auxv_generic_compat_pmu() utility function is to detect whether the
system is having generic compat PMU. The check is based on base platform
value from /proc/self/auxv. Update the comment with details on how auxv
is used to detect the platform.
Signed-off-by: Athira Rajeev
---
Changelog:
v1 -> v
Some of the tests depends on pvr value to choose
the event. Example:
- event_alternatives_tests_p10: alternative event depends
on registered PMU driver which is based on pvr
- generic_events_valid_test varies based on platform
- bhrb_filter_map_test: again its dependent on pmu to
decide which b
Updated the comments in the pmu selftests to include
power11/ISA v3.1 where ever required.
Signed-off-by: Athira Rajeev
---
Changelog:
v1 -> v2
No code changes. Rebased to latest upstream
.../event_code_tests/group_constraint_l2l3_sel_test.c | 2 +-
.../group_constraint_radix_scope_qual_tes
During performance monitor interrupt handling, the regs are setup using
perf_read_regs function. Here some of the pt_regs fields is overloaded.
Samples Instruction Event Register (SIER) is loaded into pt_regs,
overloading regs->dar. And regs->dsisr to store MMCRA (Monitor Mode
Control Register A) s
perf mem report aborts as below sometimes (during some corner
case) in powerpc:
# ./perf mem report 1>out
*** stack smashing detected ***: terminated
Aborted (core dumped)
The backtrace is as below:
__pthread_kill_implementation ()
raise ()
abort ()
__libc_message
__fortif
On Sun, Jan 12, 2025 at 06:49:40PM -0800, Darrick J. Wong wrote:
> On Mon, Jan 13, 2025 at 11:57:18AM +1100, Alistair Popple wrote:
> > On Fri, Jan 10, 2025 at 08:50:19AM -0800, Darrick J. Wong wrote:
> > > On Fri, Jan 10, 2025 at 05:00:35PM +1100, Alistair Popple wrote:
> > > > File systems call d
On pSeries, when user attempts to use the same vfio container used by
different iommu group, the spapr_tce_set_window() returns -EPERM
and the subsequent cleanup leads to the below crash.
Kernel attempted to read user page (308) - exploit attempt?
BUG: Kernel NULL pointer dereference on read
Hi Andrey,
kernel test robot noticed the following build warnings:
[auto build test WARNING on brauner-vfs/vfs.all]
[also build test WARNING on geert-m68k/for-next powerpc/next powerpc/fixes
s390/features linus/master v6.13-rc6 next-20250110]
[cannot apply to geert-m68k/for-linus deller-parisc/f
On Fri, Jan 10, 2025 at 08:54:55AM -0800, Darrick J. Wong wrote:
> On Fri, Jan 10, 2025 at 05:00:49PM +1100, Alistair Popple wrote:
> > Currently fs dax pages are considered free when the refcount drops to
> > one and their refcounts are not increased when mapped via PTEs or
> > decreased when unma
On Mon, Jan 13, 2025 at 11:57:18AM +1100, Alistair Popple wrote:
> On Fri, Jan 10, 2025 at 08:50:19AM -0800, Darrick J. Wong wrote:
> > On Fri, Jan 10, 2025 at 05:00:35PM +1100, Alistair Popple wrote:
> > > File systems call dax_break_mapping() prior to reallocating file
> > > system blocks to ensu
On Mon, Jan 13, 2025 at 11:47:41AM +1100, Alistair Popple wrote:
> On Fri, Jan 10, 2025 at 08:44:38AM -0800, Darrick J. Wong wrote:
> > On Fri, Jan 10, 2025 at 05:00:33PM +1100, Alistair Popple wrote:
> > > Prior to freeing a block file systems supporting FS DAX must check
> > > that the associated
On Fri, Jan 10, 2025 at 05:24:48PM -0800, Sean Christopherson wrote:
>Add a kvm_run flag, KVM_RUN_NEEDS_COMPLETION, to communicate to userspace
>that KVM_RUN needs to be re-executed prior to save/restore in order to
>complete the instruction/operation that triggered the userspace exit.
>
>KVM's cur
On Fri, Jan 10, 2025 at 07:35:57PM -0800, Dan Williams wrote:
> Andrew Morton wrote:
> > On Thu, 9 Jan 2025 23:05:56 -0800 Dan Williams
> > wrote:
> >
> > > > - Remove PTE_DEVMAP definitions from Loongarch which were added since
> > > >this series was initially written.
> > > [..]
> > > >
On Fri, Jan 10, 2025 at 08:50:19AM -0800, Darrick J. Wong wrote:
> On Fri, Jan 10, 2025 at 05:00:35PM +1100, Alistair Popple wrote:
> > File systems call dax_break_mapping() prior to reallocating file
> > system blocks to ensure the page is not undergoing any DMA or other
> > accesses. Generally th
On Fri, Jan 10, 2025 at 08:44:38AM -0800, Darrick J. Wong wrote:
> On Fri, Jan 10, 2025 at 05:00:33PM +1100, Alistair Popple wrote:
> > Prior to freeing a block file systems supporting FS DAX must check
> > that the associated pages are both unmapped from user-space and not
> > undergoing DMA or ot
Hi Michael,
On Sat, 11 Jan 2025 10:57:38 +1100 Michael Ellerman wrote:
>
> Maddy is taking over the day-to-day maintenance of powerpc. I will still
> be around to help, and as a backup.
>
> Re-order the main POWERPC list to put Maddy first to reflect that.
>
> KVM/powerpc patches will be handle
Christophe Leroy writes:
> Rewrite __real_pte() and __rpte_to_hidx() as static inline in order to
> avoid following warnings/errors when building with 4k page size:
>
> CC arch/powerpc/mm/book3s64/hash_tlb.o
> arch/powerpc/mm/book3s64/hash_tlb.c: In function 'hpte_need_flush':
Rewrite __real_pte() and __rpte_to_hidx() as static inline in order to
avoid following warnings/errors when building with 4k page size:
CC arch/powerpc/mm/book3s64/hash_tlb.o
arch/powerpc/mm/book3s64/hash_tlb.c: In function 'hpte_need_flush':
arch/powerpc/mm/book3s64
Le 11/01/2025 à 18:03, Ritesh Harjani a écrit :
Christophe Leroy writes:
Rewrite __real_pte() as a static inline in order to avoid
following warning/error when building with 4k page size:
CC arch/powerpc/mm/book3s64/hash_tlb.o
arch/powerpc/mm/book3s64/hash_tlb.c: In
Use syscon_regmap_lookup_by_phandle_args() which is a wrapper over
syscon_regmap_lookup_by_phandle() combined with getting the syscon
argument. Except simpler code this annotates within one line that given
phandle has arguments, so grepping for code would be easier.
Signed-off-by: Krzysztof Kozlo
Use syscon_regmap_lookup_by_phandle_args() which is a wrapper over
syscon_regmap_lookup_by_phandle() combined with getting the syscon
argument. Except simpler code this annotates within one line that given
phandle has arguments, so grepping for code would be easier.
There is also no real benefit
-dra7xx.c | 27 ++-
drivers/pci/controller/dwc/pci-layerscape.c | 10 --
2 files changed, 10 insertions(+), 27 deletions(-)
---
base-commit: 2ddfbff29a2d45551e8c3e4f0c6b7c4618de24b7
change-id: 20250112-syscon-phandle-args-pci-d97537922ddd
Best regards
On 01/10/25 at 03:16pm, Joel Granados wrote:
...snip...
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index c0caa14880c3..71b0809e06d6 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -925,7 +925,7 @@ static int kexec_limit_handler(const struct ctl_table
> *table, i
The new __kvm_faultin_pfn() function is upset by the fact that e500 KVM
ignores host page permissions - __kvm_faultin requires a "writable"
outgoing argument, but e500 KVM is nonchalantly passing NULL.
If the host page permissions do not include writability, the shadow
TLB entry is forcibly mapped
e500 KVM tries to bypass __kvm_faultin_pfn() in order to map VM_PFNMAP
VMAs as huge pages. This is a Bad Idea because VM_PFNMAP VMAs could
become noncontiguous as a result of callsto remap_pfn_range().
Instead, use the already existing host PTE lookup to retrieve a
valid host-side mapping level a
Add the possibility of marking a page so that the UW and SW bits are
force-cleared. This is stored in the private info so that it persists
across multiple calls to kvmppc_e500_setup_stlbe.
Signed-off-by: Paolo Bonzini
---
arch/powerpc/kvm/e500.h | 2 ++
arch/powerpc/kvm/e500_mmu_host.
kvmppc_e500_ref_setup is returning whether the guest TLB entry is writable,
which is than passed to kvm_release_faultin_page. This makes little sense
for two reasons: first, because the function sets up the private data for
the page and the return value feels like it has been bolted on the side;
s
The new __kvm_faultin_pfn() function is upset by the fact that e500
KVM ignores host page permissions - __kvm_faultin requires a "writable"
outgoing argument, but e500 KVM is passing NULL.
While a simple fix would be possible that simply allows writable to
be NULL, it is quite ugly to have e500 KV
If find_linux_pte fails, IRQs will not be restored. This is unlikely
to happen in practice since it would have been reported as hanging
hosts, but it should of course be fixed anyway.
Cc: sta...@vger.kernel.org
Reported-by: Sean Christopherson
Signed-off-by: Paolo Bonzini
---
arch/powerpc/kvm/
As reported by the kernel test robot, the following error occurs:
arch/powerpc/lib/sstep.c: In function 'analyse_instr':
>> arch/powerpc/lib/sstep.c:1172:28: warning: variable 'suffix' set but not
>> used [-Wunused-but-set-variable]
1172 | unsigned int word, suffix;
|
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