On Wed, Apr 28, 2021 at 11:28:48AM +0530, Gautham R Shenoy wrote:
> Hello Michal,
>
> On Sun, Apr 25, 2021 at 01:07:14PM +0200, Michal Suchánek wrote:
> > On Sat, Apr 24, 2021 at 01:07:16PM +0530, Vaidyanathan Srinivasan wrote:
> > > * Michal Such?nek [2021-04-23 20:42:16]:
> > >
> > > > On Fri,
After a LPM, the device tree node ibm,dynamic-reconfiguration-memory may be
updated by the hypervisor in the case the NUMA topology of the LPAR's
memory is updated.
This is caught by the kernel, but the memory's node is updated because
there is no way to move a memory block between nodes.
If late
On 26/04/2021 17:37, Claire Chang wrote:
On Fri, Apr 23, 2021 at 7:34 PM Steven Price wrote:
[...]
But even then if it's not and we have the situation where debugfs==NULL
then the debugfs_create_dir() here will cause a subsequent attempt in
swiotlb_create_debugfs() to fail (directory already
Le 28/04/2021 à 10:32, Christophe Leroy a écrit :
Le 17/03/2021 à 07:23, Nicholas Piggin a écrit :
This changes the awkward approach where architectures provide init
functions to determine which levels they can provide large mappings for,
to one where the arch is queried for each call.
Thi
Le 17/03/2021 à 07:23, Nicholas Piggin a écrit :
This changes the awkward approach where architectures provide init
functions to determine which levels they can provide large mappings for,
to one where the arch is queried for each call.
This removes code and indirection, and allows constant-f
Hello Michal,
On Wed, Apr 28, 2021 at 10:03:26AM +0200, Michal Suchánek wrote:
> >
> That's a nice detailed explanation. Maybe you could summarize it in the
> commit message so that people looking at the patch in the future can
> tell where the value comes from.
Sure, I will do that and send a
Am 2021-04-27 01:44, schrieb Benjamin Herrenschmidt:
On Mon, 2021-04-26 at 12:54 +0200, Michael Walle wrote:
(2) What do you think of eth_get_mac_address(ndev). That is, the
Not sure what you mean, eth_platform_get_mac_address() takes the
address as an argument. I think what you want is a cons
Make it easier to generate a 32 or 64-bit specific randconfig.
Requested-by: Randy Dunlap
Reviewed-by: Randy Dunlap
Tested-by: Randy Dunlap
Signed-off-by: Michael Ellerman
---
arch/powerpc/Makefile | 10 ++
arch/powerpc/configs/32-bit.config | 1 +
arch/powerpc/configs/6
On Wed, 2021-04-28 at 08:08 +0200, Christophe Leroy wrote:
>
> Le 28/04/2021 à 00:42, Eddie James a écrit :
> > On Tue, 2021-04-27 at 19:26 +0200, Christophe Leroy wrote:
> > > Hi Eddies,
> > >
> > > Le 27/04/2021 à 19:03, Eddie James a écrit :
> > > > Hi all,
> > > >
> > > > I'm having a proble
On Wed, 2021-04-28 at 08:08 +0200, Christophe Leroy wrote:
>
> Le 28/04/2021 à 00:42, Eddie James a écrit :
> > On Tue, 2021-04-27 at 19:26 +0200, Christophe Leroy wrote:
> > > Hi Eddies,
> > >
> > > Le 27/04/2021 à 19:03, Eddie James a écrit :
> > > > Hi all,
> > > >
> > > > I'm having a proble
iomap_max_page_shift is expected to contain a page shift,
so it can't be a 'bool', has to be an 'unsigned int'
And fix the default values: P4D_SHIFT is when huge iomap is allowed.
Signed-off-by: Christophe Leroy
---
mm/ioremap.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff
At the time being, arch_make_huge_pte() has the following prototype:
pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
struct page *page, int writable);
vma is used to get the pages shift or size.
vma is also used on Sparc to get vm_flags.
This series is a first tentative to implement huge VMAP and VMALLOC
on powerpc 8xx. This series applies on Linux next.
For the time being the 8xx specificities are plugged directly into
generic mm functions. I have no real idea on how to make it a nice
beautiful generic implementation for the time
For architectures with no PMD and/or no PUD, add stubs
similar to what we have for architectures without P4D.
Signed-off-by: Christophe Leroy
---
include/linux/pgtable.h | 26 +-
1 file changed, 25 insertions(+), 1 deletion(-)
diff --git a/include/linux/pgtable.h b/inclu
powerpc 8xx has 4 page sizes:
- 4k
- 16k
- 512k
- 8M
At the time being, vmalloc and vmap only support huge pages which are
leaf at PMD level.
Here the PMD level is 4M, it doesn't correspond to any supported
page size.
For the time being, implement use of 16k and 512k pages which is done
at PTE l
Hi,
On Wed, Apr 28, 2021 at 11:33:24AM +1000, Jordan Niethe wrote:
> On Mon, Apr 26, 2021 at 1:40 AM Jonathan Neuschäfer
> wrote:
> >
> > Hi,
> >
> > I recently booted my Wii again, and I noticed a regression at boot time.
> > Output stops after the "Finalizing device tree... flat tree at 0xX
this patch cause suspend failed on my Bay trail z3735f tablet.
[ 162.038713] PM: dpm_run_callback(): platform_pm_suspend+0x0/0x40 returns -22
[ 162.038760] alarmtimer alarmtimer.0.auto: PM: failed to suspend: error -22
Hello,
On 29/04/2021 02:49:46+0800, youling257 wrote:
> this patch cause suspend failed on my Bay trail z3735f tablet.
>
> [ 162.038713] PM: dpm_run_callback(): platform_pm_suspend+0x0/0x40 returns
> -22
> [ 162.038760] alarmtimer alarmtimer.0.auto: PM: failed to suspend: error -22
I think I
test this patch can fix my problem.
2021-04-29 4:20 GMT+08:00, Alexandre Belloni :
> Hello,
>
> On 29/04/2021 02:49:46+0800, youling257 wrote:
>> this patch cause suspend failed on my Bay trail z3735f tablet.
>>
>> [ 162.038713] PM: dpm_run_callback(): platform_pm_suspend+0x0/0x40
>> returns -22
On Tue, Apr 27, 2021 at 07:05:12AM +0200, Christophe Leroy wrote:
>
>
> Le 26/04/2021 à 22:35, Nathan Chancellor a écrit :
> > Commit 9975f852ce1b ("powerpc/uaccess: Remove calls to __get_user_bad()
> > and __put_user_bad()") switch to BUILD_BUG() in the default case, which
> > leaves x uninitial
Blank line is added after declarations to maintain code uniformity.
Signed-off-by: Sanjana Srinidhi
---
drivers/ps3/ps3av.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/ps3/ps3av.c b/drivers/ps3/ps3av.c
index 9d66257e1da5..c4ea494ce464 100644
--- a/drivers/ps3/ps3av.c
+++ b/driver
Fix some pr_debug() issues in mpc52xx_pci.c:
- use __func__ to print function names
- use "%pr" to print struct resource entries
- use "%pa" to print a resource_size_t (phys_addr_t)
The latter two fix several build warnings:
../arch/powerpc/platforms/52xx/mpc52xx_pci.c: In function 'mpc52xx_pci_
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 possible that this could be optimised to be faster for specific
MMUs.
This
Adding more Strict RWX support on powerpc, in particular Strict Module RWX.
Thanks for all of the feedback everyone.
It is now rebased on linux-next.
For reference the previous revision is available here:
https://lore.kernel.org/linuxppc-dev/20210330045132.722243-1-jniet...@gmail.com/
The change
setup_text_poke_area() is a late init call so it runs before
mark_rodata_ro() and after the init calls. This lets all the init code
patching simply write to their locations. In the future, kprobes is
going to allocate its instruction pages RO which means they will need
setup_text__poke_area() to ha
If MODULES_{VADDR,END} are not defined set them to VMALLOC_START and
VMALLOC_END respectively. This reduces the need for special cases. For
example, powerpc's module_alloc() was previously predicated on
MODULES_VADDR being defined but now is unconditionally defined.
This will be useful reducing co
From: Russell Currey
Add the arch specific insn page allocator for powerpc. This allocates
ROX pages if STRICT_KERNEL_RWX is enabled. These pages are only written
to with patch_instruction() which is able to write RO pages.
Reviewed-by: Daniel Axtens
Signed-off-by: Russell Currey
Signed-off-by
Commit 74451e66d516 ("bpf: make jited programs visible in traces") added
a default bpf_jit_free() implementation. Powerpc did not use the default
bpf_jit_free() as powerpc did not set the images read-only. The default
bpf_jit_free() called bpf_jit_binary_unlock_ro() is why it could not be
used for
Add the necessary call to bpf_jit_binary_lock_ro() to remove write and
add exec permissions to the JIT image after it has finished being
written.
Without CONFIG_STRICT_MODULE_RWX the image will be writable and
executable until the call to bpf_jit_binary_lock_ro().
Signed-off-by: Jordan Niethe
--
From: Russell Currey
To enable strict module RWX on powerpc, set:
CONFIG_STRICT_MODULE_RWX=y
You should also have CONFIG_STRICT_KERNEL_RWX=y set to have any real
security benefit.
ARCH_HAS_STRICT_MODULE_RWX is set to require ARCH_HAS_STRICT_KERNEL_RWX.
This is due to a quirk in arch/Kconfi
From: Christophe Leroy
In addition to the set_memory_xx() functions which allows to change
the memory attributes of not (yet) used memory regions, implement a
set_memory_attr() function to:
- set the final memory protection after init on currently used
kernel regions.
- enable/disable kernel memo
From: Christophe Leroy
Use set_memory_attr() instead of the PPC32 specific change_page_attr()
change_page_attr() was checking that the address was not mapped by
blocks and was handling highmem, but that's unneeded because the
affected pages can't be in highmem and block mapping verification
is a
Le 29/04/2021 à 05:15, Jordan Niethe a écrit :
setup_text_poke_area() is a late init call so it runs before
mark_rodata_ro() and after the init calls. This lets all the init code
patching simply write to their locations. In the future, kprobes is
going to allocate its instruction pages RO whic
struct perf_event_attr supports exclude counting of idle task.
This is sent to kernel via perf_event_attr.exclude_idle and
in perf tool, user can use ":I" event modifier to enable this
for specific event.
Monitor Mode Control Register 2 (MMCR2) SPR has control bits
for each PMCs to freeze counting
Le 29/04/2021 à 05:15, Jordan Niethe a écrit :
If MODULES_{VADDR,END} are not defined set them to VMALLOC_START and
VMALLOC_END respectively. This reduces the need for special cases. For
example, powerpc's module_alloc() was previously predicated on
MODULES_VADDR being defined but now is uncon
From: "Gautham R. Shenoy"
Commit d947fb4c965c ("cpuidle: pseries: Fixup exit latency for
CEDE(0)") sets the exit latency of CEDE(0) based on the latency values
of the Extended CEDE states advertised by the platform
On POWER9 LPARs, the firmwares advertise a very low value of 2us for
CEDE1 exit l
kexec_file_load uses initial_boot_params in setting up the device-tree
for the kernel to be loaded. Though initial_boot_params holds info
about CPUs at the time of boot, it doesn't account for hot added CPUs.
So, kexec'ing with kexec_file_load syscall would leave the kexec'ed
kernel with inaccurat
On 28/04/21 6:02 am, Tyrel Datwyler wrote:
On 4/26/21 9:51 PM, Sourabh Jain wrote:
kexec_file_load uses initial_boot_params in setting up the device-tree
for the kernel to be loaded. Though initial_boot_params holds info
about CPUs at the time of boot, it doesn't account for hot added CPUs.
S
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