Hey all, a couple of us over in #talos-workstation on freenode have been
working on an effort to bring up a Linux PowerPC userland that runs in 32-bit
little-endian mode, aka ppcle. As far as we can tell, no ABI has ever been
designated for this (unless you count the patchset from a decade ago [1])
Hi "Aneesh,
I love your patch! Yet something to improve:
[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.7-rc7]
[cannot apply to next-20200529]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest t
Hi "Aneesh,
I love your patch! Yet something to improve:
[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.7-rc7 next-20200529]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base&
From: Thomas Falcon
Date: Thu, 28 May 2020 11:19:17 -0500
> VNIC protocol version is reported in big-endian format, but it
> is not byteswapped before logging. Fix that, and remove version
> comparison as only one protocol version exists at this time.
>
> Signed-off-by: Thomas Falcon
Applied,
From: Peter Zijlstra
Date: Fri, 29 May 2020 23:35:51 +0200
> ../arch/sparc/include/asm/percpu_64.h:7:24: warning: call-clobbered register
> used for global register variable
> register unsigned long __local_per_cpu_offset asm("g5");
The "-ffixed-g5" option on the command line tells gcc that we
tree: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
next-test
head: e376ca093587eafd840bb0f9df04090e2a54249c
commit: dc3d8f85bb571c3640ebba24b82a527cf2cb3f24 [160/198] powerpc/powernv/pci:
Re-work bus PE configuration
config: powerpc64-randconfig-r024-20200529 (attached
'seq_buf' provides a very useful abstraction for writing to a string
buffer without needing to worry about it over-flowing. However even
though the API has been stable for couple of years now its still not
exported to kernel loadable modules limiting its usage.
Hence this patch proposes update to
This patch implements support for PDSM request 'PAPR_PDSM_HEALTH'
that returns a newly introduced 'struct nd_papr_pdsm_health' instance
containing dimm health information back to user space in response to
ND_CMD_CALL. This functionality is implemented in newly introduced
papr_pdsm_health() that que
Introduce support for PAPR NVDIMM Specific Methods (PDSM) in papr_scm
module and add the command family NVDIMM_FAMILY_PAPR to the white list
of NVDIMM command sets. Also advertise support for ND_CMD_CALL for the
nvdimm command mask and implement necessary scaffolding in the module
to handle ND_CMD_
Implement support for fetching nvdimm health information via
H_SCM_HEALTH hcall as documented in Ref[1]. The hcall returns a pair
of 64-bit bitmap, bitwise-and of which is then stored in
'struct papr_scm_priv' and subsequently partially exposed to
user-space via newly introduced dimm specific attri
Add documentation to 'papr_hcalls.rst' describing the bitmap flags
that are returned from H_SCM_HEALTH hcall as per the PAPR-SCM
specification.
Cc: "Aneesh Kumar K . V"
Cc: Dan Williams
Cc: Michael Ellerman
Cc: Ira Weiny
Signed-off-by: Vaibhav Jain
---
Changelog:
v8..v9:
* s/SCM/PMEM device.
Changes since v8 [1]:
* Updated proposed changes to remove usage of term 'SCM' due to
ambiguity with 'PMEM' and 'NVDIMM'. [ Dan Williams ]
* Replaced the usage of term 'SCM' with 'PMEM' in most contexts.
[ Aneesh ]
* Renamed NVDIMM health defines from PAPR_SCM_DIMM_* to PAPR_PMEM_* .
* Updates
Ahmed and Sebastian wanted additional lockdep_assert*() macros and ran
into header hell.
Move the IRQ state into per-cpu variables, which removes the dependency on
task_struct, which is what generated the header-hell.
These patches are intended to go on top of:
https://lkml.kernel.org/r/2020052
In order to use in lockdep.h, we need to make sure
asm/percpu.h does not itself depend on lockdep.
The below seems to make that so and builds powerpc64-defconfig +
PROVE_LOCKING.
Signed-off-by: Peter Zijlstra (Intel)
---
arch/powerpc/include/asm/dtl.h | 52 +++
In order to break a header dependency between lockdep and task_struct,
I need per-cpu stuff from lockdep.
Including from lockdep.h gives a build error, this
patch cures that, but results in the following warning:
../arch/sparc/include/asm/percpu_64.h:7:24: warning: call-clobbered register
used
Now that the macros use per-cpu data, we no longer need the argument.
Signed-off-by: Peter Zijlstra (Intel)
---
arch/x86/entry/common.c|2 +-
include/linux/irqflags.h |8
include/linux/lockdep.h|2 +-
kernel/locking/lockdep.c | 30 ++
Currently all IRQ-tracking state is in task_struct, this means that
task_struct needs to be defined before we use it.
Especially for lockdep_assert_irq*() this can lead to header-hell.
Move the hardirq state into per-cpu variables to avoid the task_struct
dependency.
Signed-off-by: Peter Zijlstr
In order to use in irqflags.h, we need to make sure
asm/percpu.h does not itself depend on irqflags.h
Signed-off-by: Peter Zijlstra (Intel)
---
arch/s390/include/asm/smp.h |1 +
arch/s390/include/asm/thread_info.h |1 -
2 files changed, 1 insertion(+), 1 deletion(-)
--- a/arch/
On Fri, May 29, 2020 at 07:03:48PM +, Will Springer wrote:
> The next problem concerns the ABI more directly. The failure mode was `file`
> surfacing EINVAL from pread64 when invoked on an ELF; pread64 was passed a
> garbage value for `pos`, which didn't appear to be caused by anything in
> `f
On Fri, May 29, 2020 at 3:55 AM Aneesh Kumar K.V
wrote:
>
> On 5/29/20 3:22 PM, Jan Kara wrote:
> > Hi!
> >
> > On Fri 29-05-20 15:07:31, Aneesh Kumar K.V wrote:
> >> Thanks Michal. I also missed Jeff in this email thread.
> >
> > And I think you'll also need some of the sched maintainers for the
Hi Michael,
Le 28/04/2020 à 15:16, Christophe Leroy a écrit :
This is the seventh version of a series to switch powerpc VDSO to
generic C implementation.
Main changes since v7 are:
- Added gettime64 on PPC32
This series applies on today's powerpc/merge branch.
See the last patches for details
Le 29/05/2020 à 20:50, Christophe Leroy a écrit :
From: Christophe Leroy
'thread' doesn't exist in kuap_check() macro.
Use 'current' instead.
Fixes: a68c31fc01ef ("powerpc/32s: Implement Kernel Userspace Access
Protection")
Signed-off-by: Christophe Leroy
Argh, can you drop this line ?
> Please just remove the message instead, it's a tiny allocation that's
> unlikely to ever fail, and the caller will print an error anyway.
How do you think about to take another look at a previous update suggestion
like the following?
powerpc/nvram: Delete three error messages for a failed memor
From: Christophe Leroy
'thread' doesn't exist in kuap_check() macro.
Use 'current' instead.
Fixes: a68c31fc01ef ("powerpc/32s: Implement Kernel Userspace Access
Protection")
Signed-off-by: Christophe Leroy
Cc: sta...@vger.kernel.org
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/a
On Mon, 25 May 2020 22:12:46 +0800, Xiyu Yang wrote:
> fsl_asrc_dma_hw_params() invokes dma_request_channel() or
> fsl_asrc_get_dma_channel(), which returns a reference of the specified
> dma_chan object to "pair->dma_chan[dir]" with increased refcnt.
>
> The reference counting issue happens in on
On Fri, May 29, 2020 at 11:49:12AM +, Luis Chamberlain wrote:
> Yikes, sense, you're right. Nope, I left the random config tests to
> 0day. Will fix, thanks!
Yeah, I do the same for randconfig, but I always do an "allmodconfig"
build before sending stuff. It's a good smoke test.
--
Kees Cook
Luis Chamberlain writes:
> The way to create a subdirectory from the base set of directories
> is a bit obscure, so provide a helper which makes this clear, and
> also helps remove boiler plate code required to do this work.
I agreee calling:
register_sysctl("fs/binfmt_misc", sysctl_mount_point)
Luis Chamberlain writes:
> This simplifies the code considerably. The following coccinelle
With register_sysctl the code would read:
cdrom_sysctl_header = register_sysctl("dev/cdrom", cdrom_table);
Please go that direction. Thank you.
Eric
ebied...@xmission.com (Eric W. Biederman) writes:
> Luis Chamberlain writes:
>
>> Often enough all we need to do is create a subdirectory so that
>> we can stuff sysctls underneath it. However, *if* that directory
>> was already created early on the boot sequence we really have no
>> need to use
Luis Chamberlain writes:
> Often enough all we need to do is create a subdirectory so that
> we can stuff sysctls underneath it. However, *if* that directory
> was already created early on the boot sequence we really have no
> need to use the full boiler plate code for it, we can just use
> local
On Sun, May 24, 2020 at 2:26 PM Alexandre Ghiti wrote:
>
> Relocating kernel at runtime is done very early in the boot process, so
> it is not convenient to check for relocations there and react in case a
> relocation was not expected.
>
> Powerpc architecture has a script that allows to check at
On Sun, May 24, 2020 at 2:25 PM Alexandre Ghiti wrote:
>
> This config allows to compile the kernel as PIE and to relocate it at
> any virtual address at runtime: this paves the way to KASLR and to 4-level
> page table folding at runtime. Runtime relocation is possible since
> relocation metadata
On 2020/5/29 18:26, Greg KH wrote:
On Fri, May 29, 2020 at 07:41:06AM +, Luis Chamberlain wrote:
From: Xiaoming Ni
Move random_table sysctl from kernel/sysctl.c to drivers/char/random.c
and use register_sysctl_subdir() to help remove the clutter out of
kernel/sysctl.c.
Signed-off-by: Xiao
On Fri, May 29, 2020 at 11:13:21AM +0300, Jani Nikula wrote:
> On Fri, 29 May 2020, Luis Chamberlain wrote:
> > Often enough all we need to do is create a subdirectory so that
> > we can stuff sysctls underneath it. However, *if* that directory
> > was already created early on the boot sequence we
On 2020/5/29 18:26, Greg KH wrote:
On Fri, May 29, 2020 at 07:41:04AM +, Luis Chamberlain wrote:
From: Xiaoming Ni
Move the firmware config sysctl table to fallback_table.c and use the
new register_sysctl_subdir() helper. This removes the clutter from
kernel/sysctl.c.
Signed-off-by: Xiaom
On Fri, May 29, 2020 at 12:26:13PM +0200, Greg KH wrote:
> On Fri, May 29, 2020 at 07:41:04AM +, Luis Chamberlain wrote:
> > From: Xiaoming Ni
> >
> > Move the firmware config sysctl table to fallback_table.c and use the
> > new register_sysctl_subdir() helper. This removes the clutter from
>
On Fri, May 29, 2020 at 01:23:19AM -0700, Kees Cook wrote:
> On Fri, May 29, 2020 at 07:41:01AM +, Luis Chamberlain wrote:
> > This simplifies the code considerably. The following coccinelle
> > SmPL grammar rule was used to transform this code.
> >
> > // pycocci sysctl-subdir.cocci fs/ocfs2/
Andrew Donnellan writes:
> On 29/5/20 4:14 pm, Daniel Axtens wrote:
>> syzkaller is picking up a bunch of crashes that look like this:
>>
>> Unrecoverable exception 380 at c037ed60 (msr=80001031)
>> Oops: Unrecoverable exception, sig: 6 [#1]
>> LE PAGE_SIZE=64K MMU=Hash SMP NR_CPU
On 5/29/20 3:22 PM, Jan Kara wrote:
Hi!
On Fri 29-05-20 15:07:31, Aneesh Kumar K.V wrote:
Thanks Michal. I also missed Jeff in this email thread.
And I think you'll also need some of the sched maintainers for the prctl
bits...
On 5/29/20 3:03 PM, Michal Suchánek wrote:
Adding Jan
On Fri,
On Fri, May 29, 2020 at 07:41:06AM +, Luis Chamberlain wrote:
> From: Xiaoming Ni
>
> Move random_table sysctl from kernel/sysctl.c to drivers/char/random.c
> and use register_sysctl_subdir() to help remove the clutter out of
> kernel/sysctl.c.
>
> Signed-off-by: Xiaoming Ni
> Signed-off-by
On Fri, May 29, 2020 at 07:41:04AM +, Luis Chamberlain wrote:
> From: Xiaoming Ni
>
> Move the firmware config sysctl table to fallback_table.c and use the
> new register_sysctl_subdir() helper. This removes the clutter from
> kernel/sysctl.c.
>
> Signed-off-by: Xiaoming Ni
> Signed-off-by:
Hi!
On Fri 29-05-20 15:07:31, Aneesh Kumar K.V wrote:
> Thanks Michal. I also missed Jeff in this email thread.
And I think you'll also need some of the sched maintainers for the prctl
bits...
> On 5/29/20 3:03 PM, Michal Suchánek wrote:
> > Adding Jan
> >
> > On Fri, May 29, 2020 at 11:11:39AM
On 27/05/20 08:24, Tianjia Zhang wrote:
>>>
>>>
>
> Hi Huacai,
>
> These two patches(6/7 and 7/7) should be merged into the tree of the
> mips architecture separately. At present, there seems to be no good way
> to merge the whole architecture patchs.
>
> For this series of patches, some archite
Hi,
Thanks Michal. I also missed Jeff in this email thread.
-aneesh
On 5/29/20 3:03 PM, Michal Suchánek wrote:
Adding Jan
On Fri, May 29, 2020 at 11:11:39AM +0530, Aneesh Kumar K.V wrote:
With POWER10, architecture is adding new pmem flush and sync instructions.
The kernel should prevent th
Adding Jan
On Fri, May 29, 2020 at 11:11:39AM +0530, Aneesh Kumar K.V wrote:
> With POWER10, architecture is adding new pmem flush and sync instructions.
> The kernel should prevent the usage of MAP_SYNC if applications are not using
> the new instructions on newer hardware.
>
> This patch adds a
On 29/5/20 4:14 pm, Daniel Axtens wrote:
syzkaller is picking up a bunch of crashes that look like this:
Unrecoverable exception 380 at c037ed60 (msr=80001031)
Oops: Unrecoverable exception, sig: 6 [#1]
LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries
Modules linked in:
CP
On Fri, May 29, 2020 at 07:41:01AM +, Luis Chamberlain wrote:
> This simplifies the code considerably. The following coccinelle
> SmPL grammar rule was used to transform this code.
>
> // pycocci sysctl-subdir.cocci fs/ocfs2/stackglue.c
>
> @c1@
> expression E1;
> identifier subdir, sysctls;
On Fri, May 29, 2020 at 07:41:07AM +, Luis Chamberlain wrote:
> The way to create a subdirectory from the base set of directories
> is a bit obscure, so provide a helper which makes this clear, and
> also helps remove boiler plate code required to do this work.
>
> Signed-off-by: Luis Chamberl
On Fri, May 29, 2020 at 07:41:08AM +, Luis Chamberlain wrote:
> This moves the binfmt_misc sysctl to its own file to help remove
> clutter from kernel/sysctl.c.
>
> Signed-off-by: Luis Chamberlain
> ---
> fs/binfmt_misc.c | 1 +
> kernel/sysctl.c | 7 ---
> 2 files changed, 1 insertion(
On Fri, 29 May 2020, Luis Chamberlain wrote:
> Often enough all we need to do is create a subdirectory so that
> we can stuff sysctls underneath it. However, *if* that directory
> was already created early on the boot sequence we really have no
> need to use the full boiler plate code for it, we c
This moves the binfmt_misc sysctl to its own file to help remove
clutter from kernel/sysctl.c.
Signed-off-by: Luis Chamberlain
---
fs/binfmt_misc.c | 1 +
kernel/sysctl.c | 7 ---
2 files changed, 1 insertion(+), 7 deletions(-)
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index f69a043
The way to create a subdirectory from the base set of directories
is a bit obscure, so provide a helper which makes this clear, and
also helps remove boiler plate code required to do this work.
Signed-off-by: Luis Chamberlain
---
include/linux/sysctl.h | 7 +++
kernel/sysctl.c| 16 +
From: Xiaoming Ni
Move the firmware config sysctl table to fallback_table.c and use the
new register_sysctl_subdir() helper. This removes the clutter from
kernel/sysctl.c.
Signed-off-by: Xiaoming Ni
Signed-off-by: Luis Chamberlain
---
drivers/base/firmware_loader/fallback.c | 4
d
From: Xiaoming Ni
Move random_table sysctl from kernel/sysctl.c to drivers/char/random.c
and use register_sysctl_subdir() to help remove the clutter out of
kernel/sysctl.c.
Signed-off-by: Xiaoming Ni
Signed-off-by: Luis Chamberlain
---
drivers/char/random.c | 14 --
include/linux
From: Xiaoming Ni
Move epoll_table sysctl to fs/eventpoll.c and remove the
clutter out of kernel/sysctl.c by using register_sysctl_subdir()..
Signed-off-by: Xiaoming Ni
Signed-off-by: Luis Chamberlain
---
fs/eventpoll.c | 10 +-
include/linux/poll.h | 2 --
include/linux/sy
This simplifies the code considerably. The following coccinelle
SmPL grammar rule was used to transform this code.
// pycocci sysctl-subdir.cocci lib/test_sysctl.c
@c1@
expression E1;
identifier subdir, sysctls;
@@
static struct ctl_table subdir[] = {
{
.procname = E1,
From: Xiaoming Ni
move inotify_user sysctl to inotify_user.c and use the new
register_sysctl_subdir() helper.
Signed-off-by: Xiaoming Ni
Signed-off-by: Luis Chamberlain
---
fs/notify/inotify/inotify_user.c | 11 ++-
include/linux/inotify.h | 3 ---
kernel/sysctl.c
This simplifies the code considerably. The following coccinelle
SmPL grammar rule was used to transform this code.
// pycocci sysctl-subdir.cocci fs/ocfs2/stackglue.c
@c1@
expression E1;
identifier subdir, sysctls;
@@
static struct ctl_table subdir[] = {
{
.procname = E1,
Often enough all we need to do is create a subdirectory so that
we can stuff sysctls underneath it. However, *if* that directory
was already created early on the boot sequence we really have no
need to use the full boiler plate code for it, we can just use
local variables to help us guide sysctl to
This simplifies the code considerably. The following coccinelle
SmPL grammar rule was used to transform this code.
// pycocci sysctl-subdir.cocci drivers/macintosh/mac_hid.c
@c1@
expression E1;
identifier subdir, sysctls;
@@
static struct ctl_table subdir[] = {
{
.procnam
This simplifies the code considerably. The following coccinelle
SmPL grammar rule was used to transform this code.
// pycocci sysctl-subdir.cocci drivers/gpu/drm/i915/i915_perf.c
@c1@
expression E1;
identifier subdir, sysctls;
@@
static struct ctl_table subdir[] = {
{
.pr
This simplifies the code considerably. The following coccinelle
SmPL grammar rule was used to transform this code.
// pycocci sysctl-subdir.cocci drivers/cdrom/cdrom.c
@c1@
expression E1;
identifier subdir, sysctls;
@@
static struct ctl_table subdir[] = {
{
.procname = E1
This simplifies the code considerably. The following coccinelle
SmPL grammar rule was used to transform this code.
// pycocci sysctl-subdir.cocci drivers/char/hpet.c
@c1@
expression E1;
identifier subdir, sysctls;
@@
static struct ctl_table subdir[] = {
{
.procname = E1,
Me and Xiaoming are working on some kernel/sysctl.c spring cleaning.
During a recent linux-next merge conflict it became clear that
the kitchen sink on kernel/sysctl.c creates too many conflicts,
and so we need to do away with stuffing everyone's knobs on this
one file.
This is part of that work.
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