that _mcount doesn't get invoked too early.
Signed-off-by: David S. Miller <davem@davemloft.net>
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We no longer put the top-level PCI controller device into the
PCI layer device list. So pbm->pci_bus->self is always NULL.
Therefore, use direct PCI config space accesses to get at
the PCI controller's PCI_STATUS register.
Tested by Meelis Roos.
Signed-off-by: David S. Miller <davem@davemloft.net>
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As noticed by Russell King, we were not setting this properly
to the number of entries, but rather the total size.
This results in the core dumping code allocating waayyyy too
much memory.
Signed-off-by: David S. Miller <davem@davemloft.net>
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We need to pass IRQF_SHARED, otherwise we get things like:
IRQ handler type mismatch for IRQ 33
current handler: PSYCHO_UE
Call Trace:
[000000000048394c] request_irq+0xac/0x120
[00000000007c5f6c] psycho_scan_bus+0x98/0x158
[00000000007c2bc0] pcibios_init+0xdc/0x12c
[0000000000426a5c] do_one_initcall+0x1c/0x160
[00000000007c0180] kernel_init+0x9c/0xfc
[0000000000427050] kernel_thread+0x30/0x60
[00000000006ae1d0] rest_init+0x10/0x60
on e3500 and similar systems.
On a single board, the UE interrupts of two Psycho nodes
are funneled through the same interrupt, from of_debug=3
dump:
/pci@b,4000: direct translate 2ee --> 21
...
/pci@b,2000: direct translate 2ee --> 21
Decimal "33" mentioned above is the hex "21" mentioned here.
Thanks to Meelis Roos for dumps and testing.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Use the IMAP offset calculation for OBIO devices as documented in the
programmer's manual. Which is "0x10000 + ((ino & 0x1f) << 3)"
Signed-off-by: David S. Miller <davem@davemloft.net>
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When a CPU is offlined, we leave the timer interrupts disabled
because fixup_irqs() does not explicitly take care of that case.
Fix this by invoking tick_ops->disable_irq().
Based upon analysis done by Paul E. McKenney.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Make sparc64 refrain from clearing a given to-be-offlined CPU's bit in the
cpu_online_mask until it has processed pending irqs. This change
prevents other CPUs from being blindsided by an apparently offline CPU
nevertheless changing globally visible state.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When I switched sparc64 over to the generic helpers for
smp_call_function(), I didn't convert the dinky call_lock
we had.
Use ipi_call_lock() and ipi_call_unlock().
Signed-off-by: David S. Miller <davem@davemloft.net>
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When a device is under an EBUS or ISA bus, the resource flags
don't get set properly.
Fix this by re-evaluating the resource flags at each level of
bus as we apply ranges on the way to the root. And let PCI
override any existing flags setting, but don't let the
default flags calculator make such overrides.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Things like lockdep can try to do stack backtraces before
the irqstack blocks have been setup. So don't try to match
their ranges so early on.
Also, remove unused variable in save_stack_trace().
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Based upon a report and initial patch by Friedrich Oslage.
The intention is to provide this facility for
__trigger_all_cpu_backtrace even if MAGIC_SYSRQ is not set.
The only part that should have MAGIC_SYSRQ ifdef protection is the
sparc_globalreg_op sysrq regitration and immediate code.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Bug reported by Alexander Beregalov.
Before we dereference the stack frame or try to peek at the
pt_regs magic value, make sure the entire object is within
the kernel stack bounds.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Use linux/of_device.h instead.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Noticed by Adrian Bunk.
Signed-off-by: David S. Miller <davem@davemloft.net>
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All of the xcall delivery implementation is cpumask agnostic, so
we can pass around pointers to const cpumask_t objects everywhere.
The sad remaining case is the argument to arch_send_call_function_ipi().
Signed-off-by: David S. Miller <davem@davemloft.net>
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It can eat up a lot of stack space when NR_CPUS is large.
We retain some of it's functionality by reporting at least one
of the cpu's which are seen in error state.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Then modify all of the xcall dispatch implementations get passed and
use this information.
Now all of the xcall dispatch implementations do not need to be mindful
of details such as "is current cpu in the list?" and "is cpu online?"
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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This just facilitates the next changeset where we'll be building
the cpu list and mondo block in this helper function.
Signed-off-by: David S. Miller <davem@davemloft.net>
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The idea is that we'll use this cpu list array and mondo block
even for non-hypervisor platforms.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Ideally this could be simplified further such that we could pass
the pointer down directly into the xcall_deliver() implementation.
But if we do that we need to do the "cpu_online(cpu)" and
"cpu != self" checks down in those functions.
Signed-off-by: David S. Miller <davem@davemloft.net>
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We know the cpu is online and not the current cpu here.
Signed-off-by: David S. Miller <davem@davemloft.net>
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For these cases the callers make sure:
1) The cpus indicated are online.
2) The current cpu is not in the list of indicated cpus.
Therefore we can pass a pointer to the mask directly.
One of the motivations in this transformation is to make use of
"&cpumask_of_cpu(cpu)" which evaluates to a pointer to constant
data in the kernel and thus takes up no stack space.
Hopefully someone in the future will change the interface of
arch_send_call_function_ipi() such that it passes a const cpumask_t
pointer so that this will optimize ever further.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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There remained some spots still vectoring to the appropriate
*_xcall_deliver() function manually.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Initialize it using the smp_setup_processor_id() hook.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Removed duplicated #include <linux/tracehook.h> in
arch/sparc64/kernel/signal.c.
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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That's the userland thread register, so we should never try to change
it like this.
Based upon glibc bug nptl/6577 and suggestions by Jakub Jelinek.
Signed-off-by: David S. Miller <davem@davemloft.net>
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The story is that what we used to do when we actually used
smp_report_regs() is that if you specifically only wanted to have the
current cpu's registers dumped you would call "__show_regs()"
otherwise you would call show_regs() which also invoked
smp_report_regs().
Now that we killed off smp_report_regs() there is no longer any
reason to have these two routines, just show_regs() is sufficient.
Also kill off a stray declaration of show_regs() in sparc64_ksym.c
Signed-off-by: David S. Miller <davem@davemloft.net>
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All the call sites are #if 0'd out and we have a much more
useful global cpu dumping facility these days. smp_report_regs()
is way too verbose to be usable.
Signed-off-by: David S. Miller <davem@davemloft.net>
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It just clutters everything up and even though I wrote that hack I
can't remember having used it in the last 5 years or so.
Signed-off-by: David S. Miller <davem@davemloft.net>
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We already have code that does this, but it is only currently attached
to sysrq-'y'.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Record one more level of stack frame program counter.
Particularly when lockdep and all sorts of spinlock debugging is
enabled, figuring out the caller of spin_lock() is difficult when the
cpu is stuck on the lock.
Signed-off-by: David S. Miller <davem@davemloft.net>
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I forgot to delete this when I removed the ISA bus layer
from the sparc ports.
Signed-off-by: David S. Miller <davem@davemloft.net>
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We were picking %i7 out of the wrong register window
stack slot.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Call the standard hook after setting up signal handlers.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This adds TIF_NOTIFY_RESUME support for sparc64.
When set, we call tracehook_notify_resume() on the way to user mode.
Signed-off-by: Roland McGrath <roland@redhat.com>
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This changes sparc64 syscall tracing to use the new tracehook.h entry
points.
[ Add assembly changes to force an immediate -ENOSYS return from
the system call when syscall_trace() returns non-zero at syscall
entry. -DaveM ]
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The majority of this patch was created by the following script:
***
ASM=arch/sparc/include/asm
mkdir -p $ASM
git mv include/asm-sparc64/ftrace.h $ASM
git rm include/asm-sparc64/*
git mv include/asm-sparc/* $ASM
sed -ie 's/asm-sparc64/asm/g' $ASM/*
sed -ie 's/asm-sparc/asm/g' $ASM/*
***
The rest was an update of the top-level Makefile to use sparc
for header files when sparc64 is being build.
And a small fixlet to pick up the correct unistd.h from
sparc64 code.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
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