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1,412,555 commits

Author SHA1 Message Date
Ingo Molnar
dde3763365 sched/headers: Remove whitespace noise from kernel/sched/sched.h
A single case of space-Tab noise snuck in recently.

Fixes: 36569780b0 ("sched: Change nr_uninterruptible type to unsigned long")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://patch.msgid.link/176478595428.498.13816176784792752599.tip-bot2@tip-bot2
2025-12-06 10:03:13 +01:00
Peter Zijlstra
90dfeef1cd seqlock: Cure some more scoped_seqlock() optimization fails
Arnd reported an x86 randconfig using gcc-15 tripped over
__scoped_seqlock_bug(). Turns out GCC chose not to inline the
scoped_seqlock helper functions and as such was not able to optimize
properly.

[ mingo: Clang fails the build too in some circumstances. ]

Reported-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Link: https://patch.msgid.link/20251204104332.GG2528459@noisy.programming.kicks-ass.net
2025-12-06 09:53:05 +01:00
Linus Torvalds
416f99c3b1 Driver core changes for 6.19-rc1
- Arch Topology:
   - Move parse_acpi_topology() from arm64 to common code for reuse in RISC-V
 
 - CPU:
   - Expose housekeeping CPUs through /sys/devices/system/cpu/housekeeping
   - Print a newline (or 0x0A) instead of '(null)' reading
     /sys/devices/system/cpu/nohz_full when nohz_full= is not set
 
 - debugfs
   - Remove (broken) 'no-mount' mode
   - Remove redundant access mode checks in debugfs_get_tree() and
     debugfs_create_*() functions
 
 - Devres:
   - Remove unused devm_free_percpu() helper
   - Move devm_alloc_percpu() from device.h to devres.h
 
 - Firmware Loader:
   - Replace simple_strtol() with kstrtoint()
   - Do not call cancel_store() when no upload is in progress
 
 - kernfs:
   - Increase struct super_block::maxbytes to MAX_LFS_FILESIZE
   - Fix a missing unwind path in __kernfs_new_node()
 
 - Misc:
   - Increase the name size in struct auxiliary_device_id to 40 characters
   - Replace system_unbound_wq with system_dfl_wq and add WQ_PERCPU to
     alloc_workqueue()
 
 - Platform:
   - Replace ERR_PTR() with IOMEM_ERR_PTR() in platform ioremap functions
 
 - Rust:
   - Auxiliary:
     - Unregister auxiliary device on parent device unbind
     - Move parent() to impl Device; implement device context aware parent() for
       Device<Bound>
     - Illustrate how to safely obtain a driver's device private data when
       calling from an auxiliary driver into the parant device driver
 
   - DebugFs:
     - Implement support for binary large objects
 
   - Device:
     - Let probe() return the driver's device private data as pinned initializer,
       i.e. impl PinInit<Self, Error>
     - Implement safe accessor for a driver's device private data for
       Device<Bound> (returned reference can't out-live driver binding and
       guarantees the correct private data type)
     - Implement AsBusDevice trait, to be used by class device abstractions to
       derive the bus device type of the parent device
 
   - DMA:
     - Store raw pointer of allocation as NonNull
     - Use start_ptr() and start_ptr_mut() to inherit correct mutability of self
 
   - FS:
     - Add file::Offset type alias
 
   - I2C:
     - Add abstractions for I2C device / driver infrastructure
     - Implement abstractions for manual I2C device registrations
 
   - I/O:
     - Use "kernel vertical" style for imports
     - Define ResourceSize as resource_size_t
     - Move ResourceSize to top-level I/O module
     - Add type alias for phys_addr_t
     - Implement Rust version of read_poll_timeout_atomic()
 
   - PCI:
     - Use "kernel vertical" style for imports
     - Move I/O and IRQ infrastructure to separate files
     - Add support for PCI interrupt vectors
     - Implement TryInto<IrqRequest<'a>> for IrqVector<'a> to convert an
       IrqVector bound to specific pci::Device into an IrqRequest bound to the
       same pci::Device's parent Device
     - Leverage pin_init_scope() to get rid of redundant Result in IRQ methods
 
   - PinInit:
     - Add {pin_}init_scope() to execute code before creating an initializer
 
   - Platform:
     - Leverage pin_init_scope() to get rid of redundant Result in IRQ methods
 
   - Timekeeping:
     - Implement abstraction of udelay()
 
   - Uaccess:
     - Implement read_slice_partial() and read_slice_file() for UserSliceReader
     - Implement write_slice_partial() and write_slice_file() for UserSliceWriter
 
 - sysfs
   - Prepare the constification of struct attribute
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Merge tag 'driver-core-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

Pull driver core updates from Danilo Krummrich:
 "Arch Topology:
   - Move parse_acpi_topology() from arm64 to common code for reuse in
     RISC-V

  CPU:
   - Expose housekeeping CPUs through /sys/devices/system/cpu/housekeeping
   - Print a newline (or 0x0A) instead of '(null)' reading
     /sys/devices/system/cpu/nohz_full when nohz_full= is not set

  debugfs
   - Remove (broken) 'no-mount' mode
   - Remove redundant access mode checks in debugfs_get_tree() and
     debugfs_create_*() functions

  Devres:
   - Remove unused devm_free_percpu() helper
   - Move devm_alloc_percpu() from device.h to devres.h

  Firmware Loader:
   - Replace simple_strtol() with kstrtoint()
   - Do not call cancel_store() when no upload is in progress

  kernfs:
   - Increase struct super_block::maxbytes to MAX_LFS_FILESIZE
   - Fix a missing unwind path in __kernfs_new_node()

  Misc:
   - Increase the name size in struct auxiliary_device_id to 40
     characters
   - Replace system_unbound_wq with system_dfl_wq and add WQ_PERCPU to
     alloc_workqueue()

  Platform:
   - Replace ERR_PTR() with IOMEM_ERR_PTR() in platform ioremap
     functions

  Rust:
   - Auxiliary:
      - Unregister auxiliary device on parent device unbind
      - Move parent() to impl Device; implement device context aware
        parent() for Device<Bound>
      - Illustrate how to safely obtain a driver's device private data
        when calling from an auxiliary driver into the parant device
        driver

   - DebugFs:
      - Implement support for binary large objects

   - Device:
      - Let probe() return the driver's device private data as pinned
        initializer, i.e. impl PinInit<Self, Error>
      - Implement safe accessor for a driver's device private data for
        Device<Bound> (returned reference can't out-live driver binding
        and guarantees the correct private data type)
      - Implement AsBusDevice trait, to be used by class device
        abstractions to derive the bus device type of the parent device

   - DMA:
      - Store raw pointer of allocation as NonNull
      - Use start_ptr() and start_ptr_mut() to inherit correct
        mutability of self

   - FS:
      - Add file::Offset type alias

   - I2C:
      - Add abstractions for I2C device / driver infrastructure
      - Implement abstractions for manual I2C device registrations

   - I/O:
      - Use "kernel vertical" style for imports
      - Define ResourceSize as resource_size_t
      - Move ResourceSize to top-level I/O module
      - Add type alias for phys_addr_t
      - Implement Rust version of read_poll_timeout_atomic()

   - PCI:
      - Use "kernel vertical" style for imports
      - Move I/O and IRQ infrastructure to separate files
      - Add support for PCI interrupt vectors
      - Implement TryInto<IrqRequest<'a>> for IrqVector<'a> to convert
        an IrqVector bound to specific pci::Device into an IrqRequest
        bound to the same pci::Device's parent Device
      - Leverage pin_init_scope() to get rid of redundant Result in IRQ
        methods

   - PinInit:
      - Add {pin_}init_scope() to execute code before creating an
        initializer

   - Platform:
      - Leverage pin_init_scope() to get rid of redundant Result in IRQ
        methods

   - Timekeeping:
      - Implement abstraction of udelay()

   - Uaccess:
      - Implement read_slice_partial() and read_slice_file() for
        UserSliceReader
      - Implement write_slice_partial() and write_slice_file() for
        UserSliceWriter

  sysfs:
   - Prepare the constification of struct attribute"

* tag 'driver-core-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (75 commits)
  rust: pci: fix build failure when CONFIG_PCI_MSI is disabled
  debugfs: Fix default access mode config check
  debugfs: Remove broken no-mount mode
  debugfs: Remove redundant access mode checks
  driver core: Check drivers_autoprobe for all added devices
  driver core: WQ_PERCPU added to alloc_workqueue users
  driver core: replace use of system_unbound_wq with system_dfl_wq
  tick/nohz: Expose housekeeping CPUs in sysfs
  tick/nohz: avoid showing '(null)' if nohz_full= not set
  sysfs/cpu: Use DEVICE_ATTR_RO for nohz_full attribute
  kernfs: fix memory leak of kernfs_iattrs in __kernfs_new_node
  fs/kernfs: raise sb->maxbytes to MAX_LFS_FILESIZE
  mod_devicetable: Bump auxiliary_device_id name size
  sysfs: simplify attribute definition macros
  samples/kobject: constify 'struct foo_attribute'
  samples/kobject: add is_visible() callback to attribute group
  sysfs: attribute_group: enable const variants of is_visible()
  sysfs: introduce __SYSFS_FUNCTION_ALTERNATIVE()
  sysfs: transparently handle const pointers in ATTRIBUTE_GROUPS()
  sysfs: attribute_group: allow registration of const attribute
  ...
2025-12-05 21:29:02 -08:00
Linus Torvalds
b1ae17cd0f Minor IPMI fixes
Some device tree cleanups and a maintainer add.
 
 Fix a race when handling channel updates that could result in errors
 being reported to the user in some cases.
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Merge tag 'for-linus-6.19-1' of https://github.com/cminyard/linux-ipmi

Pull IPMI updates from Corey Minyard:
 "Minor IPMI fixes:

   - Some device tree cleanups and a maintainer add

   - Fix a race when handling channel updates that could result in
     errors being reported to the user in some cases"

* tag 'for-linus-6.19-1' of https://github.com/cminyard/linux-ipmi:
  MAINTAINERS: Add entry on Loongson-2K IPMI driver
  dt-bindings: ipmi: Convert aspeed,ast2400-ibt-bmc to DT schema
  dt-bindings: ipmi: Convert nuvoton,npcm750-kcs-bmc to DT schema
  ipmi: Skip channel scan if channels are already marked ready
  ipmi: Fix __scan_channels() failing to rescan channels
  ipmi: Fix the race between __scan_channels() and deliver_response()
2025-12-05 20:49:24 -08:00
Linus Torvalds
096571bb89 ata fix for 6.19-rc1
- The DELLBOSS VD SATA controller times out when sending I/Os of size
    4096 KiB or larger, even though it claims LBA48 support, which per
    the ACS standard requires support for a maximum command size of
    65535 sectors, i.e. 32 MiB - 512. Thus, quirk the device so that it
    sets a lower maximum command size (me)
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Merge tag 'ata-6.19-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux

Pull ata fix from Niklas Cassel:

 - The DELLBOSS VD SATA controller times out when sending I/Os of size
   4096 KiB or larger, even though it claims LBA48 support, which per
   the ACS standard requires support for a maximum command size of
   65535 sectors, i.e. 32 MiB - 512. Thus, quirk the device so that it
   sets a lower maximum command size (me)

* tag 'ata-6.19-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux:
  ata: libata-core: Quirk DELLBOSS VD max_sectors
  ata: libata: Move quirk flags to their own enum
2025-12-05 20:41:20 -08:00
Linus Torvalds
001eefb503 Hi,
This second pull request for 6.19 is targeted for tpm2-sessions updates.
 
 There's two bug fixes and two more cosmetic tweaks for HMAC protected
 sessions. They provide a baseine for further improvements to be
 implemented during the the course of the release cycle.
 
 BR, Jarkko
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Merge tag 'tpmdd-sessions-next-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd

Pull more tpm updates from Jarkko Sakkinen:
 "This is targeted for tpm2-sessions updates.

  There's two bug fixes and two more cosmetic tweaks for HMAC protected
  sessions. They provide a baseine for further improvements to be
  implemented during the the course of the release cycle"

* tag 'tpmdd-sessions-next-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
  tpm2-sessions: Open code tpm_buf_append_hmac_session()
  tpm2-sessions: Remove 'attributes' parameter from tpm_buf_append_auth
  tpm2-sessions: Fix tpm2_read_public range checks
  tpm2-sessions: Fix out of range indexing in name_size
2025-12-05 20:36:28 -08:00
Linus Torvalds
f19b84186d [GIT PULL for v6.19] media updates
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Merge tag 'media/v6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media kernel-doc fix from Mauro Carvalho Chehab:
 "A fix to shut up a kernel-doc warning on c3-isp driver"

* tag 'media/v6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: uapi: c3-isp: Fix documentation warning
2025-12-05 20:17:50 -08:00
Linus Torvalds
7eb7f5723d SCSI misc on 20251204
Usual driver updates (ufs, lpfc, target, qla2xxx) plus assorted
 cleanups and fixes including the WQ_PERCPU series.  The biggest core
 change is the new allocation of pseudo-devices which allow the sending
 of internal commands to a given SCSI target.
 
 Signed-off-by: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "Usual driver updates (ufs, lpfc, target, qla2xxx) plus assorted
  cleanups and fixes including the WQ_PERCPU series.

  The biggest core change is the new allocation of pseudo-devices which
  allow the sending of internal commands to a given SCSI target"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (147 commits)
  scsi: MAINTAINERS: Add the UFS include directory
  scsi: scsi_debug: Support injecting unaligned write errors
  scsi: qla2xxx: Fix improper freeing of purex item
  scsi: ufs: rockchip: Fix compile error without CONFIG_GPIOLIB
  scsi: ufs: rockchip: Reset controller on PRE_CHANGE of hce enable notify
  scsi: ufs: core: Use scsi_device_busy()
  scsi: ufs: core: Fix single doorbell mode support
  scsi: pm80xx: Add WQ_PERCPU to alloc_workqueue() users
  scsi: target: Add WQ_PERCPU to alloc_workqueue() users
  scsi: qedi: Add WQ_PERCPU to alloc_workqueue() users
  scsi: target: ibmvscsi: Add WQ_PERCPU to alloc_workqueue() users
  scsi: qedf: Add WQ_PERCPU to alloc_workqueue() users
  scsi: bnx2fc: Add WQ_PERCPU to alloc_workqueue() users
  scsi: be2iscsi: Add WQ_PERCPU to alloc_workqueue() users
  scsi: message: fusion: Add WQ_PERCPU to alloc_workqueue() users
  scsi: lpfc: WQ_PERCPU added to alloc_workqueue() users
  scsi: scsi_transport_fc: WQ_PERCPU added to alloc_workqueue users()
  scsi: scsi_dh_alua: WQ_PERCPU added to alloc_workqueue() users
  scsi: qla2xxx: WQ_PERCPU added to alloc_workqueue() users
  scsi: target: sbp: Replace use of system_unbound_wq with system_dfl_wq
  ...
2025-12-05 19:56:50 -08:00
Huacai Chen
708ed32c84 LoongArch: Adjust common macro definitions for 32BIT/64BIT
Most common macros are defined in asm.h, asmmacro.h and stackframe.h.
Adjust these macros for both 32BIT and 64BIT.

Add SETUP_TWINS (Setup Trampoline Windows) and SETUP_MODES (Setup CRMD/
PRMD/EUEN) which will be used later.

Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:40:32 +08:00
Huacai Chen
81f5d15c48 LoongArch: Add adaptive CSR accessors for 32BIT/64BIT
32BIT platforms only have 32bit CSR/IOCSR registers, 64BIT platforms
have both 32bit/64bit CSR/IOCSR registers. Now there are both 32bit and
64bit CSR accessors:

csr_read32()/csr_write32()/csr_xchg32();
csr_read64()/csr_write64()/csr_xchg64();

Some CSR registers (address and timer registers) are 32bit length on
32BIT platform and 64bit length on 64BIT platform. To avoid #ifdefs here
and there, they need adaptive accessors, so we define and use:

csr_read()/csr_write()/csr_xchg();

IOCSR doesn't have a "natural length", which means a 64bit register can
be treated as two 32bit registers, so we just use two 32bit accessors to
emulate a 64bit accessors.

Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:40:32 +08:00
Huacai Chen
79974cc3ba LoongArch: Add atomic operations for 32BIT/64BIT
LoongArch64 has both AMO and LL/SC instructions, while LoongArch32 only
has LL/SC intstructions. So we add a Kconfig option CPU_HAS_AMO here and
implement atomic operations (also including local operations and percpu
operations) for both 32BIT and 64BIT platforms.

Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:40:32 +08:00
Huacai Chen
bf3fa8f232 LoongArch: Add new PCI ID for pci_fixup_vgadev()
Loongson-2K3000 has a new PCI ID (0x7a46) for its display controller,
Add it for pci_fixup_vgadev() since we prefer a discrete graphics card
as default boot device if present.

Cc: stable@vger.kernel.org
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:39:49 +08:00
Song Gao
dbb994b44c LoongArch: Add and use some macros for AVEC
Add and use some macros for AVEC interrupt controller, instead of using
magic numbers.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:39:49 +08:00
Qiang Ma
1de0ae21f1 LoongArch: Correct the calculation logic of thread_count
For thread_count, the current calculation method has a maximum of 255,
which may not be sufficient in the future. Therefore, we are correcting
it now.

Reference: SMBIOS Specification, 7.5 Processor Information (Type 4)[1]

[1]: https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.9.0.pdf

Cc: stable@vger.kernel.org
Signed-off-by: Qiang Ma <maqianga@uniontech.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:39:49 +08:00
Tiezhu Yang
a258a3cb18 LoongArch: Use unsigned long for _end and _text
It is better to use unsigned long rather than long for _end and _text to
calculate the kernel length.

Cc: stable@vger.kernel.org # v6.3+
Fixes: e5f02b51fa ("LoongArch: Add support for kernel address space layout randomization (KASLR)")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:39:48 +08:00
Yuli Wang
4a71df151e LoongArch: Use __pmd()/__pte() for swap entry conversions
The __pmd() and __pte() helper macros provide the correct initialization
syntax and abstraction for the pmd_t and pte_t types.

Use __pmd() to fix follow warning about __swp_entry_to_pmd() with gcc-15
under specific configs [1] :

  In file included from ./include/linux/pgtable.h:6,
                   from ./include/linux/mm.h:31,
                   from ./include/linux/pagemap.h:8,
                   from arch/loongarch/mm/init.c:14:
  ./include/linux/swapops.h: In function ‘swp_entry_to_pmd’:
  ./arch/loongarch/include/asm/pgtable.h:302:34: error: missing braces around initializer [-Werror=missing-braces]
    302 | #define __swp_entry_to_pmd(x)   ((pmd_t) { (x).val | _PAGE_HUGE })
        |                                  ^
  ./include/linux/swapops.h:559:16: note: in expansion of macro ‘__swp_entry_to_pmd’
    559 |         return __swp_entry_to_pmd(arch_entry);
        |                ^~~~~~~~~~~~~~~~~~
  cc1: all warnings being treated as errors

Also update __swp_entry_to_pte() to use __pte() for consistency.

[1]. https://download.01.org/0day-ci/archive/20251119/202511190316.luI90kAo-lkp@intel.com/config

Cc: stable@vger.kernel.org
Signed-off-by: Yuli Wang <wangyl5933@chinaunicom.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:39:48 +08:00
Huacai Chen
a91b446e35 LoongArch: Fix arch_dup_task_struct() for CONFIG_RANDSTRUCT
Now the optimized version of arch_dup_task_struct() for LoongArch
assumes 'thread' is the last member of 'task_struct'. But this is
not true if CONFIG_RANDSTRUCT is enabled after Linux-6.16.

So fix the arch_dup_task_struct() function for CONFIG_RANDSTRUCT by
copying the whole 'task_struct'.

Cc: stable@vger.kernel.org   # 6.16+
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:39:48 +08:00
Huacai Chen
3c250aecef LoongArch: Fix build errors for CONFIG_RANDSTRUCT
When CONFIG_RANDSTRUCT enabled, members of task_struct are randomized.
There is a chance that TASK_STACK_CANARY be out of 12bit immediate's
range and causes build errors. TASK_STACK_CANARY is naturally aligned,
so fix it by replacing ld.d/st.d with ldptr.d/stptr.d which have 14bit
immediates.

Cc: stable@vger.kernel.org
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202511240656.0NaPcJs1-lkp@intel.com/
Suggested-by: Rui Wang <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:39:40 +08:00
Xi Ruoyao
17fcc4bd7e LoongArch: Simplify __arch_bitrev32() implementation
LoongArch has the bitrev.w instruction to reverse bits in a 32-bit
integer, thus there's no need to reverse the bytes and use bitrev.4b.

Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:39:39 +08:00
Xi Ruoyao
10eda1c51c LoongArch: Select HAVE_ARCH_BITREVERSE in Kconfig
Without HAVE_ARCH_BITREVERSE, the architecture-optimized bit reverse
implementations in arch/loongarch/include/asm/bitrev.h are not used at
all.

Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-06 10:39:39 +08:00
Mike Snitzer
3af870aedb nfs/localio: fix regression due to out-of-order __put_cred
Commit f2060bdc21 ("nfs/localio: add refcounting for each iocb IO
associated with NFS pgio header") inadvertantly reintroduced the same
potential for __put_cred() triggering BUG_ON(cred == current->cred) that
commit 992203a1fb ("nfs/localio: restore creds before releasing pageio
data") fixed.

Fix this by saving and restoring the cred around each {read,write}_iter
call within the respective for loop of nfs_local_call_{read,write} using
scoped_with_creds().

NOTE: this fix started by first reverting the following commits:

 94afb627df ("nfs: use credential guards in nfs_local_call_read()")
 bff3c841f7 ("nfs: use credential guards in nfs_local_call_write()")
 1d18101a64 ("Merge tag 'kernel-6.19-rc1.cred' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs")

followed by narrowly fixing the cred lifetime issue by using
scoped_with_creds().  In doing so, this commit's changes appear more
extensive than they really are (as evidenced by comparing to v6.18's
fs/nfs/localio.c).

Reported-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Acked-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/linux-next/20251205111942.4150b06f@canb.auug.org.au/
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2025-12-05 17:53:56 -08:00
Linus Torvalds
11efc1cb70 soc: driver updates for 6.19, part 2
These updates came a little late, or were based on a later 6.18-rc
 tag than the others:
 
  - A new driver for cache management on cxl devices with memory shared
    in a coherent cluster. This is part of the drivers/cache/ tree, but
    unlike the other drivers that back the dma-mapping interfaces, this
    one is needed only during CPU hotplug.
 
  - A shared branch for reset controllers using swnode infrastructure
 
  - Added support for new SoC variants in the Amlogic soc_device
    identification
 
  - Minor updates in Freescale, Microchip, Samsung, and Apple SoC drivers
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Merge tag 'soc-drivers-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull more SoC driver updates from Arnd Bergmann:
 "These updates came a little late, or were based on a later 6.18-rc tag
  than the others:

   - A new driver for cache management on cxl devices with memory shared
     in a coherent cluster. This is part of the drivers/cache/ tree, but
     unlike the other drivers that back the dma-mapping interfaces, this
     one is needed only during CPU hotplug.

   - A shared branch for reset controllers using swnode infrastructure

   - Added support for new SoC variants in the Amlogic soc_device
     identification

   - Minor updates in Freescale, Microchip, Samsung, and Apple SoC
     drivers"

* tag 'soc-drivers-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (24 commits)
  soc: samsung: exynos-pmu: fix device leak on regmap lookup
  soc: samsung: exynos-pmu: Fix structure initialization
  soc: fsl: qbman: use kmalloc_array() instead of kmalloc()
  soc: fsl: qbman: add WQ_PERCPU to alloc_workqueue users
  MAINTAINERS: Update email address for Christophe Leroy
  MAINTAINERS: refer to intended file in STANDALONE CACHE CONTROLLER DRIVERS
  cache: Support cache maintenance for HiSilicon SoC Hydra Home Agent
  cache: Make top level Kconfig menu a boolean dependent on RISCV
  MAINTAINERS: Add Jonathan Cameron to drivers/cache and add lib/cache_maint.c + header
  arm64: Select GENERIC_CPU_CACHE_MAINTENANCE
  lib: Support ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION
  soc: amlogic: meson-gx-socinfo: add new SoCs id
  dt-bindings: arm: amlogic: meson-gx-ao-secure: support more SoCs
  memregion: Support fine grained invalidate by cpu_cache_invalidate_memregion()
  memregion: Drop unused IORES_DESC_* parameter from cpu_cache_invalidate_memregion()
  dt-bindings: cache: sifive,ccache0: add a pic64gx compatible
  MAINTAINERS: rename Microchip RISC-V entry
  MAINTAINERS: add new soc drivers to Microchip RISC-V entry
  soc: microchip: add mfd drivers for two syscon regions on PolarFire SoC
  dt-bindings: soc: microchip: document the simple-mfd syscon on PolarFire SoC
  ...
2025-12-05 17:47:59 -08:00
Linus Torvalds
208eed95fc soc: driver updates for 6.19
This is the first half of the driver changes:
 
  - A treewide interface change to the "syscore" operations for
    power management, as a preparation for future Tegra specific
    changes.
 
  - Reset controller updates with added drivers for LAN969x, eic770
    and RZ/G3S SoCs.
 
  - Protection of system controller registers on Renesas and Google SoCs,
    to prevent trivially triggering a system crash from e.g. debugfs
    access.
 
  - soc_device identification updates on Nvidia, Exynos and Mediatek
 
  - debugfs support in the ST STM32 firewall driver
 
  - Minor updates for SoC drivers on AMD/Xilinx, Renesas,  Allwinner, TI
 
  - Cleanups for memory controller support on Nvidia and Renesas
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Merge tag 'soc-drivers-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull SoC driver updates from Arnd Bergmann:
 "This is the first half of the driver changes:

   - A treewide interface change to the "syscore" operations for power
     management, as a preparation for future Tegra specific changes

   - Reset controller updates with added drivers for LAN969x, eic770 and
     RZ/G3S SoCs

   - Protection of system controller registers on Renesas and Google
     SoCs, to prevent trivially triggering a system crash from e.g.
     debugfs access

   - soc_device identification updates on Nvidia, Exynos and Mediatek

   - debugfs support in the ST STM32 firewall driver

   - Minor updates for SoC drivers on AMD/Xilinx, Renesas, Allwinner, TI

   - Cleanups for memory controller support on Nvidia and Renesas"

* tag 'soc-drivers-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (114 commits)
  memory: tegra186-emc: Fix missing put_bpmp
  Documentation: reset: Remove reset_controller_add_lookup()
  reset: fix BIT macro reference
  reset: rzg2l-usbphy-ctrl: Fix a NULL vs IS_ERR() bug in probe
  reset: th1520: Support reset controllers in more subsystems
  reset: th1520: Prepare for supporting multiple controllers
  dt-bindings: reset: thead,th1520-reset: Add controllers for more subsys
  dt-bindings: reset: thead,th1520-reset: Remove non-VO-subsystem resets
  reset: remove legacy reset lookup code
  clk: davinci: psc: drop unused reset lookup
  reset: rzg2l-usbphy-ctrl: Add support for RZ/G3S SoC
  reset: rzg2l-usbphy-ctrl: Add support for USB PWRRDY
  dt-bindings: reset: renesas,rzg2l-usbphy-ctrl: Document RZ/G3S support
  reset: eswin: Add eic7700 reset driver
  dt-bindings: reset: eswin: Documentation for eic7700 SoC
  reset: sparx5: add LAN969x support
  dt-bindings: reset: microchip: Add LAN969x support
  soc: rockchip: grf: Add select correct PWM implementation on RK3368
  soc/tegra: pmc: Add USB wake events for Tegra234
  amba: tegra-ahb: Fix device leak on SMMU enable
  ...
2025-12-05 17:29:04 -08:00
Linus Torvalds
66a1025f7f soc: sew SoC familes for 6.19
These three new families of SoC are split out into a separate branch
 because they touch multiple parts of the source tree and are better
 left separate for the initial merge.
 
  - Black Sesame Technologies C1200 is an automotive SoC using
    Cortex-A78 CPU cores
 
  - Anlogic dr1v90 (not to be confused with Amlogic) is an FPGA
    platform using a single nuclei ux900 RISC-V core
 
  - Tenstorrent Blackhole is a Neural Processing Unit using
    custom "Tensix" cores for computation offload managed by
    Linux running on SiFive X280 RISC-V cores.
 
 Support for all three is rather rudimentary at the moment and will get
 improved as device drivers are merged through other tree.
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Merge tag 'soc-newsoc-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull new SoC families update from Arnd Bergmann:
 "These three new families of SoC are split out into a separate branch
  because they touch multiple parts of the source tree and are better
  left separate for the initial merge.

   - Black Sesame Technologies C1200 is an automotive SoC using
     Cortex-A78 CPU cores

   - Anlogic dr1v90 (not to be confused with Amlogic) is an FPGA
     platform using a single nuclei ux900 RISC-V core

   - Tenstorrent Blackhole is a Neural Processing Unit using custom
     "Tensix" cores for computation offload managed by Linux running on
     SiFive X280 RISC-V cores.

  Support for all three is rather rudimentary at the moment and will get
  improved as device drivers are merged through other tree"

* tag 'soc-newsoc-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (24 commits)
  MAINTAINERS: add Black Sesame Technologies (BST) ARM SoC support
  arm64: defconfig: enable BST platform support
  arm64: dts: bst: add support for Black Sesame Technologies C1200 CDCU1.0 board
  arm64: Kconfig: add ARCH_BST for Black Sesame Technologies SoCs
  dt-bindings: arm: add Black Sesame Technologies (bst) SoC
  dt-bindings: vendor-prefixes: Add Black Sesame Technologies Co., Ltd.
  MAINTAINERS: Setup support for Anlogic tree
  riscv: defconfig: Enable Anlogic SoC
  riscv: dts: anlogic: Add Milianke MLKPAI FS01 board
  riscv: dts: Add initial Anlogic DR1V90 SoC device tree
  riscv: Add Anlogic SoC famly Kconfig support
  dt-bindings: serial: snps-dw-apb-uart: Add Anlogic DR1V90 uart
  dt-bindings: timer: Add Anlogic DR1V90 ACLINT MTIMER
  dt-bindings: riscv: Add Anlogic DR1V90
  dt-bindings: riscv: Add Nuclei UX900 compatibles
  dt-bindings: vendor-prefixes: Add Anlogic, Milianke and Nuclei
  riscv: defconfig: Enable Tenstorrent SoCs
  riscv: Kconfig.socs: Add ARCH_TENSTORRENT for Tenstorrent SoCs
  riscv: dts: Add Tenstorrent Blackhole SoC PCIe cards
  dt-bindings: interrupt-controller: Add Tenstorrent Blackhole compatible
  ...
2025-12-05 17:27:12 -08:00
Linus Torvalds
0cac5ce06e soc: devicetree updates for 6.19
Three new SoCs got added in existing arm64 chip families:
 
  - Renesas R-Car X5H (R8A78000) is a new generation of automotive SoCs,
    based on 16 Cortex-A720 (Armv9.2) cores, which makes the the currently
    highest-perforance embedded SoC.
 
  - TI AM62L is a new variant of the AM62 family of industrial SoCs, this
    one comes without a GPU.
 
  - Qualcomm MSM8937 (Snapdragon 430) is an older mobile phone chip based
    on Cortex-A53, and closely related to MSM8917 (Snapdragn 425), which we
    already support.
 
 In addition, there are a good number of newly supported machines
 across SoC families:
 
  - Two Aspeed AST2600 (Cortex-A7) based BMC setups for large servers
 
  - Mobile Phones and tables based on Mediatek MT6582, Nvidia Tegra124,
    Qualcomm MSM8937 and Qualcomm MSM8939,
 
  - Two Laptops based on Qualcomm SoCs: one using the older sdm850, the
    other using x1p42100.
 
  - One Router based on Rockchips RK3568
 
  - 24 variants of the Enclustra Mercury system-on-module, all based on
    32-bit Intel/Altera SocFPGA chips, plus two boards using 64-bit
    SocFPGA Agilex chips..
 
  - 30 industrial/embedded boards and single-board computers, using
    various chips from NXP, Rockchips, Mediatek, TI, Amlogic, Qualcomm,
    Spacemit, and Starfive.
 
 In total there are 783 commits here, the majority of these improving
 hardware support and cleaning up devicetree files across the tree, with
 the majority of the changes going into the Qualcomm, NXP, Renesas and
 Rockchips platforms.
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Merge tag 'soc-dt-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull SoC devicetree updates from Arnd Bergmann:
 "Three new SoCs got added in existing arm64 chip families:

   - Renesas R-Car X5H (R8A78000) is a new generation of automotive
     SoCs, based on 16 Cortex-A720 (Armv9.2) cores, which makes the the
     currently highest-perforance embedded SoC.

   - TI AM62L is a new variant of the AM62 family of industrial SoCs,
     this one comes without a GPU.

   - Qualcomm MSM8937 (Snapdragon 430) is an older mobile phone chip
     based on Cortex-A53, and closely related to MSM8917 (Snapdragn
     425), which we already support.

  In addition, there are a good number of newly supported machines
  across SoC families:

   - Two Aspeed AST2600 (Cortex-A7) based BMC setups for large servers

   - Mobile Phones and tables based on Mediatek MT6582, Nvidia Tegra124,
     Qualcomm MSM8937 and Qualcomm MSM8939,

   - Two Laptops based on Qualcomm SoCs: one using the older sdm850, the
     other using x1p42100.

   - One Router based on Rockchips RK3568

   - 24 variants of the Enclustra Mercury system-on-module, all based on
     32-bit Intel/Altera SocFPGA chips, plus two boards using 64-bit
     SocFPGA Agilex chips..

   - 30 industrial/embedded boards and single-board computers, using
     various chips from NXP, Rockchips, Mediatek, TI, Amlogic, Qualcomm,
     Spacemit, and Starfive.

  In total there are 783 commits here, the majority of these improving
  hardware support and cleaning up devicetree files across the tree,
  with the majority of the changes going into the Qualcomm, NXP, Renesas
  and Rockchips platforms"

* tag 'soc-dt-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (782 commits)
  arm64: dts: mediatek: mt8195: Fix address range for JPEG decoder core 1
  ARM: dts: samsung: exynos4412-midas: turn off SDIO WLAN chip during system suspend
  ARM: dts: samsung: exynos4210-trats: turn off SDIO WLAN chip during system suspend
  ARM: dts: samsung: exynos4210-i9100: turn off SDIO WLAN chip during system suspend
  ARM: dts: samsung: universal_c210: turn off SDIO WLAN chip during system suspend
  arm64: dts: amlogic: meson-g12b: Fix L2 cache reference for S922X CPUs
  arm64: dts: Add gpio_intc node for Amlogic S7D SoCs
  arm64: dts: Add gpio_intc node for Amlogic S7 SoCs
  arm64: dts: Add gpio_intc node for Amlogic S6 SoCs
  arm64: dts: amlogic: s7d: add ao secure node
  arm64: dts: amlogic: s7: add ao secure node
  arm64: dts: amlogic: s6: add ao secure node
  arm64: dts: amlogic: Fix the register name of the 'DBI' region
  dts: arm64: amlogic: add a5 pinctrl node
  arm64: dts: amlogic: s7d: add power domain controller node
  arm64: dts: amlogic: s7: add power domain controller node
  arm64: dts: amlogic: s6: add power domain controller node
  dts: arm64: amlogic: Add ISP related nodes for C3
  arm64: dts: meson: add initial device-tree for Tanix TX9 Pro
  dt-bindings: arm: amlogic: add support for Tanix TX9 Pro
  ...
2025-12-05 17:24:29 -08:00
Linus Torvalds
09cab48db9 soc: arm code changes for 6.19
These are very minimal changes for 32-bit Arm platform code, enabling
 SMP bringup for one more SoC variant (mt6582) among spelling changes
 and a build warning fix.
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Merge tag 'soc-arm-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull SoC ARM code updates from Arnd Bergmann:
 "These are very minimal changes for 32-bit Arm platform code, enabling
  SMP bringup for one more SoC variant (mt6582) among spelling changes
  and a build warning fix"

* tag 'soc-arm-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: omap1: avoid symbol clashes in fiq handler
  ARM: gemini: fix typos in comments
  ARM: versatile: Fix typo in versatile.c
  ARM: OMAP2+: Fix falg->flag typo in omap_smc2()
  ARM: mediatek: add MT6582 smp bring up code
  ARM: mediatek: add board_dt_compat entry for the MT6582 SoC
2025-12-05 17:23:12 -08:00
Linus Torvalds
b4c6c76e40 soc: defconfig for 6.19
As usual, a number of newly added drivers get enabled in the arm64 defconfig,
 in addition to minor housekeeping work on defconfig files for arm32, arm64 and
 riscv.
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Merge tag 'soc-defconfig-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull SoC defconfig updates from Arnd Bergmann:
 "As usual, a number of newly added drivers get enabled in the arm64
  defconfig, in addition to minor housekeeping work on defconfig files
  for arm32, arm64 and riscv"

* tag 'soc-defconfig-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (24 commits)
  arm64: defconfig: enable Exynos ACPM clocks
  arm64: defconfig: Remove the redundant SCHED_MC/SCHED_SMT
  ARM: multi_v7_defconfig: Enable TI PRU Ethernet driver
  arm64: defconfig: enable i.MX AIPSTZ driver
  ARM: mxs_defconfig: enable sound drivers for imx28-amarula-rmm
  arm64: defconfig: Enable i.MX95 drivers for pinctrl, Ethernet and PCIe
  arm64: defconfig: enable rockchip camera interface
  ARM: tegra: Enable EXT4 for Tegra
  arm64: defconfig: Enable NVIDIA VRS PSEQ RTC
  arm64: defconfig: Enable SX150x GPIO expander driver
  riscv: defconfig: enable SPI_FSL_QUADSPI as a module
  ARM: at91: at91_dt_defconfig: set MMC_SPI to module
  arm64: defconfig: Build NSS clock controller driver for IPQ5424
  arm64: defconfig: Enable SCSI UFS Crypto and Block Inline encryption drivers
  arm64: defconfig: Add M31 eUSB2 PHY config
  arm64: defconfig: Enable configs for Fairphone 3, 4, 5 smartphones
  arm64: defconfig: Enable two Novatek display panels for MTP8750 and Tianma
  arm64: defconfig: Enable RZ/T2H / RZ/N2H ADC driver
  ARM: shmobile: defconfig: Refresh for v6.18-rc1
  arm64: defconfig: Enable DW HDMI QP CEC support
  ...
2025-12-05 17:22:09 -08:00
Linus Torvalds
51d90a15fe ARM:
- Support for userspace handling of synchronous external aborts (SEAs),
   allowing the VMM to potentially handle the abort in a non-fatal
   manner.
 
 - Large rework of the VGIC's list register handling with the goal of
   supporting more active/pending IRQs than available list registers in
   hardware. In addition, the VGIC now supports EOImode==1 style
   deactivations for IRQs which may occur on a separate vCPU than the
   one that acked the IRQ.
 
 - Support for FEAT_XNX (user / privileged execute permissions) and
   FEAT_HAF (hardware update to the Access Flag) in the software page
   table walkers and shadow MMU.
 
 - Allow page table destruction to reschedule, fixing long need_resched
   latencies observed when destroying a large VM.
 
 - Minor fixes to KVM and selftests
 
 Loongarch:
 
 - Get VM PMU capability from HW GCFG register.
 
 - Add AVEC basic support.
 
 - Use 64-bit register definition for EIOINTC.
 
 - Add KVM timer test cases for tools/selftests.
 
 RISC/V:
 
 - SBI message passing (MPXY) support for KVM guest
 
 - Give a new, more specific error subcode for the case when in-kernel
   AIA virtualization fails to allocate IMSIC VS-file
 
 - Support KVM_DIRTY_LOG_INITIALLY_SET, enabling dirty log gradually
   in small chunks
 
 - Fix guest page fault within HLV* instructions
 
 - Flush VS-stage TLB after VCPU migration for Andes cores
 
 s390:
 
 - Always allocate ESCA (Extended System Control Area), instead of
   starting with the basic SCA and converting to ESCA with the
   addition of the 65th vCPU.  The price is increased number of
   exits (and worse performance) on z10 and earlier processor;
   ESCA was introduced by z114/z196 in 2010.
 
 - VIRT_XFER_TO_GUEST_WORK support
 
 - Operation exception forwarding support
 
 - Cleanups
 
 x86:
 
 - Skip the costly "zap all SPTEs" on an MMIO generation wrap if MMIO SPTE
   caching is disabled, as there can't be any relevant SPTEs to zap.
 
 - Relocate a misplaced export.
 
 - Fix an async #PF bug where KVM would clear the completion queue when the
   guest transitioned in and out of paging mode, e.g. when handling an SMI and
   then returning to paged mode via RSM.
 
 - Leave KVM's user-return notifier registered even when disabling
   virtualization, as long as kvm.ko is loaded.  On reboot/shutdown, keeping
   the notifier registered is ok; the kernel does not use the MSRs and the
   callback will run cleanly and restore host MSRs if the CPU manages to
   return to userspace before the system goes down.
 
 - Use the checked version of {get,put}_user().
 
 - Fix a long-lurking bug where KVM's lack of catch-up logic for periodic APIC
   timers can result in a hard lockup in the host.
 
 - Revert the periodic kvmclock sync logic now that KVM doesn't use a
   clocksource that's subject to NTP corrections.
 
 - Clean up KVM's handling of MMIO Stale Data and L1TF, and bury the latter
   behind CONFIG_CPU_MITIGATIONS.
 
 - Context switch XCR0, XSS, and PKRU outside of the entry/exit fast path;
   the only reason they were handled in the fast path was to paper of a bug
   in the core #MC code, and that has long since been fixed.
 
 - Add emulator support for AVX MOV instructions, to play nice with emulated
   devices whose guest drivers like to access PCI BARs with large multi-byte
   instructions.
 
 x86 (AMD):
 
 - Fix a few missing "VMCB dirty" bugs.
 
 - Fix the worst of KVM's lack of EFER.LMSLE emulation.
 
 - Add AVIC support for addressing 4k vCPUs in x2AVIC mode.
 
 - Fix incorrect handling of selective CR0 writes when checking intercepts
   during emulation of L2 instructions.
 
 - Fix a currently-benign bug where KVM would clobber SPEC_CTRL[63:32] on
   VMRUN and #VMEXIT.
 
 - Fix a bug where KVM corrupt the guest code stream when re-injecting a soft
   interrupt if the guest patched the underlying code after the VM-Exit, e.g.
   when Linux patches code with a temporary INT3.
 
 - Add KVM_X86_SNP_POLICY_BITS to advertise supported SNP policy bits to
   userspace, and extend KVM "support" to all policy bits that don't require
   any actual support from KVM.
 
 x86 (Intel):
 
 - Use the root role from kvm_mmu_page to construct EPTPs instead of the
   current vCPU state, partly as worthwhile cleanup, but mostly to pave the
   way for tracking per-root TLB flushes, and elide EPT flushes on pCPU
   migration if the root is clean from a previous flush.
 
 - Add a few missing nested consistency checks.
 
 - Rip out support for doing "early" consistency checks via hardware as the
   functionality hasn't been used in years and is no longer useful in general;
   replace it with an off-by-default module param to WARN if hardware fails
   a check that KVM does not perform.
 
 - Fix a currently-benign bug where KVM would drop the guest's SPEC_CTRL[63:32]
   on VM-Enter.
 
 - Misc cleanups.
 
 - Overhaul the TDX code to address systemic races where KVM (acting on behalf
   of userspace) could inadvertantly trigger lock contention in the TDX-Module;
   KVM was either working around these in weird, ugly ways, or was simply
   oblivious to them (though even Yan's devilish selftests could only break
   individual VMs, not the host kernel)
 
 - Fix a bug where KVM could corrupt a vCPU's cpu_list when freeing a TDX vCPU,
   if creating said vCPU failed partway through.
 
 - Fix a few sparse warnings (bad annotation, 0 != NULL).
 
 - Use struct_size() to simplify copying TDX capabilities to userspace.
 
 - Fix a bug where TDX would effectively corrupt user-return MSR values if the
   TDX Module rejects VP.ENTER and thus doesn't clobber host MSRs as expected.
 
 Selftests:
 
 - Fix a math goof in mmu_stress_test when running on a single-CPU system/VM.
 
 - Forcefully override ARCH from x86_64 to x86 to play nice with specifying
   ARCH=x86_64 on the command line.
 
 - Extend a bunch of nested VMX to validate nested SVM as well.
 
 - Add support for LA57 in the core VM_MODE_xxx macro, and add a test to
   verify KVM can save/restore nested VMX state when L1 is using 5-level
   paging, but L2 is not.
 
 - Clean up the guest paging code in anticipation of sharing the core logic for
   nested EPT and nested NPT.
 
 guest_memfd:
 
 - Add NUMA mempolicy support for guest_memfd, and clean up a variety of
   rough edges in guest_memfd along the way.
 
 - Define a CLASS to automatically handle get+put when grabbing a guest_memfd
   from a memslot to make it harder to leak references.
 
 - Enhance KVM selftests to make it easer to develop and debug selftests like
   those added for guest_memfd NUMA support, e.g. where test and/or KVM bugs
   often result in hard-to-debug SIGBUS errors.
 
 - Misc cleanups.
 
 Generic:
 
 - Use the recently-added WQ_PERCPU when creating the per-CPU workqueue for
   irqfd cleanup.
 
 - Fix a goof in the dirty ring documentation.
 
 - Fix choice of target for directed yield across different calls to
   kvm_vcpu_on_spin(); the function was always starting from the first
   vCPU instead of continuing the round-robin search.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Paolo Bonzini:
 "ARM:

   - Support for userspace handling of synchronous external aborts
     (SEAs), allowing the VMM to potentially handle the abort in a
     non-fatal manner

   - Large rework of the VGIC's list register handling with the goal of
     supporting more active/pending IRQs than available list registers
     in hardware. In addition, the VGIC now supports EOImode==1 style
     deactivations for IRQs which may occur on a separate vCPU than the
     one that acked the IRQ

   - Support for FEAT_XNX (user / privileged execute permissions) and
     FEAT_HAF (hardware update to the Access Flag) in the software page
     table walkers and shadow MMU

   - Allow page table destruction to reschedule, fixing long
     need_resched latencies observed when destroying a large VM

   - Minor fixes to KVM and selftests

  Loongarch:

   - Get VM PMU capability from HW GCFG register

   - Add AVEC basic support

   - Use 64-bit register definition for EIOINTC

   - Add KVM timer test cases for tools/selftests

  RISC/V:

   - SBI message passing (MPXY) support for KVM guest

   - Give a new, more specific error subcode for the case when in-kernel
     AIA virtualization fails to allocate IMSIC VS-file

   - Support KVM_DIRTY_LOG_INITIALLY_SET, enabling dirty log gradually
     in small chunks

   - Fix guest page fault within HLV* instructions

   - Flush VS-stage TLB after VCPU migration for Andes cores

  s390:

   - Always allocate ESCA (Extended System Control Area), instead of
     starting with the basic SCA and converting to ESCA with the
     addition of the 65th vCPU. The price is increased number of exits
     (and worse performance) on z10 and earlier processor; ESCA was
     introduced by z114/z196 in 2010

   - VIRT_XFER_TO_GUEST_WORK support

   - Operation exception forwarding support

   - Cleanups

  x86:

   - Skip the costly "zap all SPTEs" on an MMIO generation wrap if MMIO
     SPTE caching is disabled, as there can't be any relevant SPTEs to
     zap

   - Relocate a misplaced export

   - Fix an async #PF bug where KVM would clear the completion queue
     when the guest transitioned in and out of paging mode, e.g. when
     handling an SMI and then returning to paged mode via RSM

   - Leave KVM's user-return notifier registered even when disabling
     virtualization, as long as kvm.ko is loaded. On reboot/shutdown,
     keeping the notifier registered is ok; the kernel does not use the
     MSRs and the callback will run cleanly and restore host MSRs if the
     CPU manages to return to userspace before the system goes down

   - Use the checked version of {get,put}_user()

   - Fix a long-lurking bug where KVM's lack of catch-up logic for
     periodic APIC timers can result in a hard lockup in the host

   - Revert the periodic kvmclock sync logic now that KVM doesn't use a
     clocksource that's subject to NTP corrections

   - Clean up KVM's handling of MMIO Stale Data and L1TF, and bury the
     latter behind CONFIG_CPU_MITIGATIONS

   - Context switch XCR0, XSS, and PKRU outside of the entry/exit fast
     path; the only reason they were handled in the fast path was to
     paper of a bug in the core #MC code, and that has long since been
     fixed

   - Add emulator support for AVX MOV instructions, to play nice with
     emulated devices whose guest drivers like to access PCI BARs with
     large multi-byte instructions

  x86 (AMD):

   - Fix a few missing "VMCB dirty" bugs

   - Fix the worst of KVM's lack of EFER.LMSLE emulation

   - Add AVIC support for addressing 4k vCPUs in x2AVIC mode

   - Fix incorrect handling of selective CR0 writes when checking
     intercepts during emulation of L2 instructions

   - Fix a currently-benign bug where KVM would clobber SPEC_CTRL[63:32]
     on VMRUN and #VMEXIT

   - Fix a bug where KVM corrupt the guest code stream when re-injecting
     a soft interrupt if the guest patched the underlying code after the
     VM-Exit, e.g. when Linux patches code with a temporary INT3

   - Add KVM_X86_SNP_POLICY_BITS to advertise supported SNP policy bits
     to userspace, and extend KVM "support" to all policy bits that
     don't require any actual support from KVM

  x86 (Intel):

   - Use the root role from kvm_mmu_page to construct EPTPs instead of
     the current vCPU state, partly as worthwhile cleanup, but mostly to
     pave the way for tracking per-root TLB flushes, and elide EPT
     flushes on pCPU migration if the root is clean from a previous
     flush

   - Add a few missing nested consistency checks

   - Rip out support for doing "early" consistency checks via hardware
     as the functionality hasn't been used in years and is no longer
     useful in general; replace it with an off-by-default module param
     to WARN if hardware fails a check that KVM does not perform

   - Fix a currently-benign bug where KVM would drop the guest's
     SPEC_CTRL[63:32] on VM-Enter

   - Misc cleanups

   - Overhaul the TDX code to address systemic races where KVM (acting
     on behalf of userspace) could inadvertantly trigger lock contention
     in the TDX-Module; KVM was either working around these in weird,
     ugly ways, or was simply oblivious to them (though even Yan's
     devilish selftests could only break individual VMs, not the host
     kernel)

   - Fix a bug where KVM could corrupt a vCPU's cpu_list when freeing a
     TDX vCPU, if creating said vCPU failed partway through

   - Fix a few sparse warnings (bad annotation, 0 != NULL)

   - Use struct_size() to simplify copying TDX capabilities to userspace

   - Fix a bug where TDX would effectively corrupt user-return MSR
     values if the TDX Module rejects VP.ENTER and thus doesn't clobber
     host MSRs as expected

  Selftests:

   - Fix a math goof in mmu_stress_test when running on a single-CPU
     system/VM

   - Forcefully override ARCH from x86_64 to x86 to play nice with
     specifying ARCH=x86_64 on the command line

   - Extend a bunch of nested VMX to validate nested SVM as well

   - Add support for LA57 in the core VM_MODE_xxx macro, and add a test
     to verify KVM can save/restore nested VMX state when L1 is using
     5-level paging, but L2 is not

   - Clean up the guest paging code in anticipation of sharing the core
     logic for nested EPT and nested NPT

  guest_memfd:

   - Add NUMA mempolicy support for guest_memfd, and clean up a variety
     of rough edges in guest_memfd along the way

   - Define a CLASS to automatically handle get+put when grabbing a
     guest_memfd from a memslot to make it harder to leak references

   - Enhance KVM selftests to make it easer to develop and debug
     selftests like those added for guest_memfd NUMA support, e.g. where
     test and/or KVM bugs often result in hard-to-debug SIGBUS errors

   - Misc cleanups

  Generic:

   - Use the recently-added WQ_PERCPU when creating the per-CPU
     workqueue for irqfd cleanup

   - Fix a goof in the dirty ring documentation

   - Fix choice of target for directed yield across different calls to
     kvm_vcpu_on_spin(); the function was always starting from the first
     vCPU instead of continuing the round-robin search"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (260 commits)
  KVM: arm64: at: Update AF on software walk only if VM has FEAT_HAFDBS
  KVM: arm64: at: Use correct HA bit in TCR_EL2 when regime is EL2
  KVM: arm64: Document KVM_PGTABLE_PROT_{UX,PX}
  KVM: arm64: Fix spelling mistake "Unexpeced" -> "Unexpected"
  KVM: arm64: Add break to default case in kvm_pgtable_stage2_pte_prot()
  KVM: arm64: Add endian casting to kvm_swap_s[12]_desc()
  KVM: arm64: Fix compilation when CONFIG_ARM64_USE_LSE_ATOMICS=n
  KVM: arm64: selftests: Add test for AT emulation
  KVM: arm64: nv: Expose hardware access flag management to NV guests
  KVM: arm64: nv: Implement HW access flag management in stage-2 SW PTW
  KVM: arm64: Implement HW access flag management in stage-1 SW PTW
  KVM: arm64: Propagate PTW errors up to AT emulation
  KVM: arm64: Add helper for swapping guest descriptor
  KVM: arm64: nv: Use pgtable definitions in stage-2 walk
  KVM: arm64: Handle endianness in read helper for emulated PTW
  KVM: arm64: nv: Stop passing vCPU through void ptr in S2 PTW
  KVM: arm64: Call helper for reading descriptors directly
  KVM: arm64: nv: Advertise support for FEAT_XNX
  KVM: arm64: Teach ptdump about FEAT_XNX permissions
  KVM: s390: Use generic VIRT_XFER_TO_GUEST_WORK functions
  ...
2025-12-05 17:01:20 -08:00
Trond Myklebust
bd3b04b46c NFSv4: Handle NFS4ERR_NOTSUPP errors for directory delegations
The error NFS4ERR_NOTSUPP will be returned for operations that are
legal, but not supported by the server.

Fixes: 156b094829 ("NFS: Request a directory delegation on ACCESS, CREATE, and UNLINK")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2025-12-05 19:34:29 -05:00
Mike Snitzer
0b873de2c0 nfs/localio: remove 61 byte hole from needless ____cacheline_aligned
struct nfs_local_kiocb used ____cacheline_aligned on its iters[] array
and as the structure evolved it caused a 61 byte hole to form.  Fix
this by removing ____cacheline_aligned and reordering iters[] before
iter_is_dio_aligned[].

Fixes: 6a218b9c31 ("nfs/localio: do not issue misaligned DIO out-of-order")
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2025-12-05 19:34:29 -05:00
Mike Snitzer
f50d0328d0 nfs/localio: remove alignment size checking in nfs_is_local_dio_possible
This check to ensure dio_offset_align isn't larger than PAGE_SIZE is
no longer relevant (older iterations of NFS Direct was allocating
misaligned head and tail pages but no longer does, so this check isn't
needed).

Fixes: c817248fc8 ("nfs/localio: add proper O_DIRECT support for READ and WRITE")
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2025-12-05 19:34:29 -05:00
Linus Torvalds
399ead3a6d Apart from the usual small churn, we have
- initial SMP support (only kernel)
 
  - major vDSO cleanups (and fixes for 32-bit)
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Merge tag 'uml-for-linux-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux

Pull UML updates from Johannes Berg:
 "Apart from the usual small churn, we have

   - initial SMP support (only kernel)

   - major vDSO cleanups (and fixes for 32-bit)"

* tag 'uml-for-linux-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: (33 commits)
  um: Disable KASAN_INLINE when STATIC_LINK is selected
  um: Don't rename vmap to kernel_vmap
  um: drivers: virtio: use string choices helper
  um: Always set up AT_HWCAP and AT_PLATFORM
  x86/um: Remove FIXADDR_USER_START and FIXADDR_USE_END
  um: Remove __access_ok_vsyscall()
  um: Remove redundant range check from __access_ok_vsyscall()
  um: Remove fixaddr_user_init()
  x86/um: Drop gate area handling
  x86/um: Do not inherit vDSO from host
  um: Split out default elf_aux_hwcap
  x86/um: Move ELF_PLATFORM fallback to x86-specific code
  um: Split out default elf_aux_platform
  um: Avoid circular dependency on asm-offsets in pgtable.h
  um: Enable SMP support on x86
  asm-generic: percpu: Add assembly guard
  um: vdso: Remove getcpu support on x86
  um: Add initial SMP support
  um: Define timers on a per-CPU basis
  um: Determine sleep based on need_resched()
  ...
2025-12-05 16:30:56 -08:00
Linus Torvalds
07025b51c1 First set of RISC-V updates for v6.19-rc1
- Enable parallel hotplug for RISC-V
 
 - Optimize vector regset allocation for ptrace()
 
 - Add a kernel selftest for the vector ptrace interface
 
 - Enable the userspace RAID6 test to build and run using RISC-V
   vectors
 
 - Add initial support for the Zalasr RISC-V ratified ISA extension
 
 - For the Zicbop RISC-V ratified ISA extension to userspace, expose
   hardware and kernel support to userspace and add a kselftest for
   Zicbop
 
 - Convert open-coded instances of 'asm goto's that are controlled by
   runtime ALTERNATIVEs to use riscv_has_extension_{un,}likely(),
   following arm64's alternative_has_cap_{un,}likely()
 
 - Remove an unnecessary mask in the GFP flags used in some calls to
   pagetable_alloc()
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Merge tag 'riscv-for-linus-6.19-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V updates from Paul Walmsley:

 - Enable parallel hotplug for RISC-V

 - Optimize vector regset allocation for ptrace()

 - Add a kernel selftest for the vector ptrace interface

 - Enable the userspace RAID6 test to build and run using RISC-V vectors

 - Add initial support for the Zalasr RISC-V ratified ISA extension

 - For the Zicbop RISC-V ratified ISA extension to userspace, expose
   hardware and kernel support to userspace and add a kselftest for
   Zicbop

 - Convert open-coded instances of 'asm goto's that are controlled by
   runtime ALTERNATIVEs to use riscv_has_extension_{un,}likely(),
   following arm64's alternative_has_cap_{un,}likely()

 - Remove an unnecessary mask in the GFP flags used in some calls to
   pagetable_alloc()

* tag 'riscv-for-linus-6.19-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  selftests/riscv: Add Zicbop prefetch test
  riscv: hwprobe: Expose Zicbop extension and its block size
  riscv: Introduce Zalasr instructions
  riscv: hwprobe: Export Zalasr extension
  dt-bindings: riscv: Add Zalasr ISA extension description
  riscv: Add ISA extension parsing for Zalasr
  selftests: riscv: Add test for the Vector ptrace interface
  riscv: ptrace: Optimize the allocation of vector regset
  raid6: test: Add support for RISC-V
  raid6: riscv: Allow code to be compiled in userspace
  raid6: riscv: Prevent compiler from breaking inline vector assembly code
  riscv: cmpxchg: Use riscv_has_extension_likely
  riscv: bitops: Use riscv_has_extension_likely
  riscv: hweight: Use riscv_has_extension_likely
  riscv: checksum: Use riscv_has_extension_likely
  riscv: pgtable: Use riscv_has_extension_unlikely
  riscv: Remove __GFP_HIGHMEM masking
  RISC-V: Enable HOTPLUG_PARALLEL for secondary CPUs
2025-12-05 16:26:57 -08:00
Linus Torvalds
ad952db4a8 powerpc updates for 6.19
- Restore clearing of MSR[RI] at interrupt/syscall exit on 32-bit.
 
  - Fix unpaired stwcx on interrupt exit on 32-bit.
 
  - Fix race condition leading to double list-add in mac_hid_toggle_emumouse().
 
  - Fix mprotect on book3s 32-bit.
 
  - Fix SLB multihit issue during SLB preload with 64-bit hash MMU.
 
  - Add support for crashkernel CMA reservation.
 
  - Add die_id and die_cpumask for Power10 & later to expose chip hemispheres.
 
  - A series of minor fixes and improvements to the hash SLB code.
 
 Thanks to: Antonio Alvarez Feijoo, Ben Collins, Bhaskar Chowdhury, Christophe
 Leroy, Daniel Thompson, Dave Vasilevsky, Donet Tom, J. Neuschäfer, Kunwu Chan,
 Long Li, Naresh Kamboju, Nathan Chancellor, Ritesh Harjani (IBM), Shirisha G,
 Shrikanth Hegde, Sourabh Jain, Srikar Dronamraju, Stephen Rothwell, Thomas
 Zimmermann, Venkat Rao Bagalkote, Vishal Chourasia.
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Merge tag 'powerpc-6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Restore clearing of MSR[RI] at interrupt/syscall exit on 32-bit

 - Fix unpaired stwcx on interrupt exit on 32-bit

 - Fix race condition leading to double list-add in
   mac_hid_toggle_emumouse()

 - Fix mprotect on book3s 32-bit

 - Fix SLB multihit issue during SLB preload with 64-bit hash MMU

 - Add support for crashkernel CMA reservation

 - Add die_id and die_cpumask for Power10 & later to expose chip
   hemispheres

 - A series of minor fixes and improvements to the hash SLB code

Thanks to Antonio Alvarez Feijoo, Ben Collins, Bhaskar Chowdhury,
Christophe Leroy, Daniel Thompson, Dave Vasilevsky, Donet Tom,
J. Neuschäfer, Kunwu Chan, Long Li, Naresh Kamboju, Nathan Chancellor,
Ritesh Harjani (IBM), Shirisha G, Shrikanth Hegde, Sourabh Jain, Srikar
Dronamraju, Stephen Rothwell, Thomas Zimmermann, Venkat Rao Bagalkote,
and Vishal Chourasia.

* tag 'powerpc-6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (32 commits)
  macintosh/via-pmu-backlight: Include <linux/fb.h> and <linux/of.h>
  powerpc/powermac: backlight: Include <linux/of.h>
  powerpc/64s/slb: Add no_slb_preload early cmdline param
  powerpc/64s/slb: Make preload_add return type as void
  powerpc/ptdump: Dump PXX level info for kernel_page_tables
  powerpc/64s/pgtable: Enable directMap counters in meminfo for Hash
  powerpc/64s/hash: Update directMap page counters for Hash
  powerpc/64s/hash: Hash hpt_order should be only available with Hash MMU
  powerpc/64s/hash: Improve hash mmu printk messages
  powerpc/64s/hash: Fix phys_addr_t printf format in htab_initialize()
  powerpc/64s/ptdump: Fix kernel_hash_pagetable dump for ISA v3.00 HPTE format
  powerpc/64s/hash: Restrict stress_hpt_struct memblock region to within RMA limit
  powerpc/64s/slb: Fix SLB multihit issue during SLB preload
  powerpc, mm: Fix mprotect on book3s 32-bit
  powerpc/smp: Expose die_id and die_cpumask
  powerpc/83xx: Add a null pointer check to mcu_gpiochip_add
  arch:powerpc:tools This file was missing shebang line, so added it
  kexec: Include kernel-end even without crashkernel
  powerpc: p2020: Rename wdt@ nodes to watchdog@
  powerpc: 86xx: Rename wdt@ nodes to watchdog@
  ...
2025-12-05 16:18:21 -08:00
Christian Brauner
87c9e88ac4 ovl: pass original credentials, not mounter credentials during create
When creating new files the security layer expects the original
credentials to be passed.  When cleaning up the code this was accidently
changed to pass the mounter's credentials by relying on current->cred
which is already overriden at this point.  Pass the original credentials
directly.

Reported-by: Ondrej Mosnacek <omosnace@redhat.com>
Reported-by: Paul Moore <paul@paul-moore.com>
Fixes: e566bff963 ("ovl: port ovl_create_or_link() to new ovl_override_creator_creds")
Link: https://lore.kernel.org/CAFqZXNvL1ciLXMhHrnoyBmQu1PAApH41LkSWEhrcvzAAbFij8Q@mail.gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
Tested-by: Ondrej Mosnacek <omosnace@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2025-12-05 16:16:20 -08:00
David Howells
9146c7e53f cifs: Remove dead function prototypes
Remove a bunch of dead function prototypes.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-cifs@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-12-05 17:54:09 -06:00
Linus Torvalds
4b9d25b4d3 vfs-6.19-rc1.fixes
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Merge tag 'vfs-6.19-rc1.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs fixes from Christian Brauner:

 - Fix a type conversion bug in the ipc subsystem

 - Fix per-dentry timeout warning in autofs

 - Drop the fd conversion from sockets

 - Move assert from iput_not_last() to iput()

 - Fix reversed check in filesystems_freeze_callback()

 - Use proper uapi types for new struct delegation definitions

* tag 'vfs-6.19-rc1.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  vfs: use UAPI types for new struct delegation definition
  mqueue: correct the type of ro to int
  Revert "net/socket: convert sock_map_fd() to FD_ADD()"
  autofs: fix per-dentry timeout warning
  fs: assert on I_FREEING not being set in iput() and iput_not_last()
  fs: PM: Fix reverse check in filesystems_freeze_callback()
2025-12-05 15:52:30 -08:00
Linus Torvalds
e40e023591 Description for this pull request:
- Fix a remount failure caused by differing process masks by inheriting
    the original mount options during the remount process.
  - Fix a potential divide-by-zero error and system crash in
    exfat_allocate_bitmap that occurred when the readahead count was zero.
  - Add validation for directory cluster bitmap bits to prevent directory
    and root cluster from being incorrectly zeroed out on corrupted images.
  - Clear the post-EOF page cache when extending a file to prevent stale
    mmap data from becoming visible, addressing an generic/363 failure.
  - Fix a reference count leak in exfat_find by properly releasing
    the dentry set in specific error paths.
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Merge tag 'exfat-for-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat

Pull exfat updates from Namjae Jeon:

 - Fix a remount failure caused by differing process masks by inheriting
   the original mount options during the remount process

 - Fix a potential divide-by-zero error and system crash in
   exfat_allocate_bitmap that occurred when the readahead count was zero

 - Add validation for directory cluster bitmap bits to prevent directory
   and root cluster from being incorrectly zeroed out on corrupted
   images

 - Clear the post-EOF page cache when extending a file to prevent stale
   mmap data from becoming visible, addressing an generic/363 failure

 - Fix a reference count leak in exfat_find by properly releasing the
   dentry set in specific error paths

* tag 'exfat-for-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat:
  exfat: fix remount failure in different process environments
  exfat: fix divide-by-zero in exfat_allocate_bitmap
  exfat: validate the cluster bitmap bits of directory
  exfat: zero out post-EOF page cache on file extension
  exfat: fix refcount leak in exfat_find
2025-12-05 15:48:09 -08:00
ChenXiaoSong
d159702c94 smb/client: add two elements to smb2_error_map_table array
Both status codes are mapped to -EIO.

Now all status codes from common/smb2status.h are included in the
smb2_error_map_table array(except for the first two zero definitions).

Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-12-05 17:46:41 -06:00
ChenXiaoSong
523ecd9766 smb: rename to STATUS_SMB_NO_PREAUTH_INTEGRITY_HASH_OVERLAP
See MS-SMB2 3.3.5.4. To keep the name consistent with the documentation.

Additionally, move STATUS_INVALID_LOCK_RANGE to correct position in order.

Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-12-05 17:46:41 -06:00
ChenXiaoSong
bf80d1517d smb/client: remove unused elements from smb2_error_map_table array
STATUS_SUCCESS and STATUS_WAIT_0 are both zero, and since zero indicates
success, they are not needed.

Since smb2_print_status() has been removed, the last element in the array
is no longer needed.

Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-12-05 17:46:41 -06:00
ChenXiaoSong
6c1eb31ecb smb/client: reduce loop count in map_smb2_to_linux_error() by half
The smb2_error_map_table array currently has 1743 elements. When searching
for the last element and calling smb2_print_status(), 3486 comparisons
are needed.

The loop in smb2_print_status() is unnecessary, smb2_print_status() can be
removed, and only iterate over the array once, printing the message when
the target status code is found.

Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-12-05 17:46:41 -06:00
Paulo Alcantara
7ad785927d smb: client: Add tracepoint for krb5 auth
Add tracepoint to help debugging krb5 auth failures.

Example:

$ trace-cmd record -e smb3_kerberos_auth
$ mount.cifs ...
$ trace-cmd report
mount.cifs-1667 [003] .....  5810.668549: smb3_kerberos_auth: vers=2
host=w22-dc1.zelda.test ip=192.168.124.30:445 sec=krb5 uid=0 cruid=0
user=root pid=1667 upcall_target=app err=-126

Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Reviewed-by: David Howells <dhowells@redhat.com>
Cc: Pierguido Lambri <plambri@redhat.com>
Cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-12-05 17:40:42 -06:00
Paulo Alcantara
a8fce7c807 smb: client: improve error message when creating SMB session
When failing to create a new SMB session with 'sec=krb5' for example,
the following error message isn't very useful

	CIFS: VFS: \\srv Send error in SessSetup = -126

Improve it by printing the following instead on dmesg

	CIFS: VFS: \\srv failed to create a new SMB session with Kerberos: -126

Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Cc: Pierguido Lambri <plambri@redhat.com>
Reviewed-by: David Howells <dhowells@redhat.com>
Cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-12-05 17:40:38 -06:00
Paulo Alcantara
855982a52f smb: client: relax session and tcon reconnect attempts
When the client re-establishes connection to the server, it will queue
a worker thread that will attempt to reconnect sessions and tcons on
every two seconds, which is kinda overkill as it is a very common
scenario when having expired passwords or KRB5 TGT tickets, or deleted
shares.

Use an exponential backoff strategy to handle session/tcon reconnect
attempts in the worker thread to prevent the client from overloading
the system when it is very unlikely to re-establish any session/tcon
soon while client is idle.

Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Reviewed-by: David Howells <dhowells@redhat.com>
Cc: Pierguido Lambri <plambri@redhat.com>
Cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-12-05 17:40:33 -06:00
Linus Torvalds
4b6b432128 fuse update for 6.19
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Merge tag 'fuse-update-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

Pull fuse updates from Miklos Szeredi:

 - Add mechanism for cleaning out unused, stale dentries; controlled via
   a module option (Luis Henriques)

 - Fix various bugs

 - Cleanups

* tag 'fuse-update-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: Uninitialized variable in fuse_epoch_work()
  fuse: fix io-uring list corruption for terminated non-committed requests
  fuse: signal that a fuse inode should exhibit local fs behaviors
  fuse: Always flush the page cache before FOPEN_DIRECT_IO write
  fuse: Invalidate the page cache after FOPEN_DIRECT_IO write
  fuse: rename 'namelen' to 'namesize'
  fuse: use strscpy instead of strcpy
  fuse: refactor fuse_conn_put() to remove negative logic.
  fuse: new work queue to invalidate dentries from old epochs
  fuse: new work queue to periodically invalidate expired dentries
  dcache: export shrink_dentry_list() and add new helper d_dispose_if_unused()
  fuse: add WARN_ON and comment for RCU revalidate
  fuse: Fix whitespace for fuse_uring_args_to_ring() comment
  fuse: missing copy_finish in fuse-over-io-uring argument copies
  fuse: fix readahead reclaim deadlock
2025-12-05 15:25:13 -08:00
Praveen K Paladugu
615a6e7d83 mshv: Cleanly shutdown root partition with MSHV
Root partitions running on MSHV currently attempt ACPI power-off, which
MSHV intercepts and triggers a Machine Check Exception (MCE), leading
to a kernel panic.

Root partitions panic with a trace similar to:

  [   81.306348] reboot: Power down
  [   81.314709] mce: [Hardware Error]: CPU 0: Machine Check Exception: 4 Bank 0: b2000000c0060001
  [   81.314711] mce: [Hardware Error]: TSC 3b8cb60a66 PPIN 11d98332458e4ea9
  [   81.314713] mce: [Hardware Error]: PROCESSOR 0:606a6 TIME 1759339405 SOCKET 0 APIC 0 microcode ffffffff
  [   81.314715] mce: [Hardware Error]: Run the above through 'mcelog --ascii'
  [   81.314716] mce: [Hardware Error]: Machine check: Processor context corrupt
  [   81.314717] Kernel panic - not syncing: Fatal machine check

To avoid this, configure the sleep state in the hypervisor and invoke
the HVCALL_ENTER_SLEEP_STATE hypercall as the final step in the shutdown
sequence. This ensures a clean and safe shutdown of the root partition.

Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Co-developed-by: Anatol Belski <anbelski@linux.microsoft.com>
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
Reviewed-by: Easwar Hariharan <easwar.hariharan@linux.microsoft.com>
Acked-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2025-12-05 23:25:05 +00:00
Praveen K Paladugu
f0be2600ac mshv: Use reboot notifier to configure sleep state
Configure sleep state information from ACPI in MSHV hypervisor using
a reboot notifier. This data allows the hypervisor to correctly power
off the host during shutdown.

Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Co-developed-by: Anatol Belski <anbelski@linux.microsoft.com>
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
Reviewed-by: Easwar Hariharan <easwar.hariharan@linux.microsoft.com>
Reviewed-by: Stansialv Kinsburskii <skinsburskii@linux.miscrosoft.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2025-12-05 23:25:01 +00:00
Praveen K Paladugu
723c47a221 mshv: Add definitions for MSHV sleep state configuration
Add the definitions required to configure sleep states in mshv hypervsior.

Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Co-developed-by: Anatol Belski <anbelski@linux.microsoft.com>
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
Reviewed-by: Easwar Hariharan <easwar.hariharan@linux.microsoft.com>
Reviewed-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Acked-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2025-12-05 23:24:57 +00:00
Stanislav Kinsburskii
b9a66cd5cc mshv: Add support for movable memory regions
Introduce support for movable memory regions in the Hyper-V root partition
driver to improve memory management flexibility and enable advanced use
cases such as dynamic memory remapping.

Mirror the address space between the Linux root partition and guest VMs
using HMM. The root partition owns the memory, while guest VMs act as
devices with page tables managed via hypercalls. MSHV handles VP intercepts
by invoking hmm_range_fault() and updating SLAT entries. When memory is
reclaimed, HMM invalidates the relevant regions, prompting MSHV to clear
SLAT entries; guest VMs will fault again on access.

Integrate mmu_interval_notifier for movable regions, implement handlers for
HMM faults and memory invalidation, and update memory region mapping logic
to support movable regions.

While MMU notifiers are commonly used in virtualization drivers, this
implementation leverages HMM (Heterogeneous Memory Management) for its
specialized functionality. HMM provides a framework for mirroring,
invalidation, and fault handling, reducing boilerplate and improving
maintainability compared to generic MMU notifiers.

Signed-off-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Reviewed-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2025-12-05 23:20:49 +00:00