Commit Graph

1413143 Commits

Author SHA1 Message Date
Juergen Gross
b0b449e6fe x86/pvlocks: Move paravirt spinlock functions into own header
Instead of having the pv spinlock function definitions in paravirt.h,
move them into the new header paravirt-spinlock.h.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260105110520.21356-22-jgross@suse.com
2026-01-13 14:57:45 +01:00
Juergen Gross
392afe8316 x86/paravirt: Specify pv_ops array in paravirt macros
In order to prepare having multiple pv_ops arrays, specify the array in the
paravirt macros.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260105110520.21356-21-jgross@suse.com
2026-01-13 14:47:29 +01:00
Juergen Gross
560db12560 x86/paravirt: Allow pv-calls outside paravirt.h
In order to prepare for defining paravirt functions outside of paravirt.h,
don't #undef the paravirt call macros.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260105110520.21356-20-jgross@suse.com
2026-01-13 13:50:26 +01:00
Juergen Gross
f88dc319fc objtool: Allow multiple pv_ops arrays
Having a single large pv_ops array has the main disadvantage of needing all
prototypes of the single array members in one header file. This is adding up
to the need to include lots of otherwise unrelated headers.

In order to allow multiple smaller pv_ops arrays dedicated to one area of the
kernel each, allow multiple arrays in objtool.

For better performance limit the possible names of the arrays to start with
"pv_ops".

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260105110520.21356-19-jgross@suse.com
2026-01-13 13:39:49 +01:00
Juergen Gross
7aef17f367 x86/xen: Drop xen_mmu_ops
Instead of having a pre-filled array xen_mmu_ops for Xen PV paravirt
functions, drop the array and assign each element individually.

This is in preparation of reducing the paravirt include hell by
splitting paravirt.h into multiple more fine grained header files,
which will in turn require to split up the pv_ops vector as well.
Dropping the pre-filled array makes life easier for objtool to
detect missing initializers in multiple pv_ops_ arrays.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://patch.msgid.link/20260105110520.21356-18-jgross@suse.com
2026-01-12 21:44:34 +01:00
Juergen Gross
817f66e39e x86/xen: Drop xen_cpu_ops
Instead of having a pre-filled array xen_cpu_ops for Xen PV paravirt
functions, drop the array and assign each element individually.

This is in preparation of reducing the paravirt include hell by
splitting paravirt.h into multiple more fine grained header files,
which will in turn require to split up the pv_ops vector as well.
Dropping the pre-filled array makes life easier for objtool to
detect missing initializers in multiple pv_ops_ arrays.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://patch.msgid.link/20260105110520.21356-17-jgross@suse.com
2026-01-12 19:53:20 +01:00
Juergen Gross
bc5e8e2fa2 x86/xen: Drop xen_irq_ops
Instead of having a pre-filled array xen_irq_ops for Xen PV paravirt
functions, drop the array and assign each element individually.

This is in preparation of reducing the paravirt include hell by
splitting paravirt.h into multiple more fine grained header files,
which will in turn require to split up the pv_ops vector as well.
Dropping the pre-filled array makes life easier for objtool to
detect missing initializers in multiple pv_ops_ arrays.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://patch.msgid.link/20260105110520.21356-16-jgross@suse.com
2026-01-12 19:37:38 +01:00
Juergen Gross
574b3eb843 x86/paravirt: Move pv_native_*() prototypes to paravirt.c
The only reason the pv_native_*() prototypes are needed is the complete
definition of those functions via an asm() statement, which makes it
impossible to have those functions as static ones.

Move the prototypes from paravirt_types.h into paravirt.c, which is the
only source referencing the functions.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260105110520.21356-15-jgross@suse.com
2026-01-12 19:14:06 +01:00
Juergen Gross
f01b4f4a60 x86/paravirt: Introduce new paravirt-base.h header
Move the pv_info related definitions and the declarations of the global
paravirt function primitives into a new header file paravirt-base.h.

Use that header instead of paravirt_types.h in ptrace.h.

Additionally, this is a preparation to reduce the include hell with paravirt
enabled.

  [ bp: Massage commit message. ]

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260105110520.21356-14-jgross@suse.com
2026-01-12 18:58:28 +01:00
Juergen Gross
39965afb11 x86/paravirt: Move paravirt_sched_clock() related code into tsc.c
The only user of paravirt_sched_clock() is in tsc.c, so move the code
from paravirt.c and paravirt.h to tsc.c.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-13-jgross@suse.com
2026-01-12 18:47:39 +01:00
Juergen Gross
589f41f2f0 x86/paravirt: Use common code for paravirt_steal_clock()
Remove the arch-specific variant of paravirt_steal_clock() and use
the common one instead.

With all archs supporting Xen now having been switched to the common
variant, including paravirt.h can be dropped from drivers/xen/time.c.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-12-jgross@suse.com
2026-01-12 16:48:26 +01:00
Juergen Gross
ee9ffcf99f riscv/paravirt: Use common code for paravirt_steal_clock()
Remove the arch specific variant of paravirt_steal_clock() and use
the common one instead.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-11-jgross@suse.com
2026-01-12 16:47:33 +01:00
Juergen Gross
b8431b901e loongarch/paravirt: Use common code for paravirt_steal_clock()
Remove the arch specific variant of paravirt_steal_clock() and use
the common one instead.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-10-jgross@suse.com
2026-01-12 16:47:20 +01:00
Juergen Gross
ad892c4851 arm64/paravirt: Use common code for paravirt_steal_clock()
Remove the arch-specific variant of paravirt_steal_clock() and use
the common one instead.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-9-jgross@suse.com
2026-01-12 16:30:00 +01:00
Juergen Gross
15518e633b arm/paravirt: Use common code for paravirt_steal_clock()
Remove the arch-specific variant of paravirt_steal_clock() and use
the common one instead.

This allows to remove paravirt.c and paravirt.h from arch/arm.

Until all archs supporting Xen have been switched to the common code
of paravirt_steal_clock(), drivers/xen/time.c needs to include
asm/paravirt.h for those archs, while this is not necessary for arm
any longer.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-8-jgross@suse.com
2026-01-12 15:57:23 +01:00
Juergen Gross
e6b2aa6d40 sched: Move clock related paravirt code to kernel/sched
Paravirt clock related functions are available in multiple archs.

In order to share the common parts, move the common static keys
to kernel/sched/ and remove them from the arch specific files.

Make a common paravirt_steal_clock() implementation available in
kernel/sched/cputime.c, guarding it with a new config option
CONFIG_HAVE_PV_STEAL_CLOCK_GEN, which can be selected by an arch
in case it wants to use that common variant.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-7-jgross@suse.com
2026-01-12 15:39:14 +01:00
Juergen Gross
68b10fd40d paravirt: Remove asm/paravirt_api_clock.h
All architectures supporting CONFIG_PARAVIRT share the same contents
of asm/paravirt_api_clock.h:

  #include <asm/paravirt.h>

So remove all incarnations of asm/paravirt_api_clock.h and remove the
only place where it is included, as there asm/paravirt.h is included
anyway.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com> # powerpc, scheduler bits
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-6-jgross@suse.com
2026-01-12 15:34:33 +01:00
Juergen Gross
b49c63eea5 x86/paravirt: Move thunk macros to paravirt_types.h
The macros for generating PV-thunks are part of the generic paravirt
infrastructure, so they should be in paravirt_types.h.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-5-jgross@suse.com
2026-01-12 15:24:05 +01:00
Juergen Gross
d73298f015 x86/paravirt: Remove PARAVIRT_DEBUG config option
The only effect of CONFIG_PARAVIRT_DEBUG set is that instead of doing a call
using a NULL pointer a BUG() is being raised.

While the BUG() will be a little bit easier to analyse, the call of NULL isn't
really that difficult to find the reason for.

Remove the config option to make paravirt coding a little bit less annoying.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-4-jgross@suse.com
2026-01-12 15:20:06 +01:00
Juergen Gross
e0b4904a40 x86/paravirt: Remove some unneeded struct declarations
In paravirt_types.h and paravirt.h there are some struct declarations which
are not needed. Remove them.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-3-jgross@suse.com
2026-01-12 15:17:00 +01:00
Juergen Gross
07f2961235 x86/paravirt: Remove not needed includes of paravirt.h
In some places asm/paravirt.h is included without really being needed.

Remove the related #include statements.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-2-jgross@suse.com
2026-01-12 11:26:52 +01:00
Linus Torvalds
0f61b1860c Linux 6.19-rc5 v6.19-rc5 2026-01-11 17:03:14 -10:00
Linus Torvalds
7143203341 Merge tag 'libcrypto-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux
Pull crypto library fixes from Eric Biggers:

 - A couple more fixes for the lib/crypto KUnit tests

 - Fix missing MMU protection for the AES S-box

* tag 'libcrypto-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux:
  lib/crypto: aes: Fix missing MMU protection for AES S-box
  MAINTAINERS: add test vector generation scripts to "CRYPTO LIBRARY"
  lib/crypto: tests: Fix syntax error for old python versions
  lib/crypto: tests: polyval_kunit: Increase iterations for preparekey in IRQs
2026-01-11 15:07:56 -10:00
Linus Torvalds
9c7ef209cd Merge tag 'char-misc-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
 "Here are some small char/misc driver fixes for some reported issues.
  Included in here is:

   - much reported rust_binder fix

   - counter driver fixes

   - new device ids for the mei driver

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  rust_binder: remove spin_lock() in rust_shrink_free_page()
  mei: me: add nova lake point S DID
  counter: 104-quad-8: Fix incorrect return value in IRQ handler
  counter: interrupt-cnt: Drop IRQF_NO_THREAD flag
2026-01-11 07:27:44 -10:00
Linus Torvalds
316a94cb63 Merge tag 'x86-urgent-2026-01-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fix from Ingo Molnar:
 "Disable GCOV instrumentation in the SEV noinstr.c collection of SEV
  noinstr methods, to further robustify the code"

* tag 'x86-urgent-2026-01-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sev: Disable GCOV on noinstr object
2026-01-11 07:19:43 -10:00
Linus Torvalds
fac4bdbaca Merge tag 'sched-urgent-2026-01-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
 "Fix a crash in sched_mm_cid_after_execve()"

* tag 'sched-urgent-2026-01-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/mm_cid: Prevent NULL mm dereference in sched_mm_cid_after_execve()
2026-01-11 07:11:53 -10:00
Linus Torvalds
fe948326e9 Merge tag 'perf-urgent-2026-01-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf event fix from Ingo Molnar:
 "Fix perf swevent hrtimer deinit regression"

* tag 'perf-urgent-2026-01-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Ensure swevent hrtimer is properly destroyed
2026-01-11 06:55:27 -10:00
Linus Torvalds
88730166f3 Merge tag 'irq-urgent-2026-01-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc irqchip fixes from Ingo Molnar:

 - Fix an endianness bug in the gic-v5 irqchip driver

 - Revert a broken commit from the riscv-imsic irqchip driver

* tag 'irq-urgent-2026-01-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "irqchip/riscv-imsic: Embed the vector array in lpriv"
  irqchip/gic-v5: Fix gicv5_its_map_event() ITTE read endianness
2026-01-11 06:36:20 -10:00
Thomas Gleixner
2e4b28c48f treewide: Update email address
In a vain attempt to consolidate the email zoo switch everything to the
kernel.org account.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-01-11 06:09:11 -10:00
Linus Torvalds
755bc1335e Merge tag 'riscv-for-linus-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Paul Walmsley:
 "Notable changes include a fix to close one common microarchitectural
  attack vector for out-of-order cores. Another patch exposed an
  omission in my boot test coverage, which is currently missing
  relocatable kernels. Otherwise, the fixes seem to be settling down for
  us.

   - Fix CONFIG_RELOCATABLE=y boots by building Image files from
     vmlinux, rather than vmlinux.unstripped, now that the .modinfo
     section is included in vmlinux.unstripped

   - Prevent branch predictor poisoning microarchitectural attacks that
     use the syscall index as a vector by using array_index_nospec() to
     clamp the index after the bounds check (as x86 and ARM64 already
     do)

   - Fix a crash in test_kprobes when building with Clang

   - Fix a deadlock possible when tracing is enabled for SBI ecalls

   - Fix the definition of the Zk standard RISC-V ISA extension bundle,
     which was missing the Zknh extension

   - A few other miscellaneous non-functional cleanups, removing unused
     macros, fixing an out-of-date path in code comments, resolving a
     compile-time warning for a type mismatch in a pr_crit(), and
     removing an unnecessary header file inclusion"

* tag 'riscv-for-linus-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: trace: fix snapshot deadlock with sbi ecall
  riscv: remove irqflags.h inclusion in asm/bitops.h
  riscv: cpu_ops_sbi: smp_processor_id() returns int, not unsigned int
  riscv: configs: Clean up references to non-existing configs
  riscv: kexec_image: Fix dead link to boot-image-header.rst
  riscv: pgtable: Cleanup useless VA_USER_XXX definitions
  riscv: cpufeature: Fix Zk bundled extension missing Zknh
  riscv: fix KUnit test_kprobes crash when building with Clang
  riscv: Sanitize syscall table indexing under speculation
  riscv: boot: Always make Image from vmlinux, not vmlinux.unstripped
2026-01-10 15:54:41 -10:00
Linus Torvalds
0fa27899e0 Merge tag 'driver-core-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core fixes from Danilo Krummrich:

 - Fix swapped example values for the `family` and `machine` attributes
   in the sysfs SoC bus ABI documentation

 - Fix Rust build and intra-doc issues when optional subsystems
   (CONFIG_PCI, CONFIG_AUXILIARY_BUS, CONFIG_PRINTK) are disabled

 - Fix typos and incorrect safety comments in Rust PCI, DMA, and
   device ID documentation

* tag 'driver-core-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core:
  rust: device: Remove explicit import of CStrExt
  rust: pci: fix typos in Bar struct's comments
  rust: device: fix broken intra-doc links
  rust: dma: fix broken intra-doc links
  rust: driver: fix broken intra-doc links to example driver types
  rust: device_id: replace incorrect word in safety documentation
  rust: dma: remove incorrect safety documentation
  docs: ABI: sysfs-devices-soc: Fix swapped sample values
2026-01-10 15:04:04 -10:00
Linus Torvalds
b061fcffe3 Merge tag 'linux_kselftest-fixes-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kselftest fix from Shuah Khan:
 "Fix tracing test_multiple_writes stalls when buffer_size_kb is less
  than 12KB"

* tag 'linux_kselftest-fixes-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/tracing: Fix test_multiple_writes stall
2026-01-10 14:57:55 -10:00
Linus Torvalds
97313d6113 Merge tag 'iommu-fixes-v6.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux
Pull iomu fixes from Joerg Roedel:

 - several Kconfig-related build fixes

 - fix for when gcc 8.5 on PPC refuses to inline a function from a
   header file

* tag 'iommu-fixes-v6.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux:
  iommupt: Make pt_feature() always_inline
  iommufd/selftest: Prevent module/builtin conflicts in kconfig
  iommufd/selftest: Add missing kconfig for DMA_SHARED_BUFFER
  iommupt: Fix the kunit building
2026-01-10 07:14:40 -10:00
Gao Xiang
7893cc1225 erofs: fix file-backed mounts no longer working on EROFS partitions
Sheng Yong reported [1] that Android APEX images didn't work with commit
072a7c7cdb ("erofs: don't bother with s_stack_depth increasing for
now") because "EROFS-formatted APEX file images can be stored within an
EROFS-formatted Android system partition."

In response, I sent a quick fat-fingered [PATCH v3] to address the
report.  Unfortunately, the updated condition was incorrect:

         if (erofs_is_fileio_mode(sbi)) {
-            sb->s_stack_depth =
-                file_inode(sbi->dif0.file)->i_sb->s_stack_depth + 1;
-            if (sb->s_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) {
-                erofs_err(sb, "maximum fs stacking depth exceeded");
+            inode = file_inode(sbi->dif0.file);
+            if ((inode->i_sb->s_op == &erofs_sops && !sb->s_bdev) ||
+                inode->i_sb->s_stack_depth) {

The condition `!sb->s_bdev` is always true for all file-backed EROFS
mounts, making the check effectively a no-op.

The real fix tested and confirmed by Sheng Yong [2] at that time was
[PATCH v3 RESEND], which correctly ensures the following EROFS^2 setup
works:
    EROFS (on a block device) + EROFS (file-backed mount)

But sadly I screwed it up again by upstreaming the outdated [PATCH v3].

This patch applies the same logic as the delta between the upstream
[PATCH v3] and the real fix [PATCH v3 RESEND].

Reported-by: Sheng Yong <shengyong1@xiaomi.com>
Closes: https://lore.kernel.org/r/3acec686-4020-4609-aee4-5dae7b9b0093@gmail.com [1]
Fixes: 072a7c7cdb ("erofs: don't bother with s_stack_depth increasing for now")
Link: https://lore.kernel.org/r/243f57b8-246f-47e7-9fb1-27a771e8e9e8@gmail.com [2]
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-01-10 06:39:20 -10:00
Jason Gunthorpe
6a3d5fda2c iommupt: Make pt_feature() always_inline
gcc 8.5 on powerpc does not automatically inline these functions even
though they evaluate to constants in key cases. Since the constant
propagation is essential for some code elimination and built-time checks
this causes a build failure:

 ERROR: modpost: "__pt_no_sw_bit" [drivers/iommu/generic_pt/fmt/iommu_amdv1.ko] undefined!

Caused by this:

	if (pts_feature(&pts, PT_FEAT_DMA_INCOHERENT) &&
	    !pt_test_sw_bit_acquire(&pts,
				    SW_BIT_CACHE_FLUSH_DONE))
		flush_writes_item(&pts);

Where pts_feature() evaluates to a constant false. Mark them as
__always_inline to force it to evaluate to a constant and trigger the code
elimination.

Fixes: 7c5b184db7 ("genpt: Generic Page Table base API")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202512230720.9y9DtWIo-lkp@intel.com/
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2026-01-10 10:50:45 +01:00
Jason Gunthorpe
7adfd68274 iommufd/selftest: Prevent module/builtin conflicts in kconfig
The selftest now depends on the AMDv1 page table, however the selftest
kconfig itself is just an sub-option of the main IOMMUFD module kconfig.

This means it cannot be modular and so kconfig allowed a modular
IOMMU_PT_AMDV1 with a built in IOMMUFD. This causes link failures:

   ld: vmlinux.o: in function `mock_domain_alloc_pgtable.isra.0':
   selftest.c:(.text+0x12e8ad3): undefined reference to `pt_iommu_amdv1_init'
   ld: vmlinux.o: in function `BSWAP_SHUFB_CTL':
   sha1-avx2-asm.o:(.rodata+0xaa36a8): undefined reference to `pt_iommu_amdv1_read_and_clear_dirty'
   ld: sha1-avx2-asm.o:(.rodata+0xaa36f0): undefined reference to `pt_iommu_amdv1_map_pages'
   ld: sha1-avx2-asm.o:(.rodata+0xaa36f8): undefined reference to `pt_iommu_amdv1_unmap_pages'
   ld: sha1-avx2-asm.o:(.rodata+0xaa3720): undefined reference to `pt_iommu_amdv1_iova_to_phys'

Adjust the kconfig to disable IOMMUFD_TEST if IOMMU_PT_AMDV1 is incompatible.

Fixes: e93d5945ed ("iommufd: Change the selftest to use iommupt instead of xarray")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202512210135.freQWpxa-lkp@intel.com/
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2026-01-10 10:40:58 +01:00
Jason Gunthorpe
faa37ff3bf iommufd/selftest: Add missing kconfig for DMA_SHARED_BUFFER
The test doesn't build without it, dma-buf.h does not provide stub
functions if it is not enabled. Compilation can fail with:

 ERROR:root:ld: vmlinux.o: in function `iommufd_test':
 (.text+0x3b1cdd): undefined reference to `dma_buf_get'
 ld: (.text+0x3b1d08): undefined reference to `dma_buf_put'
 ld: (.text+0x3b2105): undefined reference to `dma_buf_export'
 ld: (.text+0x3b211f): undefined reference to `dma_buf_fd'
 ld: (.text+0x3b2e47): undefined reference to `dma_buf_move_notify'

Add the missing select.

Fixes: d2041f1f11 ("iommufd/selftest: Add some tests for the dmabuf flow")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2026-01-10 10:40:58 +01:00
Jason Gunthorpe
cefd81e76a iommupt: Fix the kunit building
The kunit doesn't work since the below commit made GENERIC_PT
unselectable:

 $ make ARCH=x86_64 O=build_kunit_x86_64 olddefconfig
 ERROR:root:Not all Kconfig options selected in kunitconfig were in the generated .config.
 This is probably due to unsatisfied dependencies.
 Missing: CONFIG_DEBUG_GENERIC_PT=y, CONFIG_IOMMUFD_TEST=y,
 CONFIG_IOMMU_PT_X86_64=y, CONFIG_GENERIC_PT=y, CONFIG_IOMMU_PT_AMDV1=y,
 CONFIG_IOMMU_PT_VTDSS=y, CONFIG_IOMMU_PT=y, CONFIG_IOMMU_PT_KUNIT_TEST=y

Also remove the unneeded CONFIG_IOMMUFD_TEST reference as the iommupt kunit
doesn't interact with iommufd, and it doesn't currently build for the
kunit due problems with DMA_SHARED buffer either.

Fixes: 01569c216d ("genpt: Make GENERIC_PT invisible")
Fixes: 1dd4187f53 ("iommupt: Add a kunit test for Generic Page Table")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2026-01-10 10:40:57 +01:00
Linus Torvalds
b6151c4e60 Merge tag 'erofs-for-6.19-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs
Pull erofs fix from Gao Xiang:

 - Don't increase s_stack_depth which caused regressions in some
   composefs mount setups (EROFS + ovl^2)

   Instead just allow one extra unaccounted fs stacking level for
   straightforward cases.

* tag 'erofs-for-6.19-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: don't bother with s_stack_depth increasing for now
2026-01-09 19:34:50 -10:00
Gao Xiang
072a7c7cdb erofs: don't bother with s_stack_depth increasing for now
Previously, commit d53cd891f0 ("erofs: limit the level of fs stacking
for file-backed mounts") bumped `s_stack_depth` by one to avoid kernel
stack overflow when stacking an unlimited number of EROFS on top of
each other.

This fix breaks composefs mounts, which need EROFS+ovl^2 sometimes
(and such setups are already used in production for quite a long time).

One way to fix this regression is to bump FILESYSTEM_MAX_STACK_DEPTH
from 2 to 3, but proving that this is safe in general is a high bar.

After a long discussion on GitHub issues [1] about possible solutions,
one conclusion is that there is no need to support nesting file-backed
EROFS mounts on stacked filesystems, because there is always the option
to use loopback devices as a fallback.

As a quick fix for the composefs regression for this cycle, instead of
bumping `s_stack_depth` for file backed EROFS mounts, we disallow
nesting file-backed EROFS over EROFS and over filesystems with
`s_stack_depth` > 0.

This works for all known file-backed mount use cases (composefs,
containerd, and Android APEX for some Android vendors), and the fix is
self-contained.

Essentially, we are allowing one extra unaccounted fs stacking level of
EROFS below stacking filesystems, but EROFS can only be used in the read
path (i.e. overlayfs lower layers), which typically has much lower stack
usage than the write path.

We can consider increasing FILESYSTEM_MAX_STACK_DEPTH later, after more
stack usage analysis or using alternative approaches, such as splitting
the `s_stack_depth` limitation according to different combinations of
stacking.

Fixes: d53cd891f0 ("erofs: limit the level of fs stacking for file-backed mounts")
Reported-and-tested-by: Dusty Mabe <dusty@dustymabe.com>
Reported-by: Timothée Ravier <tim@siosm.fr>
Closes: https://github.com/coreos/fedora-coreos-tracker/issues/2087 [1]
Reported-by: "Alekséi Naidénov" <an@digitaltide.io>
Closes: https://lore.kernel.org/r/CAFHtUiYv4+=+JP_-JjARWjo6OwcvBj1wtYN=z0QXwCpec9sXtg@mail.gmail.com
Acked-by: Amir Goldstein <amir73il@gmail.com>
Acked-by: Alexander Larsson <alexl@redhat.com>
Reviewed-and-tested-by: Sheng Yong <shengyong1@xiaomi.com>
Reviewed-by: Zhiguo Niu <zhiguo.niu@unisoc.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
2026-01-10 13:01:15 +08:00
Linus Torvalds
cb2076b091 Merge tag 'block-6.19-20260109' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
Pull block fixes from Jens Axboe:

 - Kill unlikely checks for blk-rq-qos. These checks are really
   all-or-nothing, either the branch is taken all the time, or it's not.
   Depending on the configuration, either one of those cases may be
   true. Just remove the annotation

 - Fix for merging bios with different app tags set

 - Fix for a recently introduced slowdown due to RCU synchronization

 - Fix for a status change on loop while it's in use, and then a later
   fix for that fix

 - Fix for the async partition scanning in ublk

* tag 'block-6.19-20260109' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  ublk: fix use-after-free in ublk_partition_scan_work
  blk-mq: avoid stall during boot due to synchronize_rcu_expedited
  loop: add missing bd_abort_claiming in loop_set_status
  block: don't merge bios with different app_tags
  blk-rq-qos: Remove unlikely() hints from QoS checks
  loop: don't change loop device under exclusive opener in loop_set_status
2026-01-09 15:42:46 -10:00
Linus Torvalds
68ad2095ca Merge tag 'io_uring-6.19-20260109' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
Pull io_uring fixes from Jens Axboe:
 "A single fix for a regression introduced in 6.15, where a failure to
  wake up idle io-wq workers at ring exit will wait for the timeout to
  expire.

  This isn't normally noticeable, as the exit is async.

  But if a parent task created a thread that sets up a ring and uses
  requests that cause io-wq threads to be created, and the parent task
  then waits for the thread to exit, then it can take 5 seconds for that
  pthread_join() to succeed as the child thread is waiting for its
  children to exit.

  On top of that, just a basic cleanup as well"

* tag 'io_uring-6.19-20260109' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  io_uring/io-wq: remove io_wq_for_each_worker() return value
  io_uring/io-wq: fix incorrect io_wq_for_each_worker() termination logic
2026-01-09 15:21:15 -10:00
Linus Torvalds
e28ddd0b7a Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:

 - Do not return false if !preemptible() in current_in_efi(). EFI
   runtime services can now run with preemption enabled

 - Fix uninitialised variable in the arm MPAM driver, reported by sparse

 - Fix partial kasan_reset_tag() use in change_memory_common() when
   calculating page indices or comparing ranges

 - Save/restore TCR2_EL1 during suspend/resume, otherwise the E0POE bit
   is lost

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Fix cleared E0POE bit after cpu_suspend()/resume()
  arm64: mm: Fix incomplete tag reset in change_memory_common()
  arm_mpam: Stop using uninitialized variables in __ris_msmon_read()
  arm64/efi: Don't fail check current_in_efi() if preemptible
2026-01-09 15:17:48 -10:00
Linus Torvalds
e55feea3a0 Merge tag 'soc-fixes-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC fixes from Arnd Bergmann:
 "The main code change is a revert of the Raspberry Pi RP1 overlay
  support that was decided to not be ready.

  The other fixes are all for devicetree sources:

   - ethernet configuration on ixp42x-actiontec-mi424wr is board
     revision specific

   - validation warning fixes for imx27/imx51/imx6, hikey960 and k3

   - Minor corrections across imx8 boards, addressing all types of
     issues with interrups, dma, ethernet and clock settings, all simple
     one-line changes"

* tag 'soc-fixes-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (25 commits)
  arm64: dts: hisilicon: hikey960: Drop "snps,gctl-reset-quirk" and "snps,tx_de_emphasis*" properties
  Documentation/process: maintainer-soc: Mark 'make' as commands
  Documentation/process: maintainer-soc: Be more explicit about defconfig
  arm64: dts: mba8mx: Fix Ethernet PHY IRQ support
  arm64: dts: imx8qm-ss-dma: correct the dma channels of lpuart
  arm64: dts: imx8mp: Fix LAN8740Ai PHY reference clock on DH electronics i.MX8M Plus DHCOM
  arm64: dts: freescale: tx8p-ml81: fix eqos nvmem-cells
  arm64: dts: freescale: moduline-display: fix compatible
  dt-bindings: arm: fsl: moduline-display: fix compatible
  ARM: dts: imx6q-ba16: fix RTC interrupt level
  arm64: dts: freescale: imx95-toradex-smarc: fix SMARC_SDIO_WP label position
  arm64: dts: freescale: imx95-toradex-smarc: use edge trigger for ethphy1 interrupt
  arm64: dts: add off-on-delay-us for usdhc2 regulator
  arm64: dts: imx8qm-mek: correct the light sensor interrupt type to low level
  ARM: dts: nxp: imx: Fix mc13xxx LED node names
  arm64: dts: imx95: correct I3C2 pclk to IMX95_CLK_BUSWAKEUP
  MAINTAINERS: Fix a linusw mail address
  arm64: dts: broadcom: rp1: drop RP1 overlay
  arm64: dts: broadcom: bcm2712: fix RP1 endpoint PCI topology
  misc: rp1: drop overlay support
  ...
2026-01-09 15:11:45 -10:00
Linus Torvalds
4621c338d3 Merge tag 'ceph-for-6.19-rc5' of https://github.com/ceph/ceph-client
Pull ceph fixes from Ilya Dryomov:
 "A bunch of libceph fixes split evenly between memory safety and
  implementation correctness issues (all marked for stable) and a change
  in maintainers for CephFS: Slava and Alex have formally taken over
  Xiubo's role"

* tag 'ceph-for-6.19-rc5' of https://github.com/ceph/ceph-client:
  libceph: make calc_target() set t->paused, not just clear it
  libceph: reset sparse-read state in osd_fault()
  libceph: return the handler error from mon_handle_auth_done()
  libceph: make free_choose_arg_map() resilient to partial allocation
  ceph: update co-maintainers list in MAINTAINERS
  libceph: replace overzealous BUG_ON in osdmap_apply_incremental()
  libceph: prevent potential out-of-bounds reads in handle_auth_done()
2026-01-09 15:05:19 -10:00
Fushuai Wang
6e39903c73 selftests/tracing: Fix test_multiple_writes stall
When /sys/kernel/tracing/buffer_size_kb is less than 12KB,
the test_multiple_writes test will stall and wait for more
input due to insufficient buffer space.

Check current buffer_size_kb value before the test. If it is
less than 12KB, it temporarily increase the buffer to 12KB,
and restore the original value after the tests are completed.

Link: https://lore.kernel.org/r/20260109033620.25727-1-fushuai.wang@linux.dev
Fixes: 37f4660138 ("selftests/tracing: Add basic test for trace_marker_raw file")
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Fushuai Wang <wangfushuai@baidu.com>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2026-01-09 15:49:32 -07:00
Linus Torvalds
372800cb95 Merge tag 'for-6.19-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:

 - fix potential NULL pointer dereference when replaying tree log after
   an error

 - release path before initializing extent tree to avoid potential
   deadlock when allocating new inode

 - on filesystems with block size > page size
    - fix potential read out of bounds during encoded read of an inline
      extent
    - only enforce free space tree if v1 cache is required

 - print correct tree id in error message

* tag 'for-6.19-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: show correct warning if can't read data reloc tree
  btrfs: fix NULL pointer dereference in do_abort_log_replay()
  btrfs: force free space tree for bs > ps cases
  btrfs: only enforce free space tree if v1 cache is required for bs < ps cases
  btrfs: release path before initializing extent tree in btrfs_read_locked_inode()
  btrfs: avoid access-beyond-folio for bs > ps encoded writes
2026-01-09 07:02:38 -10:00
Linus Torvalds
4d6fe1dd12 Merge tag 'pci-v6.19-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull PCI fixes from Bjorn Helgaas:

 - Remove ASPM L0s support for MSM8996 SoC since we now enable L0s when
   advertised, and it caused random hangs on this device (Manivannan
   Sadhasivam)

 - Fix meson-pcie to report that the link is up while in ASPM L0s or L1,
   since those are active states from the software point of view, and
   treating the link as down caused config access failures (Bjorn
   Helgaas)

 - Fix up sparc DTS BAR descriptions that are above 4GB but not marked
   as prefetchable, which caused resource assignment and driver probe
   failures after we converted from the SPARC pcibios_enable_device() to
   the generic version (Ilpo Järvinen)

* tag 'pci-v6.19-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
  sparc/PCI: Correct 64-bit non-pref -> pref BAR resources
  PCI: meson: Report that link is up while in ASPM L0s and L1 states
  PCI: qcom: Remove ASPM L0s support for MSM8996 SoC
2026-01-09 06:41:10 -10:00
Linus Torvalds
553410fcb9 Merge tag 'acpi-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI support fix from Rafael Wysocki:
 "This fixes the ACPI/PCI legacy interrupts (INTx) parsing in the case
  when the ACPI Global System Interrupt (GSI) value is a 32-bit one with
  the MSB set.

  That was interpreted as a negative integer and caused
  acpi_pci_link_allocate_irq() to fail and acpi_irq_get_penalty() to
  trigger an out-of-bounds array dereference (Lorenzo Pieralisi)"

* tag 'acpi-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: PCI: IRQ: Fix INTx GSIs signedness
2026-01-09 06:20:15 -10:00
Linus Torvalds
81c5ffec9e Merge tag 'pm-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fix from Rafael Wysocki:
 "This fixes a crash in the hibernation image saving code that can be
  triggered when the given compression algorithm is unavailable (Malaya
  Kumar Rout)"

* tag 'pm-6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM: hibernate: Fix crash when freeing invalid crypto compressor
2026-01-09 06:18:05 -10:00