On Tue Apr 8, 2025 at 1:11 AM AEST, Alexander Gordeev wrote:
> apply_to_page_range() enters lazy MMU mode and then invokes
> kasan_populate_vmalloc_pte() callback on each page table walk
> iteration. The lazy MMU mode may only be entered only under
> protection of the page table lock. However, the
On Tue Apr 8, 2025 at 1:11 AM AEST, Alexander Gordeev wrote:
> The lazy MMU mode can only be entered and left under the protection
> of the page table locks for all page tables which may be modified.
> Yet, when it comes to kernel mappings apply_to_pte_range() does not
> take any locks. That does n
On Tue Apr 8, 2025 at 1:11 AM AEST, Alexander Gordeev wrote:
> Reverse 'create' vs 'mm == &init_mm' conditions and move
> page table mask modification out of the atomic context.
>
> Signed-off-by: Alexander Gordeev
> ---
> mm/memory.c | 28 +---
> 1 file changed, 17 insert
On Tue Apr 8, 2025 at 1:11 AM AEST, Alexander Gordeev wrote:
> apply_to_page_range() enters lazy MMU mode and then invokes
> kasan_populate_vmalloc_pte() callback on each page table walk
> iteration. The lazy MMU mode may only be entered only under
> protection of the page table lock. However, the
On Thu, Apr 10, 2025 at 01:39:18PM -0500, Dave Marquardt wrote:
> - Replaced BUG_ON calls with WARN_ON calls with error handling,
> with calls to a new ibmveth_reset routine, which resets the device.
> - Added KUnit tests for ibmveth_remove_buffer_from_pool and
> ibmveth_rxq_get_buffer under ne
On Thu, 2025-03-13 at 16:10 -0700, Andrew Morton wrote:
> On Wed, 12 Feb 2025 03:13:57 +1100 Andrew Donnellan
> wrote:
>
> > This reverts commit 931c38e16499 ("mm/page_table_check: remove
> > unused
> > parameter in [__]page_table_check_pud_clear").
> >
> > Reinstate previously unused parameters
From: Rohan McLure
This reverts commit aa232204c468 ("mm/page_table_check: remove unused
parameter in [__]page_table_check_pte_clear").
Reinstate previously unused parameters for the purpose of supporting
powerpc platforms, as many do not encode user/kernel ownership of the
page in the pte, but
From: Rohan McLure
On several powerpc platforms, a page table entry may not imply whether
the relevant mapping is for userspace or kernelspace. Instead, such
platforms infer this by the address which is being accessed.
Add an additional address argument to each of these routines in order to
prov
From: Rohan McLure
The page table check feature requires that pud_pfn() be defined
on each consuming architecture. Since only 64-bit, Book3S platforms
allow for hugepages at this upper level, and since the calling code is
gated by a call to pud_user_accessible_page(), which will return zero,
incl
From: Rohan McLure
This reverts commit a3b837130b58 ("mm/page_table_check: remove unused
parameter in [__]page_table_check_pmd_set").
Reinstate previously unused parameters for the purpose of supporting
powerpc platforms, as many do not encode user/kernel ownership of the
page in the pte, but in
From: Rohan McLure
Page table checking depends on architectures providing an
implementation of p{te,md,ud}_user_accessible_page. With
refactorisations made on powerpc/mm, the pte_access_permitted() and
similar methods verify whether a userland page is accessible with the
required permissions.
Si
From: Rohan McLure
This reverts commit 931c38e16499 ("mm/page_table_check: remove unused
parameter in [__]page_table_check_pud_clear").
Reinstate previously unused parameters for the purpose of supporting
powerpc platforms, as many do not encode user/kernel ownership of the
page in the pte, but
From: Rohan McLure
To provide support for powerpc platforms, provide an addr parameter to
the page_table_check_pte_set() routine. This parameter is needed on some
powerpc platforms which do not encode whether a mapping is for user or
kernel in the pte. On such platforms, this can be inferred form
From: Rohan McLure
In the new set_ptes() API, set_pte_at() (a special case of set_ptes())
is intended to be instrumented by the page table check facility. There
are however several other routines that constitute the API for setting
page table entries, including set_pmd_at() among others. Such rou
From: Rohan McLure
On creation and clearing of a page table mapping, instrument such calls
by invoking page_table_check_pte_set and page_table_check_pte_clear
respectively. These calls serve as a sanity check against illegal
mappings.
Enable ARCH_SUPPORTS_PAGE_TABLE_CHECK for all platforms.
See
Support page table check on all PowerPC platforms. This works by
serialising assignments, reassignments and clears of page table
entries at each level in order to ensure that anonymous mappings
have at most one writable consumer, and likewise that file-backed
mappings are not simultaneously also an
From: Rohan McLure
This reverts commit 6d144436d954 ("mm/page_table_check: remove unused
parameter in [__]page_table_check_pud_set").
Reinstate previously unused parameters for the purpose of supporting
powerpc platforms, as many do not encode user/kernel ownership of the
page in the pte, but in
From: Rohan McLure
This reverts commit 1831414cd729 ("mm/page_table_check: remove unused
parameter in [__]page_table_check_pmd_clear").
Reinstate previously unused parameters for the purpose of supporting
powerpc platforms, as many do not encode user/kernel ownership of the
page in the pte, but
From: Nathan Lynch
[ Upstream commit 0974d03eb479384466d828d65637814bee6b26d7 ]
Smatch warns:
arch/powerpc/kernel/rtas.c:1932 __do_sys_rtas() warn: potential
spectre issue 'args.args' [r] (local cap)
The 'nargs' and 'nret' locals come directly from a user-supplied
buffer and are used as in
Hello All,
I noticed that kexec is broken on the upstream v6.15-rc1 kernel.
My testing was limited to PowerPC (pSeries), but it's possible that
other architectures may have a similar issue.
Both the first and kexec kernel are v6.15-rc1.
Distro: RHEL
Kexec command to load kexec kernel:
-
Le 07/04/2025 à 21:10, Ritesh Harjani (IBM) a écrit :
Madhavan Srinivasan writes:
Commit 3d45a3d0d2e6 ("powerpc: Define config option for processors with broadcast
TLBIE")
We may need to add above to Fixes tag as well, no?
added a config option PPC_RADIX_BROADCAST_TLBIE to support proc
TL;DR: always call the PTE/PMD ctor, passing the appropriate mm to
skip ptlock_init() if unneeded.
__create_pgd_mapping() is used for creating different kinds of
mappings, and may allocate page table pages if passed an allocator
callback. There are currently three such cases:
1. create_pgd_mappin
The generic implementation of pte_{alloc_one,free}_kernel now calls
the [cd]tor. Align the m68k/ColdFire implementation of those
functions by calling the [cd]tor explicitly.
Signed-off-by: Kevin Brodsky
---
arch/m68k/include/asm/mcf_pgalloc.h | 6 +-
1 file changed, 5 insertions(+), 1 deleti
On Thu, 10 Apr 2025 16:50:33 +0200 Alexander Gordeev
wrote:
> On Tue, Apr 08, 2025 at 06:07:32PM +0200, Alexander Gordeev wrote:
>
> Hi Andrew,
>
> > The lazy MMU mode can only be entered and left under the protection
> > of the page table locks for all page tables which may be modified.
>
>
The fsl-mc bus associated to the root DPRC in a DPAA2 system exports a
device file for userspace access to the MC firmware. In case the DPRC's
local MC portal (DPMCP) is currently in use, a new DPMCP device is
allocated through the fsl_mc_portal_allocate() function.
In this case, the call to fsl_m
On Thu, Apr 10, 2025 at 06:11:12PM +0200, Geert Uytterhoeven wrote:
> make dt_binding_check:
>
> Documentation/devicetree/bindings/soc/fsl/fsl,ls1028a-reset.yaml:
> maintainers:0: 'Frank Li' does not match '@'
> from schema $id: http://devicetree.org/meta-schemas/base.yaml#
>
> Fix t
On Tue, Apr 08, 2025 at 08:22:47AM -0700, Dave Hansen wrote:
> Are there any tests for folio_test_pgtable() at free_page() time? If we
> had that, it would make it less likely that another free_page() user
> could sneak in without calling the destructor.
It's hidden, but yes:
static inline bool p
- Replaced BUG_ON calls with WARN_ON calls with error handling,
with calls to a new ibmveth_reset routine, which resets the device.
- Added KUnit tests for ibmveth_remove_buffer_from_pool and
ibmveth_rxq_get_buffer under new IBMVETH_KUNIT_TEST config option.
- Removed unneeded forward declarati
Madhavan Srinivasan writes:
> Commit 3d45a3d0d2e6 ("powerpc: Define config option for processors with
> broadcast TLBIE")
We may need to add above to Fixes tag as well, no?
> added a config option PPC_RADIX_BROADCAST_TLBIE to support processors with
> broadcast TLBIE. Since this option is rele
From: Bartosz Golaszewski
struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.
Signed-off-by: Bartosz Golaszewski
---
arch/powerpc/platforms/52xx/mpc52xx_gpt.c | 6 --
1 file changed, 4 insertion
From: Bartosz Golaszewski
struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.
Signed-off-by: Bartosz Golaszewski
---
arch/powerpc/platforms/44x/gpio.c | 7 ---
1 file changed, 4 insertions(+), 3
From: Stefano Garzarella
This driver does not support interrupts, and receiving the response is
synchronous with sending the command.
So we can set TPM_CHIP_FLAG_SYNC to support synchronous send() and
return responses in the same buffer used for commands. This way we
don't need the 4KB internal
On Mon, Apr 07, 2025 at 11:49:27PM +0530, Sourabh Jain wrote:
>
> [ 90.892796] NIP [c0845eb0] scomp_free_streams+0x6c/0xe8
> [ 90.892803] LR [c0845ee0] scomp_free_streams+0x9c/0xe8
Looks like I never tested 842 which curiously does not have a
self-test. Please try this patch:
From: Bartosz Golaszewski
struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.
Signed-off-by: Bartosz Golaszewski
---
arch/powerpc/sysdev/cpm_common.c | 6 --
1 file changed, 4 insertions(+), 2 d
make dt_binding_check:
Documentation/devicetree/bindings/soc/fsl/fsl,ls1028a-reset.yaml:
maintainers:0: 'Frank Li' does not match '@'
from schema $id: http://devicetree.org/meta-schemas/base.yaml#
Fix this by adding Frank's email address.
Fixes: 9ca5a7d9d2e05de6 ("dt-bindings: s
On Wed, Apr 09, 2025 at 04:56:29PM +0200, Andrey Ryabinin wrote:
Hi Andrey,
...
> >>> - page = __get_free_page(GFP_KERNEL);
> >>> + page = __get_free_page(GFP_ATOMIC);
> >>> if (!page)
> >> I think a better way to fix this would be moving out allocation from
> >> atomic context. Allocate page
On Tue, Apr 08, 2025 at 06:07:32PM +0200, Alexander Gordeev wrote:
Hi Andrew,
> The lazy MMU mode can only be entered and left under the protection
> of the page table locks for all page tables which may be modified.
Heiko Carstens noticed that the above claim is not valid, since
v6.15-rc1 commi
On Thu, 10 Apr 2025 11:16:43 +0200, Herve Codina wrote:
> On SNDRV_PCM_TRIGGER_START event, audio data pointers are not reset.
>
> This leads to wrong data buffer usage when multiple TRIGGER_START are
> received and ends to incorrect buffer usage between the user-space and
> the driver. Indeed, th
Le 10/04/2025 à 11:16, Herve Codina a écrit :
On SNDRV_PCM_TRIGGER_START event, audio data pointers are not reset.
This leads to wrong data buffer usage when multiple TRIGGER_START are
received and ends to incorrect buffer usage between the user-space and
the driver. Indeed, the driver can re
On SNDRV_PCM_TRIGGER_START event, audio data pointers are not reset.
This leads to wrong data buffer usage when multiple TRIGGER_START are
received and ends to incorrect buffer usage between the user-space and
the driver. Indeed, the driver can read data that are not already set by
the user-space
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