Introduce reset capability to EN7581 device-tree clock binding
documentation. Add reset register mapping between misc scu and pb scu
ones in order to follow the memory order. This change is not
introducing any backward compatibility issue since the EN7581 dts is not
upstream yet.
Fixes: 0a382be005 ("dt-bindings: clock: airoha: add EN7581 binding")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/28fef3e83062d5d71e7b4be4b47583f851a15bf8.1719485847.git.lorenzo@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Wrap icc_clk_register to create devm_icc_clk_register to be
able to release the resources properly.
Acked-by: Georgi Djakov <djakov@kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Link: https://lore.kernel.org/r/20240430064214.2030013-4-quic_varada@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Presently, icc-clk driver autogenerates the master and slave ids.
However, devices with multiple nodes on the interconnect could
have other constraints and may not match with the auto generated
node ids.
Hence, modify the driver to use the master/slave ids provided by
the caller instead of auto generating.
Also, update clk-cbf-8996 accordingly.
Acked-by: Georgi Djakov <djakov@kernel.org>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Link: https://lore.kernel.org/r/20240430064214.2030013-2-quic_varada@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Add interconnect-cells to clock provider so that it can be
used as icc provider.
Add master/slave ids for Qualcomm IPQ9574 Network-On-Chip
interfaces. This will be used by the gcc-ipq9574 driver
that will for providing interconnect services using the
icc-clk framework.
Acked-by: Georgi Djakov <djakov@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Link: https://lore.kernel.org/r/20240430064214.2030013-3-quic_varada@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
CLK_NR_CLKS should not be part of the binding.
Remove since the kernel code no longer uses it.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/6f21c09b-e8d2-4749-aca6-572c79df775d@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Merge SM8650 video and camera clock drivers through topic branch, to
make available the DeviceTree binding includes to the DeviceTree source
branches as well.
Add device tree bindings for the camera clock controller on
Qualcomm SM8650 platform.
Signed-off-by: Jagadeesh Kona <quic_jkona@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Link: https://lore.kernel.org/r/20240602114439.1611-7-quic_jkona@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
SM8650 video clock controller has most clocks same as SM8450,
but it also has few additional clocks and resets. Add device tree
bindings for the video clock controller on Qualcomm SM8650 platform
by defining these additional clocks and resets on top of SM8450.
Signed-off-by: Jagadeesh Kona <quic_jkona@quicinc.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Link: https://lore.kernel.org/r/20240602114439.1611-3-quic_jkona@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
The clock definitions in <dt-bindings/clock/r8a779?-clock.h> were
superseded by those in <dt-bindings/clock/r8a779?-cpg-mssr.h> a long
time ago.
The last DTS user of these files was removed in commit 362b334b17
("ARM: dts: r8a7791: Convert to new CPG/MSSR bindings") in v4.15.
Driver support for the old bindings was removed in commit
58256143cf ("clk: renesas: Remove R-Car Gen2 legacy DT clock
support") in v5.5, so there is no point to keep on carrying these.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/d4abb688d666be35e99577a25b16958cbb4c3c98.1718796005.git.geert+renesas@glider.be
CLK_NR_CLKS should not be part of the binding. Let's drop it, since
the kernel code no longer uses it either.
Signed-off-by: Alex Bee <knaerzche@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240606143401.32454-4-knaerzche@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Add the required clock bindings for the GPADC.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240605172049.231108-2-macroalpha82@gmail.com
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Add bindings for the clock generator of divider/mux and gates working
for other subsystem than RP subsystem for Sophgo SG2042.
Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Add bindings for the gate clocks of RP subsystem for Sophgo SG2042.
Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Add bindings for the pll clocks for Sophgo SG2042.
Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Guo Ren <guoren@kernel.org>
QCA8386/QCA8084 includes the clock & reset controller that is
accessed by MDIO bus. Two work modes are supported, qca8386 works
as switch mode, qca8084 works as PHY mode.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Luo Jie <quic_luoj@quicinc.com>
Link: https://lore.kernel.org/r/20240605124541.2711467-3-quic_luoj@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
The 'sys_pll' input is an optional clock that can be used to generate
'sys_pll_div16', which serves as one of the sources for the GEN clock.
Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20240515185103.20256-5-ddrokosov@salutedevices.com
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
The 'syspll' PLL is a general-purpose PLL designed specifically for the
CPU clock. It is capable of producing output frequencies within the
range of 768MHz to 1536MHz.
The 'syspll_in' source clock is an optional parent connection from the
peripherals clock controller.
Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20240515185103.20256-3-ddrokosov@salutedevices.com
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
The DPHY's APB clock is required to be exposed in order to be able to
enable it and access the phy's registers.
Signed-off-by: Alex Bee <knaerzche@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240509140653.168591-3-knaerzche@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Add device tree bindings for the video clock controller on Qualcomm
SM7150 platform.
Signed-off-by: Danila Tikhonov <danila@jiaxyga.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240505201038.276047-8-danila@jiaxyga.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Add device tree bindings for the camera clock controller on Qualcomm
SM7150 platform.
Signed-off-by: Danila Tikhonov <danila@jiaxyga.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240505201038.276047-6-danila@jiaxyga.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Add device tree bindings for the display clock controller on Qualcomm
SM7150 platform.
Co-developed-by: David Wronek <david@mainlining.org>
Signed-off-by: David Wronek <david@mainlining.org>
Signed-off-by: Danila Tikhonov <danila@jiaxyga.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240505201038.276047-4-danila@jiaxyga.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
percpu.h depends on smp.h, but doesn't include it directly because of
circular header dependency issues; percpu.h is needed in a bunch of low
level headers.
This fixes a randconfig build error on mips:
include/linux/alloc_tag.h: In function '__alloc_tag_ref_set':
include/asm-generic/percpu.h:31:40: error: implicit declaration of function 'raw_smp_processor_id' [-Werror=implicit-function-declaration]
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 24e44cc22a ("mm: percpu: enable per-cpu allocation tagging")
Closes: https://lore.kernel.org/oe-kbuild-all/202405210052.DIrMXJNz-lkp@intel.com/
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge tag '6.10-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fixes from Steve French:
- two important netfs integration fixes - including for a data
corruption and also fixes for multiple xfstests
- reenable swap support over SMB3
* tag '6.10-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
cifs: Fix missing set of remote_i_size
cifs: Fix smb3_insert_range() to move the zero_point
cifs: update internal version number
smb3: reenable swapfiles over SMB3 mounts
A few nilfs2 fixes, the remainder are for MM: a couple of selftests fixes,
various singletons fixing various issues in various parts.
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Merge tag 'mm-hotfixes-stable-2024-05-25-09-13' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"16 hotfixes, 11 of which are cc:stable.
A few nilfs2 fixes, the remainder are for MM: a couple of selftests
fixes, various singletons fixing various issues in various parts"
* tag 'mm-hotfixes-stable-2024-05-25-09-13' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
mm/ksm: fix possible UAF of stable_node
mm/memory-failure: fix handling of dissolved but not taken off from buddy pages
mm: /proc/pid/smaps_rollup: avoid skipping vma after getting mmap_lock again
nilfs2: fix potential hang in nilfs_detach_log_writer()
nilfs2: fix unexpected freezing of nilfs_segctor_sync()
nilfs2: fix use-after-free of timer for log writer thread
selftests/mm: fix build warnings on ppc64
arm64: patching: fix handling of execmem addresses
selftests/mm: compaction_test: fix bogus test success and reduce probability of OOM-killer invocation
selftests/mm: compaction_test: fix incorrect write of zero to nr_hugepages
selftests/mm: compaction_test: fix bogus test success on Aarch64
mailmap: update email address for Satya Priya
mm/huge_memory: don't unpoison huge_zero_folio
kasan, fortify: properly rename memintrinsics
lib: add version into /proc/allocinfo output
mm/vmalloc: fix vmalloc which may return null if called with __GFP_NOFAIL
- Fix regressions of the new x86 CPU VFM (vendor/family/model)
enumeration/matching code
- Fix crash kernel detection on buggy firmware with
non-compliant ACPI MADT tables
- Address Kconfig warning
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-urgent-2024-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
- Fix regressions of the new x86 CPU VFM (vendor/family/model)
enumeration/matching code
- Fix crash kernel detection on buggy firmware with
non-compliant ACPI MADT tables
- Address Kconfig warning
* tag 'x86-urgent-2024-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Fix x86_match_cpu() to match just X86_VENDOR_INTEL
crypto: x86/aes-xts - switch to new Intel CPU model defines
x86/topology: Handle bogus ACPI tables correctly
x86/kconfig: Select ARCH_WANT_FRAME_POINTERS again when UNWINDER_FRAME_POINTER=y
nouveau:
- fix bo metadata uAPI for vm bind
panthor:
- Fixes for panthor's heap logical block.
- Reset on unrecoverable fault
- Fix VM references.
- Reset fix.
xlnx:
- xlnx compile and doc fixes.
amdgpu:
- Handle vbios table integrated info v2.3
amdkfd:
- Handle duplicate BOs in reserve_bo_and_cond_vms
- Handle memory limitations on small APUs
dp/mst:
- MST null deref fix.
bridge:
- Don't let next bridge create connector in adv7511 to make probe work.
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Merge tag 'drm-next-2024-05-25' of https://gitlab.freedesktop.org/drm/kernel
Pull drm fixes from Dave Airlie:
"Some fixes for the end of the merge window, mostly amdgpu and panthor,
with one nouveau uAPI change that fixes a bad decision we made a few
months back.
nouveau:
- fix bo metadata uAPI for vm bind
panthor:
- Fixes for panthor's heap logical block.
- Reset on unrecoverable fault
- Fix VM references.
- Reset fix.
xlnx:
- xlnx compile and doc fixes.
amdgpu:
- Handle vbios table integrated info v2.3
amdkfd:
- Handle duplicate BOs in reserve_bo_and_cond_vms
- Handle memory limitations on small APUs
dp/mst:
- MST null deref fix.
bridge:
- Don't let next bridge create connector in adv7511 to make probe
work"
* tag 'drm-next-2024-05-25' of https://gitlab.freedesktop.org/drm/kernel:
drm/amdgpu/atomfirmware: add intergrated info v2.3 table
drm/mst: Fix NULL pointer dereference at drm_dp_add_payload_part2
drm/amdkfd: Let VRAM allocations go to GTT domain on small APUs
drm/amdkfd: handle duplicate BOs in reserve_bo_and_cond_vms
drm/bridge: adv7511: Attach next bridge without creating connector
drm/buddy: Fix the warn on's during force merge
drm/nouveau: use tile_mode and pte_kind for VM_BIND bo allocations
drm/panthor: Call panthor_sched_post_reset() even if the reset failed
drm/panthor: Reset the FW VM to NULL on unplug
drm/panthor: Keep a ref to the VM at the panthor_kernel_bo level
drm/panthor: Force an immediate reset on unrecoverable faults
drm/panthor: Document drm_panthor_tiler_heap_destroy::handle validity constraints
drm/panthor: Fix an off-by-one in the heap context retrieval logic
drm/panthor: Relax the constraints on the tiler chunk size
drm/panthor: Make sure the tiler initial/max chunks are consistent
drm/panthor: Fix tiler OOM handling to allow incremental rendering
drm: xlnx: zynqmp_dpsub: Fix compilation error
drm: xlnx: zynqmp_dpsub: Fix few function comments
After commit 69d4c0d321 ("entry, kasan, x86: Disallow overriding mem*()
functions") and the follow-up fixes, with CONFIG_FORTIFY_SOURCE enabled,
even though the compiler instruments meminstrinsics by generating calls to
__asan/__hwasan_ prefixed functions, FORTIFY_SOURCE still uses
uninstrumented memset/memmove/memcpy as the underlying functions.
As a result, KASAN cannot detect bad accesses in memset/memmove/memcpy.
This also makes KASAN tests corrupt kernel memory and cause crashes.
To fix this, use __asan_/__hwasan_memset/memmove/memcpy as the underlying
functions whenever appropriate. Do this only for the instrumented code
(as indicated by __SANITIZE_ADDRESS__).
Link: https://lkml.kernel.org/r/20240517130118.759301-1-andrey.konovalov@linux.dev
Fixes: 69d4c0d321 ("entry, kasan, x86: Disallow overriding mem*() functions")
Fixes: 51287dcb00 ("kasan: emit different calls for instrumentable memintrinsics")
Fixes: 36be5cba99 ("kasan: treat meminstrinsic as builtins in uninstrumented files")
Signed-off-by: Andrey Konovalov <andreyknvl@gmail.com>
Reported-by: Erhard Furtner <erhard_f@mailbox.org>
Reported-by: Nico Pache <npache@redhat.com>
Closes: https://lore.kernel.org/all/20240501144156.17e65021@outsider.home/
Reviewed-by: Marco Elver <elver@google.com>
Tested-by: Nico Pache <npache@redhat.com>
Acked-by: Nico Pache <npache@redhat.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Daniel Axtens <dja@axtens.net>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* The compression format used for boot images is now configurable at
build time, and these formats are shown in `make help`.
* access_ok() has been optimized.
* A pair of performance bugs have been fixed in the uaccess handlers.
* Various fixes and cleanups, including one for the IMSIC build failure
and one for the early-boot ftrace illegal NOPs bug.
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Merge tag 'riscv-for-linus-6.10-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull more RISC-V updates from Palmer Dabbelt:
- The compression format used for boot images is now configurable at
build time, and these formats are shown in `make help`
- access_ok() has been optimized
- A pair of performance bugs have been fixed in the uaccess handlers
- Various fixes and cleanups, including one for the IMSIC build failure
and one for the early-boot ftrace illegal NOPs bug
* tag 'riscv-for-linus-6.10-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: Fix early ftrace nop patching
irqchip: riscv-imsic: Fixup riscv_ipi_set_virq_range() conflict
riscv: selftests: Add signal handling vector tests
riscv: mm: accelerate pagefault when badaccess
riscv: uaccess: Relax the threshold for fast path
riscv: uaccess: Allow the last potential unrolled copy
riscv: typo in comment for get_f64_reg
Use bool value in set_cpu_online()
riscv: selftests: Add hwprobe binaries to .gitignore
riscv: stacktrace: fixed walk_stackframe()
ftrace: riscv: move from REGS to ARGS
riscv: do not select MODULE_SECTIONS by default
riscv: show help string for riscv-specific targets
riscv: make image compression configurable
riscv: cpufeature: Fix extension subset checking
riscv: cpufeature: Fix thead vector hwcap removal
riscv: rewrite __kernel_map_pages() to fix sleeping in invalid context
riscv: force PAGE_SIZE linear mapping if debug_pagealloc is enabled
riscv: Define TASK_SIZE_MAX for __access_ok()
riscv: Remove PGDIR_SIZE_L3 and TASK_SIZE_MIN
A collection of small fixes for 6.10-rc1. Most of changes are
various device-specific fixes and quirks, while there are a few small
changes in ALSA core timer and module / built-in fixes.
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Merge tag 'sound-fix-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of small fixes for 6.10-rc1. Most of changes are various
device-specific fixes and quirks, while there are a few small changes
in ALSA core timer and module / built-in fixes"
* tag 'sound-fix-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek: fix mute/micmute LEDs don't work for ProBook 440/460 G11.
ALSA: core: Enable proc module when CONFIG_MODULES=y
ALSA: core: Fix NULL module pointer assignment at card init
ALSA: hda/realtek: Enable headset mic of JP-IK LEAP W502 with ALC897
ASoC: dt-bindings: stm32: Ensure compatible pattern matches whole string
ASoC: tas2781: Fix wrong loading calibrated data sequence
ASoC: tas2552: Add TX path for capturing AUDIO-OUT data
ALSA: usb-audio: Fix for sampling rates support for Mbox3
Documentation: sound: Fix trailing whitespaces
ALSA: timer: Set lower bound of start tick time
ASoC: codecs: ES8326: solve hp and button detect issue
ASoC: rt5645: mic-in detection threshold modification
ASoC: Intel: sof_sdw_rt_sdca_jack_common: Use name_prefix for `-sdca` detection
The new mseal() is an syscall on 64 bit CPU, and with following signature:
int mseal(void addr, size_t len, unsigned long flags)
addr/len: memory range.
flags: reserved.
mseal() blocks following operations for the given memory range.
1> Unmapping, moving to another location, and shrinking the size,
via munmap() and mremap(), can leave an empty space, therefore can
be replaced with a VMA with a new set of attributes.
2> Moving or expanding a different VMA into the current location,
via mremap().
3> Modifying a VMA via mmap(MAP_FIXED).
4> Size expansion, via mremap(), does not appear to pose any specific
risks to sealed VMAs. It is included anyway because the use case is
unclear. In any case, users can rely on merging to expand a sealed VMA.
5> mprotect() and pkey_mprotect().
6> Some destructive madvice() behaviors (e.g. MADV_DONTNEED) for anonymous
memory, when users don't have write permission to the memory. Those
behaviors can alter region contents by discarding pages, effectively a
memset(0) for anonymous memory.
Following input during RFC are incooperated into this patch:
Jann Horn: raising awareness and providing valuable insights on the
destructive madvise operations.
Linus Torvalds: assisting in defining system call signature and scope.
Liam R. Howlett: perf optimization.
Theo de Raadt: sharing the experiences and insight gained from
implementing mimmutable() in OpenBSD.
Finally, the idea that inspired this patch comes from Stephen Röttger's
work in Chrome V8 CFI.
[jeffxu@chromium.org: add branch prediction hint, per Pedro]
Link: https://lkml.kernel.org/r/20240423192825.1273679-2-jeffxu@chromium.org
Link: https://lkml.kernel.org/r/20240415163527.626541-3-jeffxu@chromium.org
Signed-off-by: Jeff Xu <jeffxu@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Jann Horn <jannh@google.com>
Cc: Jeff Xu <jeffxu@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jorge Lucangeli Obes <jorgelo@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Stephen Röttger <sroettger@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Amer Al Shanawany <amer.shanawany@gmail.com>
Cc: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "Introduce mseal", v10.
This patchset proposes a new mseal() syscall for the Linux kernel.
In a nutshell, mseal() protects the VMAs of a given virtual memory range
against modifications, such as changes to their permission bits.
Modern CPUs support memory permissions, such as the read/write (RW) and
no-execute (NX) bits. Linux has supported NX since the release of kernel
version 2.6.8 in August 2004 [1]. The memory permission feature improves
the security stance on memory corruption bugs, as an attacker cannot
simply write to arbitrary memory and point the code to it. The memory
must be marked with the X bit, or else an exception will occur.
Internally, the kernel maintains the memory permissions in a data
structure called VMA (vm_area_struct). mseal() additionally protects the
VMA itself against modifications of the selected seal type.
Memory sealing is useful to mitigate memory corruption issues where a
corrupted pointer is passed to a memory management system. For example,
such an attacker primitive can break control-flow integrity guarantees
since read-only memory that is supposed to be trusted can become writable
or .text pages can get remapped. Memory sealing can automatically be
applied by the runtime loader to seal .text and .rodata pages and
applications can additionally seal security critical data at runtime. A
similar feature already exists in the XNU kernel with the
VM_FLAGS_PERMANENT [3] flag and on OpenBSD with the mimmutable syscall
[4]. Also, Chrome wants to adopt this feature for their CFI work [2] and
this patchset has been designed to be compatible with the Chrome use case.
Two system calls are involved in sealing the map: mmap() and mseal().
The new mseal() is an syscall on 64 bit CPU, and with following signature:
int mseal(void addr, size_t len, unsigned long flags)
addr/len: memory range.
flags: reserved.
mseal() blocks following operations for the given memory range.
1> Unmapping, moving to another location, and shrinking the size,
via munmap() and mremap(), can leave an empty space, therefore can
be replaced with a VMA with a new set of attributes.
2> Moving or expanding a different VMA into the current location,
via mremap().
3> Modifying a VMA via mmap(MAP_FIXED).
4> Size expansion, via mremap(), does not appear to pose any specific
risks to sealed VMAs. It is included anyway because the use case is
unclear. In any case, users can rely on merging to expand a sealed VMA.
5> mprotect() and pkey_mprotect().
6> Some destructive madvice() behaviors (e.g. MADV_DONTNEED) for anonymous
memory, when users don't have write permission to the memory. Those
behaviors can alter region contents by discarding pages, effectively a
memset(0) for anonymous memory.
The idea that inspired this patch comes from Stephen Röttger’s work in
V8 CFI [5]. Chrome browser in ChromeOS will be the first user of this
API.
Indeed, the Chrome browser has very specific requirements for sealing,
which are distinct from those of most applications. For example, in the
case of libc, sealing is only applied to read-only (RO) or read-execute
(RX) memory segments (such as .text and .RELRO) to prevent them from
becoming writable, the lifetime of those mappings are tied to the lifetime
of the process.
Chrome wants to seal two large address space reservations that are managed
by different allocators. The memory is mapped RW- and RWX respectively
but write access to it is restricted using pkeys (or in the future ARM
permission overlay extensions). The lifetime of those mappings are not
tied to the lifetime of the process, therefore, while the memory is
sealed, the allocators still need to free or discard the unused memory.
For example, with madvise(DONTNEED).
However, always allowing madvise(DONTNEED) on this range poses a security
risk. For example if a jump instruction crosses a page boundary and the
second page gets discarded, it will overwrite the target bytes with zeros
and change the control flow. Checking write-permission before the discard
operation allows us to control when the operation is valid. In this case,
the madvise will only succeed if the executing thread has PKEY write
permissions and PKRU changes are protected in software by control-flow
integrity.
Although the initial version of this patch series is targeting the Chrome
browser as its first user, it became evident during upstream discussions
that we would also want to ensure that the patch set eventually is a
complete solution for memory sealing and compatible with other use cases.
The specific scenario currently in mind is glibc's use case of loading and
sealing ELF executables. To this end, Stephen is working on a change to
glibc to add sealing support to the dynamic linker, which will seal all
non-writable segments at startup. Once this work is completed, all
applications will be able to automatically benefit from these new
protections.
In closing, I would like to formally acknowledge the valuable
contributions received during the RFC process, which were instrumental in
shaping this patch:
Jann Horn: raising awareness and providing valuable insights on the
destructive madvise operations.
Liam R. Howlett: perf optimization.
Linus Torvalds: assisting in defining system call signature and scope.
Theo de Raadt: sharing the experiences and insight gained from
implementing mimmutable() in OpenBSD.
MM perf benchmarks
==================
This patch adds a loop in the mprotect/munmap/madvise(DONTNEED) to
check the VMAs’ sealing flag, so that no partial update can be made,
when any segment within the given memory range is sealed.
To measure the performance impact of this loop, two tests are developed.
[8]
The first is measuring the time taken for a particular system call,
by using clock_gettime(CLOCK_MONOTONIC). The second is using
PERF_COUNT_HW_REF_CPU_CYCLES (exclude user space). Both tests have
similar results.
The tests have roughly below sequence:
for (i = 0; i < 1000, i++)
create 1000 mappings (1 page per VMA)
start the sampling
for (j = 0; j < 1000, j++)
mprotect one mapping
stop and save the sample
delete 1000 mappings
calculates all samples.
Below tests are performed on Intel(R) Pentium(R) Gold 7505 @ 2.00GHz,
4G memory, Chromebook.
Based on the latest upstream code:
The first test (measuring time)
syscall__ vmas t t_mseal delta_ns per_vma %
munmap__ 1 909 944 35 35 104%
munmap__ 2 1398 1502 104 52 107%
munmap__ 4 2444 2594 149 37 106%
munmap__ 8 4029 4323 293 37 107%
munmap__ 16 6647 6935 288 18 104%
munmap__ 32 11811 12398 587 18 105%
mprotect 1 439 465 26 26 106%
mprotect 2 1659 1745 86 43 105%
mprotect 4 3747 3889 142 36 104%
mprotect 8 6755 6969 215 27 103%
mprotect 16 13748 14144 396 25 103%
mprotect 32 27827 28969 1142 36 104%
madvise_ 1 240 262 22 22 109%
madvise_ 2 366 442 76 38 121%
madvise_ 4 623 751 128 32 121%
madvise_ 8 1110 1324 215 27 119%
madvise_ 16 2127 2451 324 20 115%
madvise_ 32 4109 4642 534 17 113%
The second test (measuring cpu cycle)
syscall__ vmas cpu cmseal delta_cpu per_vma %
munmap__ 1 1790 1890 100 100 106%
munmap__ 2 2819 3033 214 107 108%
munmap__ 4 4959 5271 312 78 106%
munmap__ 8 8262 8745 483 60 106%
munmap__ 16 13099 14116 1017 64 108%
munmap__ 32 23221 24785 1565 49 107%
mprotect 1 906 967 62 62 107%
mprotect 2 3019 3203 184 92 106%
mprotect 4 6149 6569 420 105 107%
mprotect 8 9978 10524 545 68 105%
mprotect 16 20448 21427 979 61 105%
mprotect 32 40972 42935 1963 61 105%
madvise_ 1 434 497 63 63 115%
madvise_ 2 752 899 147 74 120%
madvise_ 4 1313 1513 200 50 115%
madvise_ 8 2271 2627 356 44 116%
madvise_ 16 4312 4883 571 36 113%
madvise_ 32 8376 9319 943 29 111%
Based on the result, for 6.8 kernel, sealing check adds
20-40 nano seconds, or around 50-100 CPU cycles, per VMA.
In addition, I applied the sealing to 5.10 kernel:
The first test (measuring time)
syscall__ vmas t tmseal delta_ns per_vma %
munmap__ 1 357 390 33 33 109%
munmap__ 2 442 463 21 11 105%
munmap__ 4 614 634 20 5 103%
munmap__ 8 1017 1137 120 15 112%
munmap__ 16 1889 2153 263 16 114%
munmap__ 32 4109 4088 -21 -1 99%
mprotect 1 235 227 -7 -7 97%
mprotect 2 495 464 -30 -15 94%
mprotect 4 741 764 24 6 103%
mprotect 8 1434 1437 2 0 100%
mprotect 16 2958 2991 33 2 101%
mprotect 32 6431 6608 177 6 103%
madvise_ 1 191 208 16 16 109%
madvise_ 2 300 324 24 12 108%
madvise_ 4 450 473 23 6 105%
madvise_ 8 753 806 53 7 107%
madvise_ 16 1467 1592 125 8 108%
madvise_ 32 2795 3405 610 19 122%
The second test (measuring cpu cycle)
syscall__ nbr_vma cpu cmseal delta_cpu per_vma %
munmap__ 1 684 715 31 31 105%
munmap__ 2 861 898 38 19 104%
munmap__ 4 1183 1235 51 13 104%
munmap__ 8 1999 2045 46 6 102%
munmap__ 16 3839 3816 -23 -1 99%
munmap__ 32 7672 7887 216 7 103%
mprotect 1 397 443 46 46 112%
mprotect 2 738 788 50 25 107%
mprotect 4 1221 1256 35 9 103%
mprotect 8 2356 2429 72 9 103%
mprotect 16 4961 4935 -26 -2 99%
mprotect 32 9882 10172 291 9 103%
madvise_ 1 351 380 29 29 108%
madvise_ 2 565 615 49 25 109%
madvise_ 4 872 933 61 15 107%
madvise_ 8 1508 1640 132 16 109%
madvise_ 16 3078 3323 245 15 108%
madvise_ 32 5893 6704 811 25 114%
For 5.10 kernel, sealing check adds 0-15 ns in time, or 10-30
CPU cycles, there is even decrease in some cases.
It might be interesting to compare 5.10 and 6.8 kernel
The first test (measuring time)
syscall__ vmas t_5_10 t_6_8 delta_ns per_vma %
munmap__ 1 357 909 552 552 254%
munmap__ 2 442 1398 956 478 316%
munmap__ 4 614 2444 1830 458 398%
munmap__ 8 1017 4029 3012 377 396%
munmap__ 16 1889 6647 4758 297 352%
munmap__ 32 4109 11811 7702 241 287%
mprotect 1 235 439 204 204 187%
mprotect 2 495 1659 1164 582 335%
mprotect 4 741 3747 3006 752 506%
mprotect 8 1434 6755 5320 665 471%
mprotect 16 2958 13748 10790 674 465%
mprotect 32 6431 27827 21397 669 433%
madvise_ 1 191 240 49 49 125%
madvise_ 2 300 366 67 33 122%
madvise_ 4 450 623 173 43 138%
madvise_ 8 753 1110 357 45 147%
madvise_ 16 1467 2127 660 41 145%
madvise_ 32 2795 4109 1314 41 147%
The second test (measuring cpu cycle)
syscall__ vmas cpu_5_10 c_6_8 delta_cpu per_vma %
munmap__ 1 684 1790 1106 1106 262%
munmap__ 2 861 2819 1958 979 327%
munmap__ 4 1183 4959 3776 944 419%
munmap__ 8 1999 8262 6263 783 413%
munmap__ 16 3839 13099 9260 579 341%
munmap__ 32 7672 23221 15549 486 303%
mprotect 1 397 906 509 509 228%
mprotect 2 738 3019 2281 1140 409%
mprotect 4 1221 6149 4929 1232 504%
mprotect 8 2356 9978 7622 953 423%
mprotect 16 4961 20448 15487 968 412%
mprotect 32 9882 40972 31091 972 415%
madvise_ 1 351 434 82 82 123%
madvise_ 2 565 752 186 93 133%
madvise_ 4 872 1313 442 110 151%
madvise_ 8 1508 2271 763 95 151%
madvise_ 16 3078 4312 1234 77 140%
madvise_ 32 5893 8376 2483 78 142%
From 5.10 to 6.8
munmap: added 250-550 ns in time, or 500-1100 in cpu cycle, per vma.
mprotect: added 200-750 ns in time, or 500-1200 in cpu cycle, per vma.
madvise: added 33-50 ns in time, or 70-110 in cpu cycle, per vma.
In comparison to mseal, which adds 20-40 ns or 50-100 CPU cycles, the
increase from 5.10 to 6.8 is significantly larger, approximately ten times
greater for munmap and mprotect.
When I discuss the mm performance with Brian Makin, an engineer who worked
on performance, it was brought to my attention that such performance
benchmarks, which measuring millions of mm syscall in a tight loop, may
not accurately reflect real-world scenarios, such as that of a database
service. Also this is tested using a single HW and ChromeOS, the data
from another HW or distribution might be different. It might be best to
take this data with a grain of salt.
This patch (of 5):
Wire up mseal syscall for all architectures.
Link: https://lkml.kernel.org/r/20240415163527.626541-1-jeffxu@chromium.org
Link: https://lkml.kernel.org/r/20240415163527.626541-2-jeffxu@chromium.org
Signed-off-by: Jeff Xu <jeffxu@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Jann Horn <jannh@google.com> [Bug #2]
Cc: Jeff Xu <jeffxu@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jorge Lucangeli Obes <jorgelo@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Stephen Röttger <sroettger@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Amer Al Shanawany <amer.shanawany@gmail.com>
Cc: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Highlights include:
Stable fixes:
- nfs: fix undefined behavior in nfs_block_bits()
- NFSv4.2: Fix READ_PLUS when server doesn't support OP_READ_PLUS
Bugfixes:
- Fix mixing of the lock/nolock and local_lock mount options
- NFSv4: Fixup smatch warning for ambiguous return
- NFSv3: Fix remount when using the legacy binary mount api
- SUNRPC: Fix the handling of expired RPCSEC_GSS contexts
- SUNRPC: fix the NFSACL RPC retries when soft mounts are enabled
- rpcrdma: fix handling for RDMA_CM_EVENT_DEVICE_REMOVAL
Features and cleanups:
- NFSv3: Use the atomic_open API to fix open(O_CREAT|O_TRUNC)
- pNFS/filelayout: S layout segment range in LAYOUTGET
- pNFS: rework pnfs_generic_pg_check_layout to check IO range
- NFSv2: Turn off enabling of NFS v2 by default
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Merge tag 'nfs-for-6.10-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Stable fixes:
- nfs: fix undefined behavior in nfs_block_bits()
- NFSv4.2: Fix READ_PLUS when server doesn't support OP_READ_PLUS
Bugfixes:
- Fix mixing of the lock/nolock and local_lock mount options
- NFSv4: Fixup smatch warning for ambiguous return
- NFSv3: Fix remount when using the legacy binary mount api
- SUNRPC: Fix the handling of expired RPCSEC_GSS contexts
- SUNRPC: fix the NFSACL RPC retries when soft mounts are enabled
- rpcrdma: fix handling for RDMA_CM_EVENT_DEVICE_REMOVAL
Features and cleanups:
- NFSv3: Use the atomic_open API to fix open(O_CREAT|O_TRUNC)
- pNFS/filelayout: S layout segment range in LAYOUTGET
- pNFS: rework pnfs_generic_pg_check_layout to check IO range
- NFSv2: Turn off enabling of NFS v2 by default"
* tag 'nfs-for-6.10-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
nfs: fix undefined behavior in nfs_block_bits()
pNFS: rework pnfs_generic_pg_check_layout to check IO range
pNFS/filelayout: check layout segment range
pNFS/filelayout: fixup pNfs allocation modes
rpcrdma: fix handling for RDMA_CM_EVENT_DEVICE_REMOVAL
NFS: Don't enable NFS v2 by default
NFS: Fix READ_PLUS when server doesn't support OP_READ_PLUS
sunrpc: fix NFSACL RPC retry on soft mount
SUNRPC: fix handling expired GSS context
nfs: keep server info for remounts
NFSv4: Fixup smatch warning for ambiguous return
NFS: make sure lock/nolock overriding local_lock mount option
NFS: add atomic_open for NFSv3 to handle O_TRUNC correctly.
pNFS/filelayout: Specify the layout segment range in LAYOUTGET
pNFS/filelayout: Remove the whole file layout requirement
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Merge tag 'block-6.10-20240523' of git://git.kernel.dk/linux
Pull more block updates from Jens Axboe:
"Followup block updates, mostly due to NVMe being a bit late to the
party. But nothing major in there, so not a big deal.
In detail, this contains:
- NVMe pull request via Keith:
- Fabrics connection retries (Daniel, Hannes)
- Fabrics logging enhancements (Tokunori)
- RDMA delete optimization (Sagi)
- ublk DMA alignment fix (me)
- null_blk sparse warning fixes (Bart)
- Discard support for brd (Keith)
- blk-cgroup list corruption fixes (Ming)
- blk-cgroup stat propagation fix (Waiman)
- Regression fix for plugging stall with md (Yu)
- Misc fixes or cleanups (David, Jeff, Justin)"
* tag 'block-6.10-20240523' of git://git.kernel.dk/linux: (24 commits)
null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues'
blk-throttle: remove unused struct 'avg_latency_bucket'
block: fix lost bio for plug enabled bio based device
block: t10-pi: add MODULE_DESCRIPTION()
blk-mq: add helper for checking if one CPU is mapped to specified hctx
blk-cgroup: Properly propagate the iostat update up the hierarchy
blk-cgroup: fix list corruption from reorder of WRITE ->lqueued
blk-cgroup: fix list corruption from resetting io stat
cdrom: rearrange last_media_change check to avoid unintentional overflow
nbd: Fix signal handling
nbd: Remove a local variable from nbd_send_cmd()
nbd: Improve the documentation of the locking assumptions
nbd: Remove superfluous casts
nbd: Use NULL to represent a pointer
brd: implement discard support
null_blk: Fix two sparse warnings
ublk_drv: set DMA alignment mask to 3
nvme-rdma, nvme-tcp: include max reconnects for reconnect logging
nvmet-rdma: Avoid o(n^2) loop in delete_ctrl
nvme: do not retry authentication failures
...
A bunch of fixes that came in during the merge window, Matti found
several issues with some of the more complexly configured Rohm
regulators and the helpers they use and there were some errors in the
specification of tps6594 when regulators are grouped together.
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Merge tag 'regulator-fix-v6.10-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"A bunch of fixes that came in during the merge window.
Matti found several issues with some of the more complexly configured
Rohm regulators and the helpers they use and there were some errors in
the specification of tps6594 when regulators are grouped together"
* tag 'regulator-fix-v6.10-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: tps6594-regulator: Correct multi-phase configuration
regulator: tps6287x: Force writing VSEL bit
regulator: pickable ranges: don't always cache vsel
regulator: rohm-regulator: warn if unsupported voltage is set
regulator: bd71828: Don't overwrite runtime voltages
The __assign_str() macro logic of the TRACE_EVENT() macro was optimized so
that it no longer needs the second argument. The __assign_str() is always
matched with __string() field that takes a field name and the source for
that field:
__string(field, source)
The TRACE_EVENT() macro logic will save off the source value and then use
that value to copy into the ring buffer via the __assign_str(). Before
commit c1fa617cae ("tracing: Rework __assign_str() and __string() to not
duplicate getting the string"), the __assign_str() needed the second
argument which would perform the same logic as the __string() source
parameter did. Not only would this add overhead, but it was error prone as
if the __assign_str() source produced something different, it may not have
allocated enough for the string in the ring buffer (as the __string()
source was used to determine how much to allocate)
Now that the __assign_str() just uses the same string that was used in
__string() it no longer needs the source parameter. It can now be removed.
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Merge tag 'trace-assign-str-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull tracing cleanup from Steven Rostedt:
"Remove second argument of __assign_str()
The __assign_str() macro logic of the TRACE_EVENT() macro was
optimized so that it no longer needs the second argument. The
__assign_str() is always matched with __string() field that takes a
field name and the source for that field:
__string(field, source)
The TRACE_EVENT() macro logic will save off the source value and then
use that value to copy into the ring buffer via the __assign_str().
Before commit c1fa617cae ("tracing: Rework __assign_str() and
__string() to not duplicate getting the string"), the __assign_str()
needed the second argument which would perform the same logic as the
__string() source parameter did. Not only would this add overhead, but
it was error prone as if the __assign_str() source produced something
different, it may not have allocated enough for the string in the ring
buffer (as the __string() source was used to determine how much to
allocate)
Now that the __assign_str() just uses the same string that was used in
__string() it no longer needs the source parameter. It can now be
removed"
* tag 'trace-assign-str-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing/treewide: Remove second parameter of __assign_str()
Several new features here:
- virtio-net is finally supported in vduse.
- Virtio (balloon and mem) interaction with suspend is improved
- vhost-scsi now handles signals better/faster.
Fixes, cleanups all over the place.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio updates from Michael Tsirkin:
"Several new features here:
- virtio-net is finally supported in vduse
- virtio (balloon and mem) interaction with suspend is improved
- vhost-scsi now handles signals better/faster
And fixes, cleanups all over the place"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (48 commits)
virtio-pci: Check if is_avq is NULL
virtio: delete vq in vp_find_vqs_msix() when request_irq() fails
MAINTAINERS: add Eugenio Pérez as reviewer
vhost-vdpa: Remove usage of the deprecated ida_simple_xx() API
vp_vdpa: don't allocate unused msix vectors
sound: virtio: drop owner assignment
fuse: virtio: drop owner assignment
scsi: virtio: drop owner assignment
rpmsg: virtio: drop owner assignment
nvdimm: virtio_pmem: drop owner assignment
wifi: mac80211_hwsim: drop owner assignment
vsock/virtio: drop owner assignment
net: 9p: virtio: drop owner assignment
net: virtio: drop owner assignment
net: caif: virtio: drop owner assignment
misc: nsm: drop owner assignment
iommu: virtio: drop owner assignment
drm/virtio: drop owner assignment
gpio: virtio: drop owner assignment
firmware: arm_scmi: virtio: drop owner assignment
...
A bunch of fixes that came in during the merge window, all driver
specific and none of them especially remarkable.
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Merge tag 'asoc-fix-v6.10-merge-window' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.10
A bunch of fixes that came in during the merge window, all driver
specific and none of them especially remarkable.