On Mon, 2022-09-19 at 06:04 +, Christophe Leroy wrote:
> With CONFIG_STRICT_KERNEL_RWX, this patches causes a 15% time
> increase
> for activation/deactivation of ftrace.
It's possible that new alignment check is the cause. I'll see
> Without CONFIG_STRICT_KERNEL_RWX, it doesn't build.
Yup
Le 16/09/2022 à 08:23, Benjamin Gray a écrit :
>
> -static int do_patch_instruction(u32 *addr, ppc_inst_t instr)
> +static int patch_text(void *dest, const void *src, size_t size, bool is_exec)
> {
> int err;
> unsigned long flags;
>
> - /*
> - * During early early bo
Le 19/09/2022 à 03:44, Nicholas Miehlbradt a écrit :
> KFENCE support was added for ppc32 in commit 90cbac0e995d
> ("powerpc: Enable KFENCE for PPC32").
> Enable KFENCE on ppc64 architecture with hash and radix MMUs.
> It uses the same mechanism as debug pagealloc to
> protect/unprotect pages. Al
Le 19/09/2022 à 03:44, Nicholas Miehlbradt a écrit :
> [Vous ne recevez pas souvent de courriers de nicho...@linux.ibm.com.
> Découvrez pourquoi ceci est important à
> https://aka.ms/LearnAboutSenderIdentification ]
>
> There is support for DEBUG_PAGEALLOC on hash but not on radix.
> Add suppo
Le 16/09/2022 à 08:23, Benjamin Gray a écrit :
> Inserts a direct branch to the stub target when possible, replacing the
> mtctr/btctr sequence.
>
> The load into r12 could potentially be skipped too, but that change
> would need to refactor the arguments to indicate that the address
> does not
Le 16/09/2022 à 08:23, Benjamin Gray a écrit :
> The callee may set a field in `st_other` to 1 to indicate r2 should be
> treated as caller-saved. This means a trampoline must be used to save
> the current TOC before calling it and restore it afterwards, much like
> external calls.
>
> This is n
Le 16/09/2022 à 08:23, Benjamin Gray a écrit :
> Adds a generic text patching mechanism for patches of 1, 2, 4, or 8
> bytes. The patcher conditionally syncs the icache depending on if
> the content will be executed (as opposed to, e.g., read-only data).
>
> The `patch_instruction` function is r
se: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
> config: powerpc-microwatt_defconfig
> (https://download.01.org/0day-ci/archive/20220918/202209180437.4u3soljk-...@intel.com/config)
> compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project
> 791
On Mon, 2022-09-19 at 15:27 +1000, Michael Ellerman wrote:
> The original microwatt submission[1] included some early debug code
> for
> using the Microwatt "potato" UART.
>
> The series that was eventually merged switched to using a standard
> UART,
> and so doesn't need any special early debug h
The original microwatt submission[1] included some early debug code for
using the Microwatt "potato" UART.
The series that was eventually merged switched to using a standard UART,
and so doesn't need any special early debug handling. But some of the
original code was merged accidentally under the
On Mon, Sep 19, 2022 at 4:53 PM Barry Song <21cn...@gmail.com> wrote:
>
> On Mon, Sep 19, 2022 at 4:24 PM Anshuman Khandual
> wrote:
> >
> >
> >
> > On 9/15/22 12:12, Barry Song wrote:
> > > On Thu, Sep 15, 2022 at 6:07 PM Anshuman Khandual
> > > wrote:
> > >>
> > >>
> > >>
> > >> On 9/9/22 11:05
On Mon, Sep 19, 2022 at 4:24 PM Anshuman Khandual
wrote:
>
>
>
> On 9/15/22 12:12, Barry Song wrote:
> > On Thu, Sep 15, 2022 at 6:07 PM Anshuman Khandual
> > wrote:
> >>
> >>
> >>
> >> On 9/9/22 11:05, Barry Song wrote:
> >>> On Fri, Sep 9, 2022 at 5:24 PM Anshuman Khandual
> >>> wrote:
>
On 9/15/22 12:12, Barry Song wrote:
> On Thu, Sep 15, 2022 at 6:07 PM Anshuman Khandual
> wrote:
>>
>>
>>
>> On 9/9/22 11:05, Barry Song wrote:
>>> On Fri, Sep 9, 2022 at 5:24 PM Anshuman Khandual
>>> wrote:
On 8/22/22 13:51, Yicong Yang wrote:
> From: Barry Song
>
On 9/15/22 20:01, Nadav Amit wrote:
>
>
>> On Sep 14, 2022, at 11:42 PM, Barry Song <21cn...@gmail.com> wrote:
>>
>>>
>>> The very idea behind TLB deferral is the opportunity it (might) provide
>>> to accumulate address ranges and cpu masks so that individual TLB flush
>>> can be replaced with
During discussions of this series [1], it was suggested that hugetlb
handling code in follow_page_mask could be simplified. At the beginning
of follow_page_mask, there currently is a call to follow_huge_addr which
'may' handle hugetlb pages. ia64 is the only architecture which provides
a follow_h
From: Christophe Leroy
If the page is already mapped resp. already unmapped, bail out.
Signed-off-by: Christophe Leroy
Signed-off-by: Nicholas Miehlbradt
---
arch/powerpc/mm/book3s64/hash_utils.c | 8 +++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/book3s
From: Christophe Leroy
debug_pagealloc_enabled() is always defined and constant folds to
'false' when CONFIG_DEBUG_PAGEALLOC is not enabled.
Remove the #ifdefs, the code and associated static variables will
be optimised out by the compiler when CONFIG_DEBUG_PAGEALLOC is
not defined.
Signed-off-
KFENCE support was added for ppc32 in commit 90cbac0e995d
("powerpc: Enable KFENCE for PPC32").
Enable KFENCE on ppc64 architecture with hash and radix MMUs.
It uses the same mechanism as debug pagealloc to
protect/unprotect pages. All KFENCE kunit tests pass on both
MMUs.
KFENCE memory is initial
There is support for DEBUG_PAGEALLOC on hash but not on radix.
Add support on radix.
Signed-off-by: Nicholas Miehlbradt
---
arch/powerpc/mm/book3s64/radix_pgtable.c | 16 +++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c
b/ar
On Sun, 2022-09-18 at 18:03 +0800, Jilin Yuan wrote:
> Delete the redundant word 'dont'.
>
> Signed-off-by: Jilin Yuan ---
> drivers/misc/cxl/native.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c
> index 50b0c44bb
On Sun, Sep 18, 2022 at 01:20:13AM +0200, Uwe Kleine-König wrote:
> When moving the definition of ppc4xx_edac_driver further down, the
> forward declarations can just be dropped.
>
> Do this to reduce line needless repetition.
>
> Signed-off-by: Uwe Kleine-König
> ---
> drivers/edac/ppc4xx_edac
On Sun, Sep 18, 2022, at 5:50 PM, cgel@gmail.com wrote:
> @@ -970,7 +970,7 @@ static int pm121_init_pm(void)
> const struct smu_sdbp_header *hdr;
>
> hdr = smu_get_sdb_partition(SMU_SDB_SENSORTREE_ID, NULL);
> - if (hdr != 0) {
> + if (hdr != NULL) {
>
From: Xu Panda
Comparing pointer whith NULL instead of comparing pointer to 0.
Reported-by: Zeal Robot
Signed-off-by: Xu Panda
---
drivers/macintosh/windfarm_pm121.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/macintosh/windfarm_pm121.c
b/drivers/macintosh
Delete the redundant word 'dont'.
Signed-off-by: Jilin Yuan
---
drivers/misc/cxl/native.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c
index 50b0c44bb8d7..6957946a6463 100644
--- a/drivers/misc/cxl/native.c
+++ b/driver
Le 17/09/2022 à 20:38, Samuel Holland a écrit :
> On 9/17/22 03:16, Christophe Leroy wrote:
>> Le 16/09/2022 à 07:05, Samuel Holland a écrit :
>>> With CONFIG_PREEMPT=y (involuntary preemption enabled), it is possible
>>> to switch away from a task inside copy_{from,to}_user. This left the CPU
>>
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