linux.git/arch/powerpc/kernel/crash.c, branch v3.2 Linux kernel source tree powerpc: add export.h to files making use of EXPORT_SYMBOL 2011-10-31T23:30:37+00:00 Paul Gortmaker paul.gortmaker@windriver.com 2011-05-27T14:46:24+00:00 66b15db69c2553036cc25f6e2e74fe7e3aa2761e With module.h being implicitly everywhere via device.h, the absence of explicitly including something for EXPORT_SYMBOL went unnoticed. Since we are heading to fix things up and clean module.h from the device.h file, we need to explicitly include these files now. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> 
With module.h being implicitly everywhere via device.h, the absence
of explicitly including something for EXPORT_SYMBOL went unnoticed.
Since we are heading to fix things up and clean module.h from the
device.h file, we need to explicitly include these files now.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
powerpc/kdump: Fix timeout in crash_kexec_wait_realmode 2011-07-19T05:13:05+00:00 Michael Neuling mikey@neuling.org 2011-07-04T20:40:10+00:00 63f21a56f1cc0b800a4c00349c59448f82473d19 The existing code it pretty ugly. How about we clean it up even more like this? From: Anton Blanchard <anton@samba.org> We check for timeout expiry in the outer loop, but we also need to check it in the inner loop or we can lock up forever waiting for a CPU to hit real mode. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Neuling <mikey@neuling.org> Cc: <stable@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
The existing code it pretty ugly.  How about we clean it up even more
like this?

From: Anton Blanchard <anton@samba.org>

We check for timeout expiry in the outer loop, but we also need to
check it in the inner loop or we can lock up forever waiting for a
CPU to hit real mode.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/kdump64: Don't reference freed memory as pacas 2011-05-19T04:30:44+00:00 Milton Miller miltonm@bga.com 2011-05-10T19:28:41+00:00 bd9e5eefecb3d69018bb95796298019d309cbec8 Starting with 1426d5a3bd07589534286375998c0c8c6fdc5260 (powerpc: Dynamically allocate pacas) the space for pacas beyond cpu_possible is freed, but we failed to update the loop in crash.c. Since c1854e00727f50f7ac99e98d26ece04c087ef785 (powerpc: Set nr_cpu_ids early and use it to free PACAs) the number of pacas allocated is always nr_cpu_ids. Signed-off-by: Milton Miller <miltonm@bga.com> Cc: <stable@kernel.org> # .34.x Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
Starting with 1426d5a3bd07589534286375998c0c8c6fdc5260 (powerpc:
Dynamically allocate pacas) the space for pacas beyond cpu_possible
is freed, but we failed to update the loop in crash.c.

Since c1854e00727f50f7ac99e98d26ece04c087ef785 (powerpc: Set nr_cpu_ids
early and use it to free PACAs) the number of pacas allocated is
always nr_cpu_ids.

Signed-off-by: Milton Miller <miltonm@bga.com>
Cc: <stable@kernel.org> # .34.x
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/kexec: Fix build failure on 32-bit SMP 2011-05-04T05:22:59+00:00 Ben Hutchings ben@decadent.org.uk 2011-04-24T15:04:31+00:00 7707e4110e5692fe85e7e6c471c9bb2a9254d313 Commit b987812b3fcaf70fdf0037589e5d2f5f2453e6ce left crash_kexec_wait_realmode() undefined for UP. Commit 7c7a81b53e581d727d069cc45df5510516faac31 defined it for UP but left it undefined for 32-bit SMP. Seems like people are getting confused by nested #ifdef's, so move the definitions of crash_kexec_wait_realmode() after the #ifdef CONFIG_SMP section. Compile-tested with 32-bit UP, 32-bit SMP and 64-bit SMP configurations. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
Commit b987812b3fcaf70fdf0037589e5d2f5f2453e6ce left
crash_kexec_wait_realmode() undefined for UP.

Commit 7c7a81b53e581d727d069cc45df5510516faac31 defined it for UP but
left it undefined for 32-bit SMP.

Seems like people are getting confused by nested #ifdef's, so move the
definitions of crash_kexec_wait_realmode() after the #ifdef CONFIG_SMP
section.

Compile-tested with 32-bit UP, 32-bit SMP and 64-bit SMP configurations.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc: Convert old cpumask API into new one 2011-05-04T05:22:59+00:00 KOSAKI Motohiro kosaki.motohiro@jp.fujitsu.com 2011-04-28T05:07:23+00:00 104699c0ab473535793b5fea156adaf309afd29b Adapt new API. Almost change is trivial. Most important change is the below line because we plan to change task->cpus_allowed implementation. - ctx->cpus_allowed = current->cpus_allowed; Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
Adapt new API.

Almost change is trivial. Most important change is the below line
because we plan to change task->cpus_allowed implementation.

-       ctx->cpus_allowed = current->cpus_allowed;

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/kexec: Fix regression causing compile failure on UP 2011-04-18T03:06:45+00:00 Paul Gortmaker paul.gortmaker@windriver.com 2011-04-13T06:30:08+00:00 7c7a81b53e581d727d069cc45df5510516faac31 Recent commit b987812b3fcaf70fdf0037589e5d2f5f2453e6ce caused a compile failure on UP because a considerably large block of the file was included within CONFIG_SMP, hence making a stub function not exposed on UP builds when it needed to be. Relocate the stub to the #else /* ! CONFIG_SMP */ section and also annotate the relevant else/endif so that nobody else falls into the same trap I did. Reported-by: Michael Guntsche <mike@it-loops.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
Recent commit b987812b3fcaf70fdf0037589e5d2f5f2453e6ce caused
a compile failure on UP because a considerably large block
of the file was included within CONFIG_SMP, hence making a stub
function not exposed on UP builds when it needed to be.

Relocate the stub to the #else /* ! CONFIG_SMP */ section
and also annotate the relevant else/endif so that nobody
else falls into the same trap I did.

Reported-by: Michael Guntsche <mike@it-loops.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/kexec: Fix mismatched ifdefs for PPC64/SMP. 2011-04-05T06:22:10+00:00 Paul Gortmaker paul.gortmaker@windriver.com 2011-03-31T07:27:20+00:00 b987812b3fcaf70fdf0037589e5d2f5f2453e6ce Commit b3df895aebe091b1657 "powerpc/kexec: Add support for FSL-BookE" introduced the original PPC_STD_MMU_64 checks around the function crash_kexec_wait_realmode(). Then commit c2be05481f61252 "powerpc: Fix default_machine_crash_shutdown #ifdef botch" changed the ifdef around the calling site to add a check on SMP, but the ifdef around the function itself was left unchanged, leaving an unused function for PPC_STD_MMU_64=y and SMP=n Rather than have two ifdefs that can get out of sync like this, simply put the corrected conditional around the function and use a stub to get rid of one set of ifdefs completely. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
Commit b3df895aebe091b1657 "powerpc/kexec: Add support for FSL-BookE"
introduced the original PPC_STD_MMU_64 checks around the function
crash_kexec_wait_realmode().   Then commit c2be05481f61252
"powerpc: Fix default_machine_crash_shutdown #ifdef botch" changed
the ifdef around the calling site to add a check on SMP, but the
ifdef around the function itself was left unchanged, leaving an
unused function for PPC_STD_MMU_64=y and SMP=n

Rather than have two ifdefs that can get out of sync like this,
simply put the corrected conditional around the function and use
a stub to get rid of one set of ifdefs completely.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/kdump: Move crash_kexec_stop_spus to kdump crash handler 2011-01-21T03:08:36+00:00 Anton Blanchard anton@samba.org 2011-01-21T02:43:59+00:00 158d5b5e3654938cca963eec82cd10af49cda17f Use the crash handler hooks to run the SPU stop code, just like we do for ehea and cell RAS code. While I'm here I noticed "CPUSs reliabally" so fix the spelling MISTAKESs reliabally. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
Use the crash handler hooks to run the SPU stop code, just like we do for
ehea and cell RAS code.

While I'm here I noticed "CPUSs reliabally"

so fix the spelling MISTAKESs reliabally.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/kexec: make masking/disabling interrupts generic 2010-10-14T05:52:46+00:00 Matthew McClintock msm@freescale.com 2010-09-16T22:58:23+00:00 c71635d288ffd3bcdfb30308f681f9af34f0fc81 Right now just the kexec crash pathway turns turns off the interrupts. Pull that out and make a generic version for use elsewhere Signed-off-by: Matthew McClintock <msm@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> 
Right now just the kexec crash pathway turns turns off the interrupts.
Pull that out and make a generic version for use elsewhere

Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
powerpc/kdump: Stop all other CPUs before running crash handlers 2010-08-24T05:26:27+00:00 Anton Blanchard anton@samba.org 2010-08-02T20:39:41+00:00 249ec2287579d578ea72593dc3b30a00121c4075 During kdump we run the crash handlers first then stop all other CPUs. We really want to stop all CPUs as close to the fail as possible and also have a very controlled environment for running the crash handlers, so it makes sense to reverse the order. Signed-off-by: Anton Blanchard <anton@samba.org> Acked-by: Matt Evans <matt@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 
During kdump we run the crash handlers first then stop all other CPUs.
We really want to stop all CPUs as close to the fail as possible and also
have a very controlled environment for running the crash handlers, so it
makes sense to reverse the order.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>