linux-toradex.git/arch/mips/include, branch v6.4-rc2 Linux kernel for Apalis and Colibri modules Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2023-05-05T19:56:55+00:00 Linus Torvalds torvalds@linux-foundation.org 2023-05-05T19:56:55+00:00 b115d85a9584c98f9a7dec209d835462aa1adc09 Pull locking updates from Ingo Molnar: - Introduce local{,64}_try_cmpxchg() - a slightly more optimal primitive, which will be used in perf events ring-buffer code - Simplify/modify rwsems on PREEMPT_RT, to address writer starvation - Misc cleanups/fixes * tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/atomic: Correct (cmp)xchg() instrumentation locking/x86: Define arch_try_cmpxchg_local() locking/arch: Wire up local_try_cmpxchg() locking/generic: Wire up local{,64}_try_cmpxchg() locking/atomic: Add generic try_cmpxchg{,64}_local() support locking/rwbase: Mitigate indefinite writer starvation locking/arch: Rename all internal __xchg() names to __arch_xchg() 
Pull locking updates from Ingo Molnar:

 - Introduce local{,64}_try_cmpxchg() - a slightly more optimal
   primitive, which will be used in perf events ring-buffer code

 - Simplify/modify rwsems on PREEMPT_RT, to address writer starvation

 - Misc cleanups/fixes

* tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/atomic: Correct (cmp)xchg() instrumentation
  locking/x86: Define arch_try_cmpxchg_local()
  locking/arch: Wire up local_try_cmpxchg()
  locking/generic: Wire up local{,64}_try_cmpxchg()
  locking/atomic: Add generic try_cmpxchg{,64}_local() support
  locking/rwbase: Mitigate indefinite writer starvation
  locking/arch: Rename all internal __xchg() names to __arch_xchg()
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2023-05-01T19:06:20+00:00 Linus Torvalds torvalds@linux-foundation.org 2023-05-01T19:06:20+00:00 c8c655c34e33544aec9d64b660872ab33c29b5f1 Pull kvm updates from Paolo Bonzini: "s390: - More phys_to_virt conversions - Improvement of AP management for VSIE (nested virtualization) ARM64: - Numerous fixes for the pathological lock inversion issue that plagued KVM/arm64 since... forever. - New framework allowing SMCCC-compliant hypercalls to be forwarded to userspace, hopefully paving the way for some more features being moved to VMMs rather than be implemented in the kernel. - Large rework of the timer code to allow a VM-wide offset to be applied to both virtual and physical counters as well as a per-timer, per-vcpu offset that complements the global one. This last part allows the NV timer code to be implemented on top. - A small set of fixes to make sure that we don't change anything affecting the EL1&0 translation regime just after having having taken an exception to EL2 until we have executed a DSB. This ensures that speculative walks started in EL1&0 have completed. - The usual selftest fixes and improvements. x86: - Optimize CR0.WP toggling by avoiding an MMU reload when TDP is enabled, and by giving the guest control of CR0.WP when EPT is enabled on VMX (VMX-only because SVM doesn't support per-bit controls) - Add CR0/CR4 helpers to query single bits, and clean up related code where KVM was interpreting kvm_read_cr4_bits()'s "unsigned long" return as a bool - Move AMD_PSFD to cpufeatures.h and purge KVM's definition - Avoid unnecessary writes+flushes when the guest is only adding new PTEs - Overhaul .sync_page() and .invlpg() to utilize .sync_page()'s optimizations when emulating invalidations - Clean up the range-based flushing APIs - Revamp the TDP MMU's reaping of Accessed/Dirty bits to clear a single A/D bit using a LOCK AND instead of XCHG, and skip all of the "handle changed SPTE" overhead associated with writing the entire entry - Track the number of "tail" entries in a pte_list_desc to avoid having to walk (potentially) all descriptors during insertion and deletion, which gets quite expensive if the guest is spamming fork() - Disallow virtualizing legacy LBRs if architectural LBRs are available, the two are mutually exclusive in hardware - Disallow writes to immutable feature MSRs (notably PERF_CAPABILITIES) after KVM_RUN, similar to CPUID features - Overhaul the vmx_pmu_caps selftest to better validate PERF_CAPABILITIES - Apply PMU filters to emulated events and add test coverage to the pmu_event_filter selftest - AMD SVM: - Add support for virtual NMIs - Fixes for edge cases related to virtual interrupts - Intel AMX: - Don't advertise XTILE_CFG in KVM_GET_SUPPORTED_CPUID if XTILE_DATA is not being reported due to userspace not opting in via prctl() - Fix a bug in emulation of ENCLS in compatibility mode - Allow emulation of NOP and PAUSE for L2 - AMX selftests improvements - Misc cleanups MIPS: - Constify MIPS's internal callbacks (a leftover from the hardware enabling rework that landed in 6.3) Generic: - Drop unnecessary casts from "void *" throughout kvm_main.c - Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the struct size by 8 bytes on 64-bit kernels by utilizing a padding hole Documentation: - Fix goof introduced by the conversion to rST" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (211 commits) KVM: s390: pci: fix virtual-physical confusion on module unload/load KVM: s390: vsie: clarifications on setting the APCB KVM: s390: interrupt: fix virtual-physical confusion for next alert GISA KVM: arm64: Have kvm_psci_vcpu_on() use WRITE_ONCE() to update mp_state KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init() KVM: selftests: Test the PMU event "Instructions retired" KVM: selftests: Copy full counter values from guest in PMU event filter test KVM: selftests: Use error codes to signal errors in PMU event filter test KVM: selftests: Print detailed info in PMU event filter asserts KVM: selftests: Add helpers for PMC asserts in PMU event filter test KVM: selftests: Add a common helper for the PMU event filter guest code KVM: selftests: Fix spelling mistake "perrmited" -> "permitted" KVM: arm64: vhe: Drop extra isb() on guest exit KVM: arm64: vhe: Synchronise with page table walker on MMU update KVM: arm64: pkvm: Document the side effects of kvm_flush_dcache_to_poc() KVM: arm64: nvhe: Synchronise with page table walker on TLBI KVM: arm64: Handle 32bit CNTPCTSS traps KVM: arm64: nvhe: Synchronise with page table walker on vcpu run KVM: arm64: vgic: Don't acquire its_lock before config_lock KVM: selftests: Add test to verify KVM's supported XCR0 ... 
Pull kvm updates from Paolo Bonzini:
 "s390:

   - More phys_to_virt conversions

   - Improvement of AP management for VSIE (nested virtualization)

  ARM64:

   - Numerous fixes for the pathological lock inversion issue that
     plagued KVM/arm64 since... forever.

   - New framework allowing SMCCC-compliant hypercalls to be forwarded
     to userspace, hopefully paving the way for some more features being
     moved to VMMs rather than be implemented in the kernel.

   - Large rework of the timer code to allow a VM-wide offset to be
     applied to both virtual and physical counters as well as a
     per-timer, per-vcpu offset that complements the global one. This
     last part allows the NV timer code to be implemented on top.

   - A small set of fixes to make sure that we don't change anything
     affecting the EL1&0 translation regime just after having having
     taken an exception to EL2 until we have executed a DSB. This
     ensures that speculative walks started in EL1&0 have completed.

   - The usual selftest fixes and improvements.

  x86:

   - Optimize CR0.WP toggling by avoiding an MMU reload when TDP is
     enabled, and by giving the guest control of CR0.WP when EPT is
     enabled on VMX (VMX-only because SVM doesn't support per-bit
     controls)

   - Add CR0/CR4 helpers to query single bits, and clean up related code
     where KVM was interpreting kvm_read_cr4_bits()'s "unsigned long"
     return as a bool

   - Move AMD_PSFD to cpufeatures.h and purge KVM's definition

   - Avoid unnecessary writes+flushes when the guest is only adding new
     PTEs

   - Overhaul .sync_page() and .invlpg() to utilize .sync_page()'s
     optimizations when emulating invalidations

   - Clean up the range-based flushing APIs

   - Revamp the TDP MMU's reaping of Accessed/Dirty bits to clear a
     single A/D bit using a LOCK AND instead of XCHG, and skip all of
     the "handle changed SPTE" overhead associated with writing the
     entire entry

   - Track the number of "tail" entries in a pte_list_desc to avoid
     having to walk (potentially) all descriptors during insertion and
     deletion, which gets quite expensive if the guest is spamming
     fork()

   - Disallow virtualizing legacy LBRs if architectural LBRs are
     available, the two are mutually exclusive in hardware

   - Disallow writes to immutable feature MSRs (notably
     PERF_CAPABILITIES) after KVM_RUN, similar to CPUID features

   - Overhaul the vmx_pmu_caps selftest to better validate
     PERF_CAPABILITIES

   - Apply PMU filters to emulated events and add test coverage to the
     pmu_event_filter selftest

   - AMD SVM:
       - Add support for virtual NMIs
       - Fixes for edge cases related to virtual interrupts

   - Intel AMX:
       - Don't advertise XTILE_CFG in KVM_GET_SUPPORTED_CPUID if
         XTILE_DATA is not being reported due to userspace not opting in
         via prctl()
       - Fix a bug in emulation of ENCLS in compatibility mode
       - Allow emulation of NOP and PAUSE for L2
       - AMX selftests improvements
       - Misc cleanups

  MIPS:

   - Constify MIPS's internal callbacks (a leftover from the hardware
     enabling rework that landed in 6.3)

  Generic:

   - Drop unnecessary casts from "void *" throughout kvm_main.c

   - Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the
     struct size by 8 bytes on 64-bit kernels by utilizing a padding
     hole

  Documentation:

   - Fix goof introduced by the conversion to rST"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (211 commits)
  KVM: s390: pci: fix virtual-physical confusion on module unload/load
  KVM: s390: vsie: clarifications on setting the APCB
  KVM: s390: interrupt: fix virtual-physical confusion for next alert GISA
  KVM: arm64: Have kvm_psci_vcpu_on() use WRITE_ONCE() to update mp_state
  KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init()
  KVM: selftests: Test the PMU event "Instructions retired"
  KVM: selftests: Copy full counter values from guest in PMU event filter test
  KVM: selftests: Use error codes to signal errors in PMU event filter test
  KVM: selftests: Print detailed info in PMU event filter asserts
  KVM: selftests: Add helpers for PMC asserts in PMU event filter test
  KVM: selftests: Add a common helper for the PMU event filter guest code
  KVM: selftests: Fix spelling mistake "perrmited" -> "permitted"
  KVM: arm64: vhe: Drop extra isb() on guest exit
  KVM: arm64: vhe: Synchronise with page table walker on MMU update
  KVM: arm64: pkvm: Document the side effects of kvm_flush_dcache_to_poc()
  KVM: arm64: nvhe: Synchronise with page table walker on TLBI
  KVM: arm64: Handle 32bit CNTPCTSS traps
  KVM: arm64: nvhe: Synchronise with page table walker on vcpu run
  KVM: arm64: vgic: Don't acquire its_lock before config_lock
  KVM: selftests: Add test to verify KVM's supported XCR0
  ...
Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux 2023-04-30T00:29:39+00:00 Linus Torvalds torvalds@linux-foundation.org 2023-04-30T00:29:39+00:00 e81507acdc19d91df4121f409871f3e4e055f6c2 Pull clk updates from Stephen Boyd: "Nothing looks out of the ordinary in this batch of clk driver updates. There are a couple patches to the core clk framework, but they're all basically cleanups or debugging aids. The driver updates and new additions are dominated in the diffstat by Qualcomm and MediaTek drivers. Qualcomm gained a handful of new drivers for various SoCs, and MediaTek gained a bunch of drivers for MT8188. The MediaTek drivers are being modernized as well, so there are updates all over that vendor's clk drivers. There's also a couple other new clk drivers in here, for example the Starfive JH7110 SoC support is added. Outside of the two major SoC vendors though, we have the usual collection of non-critical fixes and cleanups to various clk drivers. It's good to see that we're getting more cleanups and modernization patches. Maybe one day we'll be able to properly split clk providers from clk consumers. Core: - Print an informational message before disabling unused clks New Drivers: - BCM63268 timer clock and reset controller - Frequency Hopping (FHCTL) on MediaTek MT6795, MT8173, MT8192 and MT8195 SoCs - Mediatek MT8188 SoC clk drivers - Clock driver for Sunplus SP7021 SoC - Clk driver support for Loongson-2 SoCs - Clock driver for Skyworks Si521xx I2C PCIe clock generators - Initial Starfive JH7110 clk/reset support - Global clock controller drivers for Qualcomm SM7150, IPQ9574, MSM8917 and IPQ5332 SoCs - GPU clock controller drivers for SM6115, SM6125, SM6375 and SA8775P SoCs Updates: - Shrink size of clk_fractional_divider a little - Convert various clk drivers to devm_of_clk_add_hw_provider() - Convert platform clk drivers to remove_new() - Converted most Mediatek clock drivers to struct platform_driver - MediaTek clock drivers can be built as modules - Reimplement Loongson-1 clk driver with DT support - Migrate socfpga clk driver to of_clk_add_hw_provider() - Support for i3c clks on Aspeed ast2600 SoCs - Add clock generic devm_clk_hw_register_gate_parent_data - Add audiomix block control for i.MX8MP - Add support for determine_rate to i.MX composite-8m - Let the LCDIF Pixel clock of i.MX8MM and i.MX8MN set parent rate - Provide clock name in error message for clk-gpr-mux on get parent failure - Drop duplicate imx_clk_mux_flags macro - Register the i.MX8MP Media Disp2 Pix clock as bus clock - Add Media LDB root clock to i.MX8MP - Make i.MX8MP nand_usdhc_bus clock as non-critical - Fix the rate table for i.MX fracn-gppll - Disable HW control for the fracn-gppll in order to be controlled by register write - Add support for interger PLL in fracn-gppll - Add mcore_booted module parameter to i.MX93 provider - Add NIC, A55 and ARM PLL clocks to i.MX93 - Fix i.MX8ULP XBAR_DIVBUS and AD_SLOW clock parents - Use "divider closest" clock type for PLL4_PFD dividers on i.MX8ULP to get more accurate clock rates - Mark the MU0_Bi and TPM5 clocks on i.MX8ULP as critical - Update some of the i.MX critical clocks flags to allow glitchless on-the-fly rate change. - Add I2C5 clock on Renesas R-Car V3H - Exynos850: Add CMU_G3D clock controller for the Mali GPU - Extract Exynos5433 (ARM64) clock controller power management code to common driver parts - Exynos850: make PMU_ALIVE_PCLK clock critical - Add Audio, thermal, camera (CSI-2), Image Signal Processor/Channel Selector (ISPCS), and video capture (VIN) clocks on Renesas R-Car V4H - Add video capture (VIN) clocks on Renesas R-Car V3H - Add Cortex-A53 System CPU (Z2) clocks on Renesas R-Car V3M and V3H - Support for Stromer Plus PLL on Qualcomm IPQ5332 - Add a missing reset to Qualcomm QCM2290 - Migrate Qualcomm IPQ4019 to clk_parent_data - Make USB GDSCs enter retention state when disabled on Qualcomm SM6375, MSM8996 and MSM8998 SoCs - Set floor rounding clk_ops for Qualcomm QCM2290 SDCC2 clk - Add two EMAC GDSCs on Qualcomm SC8280XP - Use shared rcg clk ops in Qualcomm SM6115 GCC - Park Qualcomm SM8350 PCIe PIPE clks when disabled - Add GDSCs to Qualcomm SC7280 LPASS audio clock controller - Add missing XO clocks to Qualcomm MSM8226 and MSM8974 - Convert some Qualcomm clk DT bindings to YAML - Reparenting fix for the clock supplying camera modules on Rockchip rk3399 - Mark more critical (bus-)clocks on Rockchip rk3588" * tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (290 commits) clk: qcom: gcc-sc8280xp: Add EMAC GDSCs clk: starfive: Delete the redundant dev_set_drvdata() in JH7110 clock drivers clk: rockchip: rk3588: make gate linked clocks critical clk: qcom: dispcc-qcm2290: Remove inexistent DSI1PHY clk clk: qcom: add the GPUCC driver for sa8775p dt-bindings: clock: qcom: describe the GPUCC clock for SA8775P clk: qcom: gcc-sm8350: fix PCIe PIPE clocks handling clk: qcom: lpassaudiocc-sc7280: Add required gdsc power domain clks in lpass_cc_sc7280_desc clk: qcom: lpasscc-sc7280: Skip qdsp6ss clock registration dt-bindings: clock: qcom,sc7280-lpasscc: Add qcom,adsp-pil-mode property clk: starfive: Avoid casting iomem pointers clk: microchip: fix potential UAF in auxdev release callback clk: qcom: rpm: Use managed `of_clk_add_hw_provider()` clk: mediatek: fhctl: Mark local variables static clk: sifive: make SiFive clk drivers depend on ARCH_ symbols clk: uniphier: Use managed `of_clk_add_hw_provider()` clk: si5351: Use managed `of_clk_add_hw_provider()` clk: si570: Use managed `of_clk_add_hw_provider()` clk: si514: Use managed `of_clk_add_hw_provider()` clk: lmk04832: Use managed `of_clk_add_hw_provider()` ... 
Pull clk updates from Stephen Boyd:
 "Nothing looks out of the ordinary in this batch of clk driver updates.

  There are a couple patches to the core clk framework, but they're all
  basically cleanups or debugging aids. The driver updates and new
  additions are dominated in the diffstat by Qualcomm and MediaTek
  drivers. Qualcomm gained a handful of new drivers for various SoCs,
  and MediaTek gained a bunch of drivers for MT8188. The MediaTek
  drivers are being modernized as well, so there are updates all over
  that vendor's clk drivers. There's also a couple other new clk drivers
  in here, for example the Starfive JH7110 SoC support is added.

  Outside of the two major SoC vendors though, we have the usual
  collection of non-critical fixes and cleanups to various clk drivers.
  It's good to see that we're getting more cleanups and modernization
  patches. Maybe one day we'll be able to properly split clk providers
  from clk consumers.

  Core:
   - Print an informational message before disabling unused clks

  New Drivers:
   - BCM63268 timer clock and reset controller
   - Frequency Hopping (FHCTL) on MediaTek MT6795, MT8173, MT8192 and
     MT8195 SoCs
   - Mediatek MT8188 SoC clk drivers
   - Clock driver for Sunplus SP7021 SoC
   - Clk driver support for Loongson-2 SoCs
   - Clock driver for Skyworks Si521xx I2C PCIe clock generators
   - Initial Starfive JH7110 clk/reset support
   - Global clock controller drivers for Qualcomm SM7150, IPQ9574,
     MSM8917 and IPQ5332 SoCs
   - GPU clock controller drivers for SM6115, SM6125, SM6375 and SA8775P
     SoCs

  Updates:
   - Shrink size of clk_fractional_divider a little
   - Convert various clk drivers to devm_of_clk_add_hw_provider()
   - Convert platform clk drivers to remove_new()
   - Converted most Mediatek clock drivers to struct platform_driver
   - MediaTek clock drivers can be built as modules
   - Reimplement Loongson-1 clk driver with DT support
   - Migrate socfpga clk driver to of_clk_add_hw_provider()
   - Support for i3c clks on Aspeed ast2600 SoCs
   - Add clock generic devm_clk_hw_register_gate_parent_data
   - Add audiomix block control for i.MX8MP
   - Add support for determine_rate to i.MX composite-8m
   - Let the LCDIF Pixel clock of i.MX8MM and i.MX8MN set parent rate
   - Provide clock name in error message for clk-gpr-mux on get parent
     failure
   - Drop duplicate imx_clk_mux_flags macro
   - Register the i.MX8MP Media Disp2 Pix clock as bus clock
   - Add Media LDB root clock to i.MX8MP
   - Make i.MX8MP nand_usdhc_bus clock as non-critical
   - Fix the rate table for i.MX fracn-gppll
   - Disable HW control for the fracn-gppll in order to be controlled by
     register write
   - Add support for interger PLL in fracn-gppll
   - Add mcore_booted module parameter to i.MX93 provider
   - Add NIC, A55 and ARM PLL clocks to i.MX93
   - Fix i.MX8ULP XBAR_DIVBUS and AD_SLOW clock parents
   - Use "divider closest" clock type for PLL4_PFD dividers on i.MX8ULP
     to get more accurate clock rates
   - Mark the MU0_Bi and TPM5 clocks on i.MX8ULP as critical
   - Update some of the i.MX critical clocks flags to allow glitchless
     on-the-fly rate change.
   - Add I2C5 clock on Renesas R-Car V3H
   - Exynos850: Add CMU_G3D clock controller for the Mali GPU
   - Extract Exynos5433 (ARM64) clock controller power management code
     to common driver parts
   - Exynos850: make PMU_ALIVE_PCLK clock critical
   - Add Audio, thermal, camera (CSI-2), Image Signal Processor/Channel
     Selector (ISPCS), and video capture (VIN) clocks on Renesas R-Car
     V4H
   - Add video capture (VIN) clocks on Renesas R-Car V3H
   - Add Cortex-A53 System CPU (Z2) clocks on Renesas R-Car V3M and V3H
   - Support for Stromer Plus PLL on Qualcomm IPQ5332
   - Add a missing reset to Qualcomm QCM2290
   - Migrate Qualcomm IPQ4019 to clk_parent_data
   - Make USB GDSCs enter retention state when disabled on Qualcomm
     SM6375, MSM8996 and MSM8998 SoCs
   - Set floor rounding clk_ops for Qualcomm QCM2290 SDCC2 clk
   - Add two EMAC GDSCs on Qualcomm SC8280XP
   - Use shared rcg clk ops in Qualcomm SM6115 GCC
   - Park Qualcomm SM8350 PCIe PIPE clks when disabled
   - Add GDSCs to Qualcomm SC7280 LPASS audio clock controller
   - Add missing XO clocks to Qualcomm MSM8226 and MSM8974
   - Convert some Qualcomm clk DT bindings to YAML
   - Reparenting fix for the clock supplying camera modules on Rockchip
     rk3399
   - Mark more critical (bus-)clocks on Rockchip rk3588"

* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (290 commits)
  clk: qcom: gcc-sc8280xp: Add EMAC GDSCs
  clk: starfive: Delete the redundant dev_set_drvdata() in JH7110 clock drivers
  clk: rockchip: rk3588: make gate linked clocks critical
  clk: qcom: dispcc-qcm2290: Remove inexistent DSI1PHY clk
  clk: qcom: add the GPUCC driver for sa8775p
  dt-bindings: clock: qcom: describe the GPUCC clock for SA8775P
  clk: qcom: gcc-sm8350: fix PCIe PIPE clocks handling
  clk: qcom: lpassaudiocc-sc7280: Add required gdsc power domain clks in lpass_cc_sc7280_desc
  clk: qcom: lpasscc-sc7280: Skip qdsp6ss clock registration
  dt-bindings: clock: qcom,sc7280-lpasscc: Add qcom,adsp-pil-mode property
  clk: starfive: Avoid casting iomem pointers
  clk: microchip: fix potential UAF in auxdev release callback
  clk: qcom: rpm: Use managed `of_clk_add_hw_provider()`
  clk: mediatek: fhctl: Mark local variables static
  clk: sifive: make SiFive clk drivers depend on ARCH_ symbols
  clk: uniphier: Use managed `of_clk_add_hw_provider()`
  clk: si5351: Use managed `of_clk_add_hw_provider()`
  clk: si570: Use managed `of_clk_add_hw_provider()`
  clk: si514: Use managed `of_clk_add_hw_provider()`
  clk: lmk04832: Use managed `of_clk_add_hw_provider()`
  ...
locking/arch: Wire up local_try_cmpxchg() 2023-04-29T07:09:16+00:00 Uros Bizjak ubizjak@gmail.com 2023-04-05T14:17:08+00:00 d994f2c8e2410ebcb928df67baa6f04e29bc9d3e Implement target specific support for local_try_cmpxchg() and local_cmpxchg() using typed C wrappers that call their _local counterpart and provide additional checking of their input arguments. Signed-off-by: Uros Bizjak <ubizjak@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20230405141710.3551-4-ubizjak@gmail.com Cc: Linus Torvalds <torvalds@linux-foundation.org> 
Implement target specific support for local_try_cmpxchg()
and local_cmpxchg() using typed C wrappers that call their
_local counterpart and provide additional checking of
their input arguments.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230405141710.3551-4-ubizjak@gmail.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
locking/arch: Rename all internal __xchg() names to __arch_xchg() 2023-04-29T07:08:44+00:00 Andrzej Hajda andrzej.hajda@intel.com 2023-01-18T15:44:44+00:00 068550631fbe0b7fb41625cea6fb204fdc8cb224 Decrease the probability of this internal facility to be used by driver code. Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Acked-by: Palmer Dabbelt <palmer@rivosinc.com> [riscv] Link: https://lore.kernel.org/r/20230118154450.73842-1-andrzej.hajda@intel.com Cc: Linus Torvalds <torvalds@linux-foundation.org> 
Decrease the probability of this internal facility to be used by
driver code.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Acked-by: Palmer Dabbelt <palmer@rivosinc.com> [riscv]
Link: https://lore.kernel.org/r/20230118154450.73842-1-andrzej.hajda@intel.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Merge tag 'smp-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2023-04-28T22:03:43+00:00 Linus Torvalds torvalds@linux-foundation.org 2023-04-28T22:03:43+00:00 f20730efbd305d42eded761f6fbd9a59d6125228 Pull SMP cross-CPU function-call updates from Ingo Molnar: - Remove diagnostics and adjust config for CSD lock diagnostics - Add a generic IPI-sending tracepoint, as currently there's no easy way to instrument IPI origins: it's arch dependent and for some major architectures it's not even consistently available. * tag 'smp-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: trace,smp: Trace all smp_function_call*() invocations trace: Add trace_ipi_send_cpu() sched, smp: Trace smp callback causing an IPI smp: reword smp call IPI comment treewide: Trace IPIs sent via smp_send_reschedule() irq_work: Trace self-IPIs sent via arch_irq_work_raise() smp: Trace IPIs sent via arch_send_call_function_ipi_mask() sched, smp: Trace IPIs sent via send_call_function_single_ipi() trace: Add trace_ipi_send_cpumask() kernel/smp: Make csdlock_debug= resettable locking/csd_lock: Remove per-CPU data indirection from CSD lock debugging locking/csd_lock: Remove added data from CSD lock debugging locking/csd_lock: Add Kconfig option for csd_debug default 
Pull SMP cross-CPU function-call updates from Ingo Molnar:

 - Remove diagnostics and adjust config for CSD lock diagnostics

 - Add a generic IPI-sending tracepoint, as currently there's no easy
   way to instrument IPI origins: it's arch dependent and for some major
   architectures it's not even consistently available.

* tag 'smp-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  trace,smp: Trace all smp_function_call*() invocations
  trace: Add trace_ipi_send_cpu()
  sched, smp: Trace smp callback causing an IPI
  smp: reword smp call IPI comment
  treewide: Trace IPIs sent via smp_send_reschedule()
  irq_work: Trace self-IPIs sent via arch_irq_work_raise()
  smp: Trace IPIs sent via arch_send_call_function_ipi_mask()
  sched, smp: Trace IPIs sent via send_call_function_single_ipi()
  trace: Add trace_ipi_send_cpumask()
  kernel/smp: Make csdlock_debug= resettable
  locking/csd_lock: Remove per-CPU data indirection from CSD lock debugging
  locking/csd_lock: Remove added data from CSD lock debugging
  locking/csd_lock: Add Kconfig option for csd_debug default
Merge tag 'objtool-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2023-04-28T21:02:54+00:00 Linus Torvalds torvalds@linux-foundation.org 2023-04-28T21:02:54+00:00 2aff7c706c7483f4895ca250c92c1d71e45b6e82 Pull objtool updates from Ingo Molnar: - Mark arch_cpu_idle_dead() __noreturn, make all architectures & drivers that did this inconsistently follow this new, common convention, and fix all the fallout that objtool can now detect statically - Fix/improve the ORC unwinder becoming unreliable due to UNWIND_HINT_EMPTY ambiguity, split it into UNWIND_HINT_END_OF_STACK and UNWIND_HINT_UNDEFINED to resolve it - Fix noinstr violations in the KCSAN code and the lkdtm/stackleak code - Generate ORC data for __pfx code - Add more __noreturn annotations to various kernel startup/shutdown and panic functions - Misc improvements & fixes * tag 'objtool-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits) x86/hyperv: Mark hv_ghcb_terminate() as noreturn scsi: message: fusion: Mark mpt_halt_firmware() __noreturn x86/cpu: Mark {hlt,resume}_play_dead() __noreturn btrfs: Mark btrfs_assertfail() __noreturn objtool: Include weak functions in global_noreturns check cpu: Mark nmi_panic_self_stop() __noreturn cpu: Mark panic_smp_self_stop() __noreturn arm64/cpu: Mark cpu_park_loop() and friends __noreturn x86/head: Mark *_start_kernel() __noreturn init: Mark start_kernel() __noreturn init: Mark [arch_call_]rest_init() __noreturn objtool: Generate ORC data for __pfx code x86/linkage: Fix padding for typed functions objtool: Separate prefix code from stack validation code objtool: Remove superfluous dead_end_function() check objtool: Add symbol iteration helpers objtool: Add WARN_INSN() scripts/objdump-func: Support multiple functions context_tracking: Fix KCSAN noinstr violation objtool: Add stackleak instrumentation to uaccess safe list ... 
Pull objtool updates from Ingo Molnar:

 - Mark arch_cpu_idle_dead() __noreturn, make all architectures &
   drivers that did this inconsistently follow this new, common
   convention, and fix all the fallout that objtool can now detect
   statically

 - Fix/improve the ORC unwinder becoming unreliable due to
   UNWIND_HINT_EMPTY ambiguity, split it into UNWIND_HINT_END_OF_STACK
   and UNWIND_HINT_UNDEFINED to resolve it

 - Fix noinstr violations in the KCSAN code and the lkdtm/stackleak code

 - Generate ORC data for __pfx code

 - Add more __noreturn annotations to various kernel startup/shutdown
   and panic functions

 - Misc improvements & fixes

* tag 'objtool-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits)
  x86/hyperv: Mark hv_ghcb_terminate() as noreturn
  scsi: message: fusion: Mark mpt_halt_firmware() __noreturn
  x86/cpu: Mark {hlt,resume}_play_dead() __noreturn
  btrfs: Mark btrfs_assertfail() __noreturn
  objtool: Include weak functions in global_noreturns check
  cpu: Mark nmi_panic_self_stop() __noreturn
  cpu: Mark panic_smp_self_stop() __noreturn
  arm64/cpu: Mark cpu_park_loop() and friends __noreturn
  x86/head: Mark *_start_kernel() __noreturn
  init: Mark start_kernel() __noreturn
  init: Mark [arch_call_]rest_init() __noreturn
  objtool: Generate ORC data for __pfx code
  x86/linkage: Fix padding for typed functions
  objtool: Separate prefix code from stack validation code
  objtool: Remove superfluous dead_end_function() check
  objtool: Add symbol iteration helpers
  objtool: Add WARN_INSN()
  scripts/objdump-func: Support multiple functions
  context_tracking: Fix KCSAN noinstr violation
  objtool: Add stackleak instrumentation to uaccess safe list
  ...
Merge tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 2023-04-28T02:42:02+00:00 Linus Torvalds torvalds@linux-foundation.org 2023-04-28T02:42:02+00:00 7fa8a8ee9400fe8ec188426e40e481717bc5e924 Pull MM updates from Andrew Morton: - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of switching from a user process to a kernel thread. - More folio conversions from Kefeng Wang, Zhang Peng and Pankaj Raghav. - zsmalloc performance improvements from Sergey Senozhatsky. - Yue Zhao has found and fixed some data race issues around the alteration of memcg userspace tunables. - VFS rationalizations from Christoph Hellwig: - removal of most of the callers of write_one_page() - make __filemap_get_folio()'s return value more useful - Luis Chamberlain has changed tmpfs so it no longer requires swap backing. Use `mount -o noswap'. - Qi Zheng has made the slab shrinkers operate locklessly, providing some scalability benefits. - Keith Busch has improved dmapool's performance, making part of its operations O(1) rather than O(n). - Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd, permitting userspace to wr-protect anon memory unpopulated ptes. - Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive rather than exclusive, and has fixed a bunch of errors which were caused by its unintuitive meaning. - Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature, which causes minor faults to install a write-protected pte. - Vlastimil Babka has done some maintenance work on vma_merge(): cleanups to the kernel code and improvements to our userspace test harness. - Cleanups to do_fault_around() by Lorenzo Stoakes. - Mike Rapoport has moved a lot of initialization code out of various mm/ files and into mm/mm_init.c. - Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for DRM, but DRM doesn't use it any more. - Lorenzo has also coverted read_kcore() and vread() to use iterators and has thereby removed the use of bounce buffers in some cases. - Lorenzo has also contributed further cleanups of vma_merge(). - Chaitanya Prakash provides some fixes to the mmap selftesting code. - Matthew Wilcox changes xfs and afs so they no longer take sleeping locks in ->map_page(), a step towards RCUification of pagefaults. - Suren Baghdasaryan has improved mmap_lock scalability by switching to per-VMA locking. - Frederic Weisbecker has reworked the percpu cache draining so that it no longer causes latency glitches on cpu isolated workloads. - Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig logic. - Liu Shixin has changed zswap's initialization so we no longer waste a chunk of memory if zswap is not being used. - Yosry Ahmed has improved the performance of memcg statistics flushing. - David Stevens has fixed several issues involving khugepaged, userfaultfd and shmem. - Christoph Hellwig has provided some cleanup work to zram's IO-related code paths. - David Hildenbrand has fixed up some issues in the selftest code's testing of our pte state changing. - Pankaj Raghav has made page_endio() unneeded and has removed it. - Peter Xu contributed some rationalizations of the userfaultfd selftests. - Yosry Ahmed has fixed an issue around memcg's page recalim accounting. - Chaitanya Prakash has fixed some arm-related issues in the selftests/mm code. - Longlong Xia has improved the way in which KSM handles hwpoisoned pages. - Peter Xu fixes a few issues with uffd-wp at fork() time. - Stefan Roesch has changed KSM so that it may now be used on a per-process and per-cgroup basis. * tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits) mm,unmap: avoid flushing TLB in batch if PTE is inaccessible shmem: restrict noswap option to initial user namespace mm/khugepaged: fix conflicting mods to collapse_file() sparse: remove unnecessary 0 values from rc mm: move 'mmap_min_addr' logic from callers into vm_unmapped_area() hugetlb: pte_alloc_huge() to replace huge pte_alloc_map() maple_tree: fix allocation in mas_sparse_area() mm: do not increment pgfault stats when page fault handler retries zsmalloc: allow only one active pool compaction context selftests/mm: add new selftests for KSM mm: add new KSM process and sysfs knobs mm: add new api to enable ksm per process mm: shrinkers: fix debugfs file permissions mm: don't check VMA write permissions if the PTE/PMD indicates write permissions migrate_pages_batch: fix statistics for longterm pin retry userfaultfd: use helper function range_in_vma() lib/show_mem.c: use for_each_populated_zone() simplify code mm: correct arg in reclaim_pages()/reclaim_clean_pages_from_list() fs/buffer: convert create_page_buffers to folio_create_buffers fs/buffer: add folio_create_empty_buffers helper ... 
Pull MM updates from Andrew Morton:

 - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
   switching from a user process to a kernel thread.

 - More folio conversions from Kefeng Wang, Zhang Peng and Pankaj
   Raghav.

 - zsmalloc performance improvements from Sergey Senozhatsky.

 - Yue Zhao has found and fixed some data race issues around the
   alteration of memcg userspace tunables.

 - VFS rationalizations from Christoph Hellwig:
     - removal of most of the callers of write_one_page()
     - make __filemap_get_folio()'s return value more useful

 - Luis Chamberlain has changed tmpfs so it no longer requires swap
   backing. Use `mount -o noswap'.

 - Qi Zheng has made the slab shrinkers operate locklessly, providing
   some scalability benefits.

 - Keith Busch has improved dmapool's performance, making part of its
   operations O(1) rather than O(n).

 - Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd,
   permitting userspace to wr-protect anon memory unpopulated ptes.

 - Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive
   rather than exclusive, and has fixed a bunch of errors which were
   caused by its unintuitive meaning.

 - Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature,
   which causes minor faults to install a write-protected pte.

 - Vlastimil Babka has done some maintenance work on vma_merge():
   cleanups to the kernel code and improvements to our userspace test
   harness.

 - Cleanups to do_fault_around() by Lorenzo Stoakes.

 - Mike Rapoport has moved a lot of initialization code out of various
   mm/ files and into mm/mm_init.c.

 - Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for
   DRM, but DRM doesn't use it any more.

 - Lorenzo has also coverted read_kcore() and vread() to use iterators
   and has thereby removed the use of bounce buffers in some cases.

 - Lorenzo has also contributed further cleanups of vma_merge().

 - Chaitanya Prakash provides some fixes to the mmap selftesting code.

 - Matthew Wilcox changes xfs and afs so they no longer take sleeping
   locks in ->map_page(), a step towards RCUification of pagefaults.

 - Suren Baghdasaryan has improved mmap_lock scalability by switching to
   per-VMA locking.

 - Frederic Weisbecker has reworked the percpu cache draining so that it
   no longer causes latency glitches on cpu isolated workloads.

 - Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig
   logic.

 - Liu Shixin has changed zswap's initialization so we no longer waste a
   chunk of memory if zswap is not being used.

 - Yosry Ahmed has improved the performance of memcg statistics
   flushing.

 - David Stevens has fixed several issues involving khugepaged,
   userfaultfd and shmem.

 - Christoph Hellwig has provided some cleanup work to zram's IO-related
   code paths.

 - David Hildenbrand has fixed up some issues in the selftest code's
   testing of our pte state changing.

 - Pankaj Raghav has made page_endio() unneeded and has removed it.

 - Peter Xu contributed some rationalizations of the userfaultfd
   selftests.

 - Yosry Ahmed has fixed an issue around memcg's page recalim
   accounting.

 - Chaitanya Prakash has fixed some arm-related issues in the
   selftests/mm code.

 - Longlong Xia has improved the way in which KSM handles hwpoisoned
   pages.

 - Peter Xu fixes a few issues with uffd-wp at fork() time.

 - Stefan Roesch has changed KSM so that it may now be used on a
   per-process and per-cgroup basis.

* tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits)
  mm,unmap: avoid flushing TLB in batch if PTE is inaccessible
  shmem: restrict noswap option to initial user namespace
  mm/khugepaged: fix conflicting mods to collapse_file()
  sparse: remove unnecessary 0 values from rc
  mm: move 'mmap_min_addr' logic from callers into vm_unmapped_area()
  hugetlb: pte_alloc_huge() to replace huge pte_alloc_map()
  maple_tree: fix allocation in mas_sparse_area()
  mm: do not increment pgfault stats when page fault handler retries
  zsmalloc: allow only one active pool compaction context
  selftests/mm: add new selftests for KSM
  mm: add new KSM process and sysfs knobs
  mm: add new api to enable ksm per process
  mm: shrinkers: fix debugfs file permissions
  mm: don't check VMA write permissions if the PTE/PMD indicates write permissions
  migrate_pages_batch: fix statistics for longterm pin retry
  userfaultfd: use helper function range_in_vma()
  lib/show_mem.c: use for_each_populated_zone() simplify code
  mm: correct arg in reclaim_pages()/reclaim_clean_pages_from_list()
  fs/buffer: convert create_page_buffers to folio_create_buffers
  fs/buffer: add folio_create_empty_buffers helper
  ...
MIPS: Don't clear _PAGE_SPECIAL in _PAGE_CHG_MASK 2023-04-24T07:48:51+00:00 Henry Willard henry.willard@oracle.com 2023-04-12T21:29:53+00:00 1492c6b1874ac5ed57d8ffef89e2b5c59f804aa8 In the special case where p = mmap(NULL, ALLOC_SIZE, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0); is followed by rc = mprotect(p, ALLOC_SIZE, PROT_NONE); the _PAGE_SPECIAL bit in the page tables will be cleared by mistake and the later unmapped operations will incorrectly modify the struct page for the the zero page. This sequence occurs in the madvise05 test of the Linux Test Project suite of tests. This was discovered while testing an older version of the kernel (5.4.17) on a MIPS device. Unfortunately, support for this device is not available in newer kernels, so I can't test this with the latest Linux kernel code. It looks like the problem exists in newer kernels, but I can't verify it. Except for the LTP test, this sequence of calls is probably not common. Passing it along in the hope it will be useful to someone. Signed-off-by: Henry Willard <henry.willard@oracle.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> 
In the special case where

	p = mmap(NULL, ALLOC_SIZE, PROT_READ,
                MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);

is followed by

	rc = mprotect(p, ALLOC_SIZE, PROT_NONE);

the _PAGE_SPECIAL bit in the page tables will be cleared by
mistake and the later unmapped operations will incorrectly
modify the struct page for the the zero page. This sequence
occurs in the madvise05 test of the Linux Test Project
suite of tests.

This was discovered while testing an older version of the kernel
(5.4.17) on a MIPS device. Unfortunately, support for this device
is not available in newer kernels, so I can't test this with the
latest Linux kernel code. It looks like the problem exists in
newer kernels, but I can't verify it. Except for the LTP test,
this sequence of calls is probably not common.

Passing it along in the hope it will be useful to someone.

Signed-off-by: Henry Willard <henry.willard@oracle.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
MIPS: Sink body of check_bugs_early() into its only call site 2023-04-22T21:29:00+00:00 Nathan Chancellor nathan@kernel.org 2023-04-21T16:11:27+00:00 f4670a1b30f886e843258ca4a69c442811a90302 If check_bugs_early() is not inlined, which a compiler is free to do after commit ac7c3e4ff401 ("compiler: enable CONFIG_OPTIMIZE_INLINING forcibly"), modpost would warn that check_bugs_early(), a non-init function, refers to check_bugs64_early(), which is marked __init. This would not result in any run time issues, as check_bugs_early() is only called from setup_arch(), which is marked __init. To avoid this potential warning, just sink the body of check_bugs_early() into its single call site in setup_arch(). Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> 
If check_bugs_early() is not inlined, which a compiler is free to do
after commit ac7c3e4ff401 ("compiler: enable CONFIG_OPTIMIZE_INLINING
forcibly"), modpost would warn that check_bugs_early(), a non-init
function, refers to check_bugs64_early(), which is marked __init. This
would not result in any run time issues, as check_bugs_early() is only
called from setup_arch(), which is marked __init.

To avoid this potential warning, just sink the body of
check_bugs_early() into its single call site in setup_arch().

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>