Christophe Leroy writes:
> Le 25/06/2021 à 06:45, Michael Ellerman a écrit :
>> Christophe Leroy writes:
>>> Hi Michael,
>>>
>>> Le 19/04/2021 à 12:47, Christophe Leroy a écrit :
Pagewalk ignores hugepd entries and walk down the tables
as if it was traditionnal entries, leading to crazy
On Thu 2021-06-24 17:41:56, John Ogness wrote:
> I would prefer a v4 with these fixes:
>
> - wrap @console_owner_lock with printk_safe usage
>
> - remove unnecessary printk_safe usage from printk_safe.c
>
> - update commit message to say that safe context tracking is left in
> place for both t
On Thu 2021-06-24 13:17:46, John Ogness wrote:
> All NMI contexts are handled the same as the safe context: store the
> message and defer printing. There is no need to have special NMI
> context tracking for this. Using in_nmi() is enough.
>
> Signed-off-by: John Ogness
> Reviewed-by: Petr Mladek
Test scenarios:
1. With 'perf list metric' and 'perf list metricgroup' - can see metrics
2. Run all the metrics with perf stat with -M option and --metric-only
-M option
The above test scenarios automated with avocado framework, pull request
title: perf_metric.py: Add perf metric test case
trap->regs == 0x3000 is trap_is_scv()
trap 0x500 is INTERRUPT_EXTERNAL
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/interrupt.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c
index 1b4a99ecb7e5
Hi Michael,
What happened to this series ? It has been flagged 'under review' in Patchwork since mid April but I
never saw it in next-test.
Thanks
Christophe
Le 12/04/2021 à 18:26, Christophe Leroy a écrit :
powerpc BUG_ON() and WARN_ON() are based on using twnei instruction.
For catching s
Reduce #ifdefs a bit by making exit_must_hard_disable() return
true on PPC32.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/interrupt.c | 8 +++-
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c
index ce
In raise_backtrace_ipi() we iterate through the cpumask of CPUs, sending
each an IPI asking them to do a backtrace, but we don't wait for the
backtrace to happen.
We then iterate through the CPU mask again, and if any CPU hasn't done
the backtrace and cleared itself from the mask, we print a trace
On Thu, Jun 24, 2021 at 6:41 AM Daniel Axtens wrote:
>
> Allow architectures to define a kasan_arch_is_ready() hook that bails
> out of any function that's about to touch the shadow unless the arch
> says that it is ready for the memory to be accessed. This is fairly
> uninvasive and should have a
On Thu, Jun 24, 2021 at 6:41 AM Daniel Axtens wrote:
>
> For annoying architectural reasons, it's very difficult to support inline
> instrumentation on powerpc64.*
>
> Add a Kconfig flag to allow an arch to disable inline. (It's a bit
> annoying to be 'backwards', but I'm not aware of any way to h
On Fri, Jun 25, 2021 at 02:36:23PM +0200, Petr Mladek wrote:
> On Thu 2021-06-24 13:17:46, John Ogness wrote:
> > All NMI contexts are handled the same as the safe context: store the
> > message and defer printing. There is no need to have special NMI
> > context tracking for this. Using in_nmi() i
On Fri, Jun 25, 2021 at 05:29:48PM +0530, Kajol Jain wrote:
> Patch adds 24x7 nest metric events for POWER10.
>
> Signed-off-by: Kajol Jain
> ---
> .../arch/powerpc/power10/nest_metrics.json| 491 ++
> 1 file changed, 491 insertions(+)
> create mode 100644
> tools/perf/pmu-
From: gushengxian
Remove an unneeded semicolon.
Signed-off-by: gushengxian
---
sound/soc/fsl/fsl_xcvr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/fsl/fsl_xcvr.c b/sound/soc/fsl/fsl_xcvr.c
index e34d57ad66fb..75fa8f1b5576 100644
--- a/sound/soc/fsl/fsl_xcvr.c
On Fri, Jun 25, 2021 at 12:16:52PM +0200, Peter Zijlstra wrote:
> You mean: CONFIG_PREEMPTION=n, what about CONFIG_PREEMPT_COUNT?
>
> Because if both are =n, then I don't see how that warning could trigger.
> in_atomic_preempt_off() would then result in prempt_count() == 0, and
> per the print abo
On Thu, Jun 24, 2021 at 03:19:48PM -0400, Konrad Rzeszutek Wilk wrote:
> On Thu, Jun 24, 2021 at 11:55:14PM +0800, Claire Chang wrote:
> > This series implements mitigations for lack of DMA access control on
> > systems without an IOMMU, which could result in the DMA accessing the
> > system memory
From: gushengxian
The print function dev_err() is redundant because
platform_get_irq() already prints an error.
Signed-off-by: gushengxian
---
sound/soc/fsl/fsl_xcvr.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/sound/soc/fsl/fsl_xcvr.c b/sound/soc/fsl/fsl_xcvr.c
ind
From: gushengxian
The print function dev_err() is redundant because
platform_get_irq() already prints an error.
Signed-off-by: gushengxian
---
sound/soc/fsl/fsl_spdif.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
Patch adds 24x7 nest metric events for POWER10.
Signed-off-by: Kajol Jain
---
.../arch/powerpc/power10/nest_metrics.json| 491 ++
1 file changed, 491 insertions(+)
create mode 100644 tools/perf/pmu-events/arch/powerpc/power10/nest_metrics.json
diff --git a/tools/perf/pmu-ev
From: gushengxian
The print function dev_err() is redundant because
platform_get_irq() already prints an error.
Signed-off-by: gushengxian
---
sound/soc/fsl/fsl_easrc.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/sound/soc/fsl/fsl_easrc.c b/sound/soc/fsl/fsl_easrc.c
regs_set_return_msr() and regs_set_return_ip() have a copy
of the code of set_return_regs_changed().
Call the later instead.
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/ptrace.h | 10 ++
1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/include/
regs_set_return_msr() and regs_set_return_ip() have a copy
of the code of set_return_regs_changed().
Move up set_return_regs_changed() so it can be reused by
regs_set_return_{msr/ip}
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/ptrace.h | 10 +-
1 file changed, 5 inserti
When shift is nul, operations remain valid so no test needed.
And 'ret' is unnecessary.
And use IS_ALIGNED() to check alignment, that's more clear.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/syscalls.c | 15 ---
1 file changed, 4 insertions(+), 11 deletions(-)
diff --
The signal trampoline is either:
- As specified by the caller via SA_RESTORER
- In VDSO if VDSO is properly mapped
- Fallback on user stack
However, nowadays user stack is mapped non executable by default
so the fallback will generate an exec fault.
All other architectures having VDSO except x86
powerpc advertises support of SA_RESTORER sigaction flag.
Make it the truth.
Cc: sta...@vger.kernel.org
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/signal_32.c | 8 ++--
arch/powerpc/kernel/signal_64.c | 4 +++-
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/arch
Le 29/04/2021 à 10:06, Arnd Bergmann a écrit :
From: Arnd Bergmann
gcc-11 points out that modifying local variables next to a
longjmp/setjmp may cause undefined behavior:
arch/powerpc/kexec/crash.c: In function 'crash_kexec_prepare_cpus.constprop':
arch/powerpc/kexec/crash.c:108:22: error:
allnoconfig
x86_64 randconfig-a002-20210625
x86_64 randconfig-a001-20210625
x86_64 randconfig-a005-20210625
x86_64 randconfig-a003-20210625
x86_64 randconfig-a004-20210625
x86_64 randconfig-a006-20210625
defconfig
mips allyesconfig
mips allmodconfig
powerpc allyesconfig
powerpc allmodconfig
powerpc allnoconfig
x86_64 randconfig-a002-20210625
x86_64
On Fri, Jun 25, 2021 at 02:23:16PM +0530, Bharata B Rao wrote:
> On Fri, Jun 25, 2021 at 09:28:09AM +0200, Peter Zijlstra wrote:
> > On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
> > > * Bharata B Rao [2021-06-24 21:25:09]:
> > >
> > > > A PowerPC KVM guest gets the following
On 25/06/21 09:28, Peter Zijlstra wrote:
> On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
>> Bharata,
>>
>> I think the regression is due to Commit f1a0a376ca0c ("sched/core:
>> Initialize the idle task with preemption disabled")
>
> So that extra preempt_disable() that got remo
On Fri, Jun 25, 2021 at 09:28:09AM +0200, Peter Zijlstra wrote:
> On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
> > * Bharata B Rao [2021-06-24 21:25:09]:
> >
> > > A PowerPC KVM guest gets the following BUG message when booting
> > > linux-next-20210623:
> > >
> > > smp: Br
On 25/06/21 09:58, Christian Borntraeger wrote:
On 25.06.21 09:36, David Stevens wrote:
From: Nicholas Piggin
It's possible to create a region which maps valid but non-refcounted
pages (e.g., tail pages of non-compound higher order allocations). These
host pages can then be returned by gfn_t
On 25.06.21 09:36, David Stevens wrote:
From: Nicholas Piggin
It's possible to create a region which maps valid but non-refcounted
pages (e.g., tail pages of non-compound higher order allocations). These
host pages can then be returned by gfn_to_page, gfn_to_pfn, etc., family
of APIs, which
On 24.06.21 14:57, Nicholas Piggin wrote:
Excerpts from Paolo Bonzini's message of June 24, 2021 10:41 pm:
On 24/06/21 13:42, Nicholas Piggin wrote:
Excerpts from Nicholas Piggin's message of June 24, 2021 8:34 pm:
Excerpts from David Stevens's message of June 24, 2021 1:57 pm:
KVM support
From: David Stevens
Remove two warnings that require ref counts for pages to be non-zero, as
mapped pfns from follow_pfn may not have an initialized ref count.
Signed-off-by: David Stevens
---
arch/x86/kvm/mmu/mmu.c | 7 ---
virt/kvm/kvm_main.c| 2 +-
2 files changed, 1 insertion(+), 8
From: David Stevens
Covert usages of the deprecated gfn_to_pfn functions to the new
gfn_to_pfn_page functions.
Signed-off-by: David Stevens
---
arch/arm64/kvm/mmu.c | 26 --
1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm6
From: David Stevens
Covert usages of the deprecated gfn_to_pfn functions to the new
gfn_to_pfn_page functions.
Signed-off-by: David Stevens
---
arch/x86/kvm/mmu/mmu.c | 43 -
arch/x86/kvm/mmu/mmu_internal.h | 3 ++-
arch/x86/kvm/mmu/paging_tmpl.h | 23
From: David Stevens
Introduce new gfn_to_pfn_page functions that parallel existing
gfn_to_pfn functions. The new functions are identical except they take
an additional out parameter that is used to return the struct page if
the hva was resolved by gup. This allows callers to differentiate the
gup
From: Nicholas Piggin
It's possible to create a region which maps valid but non-refcounted
pages (e.g., tail pages of non-compound higher order allocations). These
host pages can then be returned by gfn_to_page, gfn_to_pfn, etc., family
of APIs, which take a reference to the page, which takes it
KVM supports mapping VM_IO and VM_PFNMAP memory into the guest by using
follow_pte in gfn_to_pfn. However, the resolved pfns may not have
assoicated struct pages, so they should not be passed to pfn_to_page.
This series removes such calls from the x86 and arm64 secondary MMU. To
do this, this serie
On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
> * Bharata B Rao [2021-06-24 21:25:09]:
>
> > A PowerPC KVM guest gets the following BUG message when booting
> > linux-next-20210623:
> >
> > smp: Bringing up secondary CPUs ...
> > BUG: scheduling while atomic: swapper/1/0/0x0
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