book3s/32 was the only user of KUAP_CURRENT_XXX.
After rework of book3s/32 KUAP, it is not used anymore.
Remove it.
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/book3s/32/kup.h | 1 -
arch/powerpc/include/asm/kup.h | 14 +++---
2 files changed, 3
prevent_user_access() doesn't use anymore to/from/size parameters.
Remove them.
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/book3s/32/kup.h | 3 +--
arch/powerpc/include/asm/book3s/64/kup.h | 3 +--
arch/powerpc/include/asm/kup.h | 15 +++
KUEP implements the update of user segment registers.
Move it into mmu-hash.h in order to use it from other places.
And inline kuep_lock() and kuep_unlock() and remove kuep.c
inlining kuep_lock() is important for system_call_exception(),
otherwise system_call_exception() has to save into stack
On book3s/32, KUAP is provided by toggling Ks bit in segment registers.
One segment registers addresses 256M of virtual memory.
At the time being, KUAP implements a complex logic to apply the
unlock/lock on the exact number of segments covering the user range
to access, with saving the boundaries
All KUAP helpers defined in asm/kup.h are single line functions
that should be inlined. But on book3s/32 build, we get many
instances of .
Force inlining of those helpers.
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/kup.h | 22 +++---
1 file changed, 11
On Wed, May 12, 2021 at 01:48:53PM +1000, Alexey Kardashevskiy wrote:
> >Oh! I completely missed those few lines. Sorry for that :-(
>
> Well, I probably should have made it a separate patch anyway, I'll
> repost separately.
Thanks.
> >To compensate a bit:
> >
> >>It still puzzles me why we
arch/$(SRCARCH)/Kbuild is useful for Makefile cleanups because you can
use the obj-y syntax.
Add an empty file if it is missing in arch/$(SRCARCH)/.
Signed-off-by: Masahiro Yamada
---
Makefile | 2 +-
arch/alpha/Kbuild | 1 +
arch/arc/Makefile | 3 ---
On Sat, May 8, 2021 at 12:17 AM Casey Schaufler wrote:
> On 5/7/2021 4:40 AM, Ondrej Mosnacek wrote:
> > Commit 59438b46471a ("security,lockdown,selinux: implement SELinux
> > lockdown") added an implementation of the locked_down LSM hook to
> > SELinux, with the aim to restrict which domains are
On Wed, 2021-05-12 at 01:48 +, Chris Packham wrote:
> On 12/05/21 10:10 am, Joakim Tjernlund wrote:
> > On Wed, 2021-05-12 at 09:20 +1200, Chris Packham wrote:
> > > The P2040/P2041 has an erratum where the i2c recovery scheme
> > > documented in the reference manual (and currently implemented
Hi,
Le 11/05/2021 à 12:51, Segher Boessenkool a écrit :
Hi!
On Tue, May 11, 2021 at 06:08:06AM +, Christophe Leroy wrote:
Commit 328e7e487a46 ("powerpc: force inlining of csum_partial() to
avoid multiple csum_partial() with GCC10") inlined csum_partial().
Now that csum_partial() is
On Wed, May 12, 2021 at 10:08:21PM +0530, Kajol Jain wrote:
> +static void nvdimm_pmu_read(struct perf_event *event)
> +{
> + struct nvdimm_pmu *nd_pmu = to_nvdimm_pmu(event->pmu);
> +
> + /* jump to arch/platform specific callbacks if any */
> + if (nd_pmu && nd_pmu->read)
> +
On Wed, May 12, 2021 at 04:43:33PM +0200, Christophe Leroy wrote:
> Le 12/05/2021 à 16:31, Segher Boessenkool a écrit :
> >On Wed, May 12, 2021 at 02:56:56PM +0200, Christophe Leroy wrote:
> >>Le 11/05/2021 à 12:51, Segher Boessenkool a écrit :
> >>>Something seems to have decided this asm is more
On 5/12/2021 9:44 AM, Ondrej Mosnacek wrote:
> On Wed, May 12, 2021 at 6:18 PM Casey Schaufler
> wrote:
>> On 5/12/2021 6:21 AM, Ondrej Mosnacek wrote:
>>> On Sat, May 8, 2021 at 12:17 AM Casey Schaufler
>>> wrote:
On 5/7/2021 4:40 AM, Ondrej Mosnacek wrote:
> Commit 59438b46471a
Hi Christophe,
I love your patch! Perhaps something to improve:
[auto build test WARNING on powerpc/next]
[also build test WARNING on linus/master v5.13-rc1 next-20210512]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base
Le 12/05/2021 à 16:31, Segher Boessenkool a écrit :
On Wed, May 12, 2021 at 02:56:56PM +0200, Christophe Leroy wrote:
Le 11/05/2021 à 12:51, Segher Boessenkool a écrit :
Something seems to have decided this asm is more expensive than it is.
That isn't always avoidable -- the compiler cannot
As stated somewhere here already, we'll have to look into making
alloc_contig_range() (and main users CMA and virtio-mem) independent of
MAX_ORDER and mainly rely on pageblock_order. The current handling in
alloc_contig_range() is far from optimal as we have to isolate a whole
MAX_ORDER - 1
Patchset adds performance stats reporting support for nvdimm.
Added interface includes support for a pmu register function and
callbacks to be used by arch/platform specific drivers.
User could use standard perf tool to access perf events exposed via pmu.
Patchset adds a structure called
This patch adds support for performance monitoring of papr
nvdimm devices via perf interface. It adds callbacks functions
like add/del/read/event_init for nvdimm_pmu structure.
Patch adds a new parameter 'priv' in pdev_archdata structure to save
nvdimm_pmu device pointer, to handle the
Patch here adds cpu hotplug functions to nvdimm pmu.
It adds cpumask to designate a cpu to make HCALL to
collect the counter data for the nvdimm device and
update ABI documentation accordingly.
Result in power9 lpar system:
command:# cat /sys/devices/nmem0/cpumask
0
Signed-off-by: Kajol Jain
Patch adds performance stats reporting support for nvdimm.
Added interface includes support for a pmu register function and
callbacks to be used by the arch/platform specific drivers.
User could use the standard perf tool to access perf events exposed
via pmu.
A structure is added called
On 5/12/2021 6:21 AM, Ondrej Mosnacek wrote:
> On Sat, May 8, 2021 at 12:17 AM Casey Schaufler
> wrote:
>> On 5/7/2021 4:40 AM, Ondrej Mosnacek wrote:
>>> Commit 59438b46471a ("security,lockdown,selinux: implement SELinux
>>> lockdown") added an implementation of the locked_down LSM hook to
>>>
Some architectures like powerpc require a non standard
allocation of optinsn page, because module pages are
too far from the kernel for direct branches.
Define weak alloc_optinsn_page() and free_optinsn_page(), that
fall back on alloc_insn_page() and free_insn_page() when not
overriden by the
Commit 51c9c0843993 ("powerpc/kprobes: Implement Optprobes")
implemented a powerpc specific version of optinsn in order
to workaround the 32Mb limitation for direct branches.
Instead of implementing a dedicated powerpc version, use the
common optinsn and override the allocation and freeing
On Wed, May 12, 2021 at 02:56:56PM +0200, Christophe Leroy wrote:
> Le 11/05/2021 à 12:51, Segher Boessenkool a écrit :
> >Something seems to have decided this asm is more expensive than it is.
> >That isn't always avoidable -- the compiler cannot look inside asms --
> >but it seems it could be
On Wed, May 12, 2021 at 6:18 PM Casey Schaufler wrote:
> On 5/12/2021 6:21 AM, Ondrej Mosnacek wrote:
> > On Sat, May 8, 2021 at 12:17 AM Casey Schaufler
> > wrote:
> >> On 5/7/2021 4:40 AM, Ondrej Mosnacek wrote:
> >>> Commit 59438b46471a ("security,lockdown,selinux: implement SELinux
> >>>
> > I've been doing my recent work with a P2040 and prior to that I did test
> > out the recovery on a T2081 (which isn't documented to have this
> > erratum) when I was re-working the driver. The "new" recovery actually
> > seems better but I don't have a reliably faulty i2c device so that's
This patch add event format and events details in ABI
documentation
Signed-off-by: Kajol Jain
---
Documentation/ABI/testing/sysfs-bus-papr-pmem | 25 +++
1 file changed, 25 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-papr-pmem
As pointed out by commit
de9b8f5dcbd9 ("sched: Fix crash trying to dequeue/enqueue the idle thread")
init_idle() can and will be invoked more than once on the same idle
task. At boot time, it is invoked for the boot CPU thread by
sched_init(). Then smp_init() creates the threads for all the
On Wed, 12 May 2021 14:29:27 + (UTC)
Christophe Leroy wrote:
> Commit 51c9c0843993 ("powerpc/kprobes: Implement Optprobes")
> implemented a powerpc specific version of optinsn in order
> to workaround the 32Mb limitation for direct branches.
>
> Instead of implementing a dedicated powerpc
On Wed, 12 May 2021 14:29:26 + (UTC)
Christophe Leroy wrote:
> Some architectures like powerpc require a non standard
> allocation of optinsn page, because module pages are
> too far from the kernel for direct branches.
>
> Define weak alloc_optinsn_page() and free_optinsn_page(), that
>
On Thu, 13 May 2021 03:04:51 +0800
kernel test robot wrote:
> Hi Christophe,
>
> I love your patch! Perhaps something to improve:
>
> [auto build test WARNING on powerpc/next]
> [also build test WARNING on linus/master v5.13-rc1 next-20210512]
> [If your patch is applied
On Mon, May 10, 2021 at 11:18 AM Jordan Niethe wrote:
>
> From: Russell Currey
>
> The set_memory_{ro/rw/nx/x}() functions are required for
> STRICT_MODULE_RWX, and are generally useful primitives to have. This
> implementation is designed to be generic across powerpc's many MMUs.
> It's
tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
merge
branch HEAD: 1fab3666d738e4af3a7450c1310e4d7a7e53 Automatic merge of
'master' into merge (2021-05-09 08:09)
elapsed time: 6060m
configs tested: 97
configs skipped: 2
The following configs have been built
Hi Christophe,
I love your patch! Yet something to improve:
[auto build test ERROR on powerpc/next]
[also build test ERROR on linus/master v5.13-rc1 next-20210512]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base
On 5/3/21 10:02 PM, David Gibson wrote:
On Fri, Apr 30, 2021 at 09:09:16AM -0300, Daniel Henrique Barboza wrote:
dlpar_memory_remove_by_ic() validates the amount of LMBs to be removed
by checking !DRCONF_MEM_RESERVED, and in the following loop before
dlpar_remove_lmb() a check for
On Fri, May 7, 2021 at 4:40 AM Vaibhav Jain wrote:
>
> In case performance stats for an nvdimm are not available, reading the
> 'perf_stats' sysfs file returns an -ENOENT error. A better approach is
> to make the 'perf_stats' file entirely invisible to indicate that
> performance stats for an
We don't need the 'lmbs_available' variable to count the valid LMBs and
to check if we have less than 'lmbs_to_remove'. We must ensure that the
entire LMB range must be removed, so we can error out immediately if any
LMB in the range is marked as reserved.
Add a couple of comments explaining the
Hi Christophe,
I love your patch! Perhaps something to improve:
[auto build test WARNING on powerpc/next]
[also build test WARNING on linus/master v5.13-rc1 next-20210512]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base
As previously done in dlpar_cpu_remove() for CPUs, this patch changes
dlpar_memory_remove_by_ic() to unisolate the LMB DRC when the LMB is
failed to be removed. The hypervisor, seeing a LMB DRC that was supposed
to be removed being unisolated instead, can do error recovery on its
side.
This
After marking the LMBs as reserved depending on dlpar_remove_lmb() rc,
we evaluate whether we need to add the LMBs back or if we can release
the LMB DRCs. In both cases, a for_each_drmem_lmb() loop without a break
condition is used. This means that we're going to cycle through all LMBs
of the
changes from v1:
- patch 1: added David's r-b
- patch 2:
* removed the DRCONF_MEM_RESERVED assumption for
dlpar_memory_remove_by_ic()
* reworded the commit msg
- patch 3: dropped. the differences between dlpar_memory_remove_by_ic()
and dlpar_memory_remove_by_count() makes a helper
DRCONF_MEM_RESERVED is a flag that represents the "Reserved Memory"
status in LOPAR v2.10, section 4.2.8. If a LMB is marked as reserved,
quoting LOPAR, "is not to be used or altered by the base OS". This flag
is read only in the kernel, being set by the firmware/hypervisor in the
DT. As an
On Wed, May 12, 2021 at 05:35:39PM -0300, Daniel Henrique Barboza wrote:
>
> On 5/3/21 10:02 PM, David Gibson wrote:
> > On Fri, Apr 30, 2021 at 09:09:16AM -0300, Daniel Henrique Barboza wrote:
> > > dlpar_memory_remove_by_ic() validates the amount of LMBs to be removed
> > > by checking
On Wed, May 12, 2021 at 05:28:08PM -0300, Daniel Henrique Barboza wrote:
> After marking the LMBs as reserved depending on dlpar_remove_lmb() rc,
> we evaluate whether we need to add the LMBs back or if we can release
> the LMB DRCs. In both cases, a for_each_drmem_lmb() loop without a break
>
On Wed, May 12, 2021 at 05:28:09PM -0300, Daniel Henrique Barboza wrote:
> We don't need the 'lmbs_available' variable to count the valid LMBs and
> to check if we have less than 'lmbs_to_remove'. We must ensure that the
> entire LMB range must be removed, so we can error out immediately if any
>
On Wed, May 12, 2021 at 05:28:07PM -0300, Daniel Henrique Barboza wrote:
> DRCONF_MEM_RESERVED is a flag that represents the "Reserved Memory"
> status in LOPAR v2.10, section 4.2.8. If a LMB is marked as reserved,
> quoting LOPAR, "is not to be used or altered by the base OS". This flag
> is read
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