MPC8544 DS
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0-rc7-next-20220518 #1
NIP: c001b580 LR: c001b560 CTR: 0003
REGS: c5107dd0 TRAP: 0300 Not tainted (5.18.0-rc7-next-20220518)
MSR: 9000 CR: 24000882 XER:
DEAR: c122eb34 ESR: 0080
GPR00: c001b560
On Wed, May 18, 2022 at 10:11:03PM +0100, Mark Cave-Ayland wrote:
> On 18/05/2022 19:30, Thomas Zimmermann wrote:
>
> > Open Firmware provides basic display output via the 'display' node.
> > DT platform code already provides a device that represents the node's
> > framebuffer. Add a DRM driver fo
rea, sig: 11 [#1]
> BE PAGE_SIZE=4K MPC8544 DS
> Modules linked in:
> CPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0-rc7-next-20220518 #1
> NIP: c001b580 LR: c001b560 CTR: 0003
> REGS: c5107dd0 TRAP: 0300 Not tainted (5.18.0-rc7-next-20220518)
> MSR: 9000 CR:
"Naveen N. Rao" writes:
> Since commit d1bcae833b32f1 ("ELF: Don't generate unused section
> symbols") [1], binutils (v2.36+) started dropping section symbols that
> it thought were unused. This isn't an issue in general, but with
> kexec_file.c, gcc is placing kexec_arch_apply_relocations[_add]
On 18/05/2022 04:33, Petr Mladek wrote:
> [...]
> Anyway, I would distinguish it the following way.
>
> + If the notifier is preserving kernel log then it should be ideally
> treated as kmsg_dump().
>
> + It the notifier is saving another debugging data then it better
> fits into the
On 18/05/2022 04:58, Petr Mladek wrote:
> [...]
>> I does similar things like kmsg_dump() so it should be called in
>> the same location (after info notifier list and before kdump).
>>
>> A solution might be to put it at these notifiers at the very
>> end of the "info" list or make extra "dump" not
On 18/05/2022 04:38, Petr Mladek wrote:
> [...]
> I have answered this in more detail in the other reply, see
> https://lore.kernel.org/r/YoShZVYNAdvvjb7z@alley
>
> I agree that both notifiers in
>
> drivers/soc/bcm/brcmstb/pm/pm-arm.c
> drivers/firmware/google/gsmi.c
>
> better fit into
Hi Eric,
On 05/18/22 at 04:59pm, Eric W. Biederman wrote:
> "Naveen N. Rao" writes:
>
> > Since commit d1bcae833b32f1 ("ELF: Don't generate unused section
> > symbols") [1], binutils (v2.36+) started dropping section symbols that
> > it thought were unused. This isn't an issue in general, but w
It also causes the qemu mpc8544ds emulation to crash.
BUG: Unable to handle kernel data access on write at 0xc122eb34
Faulting instruction address: 0xc001b580
Oops: Kernel access of bad area, sig: 11 [#1]
BE PAGE_SIZE=4K MPC8544 DS
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0
On Tue, May 17, 2022 at 10:32:09PM +1000, Michael Ellerman wrote:
> "Naveen N. Rao" writes:
> > Michael Ellerman wrote:
> >>
> >> diff --git a/arch/powerpc/kernel/vdso/gettimeofday.S
> >> b/arch/powerpc/kernel/vdso/gettimeofday.S
> >> index eb9c81e1c218..0aee255e9cbb 100644
> >> --- a/arch/powerp
"Naveen N. Rao" writes:
> Since commit d1bcae833b32f1 ("ELF: Don't generate unused section
> symbols") [1], binutils (v2.36+) started dropping section symbols that
> it thought were unused. This isn't an issue in general, but with
> kexec_file.c, gcc is placing kexec_arch_apply_relocations[_add]
On 18/05/2022 19:30, Thomas Zimmermann wrote:
Open Firmware provides basic display output via the 'display' node.
DT platform code already provides a device that represents the node's
framebuffer. Add a DRM driver for the device. The display mode and
color format is pre-initialized by the system
On Wed, 18 May 2022 23:48:28 +0530 "Naveen N. Rao"
wrote:
> Since commit d1bcae833b32f1 ("ELF: Don't generate unused section
> symbols") [1], binutils (v2.36+) started dropping section symbols that
> it thought were unused. This isn't an issue in general, but with
> kexec_file.c, gcc is placing
Hi Vaibhav,
On 5/18/2022 1:05 PM, Vaibhav Jain wrote:
Presently ima_get_kexec_buffer() doesn't check if the previous kernel's
ima-kexec-buffer lies outside the addressable memory range. This can result
in a kernel panic if the new kernel is booted with 'mem=X' arg and the
ima-kexec-buffer was al
Presently ima_get_kexec_buffer() doesn't check if the previous kernel's
ima-kexec-buffer lies outside the addressable memory range. This can result
in a kernel panic if the new kernel is booted with 'mem=X' arg and the
ima-kexec-buffer was allocated beyond that range by the previous kernel.
The pan
Hello,
On Wed, May 18, 2022 at 08:30:06PM +0200, Thomas Zimmermann wrote:
> Open Firmware provides basic display output via the 'display' node.
> DT platform code already provides a device that represents the node's
> framebuffer. Add a DRM driver for the device. The display mode and
> color forma
Open Firmware provides basic display output via the 'display' node.
DT platform code already provides a device that represents the node's
framebuffer. Add a DRM driver for the device. The display mode and
color format is pre-initialized by the system's firmware. Runtime
modesetting via DRM is not p
There will be more DRM drivers for firmware-provided framebuffers. Use
the existing entry for simpledrm instead of adding a new one for each
driver. Also add DRM's aperture helpers, which are part of the driver's
infrastructure.
Signed-off-by: Thomas Zimmermann
---
MAINTAINERS | 4 +++-
1 file c
PowerPC's Open Firmware offers a simple display buffer for graphics
output. Add ofdrm, a DRM driver for the device. As with the existing
simpledrm driver, the graphics hardware is pre-initialized by the
firmware. The driver only provides blitting, no actual DRM modesetting
is possible.
Thomas Zimm
Since commit d1bcae833b32f1 ("ELF: Don't generate unused section
symbols") [1], binutils (v2.36+) started dropping section symbols that
it thought were unused. This isn't an issue in general, but with
kexec_file.c, gcc is placing kexec_arch_apply_relocations[_add] into a
separate .text.unlikely se
On 16/05/2022 15:17, Michael Ellerman wrote:
Arnout Vandecappelle writes:
On 10/05/2022 04:20, Joel Stanley wrote:
The default defconfig target for the 64 bit powerpc kernel is
ppc64_defconfig, the big endian configuration.
When building for powerpc64le users want the little endian kernel
Christophe Leroy wrote:
Le 18/05/2022 à 14:03, Michael Ellerman a écrit :
Michael Ellerman writes:
"Naveen N. Rao" writes:
Christophe Leroy wrote:
A lot of #ifdefs can be replaced by IS_ENABLED()
Do so.
This requires to have kernel_toc_addr() defined at all time
as well as PPC_INST_LD_T
Eric W. Biederman wrote:
Michael Ellerman writes:
"Eric W. Biederman" writes:
Looking at this the pr_err is absolutely needed. If an unsupported case
winds up in the purgatory blob and the code can't handle it things
will fail silently much worse later.
It won't fail later, it will fail t
tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
next-test
branch HEAD: 2e4a9942261f89ad204a8189634029a4b1f0efb6 powerpc/irq: Remove
arch_local_irq_restore() for !CONFIG_CC_HAS_ASM_GOTO
Error/Warning reports:
https://lore.kernel.org/linuxppc-dev/202205180129.raxtj
Michael Ellerman writes:
> "Eric W. Biederman" writes:
>> Looking at this the pr_err is absolutely needed. If an unsupported case
>> winds up in the purgatory blob and the code can't handle it things
>> will fail silently much worse later.
>
> It won't fail later, it will fail the syscall.
>
>
Rather than waiting for the bots to fix these one-by-one, fix all
occurences of "the the" throughout arch/powerpc.
Signed-off-by: Michael Ellerman
---
arch/powerpc/boot/wrapper | 2 +-
arch/powerpc/kernel/eeh_pe.c | 2 +-
arch/powerpc/kernel/head_64.S
CONFIG_VIRT_CPU_ACCOUNTING_GEN under pseries does not implement
stolen time accounting. Implement it with the paravirt time
accounting option.
Signed-off-by: Nicholas Piggin
---
.../admin-guide/kernel-parameters.txt | 6 +++---
arch/powerpc/include/asm/paravirt.h | 12
PAPR specifies accumulated virtual processor wait intervals that relate
to partition scheduling interval times. Implement these counters in the
same way as they are repoted by dtl.
Signed-off-by: Nicholas Piggin
---
arch/powerpc/kvm/book3s_hv.c | 62
1 file c
The hypervisor exposes accumulated partition scheduling interval times
in the VPA (lppaca). These can be used to implement a simple stolen time
in the guest without complex and costly dtl scanning.
Signed-off-by: Nicholas Piggin
---
arch/powerpc/include/asm/lppaca.h | 10 +++---
1 file chang
Stolen time logging in dtl was removed from the P9 path, so guests had
no stolen time accounting. Add it back in a simpler way that still
avoids locks and per-core accounting code.
Fixes: ecb6a7207f92 ("KVM: PPC: Book3S HV P9: Remove most of the vcore logic")
Signed-off-by: Nicholas Piggin
---
a
Le 18/05/2022 à 12:03, Paul Mackerras a écrit :
> This patch series implements KASAN on 64-bit POWER with radix MMU,
> such as POWER9 or POWER10. Daniel Axtens posted previous versions of
> these patches, but is no longer working on KASAN, and I have been
> asked to get them ready for inclusion.
Le 18/05/2022 à 15:21, Arnd Bergmann a écrit :
> On Wed, May 18, 2022 at 2:00 PM Michael Ellerman wrote:
>>
>> Christophe Leroy writes:
>>> Le 05/05/2022 à 14:51, Michael Ellerman a écrit :
Other arches (sh, mips, hexagon) use standard names for PAGE_SIZE
related config symbols.
Kajol Jain writes:
> Patch series extends the perf interface selftests
> to cover scenarios for event code checking,
> group constraints, and also thresholding/branch related
> interface tests in sampling area.
There are build failures in CI:
https://github.com/ruscur/linux-ci/actions/runs/231
On Wed, May 18, 2022 at 2:00 PM Michael Ellerman wrote:
>
> Christophe Leroy writes:
> > Le 05/05/2022 à 14:51, Michael Ellerman a écrit :
> >> Other arches (sh, mips, hexagon) use standard names for PAGE_SIZE
> >> related config symbols.
> >>
> >> Add matching symbols for powerpc, which are enab
Athira Rajeev writes:
> "perf all PMU test" picks the input events from
> "perf list --raw-dump pmu" list and runs "perf stat -e"
> for each of the event in the list. In case of powerpc, the
> PowerVM environment supports events from hv_24x7 and hv_gpci
> PMU which is of example format like below:
Christophe Leroy writes:
> Le 05/05/2022 à 14:51, Michael Ellerman a écrit :
>> Other arches (sh, mips, hexagon) use standard names for PAGE_SIZE
>> related config symbols.
>>
>> Add matching symbols for powerpc, which are enabled by default but
>> depend on our architecture specific PAGE_SIZE sy
Nicholas Piggin writes:
> Implement the AT_MINSIGSTKSZ AUXV entry, allowing userspace to
> dynamically size stack allocations in a manner forward-compatible with
> new processor state saved in the signal frame
>
> For now these statically find the maximum signal frame size rather than
> doing any
Le 18/05/2022 à 14:03, Michael Ellerman a écrit :
> Michael Ellerman writes:
>> "Naveen N. Rao" writes:
>>> Christophe Leroy wrote:
A lot of #ifdefs can be replaced by IS_ENABLED()
Do so.
This requires to have kernel_toc_addr() defined at all time
as well as PPC_IN
Le 18/05/2022 à 13:19, Michael Ellerman a écrit :
> "Naveen N. Rao" writes:
>> Christophe Leroy wrote:
>>> A lot of #ifdefs can be replaced by IS_ENABLED()
>>>
>>> Do so.
>>>
>>> This requires to have kernel_toc_addr() defined at all time
>>> as well as PPC_INST_LD_TOC and PPC_INST_STD_LR.
>>>
>
Michael Ellerman writes:
> "Naveen N. Rao" writes:
>> Christophe Leroy wrote:
>>> A lot of #ifdefs can be replaced by IS_ENABLED()
>>>
>>> Do so.
>>>
>>> This requires to have kernel_toc_addr() defined at all time
>>> as well as PPC_INST_LD_TOC and PPC_INST_STD_LR.
>>>
>>> Signed-off-by: Chris
On Mon, May 16, 2022 at 2:17 PM Michael Ellerman wrote:
> Having said that I think we could handle this better in the powerpc
> kernel. Other arches allow specifying a different value for ARCH, which
> then is fed into the defconfig.
>
> That way you could at least pass ARCH=ppc/ppc64/ppc64le, and
"Naveen N. Rao" writes:
> Christophe Leroy wrote:
>> A lot of #ifdefs can be replaced by IS_ENABLED()
>>
>> Do so.
>>
>> This requires to have kernel_toc_addr() defined at all time
>> as well as PPC_INST_LD_TOC and PPC_INST_STD_LR.
>>
>> Signed-off-by: Christophe Leroy
>> ---
>> v2: Moved the
On 05/18/22 at 02:48pm, Naveen N. Rao wrote:
> Baoquan He wrote:
> > On 05/18/22 at 12:26pm, Michael Ellerman wrote:
> > >
> > > It seems that recordmcount is not really maintained anymore now that x86
> > > uses objtool?
> > >
> > > There've been several threads about fixing recordmcount, but no
Le 18/05/2022 à 11:45, Naveen N. Rao a écrit :
> Christophe Leroy wrote:
>> A lot of #ifdefs can be replaced by IS_ENABLED()
>>
>> Do so.
>>
>> This requires to have kernel_toc_addr() defined at all time
>> as well as PPC_INST_LD_TOC and PPC_INST_STD_LR.
>>
>> Signed-off-by: Christophe Leroy
>>
From: Daniel Axtens
Implement a limited form of KASAN for Book3S 64-bit machines running under
the Radix MMU, supporting only outline mode.
- Enable the compiler instrumentation to check addresses and maintain the
shadow region. (This is the guts of KASAN which we can easily reuse.)
- Requ
From: Daniel Axtens
KASAN is supported on 32-bit powerpc and the docs should reflect this.
Suggested-by: Christophe Leroy
Reviewed-by: Christophe Leroy
Signed-off-by: Daniel Axtens
Signed-off-by: Paul Mackerras
---
Documentation/powerpc/kasan.txt | 12
1 file changed, 12 insert
From: Daniel Axtens
kasan is already implied by the directory name, we don't need to
repeat it.
Suggested-by: Christophe Leroy
Signed-off-by: Daniel Axtens
Signed-off-by: Paul Mackerras
---
arch/powerpc/mm/kasan/Makefile | 2 +-
arch/powerpc/mm/kasan/{kasan_init_32.c =>
From: Daniel Axtens
Signed-off-by: Paul Mackerras
---
Documentation/dev-tools/kasan.rst | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/Documentation/dev-tools/kasan.rst
b/Documentation/dev-tools/kasan.rst
index 8089c559d339..448995c11bee 100644
--- a/Documentation/de
This patch series implements KASAN on 64-bit POWER with radix MMU,
such as POWER9 or POWER10. Daniel Axtens posted previous versions of
these patches, but is no longer working on KASAN, and I have been
asked to get them ready for inclusion.
Because of various technical difficulties, mostly around
From: Daniel Axtens
Disable address sanitization for raw and non-maskable interrupt
handlers, because they can run in real mode, where we cannot access
the shadow memory. (Note that kasan_arch_is_ready() doesn't test for
real mode, since it is a static branch for speed, and in any case not
all t
From: Daniel Axtens
The kexec code paths involve code that necessarily run in real mode,
as CPUs are disabled and control is transferred to the new kernel.
Disable address sanitization for the kexec code and the functions
called in real mode on CPUs being disabled.
[pau...@ozlabs.org: combined a
Michael Ellerman wrote:
"Naveen N. Rao" writes:
Michael Ellerman wrote:
diff --git a/arch/powerpc/kernel/vdso/gettimeofday.S
b/arch/powerpc/kernel/vdso/gettimeofday.S
index eb9c81e1c218..0aee255e9cbb 100644
--- a/arch/powerpc/kernel/vdso/gettimeofday.S
+++ b/arch/powerpc/kernel/vdso/gettimeo
Christophe Leroy wrote:
A lot of #ifdefs can be replaced by IS_ENABLED()
Do so.
This requires to have kernel_toc_addr() defined at all time
as well as PPC_INST_LD_TOC and PPC_INST_STD_LR.
Signed-off-by: Christophe Leroy
---
v2: Moved the setup of pop outside of the big if()/else() in __ftrace
Le 05/05/2022 à 14:51, Michael Ellerman a écrit :
> Other arches (sh, mips, hexagon) use standard names for PAGE_SIZE
> related config symbols.
>
> Add matching symbols for powerpc, which are enabled by default but
> depend on our architecture specific PAGE_SIZE symbols.
>
> This allows generic
"perf all PMU test" picks the input events from
"perf list --raw-dump pmu" list and runs "perf stat -e"
for each of the event in the list. In case of powerpc, the
PowerVM environment supports events from hv_24x7 and hv_gpci
PMU which is of example format like below:
- hv_24x7/CPM_ADJUNCT_INST,domai
Baoquan He wrote:
On 05/18/22 at 12:26pm, Michael Ellerman wrote:
It seems that recordmcount is not really maintained anymore now that x86
uses objtool?
There've been several threads about fixing recordmcount, but none of
them seem to have lead to a solution.
These weak symbol vs recordmcount
Add ABI documentation for "caps" attribute group.
Some of the platform specific PMU features can be exposed
in "caps" attribute group/directory:
/sys/bus/event_source/devices//
Signed-off-by: Athira Rajeev
---
.../sysfs-bus-event_source-devices-caps| 18 ++
1 file changed
Add caps support under "/sys/bus/event_source/devices//"
for powerpc. This directory can be used to expose some of the
specific features that powerpc PMU supports to the user.
Example: pmu_name. The name of PMU registered will depend on
platform, say power9 or power10 or it could be Generic Compat
Use WRITE_ONCE() instead of opencoding the saving of current
stack pointeur.
Signed-off-by: Christophe Leroy
---
By the way, is WRITE_ONCE() needed at all ? Could we instead do
local_paca->saved_r1 = current_stack_pointer;
---
arch/powerpc/include/asm/hw_irq.h | 4 +---
1 file changed, 1 insert
Replace
#ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG and
#ifdef CONFIG_PERF_EVENTS
by IS_ENABLED() in hw_irq.h and plpar_wrappers.h
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/hw_irq.h | 30 +++
arch/powerpc/include/asm/plpar_wrappers.h | 5 ++--
2 file
Use READ_ONCE() and WRITE_ONCE() instead of open coding
read and write of local PACA irq_soft_mask.
For the write, add a barrier to keep the memory clobber
that was there previously.
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/hw_irq.h | 43 +--
1 fi
On 05/18/22 at 12:26pm, Michael Ellerman wrote:
> "Eric W. Biederman" writes:
> > Looking at this the pr_err is absolutely needed. If an unsupported case
> > winds up in the purgatory blob and the code can't handle it things
> > will fail silently much worse later.
>
> It won't fail later, it wi
More than half of irq.c is dedicated to PPC64.
Move PPC64 code out of irq.c into irq_64.c
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/Makefile| 2 +-
arch/powerpc/kernel/irq.c | 421
arch/powerpc/kernel/{irq.c => irq_64.c} | 331 -
No need to open code the read of local_paca->irq_happened in
assembly, we have READ_ONCE() for doing the same.
Replace get_irq_happened() by READ_ONCE(local_paca->irq_happened).
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/irq_64.c | 14 ++
1 file changed, 2 insertions(+)
64 matches
Mail list logo
