On Thu, Feb 10, 2022 at 04:54:52PM -0800, Kees Cook wrote:
> On Sun, Oct 17, 2021 at 02:38:17PM +0200, Christophe Leroy wrote:
(edited:)
> > +typedef struct {
> > + unsigned long addr;
> > +} func_desc_t;
> >
> > static func_desc_t func_desc(unsigned long addr)
> > {
> > + return
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/trace/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/trace/Makefile
b/arch/powerpc/kernel/trace/Makefile
index ac7d42a4e8d0..542aa7a8b2b4 100644
--- a/arch/powerpc/kernel/trace/Makefile
commit: d9c234005227 ("Do not depend on MAX_ORDER when grouping pages by
mobility")
introduced pageblock_order which will be used to group pages better.
The kernel now groups pages based on the value of HPAGE_SHIFT. Hence HPAGE_SHIFT
should be set before we call set_pageblock_order.
On Fri, 2022-02-11 at 13:31 +1100, Alexey Kardashevskiy wrote:
> diff --git a/arch/powerpc/lib/memcpy_64.S
> b/arch/powerpc/lib/memcpy_64.S
> index 016c91e958d8..286c7e2d0883 100644
> --- a/arch/powerpc/lib/memcpy_64.S
> +++ b/arch/powerpc/lib/memcpy_64.S
> @@ -50,10 +50,11 @@
Avoid code duplication by adding util.h
Cc: Shuah Khan
Cc: linux-kselft...@vger.kernel.org
Signed-off-by: Aneesh Kumar K.V
---
tools/testing/selftests/vm/ksm_tests.c| 45 +---
tools/testing/selftests/vm/transhuge-stress.c | 49 ++---
Keep it simple by using a #define and limiting hugepage size to 2M.
This keeps the test simpler instead of dynamically finding the page size
and huge page size.
Without this tests are broken w.r.t reading /proc/self/pagemap
if (pread(pagemap_fd, ent, sizeof(ent),
This fixes the below crash:
kernel BUG at include/linux/mm.h:2373!
cpu 0x5d: Vector: 700 (Program Check) at [c0003c6e76e0]
pc: c0581a54: pmd_to_page+0x54/0x80
lr: c058d184: move_hugetlb_page_tables+0x4e4/0x5b0
sp: c0003c6e7980
msr: 90029033
current
Hi Rikard,
> The only usage of these is to pass their address to
> sysfs_{create,remove}_group(), which takes pointers to const struct
> attribute_group. Make them const to allow the compiler to put them in
> read-only memory.
I checked the file. Indeed, those structs are only used in
Yury Norov writes:
> PowerPC code uses cpumask_weight() to compare the weight of cpumask with
> a given number. We can do it more efficiently with cpumask_weight_{eq, ...}
> because conditional cpumask_weight may stop traversing the cpumask earlier,
> as soon as condition is (or can't be) met.
>
reference to
`_mcount'
Error/Warning ids grouped by kconfigs:
gcc_recent_errors
`-- powerpc64-randconfig-r012-20220210
|-- (.text):undefined-reference-to-_mcount
|-- compat_audit.c:(.text):undefined-reference-to-_mcount
|-- core.c:(.text):undefined-reference-to-_mcount
|-- fault.c
LTO invites ld/lld to optimize the output binary and this may affect
the FTP alternative section if alt branches use "bc" (Branch Conditional)
which only allows 16 bit offsets. This manifests in errors like:
ld.lld: error: InputSection too large for range extension thunk
The config is a copy of ppc64_defconfig with a few tweaks. This could be
a smaller config to merge into ppc64_defconfig but unfortunately
merger does not allow disabling already enabled options.
This is a command line to compile the kernel using the upstream llvm:
make -j64
The upstream LLVM supports now LTO on PPC, enable it.
Signed-off-by: Alexey Kardashevskiy
---
arch/powerpc/Kconfig | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index b779603978e1..91c14f83 100644
--- a/arch/powerpc/Kconfig
+++
This is based on sha1
1b43a74f255c Michael Ellerman "Automatic merge of 'master' into merge
(2022-02-01 10:41)".
Please comment. Thanks.
Alexey Kardashevskiy (3):
powerpc/64: Allow LLVM LTO builds
powerpc/llvm: Sample config for LLVM LTO
powerpc/llvm/lto: Workaround conditional
allmodconfig
powerpc randconfig-c003-20220210
i386 randconfig-c001
xtensa virt_defconfig
powerpc64 defconfig
powerpc sequoia_defconfig
arm iop32x_defconfig
Paul Menzel writes:
> Am 08.02.22 um 11:09 schrieb Michael Ellerman:
>> Paul Menzel writes:
>
> […]
>
>>> On the POWER8 server IBM S822LC running Ubuntu 21.10, building Linux
>>> 5.17-rc2+ with rcutorture tests
>>
>> I'm not sure if that's the host kernel version or the version you're
>> using
On Sun, Oct 17, 2021 at 02:38:25PM +0200, Christophe Leroy wrote:
> Add WRITE_OPD to check that you can't modify function
> descriptors.
>
> Gives the following result when function descriptors are
> not protected:
>
> lkdtm: Performing direct entry WRITE_OPD
> lkdtm: attempting bad
On Sun, Oct 17, 2021 at 02:38:24PM +0200, Christophe Leroy wrote:
> execute_location() and execute_user_location() intent
> to copy do_nothing() text and execute it at a new location.
> However, at the time being it doesn't copy do_nothing() function
> but do_nothing() function descriptor which
On Thu, Feb 10, 2022 at 09:30:43PM +1100, Michael Ellerman wrote:
> Christophe Leroy writes:
> > diff --git a/kernel/extable.c b/kernel/extable.c
> > index b0ea5eb0c3b4..1ef13789bea9 100644
> > --- a/kernel/extable.c
> > +++ b/kernel/extable.c
> > @@ -159,12 +160,32 @@ int
On Sun, Oct 17, 2021 at 02:38:17PM +0200, Christophe Leroy wrote:
> In preparation of making func_desc_t generic, change the ELFv2
> version to a struct containing 'addr' element.
>
> This allows using single helpers common to ELFv1 and ELFv2.
>
> Signed-off-by: Christophe Leroy
> ---
>
On Sun, Oct 17, 2021 at 02:38:14PM +0200, Christophe Leroy wrote:
> There are three architectures with function descriptors, try to
> have common names for the address they contain in order to
> refactor some functions into generic functions later.
>
> powerpc has 'entry'
> ia64 has 'ip'
> parisc
Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian
2.37.90.20220207) the following build error shows up:
{standard input}: Assembler messages:
{standard input}:2088: Error: unrecognized opcode: `ptesync'
make[3]: *** [/builds/linux/scripts/Makefile.build:287:
qman_test_stash() calls cpumask_weight() to compare the weight of cpumask
with a given number. We can do it more efficiently with cpumask_weight_lt
because conditional cpumask_weight may stop traversing the cpumask earlier,
as soon as condition is (or can't be) met.
Signed-off-by: Yury Norov
---
PowerPC code uses cpumask_weight() to compare the weight of cpumask with
a given number. We can do it more efficiently with cpumask_weight_{eq, ...}
because conditional cpumask_weight may stop traversing the cpumask earlier,
as soon as condition is (or can't be) met.
Signed-off-by: Yury Norov
On Wed, Feb 09, 2022 at 03:46:05PM +1100, Michael Ellerman wrote:
> Luis Chamberlain writes:
> > On Tue, Jan 11, 2022 at 12:37:42PM +0100, Michal Suchanek wrote:
> >> Hello,
> >>
> >> This is a refresh of the KEXEC_SIG series.
> >>
> >> This adds KEXEC_SIG support on powerpc and deduplicates
The only usage of these is to pass their address to
sysfs_{create,remove}_group(), which takes pointers to const struct
attribute_group. Make them const to allow the compiler to put them in
read-only memory.
Signed-off-by: Rikard Falkeborn
---
drivers/crypto/nx/nx-common-pseries.c | 4 ++--
1
The only usage of omap_sham_attr_group is to pass its address to
sysfs_{create,remove}_group(), which takes pointers to const struct
attribute_group. Make it const to allow the compiler to put it in
read-only memory.
Signed-off-by: Rikard Falkeborn
---
drivers/crypto/omap-sham.c | 2 +-
1 file
The only usage of omap_aes_attr_group is to pass its address to
sysfs_{create,remove}_group(), which takes pointers to const struct
attribute_group. Make it const to allow the compiler to put it in
read-only memory.
Signed-off-by: Rikard Falkeborn
---
drivers/crypto/omap-aes.c | 2 +-
1 file
This series constifies a couple of static attribute_group structs that
are not modified. This allows the compiler to put them in read-only
memory. The patches are independent and can be applied in any order (and
go through different trees if needed).
Rikard Falkeborn (3):
crypto: omap-aes -
Le 10/02/2022 à 13:44, Anders Roxell a écrit :
> Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian
> 2.37.90.20220207) the following build error shows up:
>
> {standard input}: Assembler messages:
> {standard input}:2088: Error: unrecognized opcode: `ptesync'
> make[3]: ***
On Thu, 10 Feb 2022 16:40:28 +
"Naveen N. Rao" wrote:
> The other option is to mark ftrace_cmp_recs() as a __weak function, but
> I have a vague recollection of you suggesting #ifdef rather than a
> __weak function in the past. I might be mis-remembering, so if you think
> making this a
Steven Rostedt wrote:
On Thu, 10 Feb 2022 13:58:29 +
"Naveen N. Rao" wrote:
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index f9feb197b2daaf..68f20cf34b0c47 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1510,6 +1510,7 @@ ftrace_ops_test(struct
On Wed, Feb 9, 2022 at 5:32 PM Michael Walle wrote:
>
> This series converts the guts driver from a platform driver to just an
> core_initcall. The driver itself cannot (or rather should never) be
> unloaded because others depends on detecting the current SoC revision
> to apply chip errata.
On 2/10/22 8:03 AM, Aneesh Kumar K V wrote:
On 2/10/22 20:09, Shuah Khan wrote:
On 2/9/22 9:12 PM, Aneesh Kumar K.V wrote:
Shuah Khan writes:
On 2/9/22 8:43 AM, Aneesh Kumar K.V wrote:
Keep it simple by using a #define and limiting hugepage size to 2M.
This keeps the test simpler instead
On 2/10/22 20:09, Shuah Khan wrote:
On 2/9/22 9:12 PM, Aneesh Kumar K.V wrote:
Shuah Khan writes:
On 2/9/22 8:43 AM, Aneesh Kumar K.V wrote:
Keep it simple by using a #define and limiting hugepage size to 2M.
This keeps the test simpler instead of dynamically finding the page
size
and
On Thu, 10 Feb 2022 13:58:29 +
"Naveen N. Rao" wrote:
> diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> index f9feb197b2daaf..68f20cf34b0c47 100644
> --- a/kernel/trace/ftrace.c
> +++ b/kernel/trace/ftrace.c
> @@ -1510,6 +1510,7 @@ ftrace_ops_test(struct ftrace_ops *ops,
On 2/9/22 9:12 PM, Aneesh Kumar K.V wrote:
Shuah Khan writes:
On 2/9/22 8:43 AM, Aneesh Kumar K.V wrote:
Keep it simple by using a #define and limiting hugepage size to 2M.
This keeps the test simpler instead of dynamically finding the page size
and huge page size.
Without this tests are
Steven Rostedt wrote:
On Wed, 09 Feb 2022 17:50:09 +
"Naveen N. Rao" wrote:
However, I think we will not be able to use a fixed range. I would like
to reserve instructions from function entry till the branch to
_mcount(), and it can be two or four instructions depending on whether a
On 22/02/10 06:57PM, Sachin Sant wrote:
> While booting 5.17.0-rc3-next-20220210 on Power following warning
> is seen:
>
> [ 32.626501] EXT4-fs (sda2): re-mounted. Quota mode: none.
> [ 32.627225] [ cut here ]
> [ 32.627236] WARNING: CPU: 27 PID:
While booting 5.17.0-rc3-next-20220210 on Power following warning
is seen:
[ 32.626501] EXT4-fs (sda2): re-mounted. Quota mode: none.
[ 32.627225] [ cut here ]
[ 32.627236] WARNING: CPU: 27 PID: 1084 at mm/slub.c:3246
kmem_cache_alloc+0x3b0/0x680
[ 32.627250
Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian
2.37.90.20220207) the following build error shows up:
{standard input}: Assembler messages:
{standard input}:2088: Error: unrecognized opcode: `ptesync'
make[3]: *** [/builds/linux/scripts/Makefile.build:287:
From: Yang Guang
coccinelle report:
./drivers/scsi/ibmvscsi/ibmvfc.c:3453:8-16:
WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi/ibmvfc.c:3416:8-16:
WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi/ibmvfc.c:3436:8-16:
WARNING: use scnprintf or sprintf
Christophe Leroy writes:
> diff --git a/kernel/extable.c b/kernel/extable.c
> index b0ea5eb0c3b4..1ef13789bea9 100644
> --- a/kernel/extable.c
> +++ b/kernel/extable.c
> @@ -159,12 +160,32 @@ int kernel_text_address(unsigned long addr)
> }
>
> /*
> - * On some architectures (PPC64, IA64)
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