From: Zhouyi Zhou
During the cpu offlining, the sub functions of xive_teardown_cpu will
call __lock_acquire when CONFIG_LOCKDEP=y. The latter function will
travel RCU protected list, so "WARNING: suspicious RCU usage" will be
triggered.
Try to protect cpu offlining by RCU offline lock.
Tested o
During the cpu offlining, the sub functions of xive_teardown_cpu will
call __lock_acquire when CONFIG_LOCKDEP=y. The latter function will
travel RCU protected list, so "WARNING: suspicious RCU usage" will be
triggered.
Try to protect cpu offlining by RCU offline lock.
Tested on PPC VM of Open Sou
Hi Josh,
On 9/9/22 11:07, Josh Poimboeuf wrote:
Hi,
Here's a preview of what I'm planning to discuss at the LPC toolchains
microconference. Feel free to start the discussion early :-)
This is a proposal for some new minor GCC/Clang features which would
help objtool greatly.
Background
-
On Tue, Sep 13, 2022 at 04:13:52PM +0200, Peter Zijlstra wrote:
> On Mon, Sep 12, 2022 at 01:50:04PM +0530, Sathvika Vasireddy wrote:
> > Christophe Leroy (4):
> > objtool: Fix SEGFAULT
> > objtool: Use target file endianness instead of a compiled constant
> > objtool: Use target file class s
On Tue, Sep 13, 2022 at 03:51:44PM -0700, Indu Bhagat wrote:
> Curious to know what all features of objtool rely on the need to reverse
> engineer the control flow graph. Is it a larger set or it is only for ORC
> generation ?
Objtool features which rely on the CFG:
- Frame pointer rule validatio
On Mon, Sep 12, 2022 at 02:17:36PM +, Michael Matz wrote:
> Hey,
Hi Michael,
Thanks for looking at this.
> On Mon, 12 Sep 2022, Borislav Petkov wrote:
>
> > Micha, any opinions on the below are appreciated.
> >
> > On Fri, Sep 09, 2022 at 11:07:04AM -0700, Josh Poimboeuf wrote:
>
> > > di
On 09-09-22, 11:05, Sean Anderson wrote:
>
> I noticed in patchwork [1] that this entire series is marked as "Changes
> Requested," despite having received only automated feedback on one patch
> in the series. I am concerned about this because last time this occurred
> [2], the series received no
On Mon, 2022-09-12 at 14:58 -0500, Nathan Lynch wrote:
> Leonardo Brás writes:
> > On Fri, 2022-09-09 at 09:04 -0500, Nathan Lynch wrote:
> > > Leonardo Brás writes:
> > > > On Wed, 2022-09-07 at 17:01 -0500, Nathan Lynch wrote:
> > > > > At the time this was submitted by Leonardo, I confirmed --
Michal Suchánek writes:
> On Tue, Sep 13, 2022 at 10:59:56AM -0500, Nathan Lynch wrote:
>> Michal Suchánek writes:
>>
>> > On Fri, Aug 12, 2022 at 02:14:21PM -0500, Nathan Lynch wrote:
>> >> Laurent Dufour writes:
>> >> > Le 30/07/2022 à 02:04, Nathan Lynch a écrit :
>> >> >> +static long lparc
On Tue, Sep 13, 2022 at 10:59:56AM -0500, Nathan Lynch wrote:
> Michal Suchánek writes:
>
> > On Fri, Aug 12, 2022 at 02:14:21PM -0500, Nathan Lynch wrote:
> >> Laurent Dufour writes:
> >> > Le 30/07/2022 à 02:04, Nathan Lynch a écrit :
> >> >> +static long lparctl_get_sysparm(struct lparctl_get
Michal Suchánek writes:
> On Fri, Aug 12, 2022 at 02:14:21PM -0500, Nathan Lynch wrote:
>> Laurent Dufour writes:
>> > Le 30/07/2022 à 02:04, Nathan Lynch a écrit :
>> >> +static long lparctl_get_sysparm(struct lparctl_get_system_parameter
>> >> __user *argp)
>> >> +{
>> >> + struct lparctl_get
Le 13/09/2022 à 03:21, Rohan McLure a écrit :
>
>
>> On 12 Sep 2022, at 4:11 pm, Christophe Leroy
>> wrote:
>>
>>
>>
>> Le 12/09/2022 à 03:47, Rohan McLure a écrit :
>>> On creation and clearing of a page table mapping, instrument such calls
>>> by invoking page_table_check_pte_set and page_t
On Mon, Sep 12, 2022 at 01:50:04PM +0530, Sathvika Vasireddy wrote:
> Christophe Leroy (4):
> objtool: Fix SEGFAULT
> objtool: Use target file endianness instead of a compiled constant
> objtool: Use target file class size instead of a compiled constant
> Sathvika Vasireddy (12):
> objtool
Le 12/09/2022 à 03:47, Rohan McLure a écrit :
> Add the following helpers for detecting whether a page table entry
> is a leaf and is accessible to user space.
>
> * pte_user_accessible_page
> * pmd_user_accessible_page
> * pud_user_accessible_page
>
> The heavy lifting is done by pte_use
On Tue, Sep 13, 2022 at 12:21:51PM +, Christophe Leroy wrote:
> > Like mentioned last time; I'm fixing this (but you're right to not wait
> > on that), that said, would it make sense to write it like:
> >
> > #define __ALIGN .balign 4
> > #define __ALIGN_STR __stringify(__ALIGN)
>
Ping? It's been a while and probably got lost :-/
On 18/05/2022 16:27, Alexey Kardashevskiy wrote:
On 5/4/22 17:48, Alexey Kardashevskiy wrote:
When introduced, IRQFD resampling worked on POWER8 with XICS. However
KVM on POWER9 has never implemented it - the compatibility mode code
("XICS-on-
In interrupt_64.S, formerly entry_64.S, there are two toc entries
created for sys_call_table and compat_sys_call_table.
These are no longer used, since the system call entry was converted from
asm to C, so remove them.
Fixes: 68b34588e202 ("powerpc/64/sycall: Implement syscall entry/exit logic in
Le 13/09/2022 à 08:11, Christophe Leroy a écrit :
Le 12/09/2022 à 23:16, Pali Rohár a écrit :
My guess would be that something went wrong in the linear map setup,
but it
won't hurt running with "memblock=debug" added to the kernel command
line
to see if there is anything suspicious ther
Le 13/09/2022 à 14:03, Peter Zijlstra a écrit :
> On Mon, Sep 12, 2022 at 01:50:06PM +0530, Sathvika Vasireddy wrote:
>> In a subsequent patch, we would want to annotate powerpc assembly functions
>> with SYM_FUNC_START_LOCAL macro. This macro depends on __ALIGN macro.
>>
>> The default expansion
On Mon, Sep 12, 2022 at 01:50:06PM +0530, Sathvika Vasireddy wrote:
> In a subsequent patch, we would want to annotate powerpc assembly functions
> with SYM_FUNC_START_LOCAL macro. This macro depends on __ALIGN macro.
>
> The default expansion of __ALIGN macro is:
> #define __ALIGN .a
The perf probe related tests like probe_vfs_getname.sh which
is in "tools/perf/tests/shell" directory have dependency on
debuginfo information in the kernel. Currently debuginfo
check is handled by skip_if_no_debuginfo function in the
file "lib/probe_vfs_getname.sh". skip_if_no_debuginfo function
l
perf stat includes option to specify aggr_mode to display
per-socket, per-core, per-die, per-node counter details.
Also there is option -A ( AGGR_NONE, -no-aggr ), where the
counter values are displayed for each cpu along with "CPU"
value in one field of the output.
Each of the aggregate mode uses
For PERF_SAMPLE_BRANCH_STACK sample type, different branch_sample_type,
ie branch filters are supported. The testcase "bhrb_filter_map_test"
tests the valid and invalid filter maps in different powerpc platforms.
Update this testcase to include scenario to cover multiple branch
filters at sametime.
For PERF_SAMPLE_BRANCH_STACK sample type, different branch_sample_type
ie branch filters are supported. The branch filters are requested via
event attribute "branch_sample_type". Multiple branch filters can be
passed in event attribute.
Example:
perf record -b -o- -B --branch-filter any,ind_call t
commit b55878c90ab9 ("perf test: Add test for branch stack sampling")
added test for branch stack sampling. There is a sanity check in the
beginning to skip the test if the hardware doesn't support branch stack
sampling.
Snippet
<<>>
skip the test if the hardware doesn't support branch stack sampl
> On 12-Sep-2022, at 12:20 PM, Hari Bathini wrote:
>
> Since commit e641eb03ab2b0 ("powerpc: Fix up the kdump base cap to
> 128M") memory for kdump kernel has been reserved at an offset of
> 128MB. This held up well for a long time before running into boot
> failure on LPARs having a lot of co
Le 12/09/2022 à 10:20, Sathvika Vasireddy a écrit :
> This patch enables objtool --mcount on powerpc, and adds implementation
> specific to powerpc.
>
> Signed-off-by: Sathvika Vasireddy
> ---
> arch/powerpc/Kconfig | 1 +
> tools/objtool/arch/powerpc/decode.c
On 13.9.2022 8.22, Alistair Popple wrote:
As noted by John Hubbard the original test relied on side effects of the
implementation of migrate_vma_setup() to detect if pages had been
swapped to disk or not. This is subject to change in future so
explicitly check for swap entries via pagemap inst
Le 12/09/2022 à 17:22, Christophe Leroy a écrit :
Le 12/09/2022 à 15:46, Lukas Bulwahn a écrit :
Hi Joe, hi Ben,
While reviewing some kernel config, I came across
CONFIG_DCACHE_WORD_ACCESS and tried to understand its purpose.
Then, I discovered this RFC patch from 2014 that seems never to
On Fri, Aug 12, 2022 at 02:14:21PM -0500, Nathan Lynch wrote:
> Laurent Dufour writes:
> > Le 30/07/2022 à 02:04, Nathan Lynch a écrit :
> >> +static long lparctl_get_sysparm(struct lparctl_get_system_parameter
> >> __user *argp)
> >> +{
> >> + struct lparctl_get_system_parameter *gsp;
> >> + l
As platform_driver_register() can return error numbers,
it should be better to return platform_driver_register()
instead of return 0.
Fixes: be7ecbd240b2 ("soc: fsl: qe: convert QE interrupt controller to
platform_device")
Signed-off-by: Jiasheng Jiang
---
drivers/soc/fsl/qe/qe_ic.c | 3 +--
1
David Hildenbrand writes:
> On 13.09.22 07:22, Alistair Popple wrote:
>> As noted by John Hubbard the original test relied on side effects of the
>> implementation of migrate_vma_setup() to detect if pages had been
>> swapped to disk or not. This is subject to change in future so
>> explicitly
Le 13/09/2022 à 09:40, Disha Goel a écrit :
> There were commits which did code refactoring and converting some of kvm
> assembly routines to C. When doing it, many of the asm-offset macro
> definitions were missed to remove. Patchset here removes those.
>
> Patch1 removes usage of KVM_TLB_SETS
On 13.09.22 07:22, Alistair Popple wrote:
As noted by John Hubbard the original test relied on side effects of the
implementation of migrate_vma_setup() to detect if pages had been
swapped to disk or not. This is subject to change in future so
explicitly check for swap entries via pagemap instead
From: Kajol Jain
Commit 57dc0eed73ca ("KVM: PPC: Book3S HV P9: Implement PMU save/restore
in C") removed the PMU save/restore functions from assembly code and
implemented these functions in C, for power9 and later platforms.
After the code refactoring, Performance Monitoring Unit (PMU) registers
Commit fae5c9f3664b ("KVM: PPC: Book3S HV: remove ISA v3.0 and v3.1
support from P7/8 path") moved code path for the kvm guest entry/exit
for p7/8 from aseembly to C. But the patch missed to remove the
asm-offset macro definitions which were used in the assembly files
and now they are un-used. Patc
Commit 9769a7fd79b6 ("KVM: PPC: Book3S HV: Remove radix
guest support from P7/8 path") removed the radix guest
support from P7/8 path since the P9 path now supports of
all the supported radix guest. But missed to remove
KVM_RADIX from the asm-offset. Patch fixes by removing it.
Fixes: 9769a7fd79b6
Commit 2e1ae9cd56f8 ("KVM: PPC: Book3S HV: Implement radix
prefetch workaround by disabling MMU") removed usage of
KVM_TLB_SETS macro as part of fixing radix prefetch workaround.
But the patch missed to remove the asm-offset macro definition
which was used in the assembly files and now this is un-u
There were commits which did code refactoring and converting some of kvm
assembly routines to C. When doing it, many of the asm-offset macro
definitions were missed to remove. Patchset here removes those.
Patch1 removes usage of KVM_TLB_SETS macro from the asm-offset
Patch2 removes KVM_RADIX macr
> > Add a string property to assign ASoC platform driver name. It also
> > represents the rpmsg channel this sound card sits on. This property
> > can be omitted if there is only one sound card and it sits on
> > "rpmsg-audio-channel".
> >
> > Signed-off-by: Chancel Liu
> > ---
> > .../devicetree
> On 12 Sep 2022, at 8:33 pm, Nicholas Piggin wrote:
>
> On Wed Aug 24, 2022 at 12:05 PM AEST, Rohan McLure wrote:
>> Forward declare all syscall handler prototypes where a generic prototype
>> is not provided in either linux/syscalls.h or linux/compat.h in
>> asm/syscalls.h. This is required
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