Hi Ganesh,
Some comments below ...
Ganesh Goudar writes:
> Add support to parse and log control memory access
> error for pseries.
>
> Signed-off-by: Ganesh Goudar
> ---
> v2: No changes in this patch.
> ---
> arch/powerpc/platforms/pseries/ras.c | 21 +
> 1 file changed, 2
On 17/08/2021 16:12, Leonardo Brás wrote:
On Tue, 2021-08-17 at 02:59 -0300, Leonardo Brás wrote:
Hello Fred, thanks for the feedback!
On Tue, 2021-07-20 at 19:51 +0200, Frederic Barrat wrote:
On 16/07/2021 10:27, Leonardo Bras wrote:
Update remove_dma_window() so it can be used to remov
On Tue, 17 Aug 2021 21:43:37 +0800, John Garry wrote:
> Use scsi_cmd_to_rq(scsi_cmnd)->tag in preference to scsi_cmnd.tag.
>
>
>
>
Applied to 5.15/scsi-queue, thanks!
[1/1] scsi: ibmvfc: Stop using scsi_cmnd.tag
https://git.kernel.org/mkp/scsi/c/6a036ce0e25c
--
Martin K. Petersen
On Fri, Aug 20, 2021 at 3:50 PM Sean Christopherson wrote:
>
> Revert the __NR_userfaultfd syscall fallback added for KVM selftests now
> that x86's unistd_{32,63}.h overrides are under uapi/ and thus not in
> KVM sefltests' search path, i.e. now that KVM gets x86 syscall numbers
> from the instal
Le 23/08/2021 à 20:46, Segher Boessenkool a écrit :
On Mon, Aug 23, 2021 at 03:29:12PM +, Christophe Leroy wrote:
Instructions lmw/stmw are interesting for functions that are rarely
used and not in the cache, because only one instruction is to be
copied into the instruction cache instead
Stephen Rothwell writes:
> Hi all,
>
> [cc'ing Jon in case he can fix the sphix hang - or knows anything about it]
>
> On Mon, 23 Aug 2021 19:55:40 +1000 Stephen Rothwell
> wrote:
>>
>> After merging the powerpc tree, today's linux-next build (htmldocs)
>> produced this warning:
>>
>
> I misse
From: Changcheng Deng
Clean up the following includecheck warning:
./tools/testing/selftests/powerpc/tm/tm-poison.c: inttypes.h is included
more than once.
No functional change.
Reported-by: Zeal Robot
Signed-off-by: Changcheng Deng
---
tools/testing/selftests/powerpc/tm/tm-poison.c | 1 -
Hi Jona,
On Mon, 23 Aug 2021 08:19:30 -0600 Jonathan Corbet wrote:
>
> Stephen Rothwell writes:
>
> > Hi all,
> >
> > [cc'ing Jon in case he can fix the sphix hang - or knows anything about it]
> >
>
> That's new to me. Which version of sphinx?
3.4.3-2, its a Debian version.
--
Cheers,
Hi mpe, Any comments on this patchset?
On 8/5/21 2:50 PM, Ganesh Goudar wrote:
Add support to parse and log control memory access
error for pseries.
Signed-off-by: Ganesh Goudar
---
v2: No changes in this patch.
---
arch/powerpc/platforms/pseries/ras.c | 21 +
1 file ch
On Mon, Aug 23, 2021 at 07:05:38PM +0200, Christophe Leroy wrote:
> Le 23/08/2021 à 17:58, Segher Boessenkool a écrit :
> >On Mon, Aug 23, 2021 at 07:53:01AM +, Christophe Leroy wrote:
> >> /* Be careful, this will clobber the lr register. */
> >> #define LOAD_REG_ADDR_PIC(reg, name)
On Mon, Aug 23, 2021 at 03:29:12PM +, Christophe Leroy wrote:
> Instructions lmw/stmw are interesting for functions that are rarely
> used and not in the cache, because only one instruction is to be
> copied into the instruction cache instead of 19. However those
> instruction are less performa
Le 23/08/2021 à 17:58, Segher Boessenkool a écrit :
On Mon, Aug 23, 2021 at 07:53:01AM +, Christophe Leroy wrote:
/* Be careful, this will clobber the lr register. */
#define LOAD_REG_ADDR_PIC(reg, name) \
- bl 0f; \
+ bcl 20,3
On Mon, Aug 23, 2021 at 07:53:01AM +, Christophe Leroy wrote:
> /* Be careful, this will clobber the lr register. */
> #define LOAD_REG_ADDR_PIC(reg, name) \
> - bl 0f; \
> + bcl 20,31,0f\
> 0: mflrreg;
Use unsafe_copy_siginfo_to_user() in order to do the copy
within the user access block.
On an mpc 8321 (book3s/32) the improvment is about 5% on a process
sending a signal to itself.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/signal_32.c | 13 ++---
arch/powerpc/kernel/sign
Implement unsafe_clear_user() for powerpc.
It's a copy/paste of unsafe_copy_to_user() with value 0 as source.
It may be improved in a later patch by using 'dcbz' instruction
to zeroize full cache lines at once.
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/uaccess.h | 20
In the same spirit as commit fb05121fd6a2 ("signal: Add
unsafe_get_compat_sigset()"), implement an 'unsafe' version of
copy_siginfo_to_user() in order to use it within user access blocks.
For that, also add an 'unsafe' version of clear_user().
Signed-off-by: Christophe Leroy
---
include/linux/s
Include the new stack frame inside the user access block and set it up
using unsafe_put_user().
On an mpc 8321 (book3s/32) the improvment is about 4% on a process
sending a signal to itself.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/signal_32.c | 29 +
Access the function descriptor of the handler within a
user access block.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/signal_64.c | 14 --
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
inde
Instructions lmw/stmw are interesting for functions that are rarely
used and not in the cache, because only one instruction is to be
copied into the instruction cache instead of 19. However those
instruction are less performant than 19x raw lwz/stw as they require
synchronisation plus one additiona
Use bcl 20,31,+4 instead of bl in order to preserve link stack.
See commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption
in __get_datapage()") for details.
Signed-off-by: Christophe Leroy
---
v2: Added missing ; in LOAD_REG_ADDR_PIC()
---
arch/powerpc/include/asm/ppc_asm.h
Calling 'mfsr' to get the content of segment registers is heavy,
in addition it requires clearing of the 'reserved' bits.
In order to avoid this operation, save it in mm context and in
thread struct.
The saved sr0 is the one used by kernel, this means that on
locking entry it can be used as is.
When interrupt and syscall entries where converted to C, KUEP locking
and unlocking was also converted. It improved performance by unrolling
the loop, and allowed easily implementing boot time deactivation of
KUEP.
However, null_syscall selftest shows that KUEP is still heavy
(361 cycles with KUEP
[ re-send to Darren Hart ]
- On Aug 23, 2021, at 11:18 AM, Mathieu Desnoyers
mathieu.desnoy...@efficios.com wrote:
> - On Aug 20, 2021, at 6:50 PM, Sean Christopherson sea...@google.com
> wrote:
>
>> Add a test to verify an rseq's CPU ID is updated correctly if the task is
>> migrated
- On Aug 20, 2021, at 6:50 PM, Sean Christopherson sea...@google.com wrote:
> Add a test to verify an rseq's CPU ID is updated correctly if the task is
> migrated while the kernel is handling KVM_RUN. This is a regression test
> for a bug introduced by commit 72c3c0fe54a3 ("x86/kvm: Use gener
- On Aug 20, 2021, at 6:49 PM, Sean Christopherson sea...@google.com wrote:
> Invoke rseq's NOTIFY_RESUME handler when processing the flag prior to
> transferring to a KVM guest, which is roughly equivalent to an exit to
> userspace and processes many of the same pending actions. While the ta
Stephen Rothwell writes:
> Hi all,
>
> [cc'ing Jon in case he can fix the sphix hang - or knows anything about it]
That's new to me. Which version of sphinx?
jon
On 12.08.21 11:04, David Hildenbrand wrote:
On 12.08.21 06:02, Hou Wenlong wrote:
From: Sean Christopherson
Refactor kvm_arch_vcpu_fault() to return 'struct page *' instead of
'vm_fault_t' to simplify architecture specific implementations that do
more than return SIGBUS. Currently this onl
On Fri, 2021-08-20 at 17:37 -0500, Bjorn Helgaas wrote:
> On Tue, Jul 20, 2021 at 05:01:45PM +0200, Niklas Schnelle wrote:
> > The helper function pci_dev_is_added() from drivers/pci/pci.h is used in
> > PCI arch code of both s390 and powerpc leading to awkward relative
> > includes. Move it to the
Hi all,
[cc'ing Jon in case he can fix the sphix hang - or knows anything about it]
On Mon, 23 Aug 2021 19:55:40 +1000 Stephen Rothwell
wrote:
>
> After merging the powerpc tree, today's linux-next build (htmldocs)
> produced this warning:
>
I missed a line:
Sphinx parallel build error:
> d
Backport for kernel 5.13
(cherry picked from commit ef486bf448a057a6e2d50e40ae879f7add6585da)
Commit b5efec00b671 ("powerpc/32s: Move KUEP locking/unlocking in C")
removed the 'isync' instruction after adding/removing NX bit in user
segments. The reasoning behind this change was that when setting
* Gautham R Shenoy [2021-08-23 11:41:22]:
> On Sat, Aug 21, 2021 at 02:54:17PM +0530, Srikar Dronamraju wrote:
> > Aneesh reported a crash with a fairly recent upstream kernel when
> > booting kernel whose commandline was appended with nr_cpus=2
> >
> > 1:mon> e
> > cpu 0x1: Vector: 300 (Data Ac
Hi all,
After merging the powerpc tree, today's linux-next build (htmldocs)
produced this warning:
docutils.utils.SystemMessage: Documentation/powerpc/associativity.rst:1:
(SEVERE/4) Title overline & underline mismatch.
NUMA resource associativity
==
On Mon, Aug 23, 2021 at 03:04:37PM +0530, Srikar Dronamraju wrote:
> * Peter Zijlstra [2021-08-23 10:33:30]:
>
> > On Sat, Aug 21, 2021 at 03:55:32PM +0530, Srikar Dronamraju wrote:
> > > Scheduler expects unique number of node distances to be available
> > > at boot. It uses node distance to cal
* Laurent Dufour [2021-08-23 11:21:33]:
> Le 21/08/2021 à 12:25, Srikar Dronamraju a écrit :
> > Currently, a debug message gets printed every time an attempt to
> > add(remove) a CPU. However this is redundant if the CPU is already added
> > (removed) from the node.
> >
> > Cc: linuxppc-dev@lis
* Peter Zijlstra [2021-08-23 10:33:30]:
> On Sat, Aug 21, 2021 at 03:55:32PM +0530, Srikar Dronamraju wrote:
> > Scheduler expects unique number of node distances to be available
> > at boot. It uses node distance to calculate this unique node
> > distances. On Power Servers, node distances for o
On 8/23/21 8:49 AM, Christophe Leroy wrote:
> Commit e65e1fc2d24b ("[PATCH] syscall class hookup for all normal
> targets") added generic support for AUDIT but that didn't include
> support for bi-arch like powerpc.
>
> Commit 4b58841149dc ("audit: Add generic compat syscall support")
> added gene
Christophe Leroy writes:
> Le 23/08/2021 à 10:33, Andreas Schwab a écrit :
>> On Aug 23 2021, Christophe Leroy wrote:
>>
>>> __NR_exit is nowhere used. On most architectures it was removed by
>>
>> ITYM __NR__exit, which is what you are removing.
>>
>
> Indeed.
>
> Michael, can you fix when app
This fixes a compile error with W=1.
arch/powerpc/kernel/prom.c: In function ‘early_reserve_mem’:
arch/powerpc/kernel/prom.c:625:10: error: variable ‘reserve_map’ set but not
used [-Werror=unused-but-set-variable]
__be64 *reserve_map;
^~~
cc1: all warnings being treated as err
Le 21/08/2021 à 12:25, Srikar Dronamraju a écrit :
Currently, a debug message gets printed every time an attempt to
add(remove) a CPU. However this is redundant if the CPU is already added
(removed) from the node.
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Nathan Lynch
Cc: Michael Ellerman
Cc: Ingo
Hello,
These are the remaining patches needed to compile the ppc kernel with
W=1. Audit issues are now being addressed by Christophe in patch :
[v2] powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC
http://patchwork.ozlabs.org/project/linuxppc-dev/patch/dc14509a28a993738b1325211f412be72
This fixes a compile error with W=1.
Cc: Christophe Leroy
Signed-off-by: Cédric Le Goater
---
arch/powerpc/include/asm/syscalls.h | 30 +
1 file changed, 30 insertions(+)
diff --git a/arch/powerpc/include/asm/syscalls.h
b/arch/powerpc/include/asm/syscalls.h
index 3
Le 23/08/2021 à 10:33, Andreas Schwab a écrit :
On Aug 23 2021, Christophe Leroy wrote:
__NR_exit is nowhere used. On most architectures it was removed by
ITYM __NR__exit, which is what you are removing.
Indeed.
Michael, can you fix when applying or do you prefer a new patch ?
On 8/23/21 10:28 AM, Christophe Leroy wrote:
>
>
> Le 19/08/2021 à 16:56, Christophe Leroy a écrit :
>>
>>
>> Le 19/08/2021 à 14:56, Cédric Le Goater a écrit :
>>> This fixes a compile error with W=1.
>>>
>>> Cc: Christophe Leroy
>>> Signed-off-by: Cédric Le Goater
>>> ---
>>>
>>> I don't thi
On Sat, Aug 21, 2021 at 03:55:32PM +0530, Srikar Dronamraju wrote:
> Scheduler expects unique number of node distances to be available
> at boot. It uses node distance to calculate this unique node
> distances. On Power Servers, node distances for offline nodes is not
> available. However, Power Se
On Aug 23 2021, Christophe Leroy wrote:
> __NR_exit is nowhere used. On most architectures it was removed by
ITYM __NR__exit, which is what you are removing.
Andreas.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for
On 8/19/21 4:42 PM, Christophe Leroy wrote:
>
>
> Le 19/08/2021 à 14:56, Cédric Le Goater a écrit :
>> and condition its call with IS_ENABLED(CONFIG_PPC32). This fixes a
>> compile error with W=1.
>>
>> arch/powerpc/kernel/prom.c: In function ‘early_reserve_mem’:
>> arch/powerpc/kernel/prom.c:625
Le 19/08/2021 à 16:56, Christophe Leroy a écrit :
Le 19/08/2021 à 14:56, Cédric Le Goater a écrit :
This fixes a compile error with W=1.
Cc: Christophe Leroy
Signed-off-by: Cédric Le Goater
---
I don't think this is correct. Which file could we use ?
I think you can completely remov
40x and BOOKE don't have MSR_RI.
Define MSR_RI only for platforms where it exists. For the other ones,
defines it as BUILD_BUG for C and do not define it for ASM.
Signed-off-by: Christophe Leroy
---
v3: Fixes kvm_emul.S and include in
---
arch/powerpc/include/asm/reg.h | 5 +
arch/
40x and BOOKE don't have MSR_RI therefore all tests involving
MSR_RI may be problematic on those plateforms.
Create helpers to check or set MSR_RI in regs, and use them
in common code.
Signed-off-by: Christophe Leroy
---
v2: Remove superflous {
---
arch/powerpc/include/asm/ptrace.h
In those hot functions that are called at every interrupt, any saved
cycle is worth it.
interrupt_exit_user_prepare() and interrupt_exit_kernel_prepare() are
called from three places:
- From entry_32.S
- From interrupt_64.S
- From interrupt_exit_user_restart() and interrupt_exit_kernel_restart()
__NR_exit is nowhere used. On most architectures it was removed by
commit 135ab6ec8fda ("[PATCH] remove remaining errno and
__KERNEL_SYSCALLS__ references") but not on powerpc.
powerpc removed __KERNEL_SYSCALLS__ in commit 3db03b4afb3e ("[PATCH]
rename the provided execve functions to kernel_execv
Commit e65e1fc2d24b ("[PATCH] syscall class hookup for all normal
targets") added generic support for AUDIT but that didn't include
support for bi-arch like powerpc.
Commit 4b58841149dc ("audit: Add generic compat syscall support")
added generic support for bi-arch.
Convert powerpc to that bi-arc
Use bcl 20,31,+4 instead of bl in order to preserve link stack.
See commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption
in __get_datapage()") for details.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/misc_32.S| 2 +-
arch/powerpc/kernel/reloc_32.S | 2 +-
arch/pow
Use bcl 20,31,+4 instead of bl in order to preserve link stack.
See commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption
in __get_datapage()") for details.
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/ppc_asm.h| 2 +-
arch/powerpc/kernel/exceptions-64e.S
Use bcl 20,31,+4 instead of bl in order to preserve link stack.
See commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption
in __get_datapage()") for details.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/misc_64.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --
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