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Message-ID: <aIOXyQG1OA8pv49m@arm.com> Date: Fri, 25 Jul 2025 15:42:17 +0100 From: Catalin Marinas <cmarinas@...nel.org> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Will Deacon <will@...nel.org>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [GIT PULL] arm64 updates for 6.17 On Fri, Jul 25, 2025 at 03:39:25PM +0100, Catalin Marinas wrote: > Please pull the arm64 updates below. A quick summary - perf support for > Branch Record Buffer Extensions (BRBE), typical PMU hardware updates, > small additions to MTE for store-only tag checking and exposing > non-address bits to signal handlers, HAVE_LIVEPATCH enabled on arm64, > VMAP_STACK forced on. There is also a TLBI optimisation on hardware that > does not require break-before-make when changing the user PTEs between > contiguous and non-contiguous. These patches touch the iommu/SMMU code. > More details in the tag. I forgot to send the original with my kernel.org address, in case it ends up in your spam folder. So, here it is. > Thanks. > > The following changes since commit ef8923e6c051a98164c2889db943df9695a39888: > > arm64: efi: Fix KASAN false positive for EFI runtime stack (2025-07-04 14:47:06 +0100) > > are available in the Git repository at: > > git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux tags/arm64-upstream > > for you to fetch changes up to 5b1ae9de71335865d06ff0e60eadcf368a735edf: > > Merge branch 'for-next/feat_mte_store_only' into for-next/core (2025-07-24 16:03:34 +0100) > > ---------------------------------------------------------------- > arm64 updates for 6.17: > > Perf and PMU updates: > > - Add support for new (v3) Hisilicon SLLC and DDRC PMUs > > - Add support for Arm-NI PMU integrations that share interrupts between > clock domains within a given instance > > - Allow SPE to be configured with a lower sample period than the > minimum recommendation advertised by PMSIDR_EL1.Interval > > - Add suppport for Arm's "Branch Record Buffer Extension" (BRBE) > > - Adjust the perf watchdog period according to cpu frequency changes > > - Minor driver fixes and cleanups > > Hardware features: > > - Support for MTE store-only checking (FEAT_MTE_STORE_ONLY) > > - Support for reporting the non-address bits during a synchronous MTE > tag check fault (FEAT_MTE_TAGGED_FAR) > > - Optimise the TLBI when folding/unfolding contiguous PTEs on hardware > with FEAT_BBM (break-before-make) level 2 and no TLB conflict aborts > > Software features: > > - Enable HAVE_LIVEPATCH after implementing arch_stack_walk_reliable() > and using the text-poke API for late module relocations > > - Force VMAP_STACK always on and change arm64_efi_rt_init() to use > arch_alloc_vmap_stack() in order to avoid KASAN false positives > > ACPI: > > - Improve SPCR handling and messaging on systems lacking an SPCR table > > Debug: > > - Simplify the debug exception entry path > > - Drop redundant DBG_MDSCR_* macros > > Kselftests: > > - Cleanups and improvements for SME, SVE and FPSIMD tests > > Miscellaneous: > > - Optimise loop to reduce redundant operations in contpte_ptep_get() > > - Remove ISB when resetting POR_EL0 during signal handling > > - Mark the kernel as tainted on SEA and SError panic > > - Remove redundant gcs_free() call > > ---------------------------------------------------------------- > Ada Couprie Diaz (13): > arm64: debug: clean up single_step_handler logic > arm64: refactor aarch32_break_handler() > arm64: debug: call software breakpoint handlers statically > arm64: debug: call step handlers statically > arm64: debug: remove break/step handler registration infrastructure > arm64: entry: Add entry and exit functions for debug exceptions > arm64: debug: split hardware breakpoint exception entry > arm64: debug: refactor reinstall_suspended_bps() > arm64: debug: split single stepping exception entry > arm64: debug: split hardware watchpoint exception entry > arm64: debug: split brk64 exception entry > arm64: debug: split bkpt32 exception entry > arm64: debug: remove debug exception registration infrastructure > > Alok Tiwari (3): > perf/cxlpmu: Fix devm_kcalloc() argument order in cxl_pmu_probe() > perf/cxlpmu: Remove unintended newline from IRQ name format string > perf/cxlpmu: Fix typos in cxl_pmu.c comments and documentation > > Anshuman Khandual (6): > arm64/debug: Drop redundant DBG_MDSCR_* macros > KVM: selftests: Change MDSCR_EL1 register holding variables as uint64_t > arm64/sysreg: Add BRBE registers and fields > arm64: Handle BRBE booting requirements > KVM: arm64: nvhe: Disable branch generation in nVHE guests > arm64/mm: Drop redundant addr increment in set_huge_pte_at() > > Breno Leitao (9): > arm64: Mandate VMAP_STACK > arm64: efi: Remove CONFIG_VMAP_STACK check > arm64: Remove CONFIG_VMAP_STACK conditionals from THREAD_SHIFT and THREAD_ALIGN > arm64: remove CONFIG_VMAP_STACK conditionals from irq stack setup > arm64: remove CONFIG_VMAP_STACK conditionals from traps overflow stack > arm64: remove CONFIG_VMAP_STACK checks from stacktrace overflow logic > arm64: remove CONFIG_VMAP_STACK checks from SDEI stack handling > arm64: remove CONFIG_VMAP_STACK checks from entry code > arm64: Mark kernel as tainted on SAE and SError panic > > Catalin Marinas (4): > arm64: cpufeature: Introduce MATCH_ALL_EARLY_CPUS capability type > arm64: Kconfig: Keep selects somewhat alphabetically ordered > Merge branches 'for-next/livepatch', 'for-next/user-contig-bbml2', 'for-next/misc', 'for-next/acpi', 'for-next/debug-entry', 'for-next/feat_mte_tagged_far', 'for-next/kselftest', 'for-next/mdscr-cleanup' and 'for-next/vmap-stack', remote-tracking branch 'arm64/for-next/perf' into for-next/core > Merge branch 'for-next/feat_mte_store_only' into for-next/core > > Colin Ian King (1): > perf: imx9_perf: make the read-only array mask static const > > Dylan Hatch (1): > arm64/module: Use text-poke API for late relocations. > > Jeremy Linton (1): > arm64/gcs: task_gcs_el0_enable() should use passed task > > Junhao He (5): > drivers/perf: hisi: Simplify the probe process for each DDRC version > drivers/perf: hisi: Add support for HiSilicon DDRC v3 PMU driver > drivers/perf: hisi: Use ACPI driver_data to retrieve SLLC PMU information > drivers/perf: hisi: Add support for HiSilicon SLLC v3 PMU driver > drivers/perf: hisi: Relax the event number check of v2 PMUs > > Kevin Brodsky (1): > arm64: signal: Remove ISB when resetting POR_EL0 > > Leo Yan (1): > perf: arm_spe: Relax period restriction > > Li Chen (2): > ACPI: Return -ENODEV from acpi_parse_spcr() when SPCR support is disabled > ACPI: Suppress misleading SPCR console message when SPCR table is absent > > Mark Brown (11): > kselftest/arm64: Convert tpidr2 test to use kselftest.h > kselftest/arm64: Fix check for setting new VLs in sve-ptrace > kselftest/arm64: Fix test for streaming FPSIMD write in sve-ptrace > kselftest/arm64: Specify SVE data when testing VL set in sve-ptrace > arm64/gcs: Don't call gcs_free() when releasing task_struct > kselftest/arm4: Provide local defines for AT_HWCAP3 > kselftest/arm64: Allow sve-ptrace to run on SME only systems > kselftest/arm64: Test FPSIMD format data writes via NT_ARM_SVE in fp-ptrace > kselftest/arm64: Test SME on SME only systems in fp-ptrace > kselftest/arm64: Fix SVE write data generation for SME only systems > kselftest/arm64: Handle attempts to disable SM on SME only systems > > Mark Rutland (1): > arm64: stacktrace: Check kretprobe_find_ret_addr() return value > > Masahiro Yamada (2): > arm64: pi: use 'targets' instead of extra-y in Makefile > arm64: fix unnecessary rebuilding when CONFIG_DEBUG_EFI=y > > MikoĊaj Lenczewski (3): > arm64: Add BBM Level 2 cpu feature > iommu/arm: Add BBM Level 2 smmu feature > arm64/mm: Elide tlbi in contpte_convert() under BBML2 > > Rob Herring (Arm) (1): > perf: arm_pmuv3: Add support for the Branch Record Buffer Extension (BRBE) > > Robin Murphy (4): > perf/arm-ni: Set initial IRQ affinity > perf/arm-cmn: Reduce stack usage during discovery > perf/arm: Add missing .suppress_bind_attrs > perf/arm-ni: Consolidate CPU affinity handling > > Shouping Wang (1): > perf/arm-ni: Support sharing IRQs within an NI instance > > Song Liu (2): > arm64: stacktrace: Implement arch_stack_walk_reliable() > arm64: Implement HAVE_LIVEPATCH > > Xavier Xia (1): > arm64/mm: Optimize loop to reduce redundant operations of contpte_ptep_get > > Yeoreum Yun (18): > arm64/cpufeature: Add FEAT_MTE_TAGGED_FAR feature > arm64: Report address tag when FEAT_MTE_TAGGED_FAR is supported > KVM: arm64: Expose FEAT_MTE_TAGGED_FAR feature to guest > kselftest/arm64: Add MTE_FAR hwcap test > kselftest/arm64/mte: Register mte signal handler with SA_EXPOSE_TAGBITS > kselftest/arm64/mte: Check MTE_FAR feature is supported > kselftest/arm64/mte: Add address tag related macro and function > kselftest/arm64/mte: Add verification for address tag in signal handler > kselftest/arm64/mte: Refactor check_mmap_option test > kselftest/arm64/mte: Add mtefar tests on check_mmap_options > arm64/cpufeature: Add MTE_STORE_ONLY feature > prctl: Introduce PR_MTE_STORE_ONLY > arm64/kernel: Support store-only mte tag check > arm64/hwcaps: Add MTE_STORE_ONLY hwcaps > KVM: arm64: Expose MTE_STORE_ONLY feature to guest > kselftest/arm64/abi: Add MTE_STORE_ONLY feature hwcap test > kselftest/arm64/mte: Preparation for mte store only test > kselftest/arm64/mte: Add MTE_STORE_ONLY testcases > > Yicong Yang (3): > watchdog/perf: Provide function for adjusting the event period > arm64/watchdog_hld: Add a cpufreq notifier for update watchdog thresh > drivers/perf: hisi: Support PMUs with no interrupt > > Zhiyuan Dai (1): > perf/arm-cmn: Broaden module description for wider interconnect support > > Documentation/arch/arm64/booting.rst | 21 + > Documentation/arch/arm64/elf_hwcaps.rst | 6 + > Documentation/arch/arm64/tagged-pointers.rst | 11 +- > arch/arm64/Kconfig | 4 + > arch/arm64/include/asm/assembler.h | 4 +- > arch/arm64/include/asm/cpufeature.h | 28 + > arch/arm64/include/asm/debug-monitors.h | 40 +- > arch/arm64/include/asm/el2_setup.h | 71 +- > arch/arm64/include/asm/exception.h | 14 +- > arch/arm64/include/asm/gcs.h | 2 +- > arch/arm64/include/asm/hwcap.h | 2 + > arch/arm64/include/asm/kgdb.h | 12 + > arch/arm64/include/asm/kprobes.h | 8 + > arch/arm64/include/asm/kvm_host.h | 2 + > arch/arm64/include/asm/memory.h | 6 +- > arch/arm64/include/asm/processor.h | 2 + > arch/arm64/include/asm/stacktrace.h | 6 +- > arch/arm64/include/asm/sysreg.h | 16 +- > arch/arm64/include/asm/system_misc.h | 4 - > arch/arm64/include/asm/thread_info.h | 5 +- > arch/arm64/include/asm/traps.h | 6 + > arch/arm64/include/asm/uprobes.h | 11 + > arch/arm64/include/uapi/asm/hwcap.h | 2 + > arch/arm64/kernel/Makefile | 2 +- > arch/arm64/kernel/acpi.c | 10 +- > arch/arm64/kernel/cpufeature.c | 116 ++- > arch/arm64/kernel/cpuinfo.c | 2 + > arch/arm64/kernel/debug-monitors.c | 277 +++---- > arch/arm64/kernel/efi.c | 5 - > arch/arm64/kernel/entry-common.c | 156 +++- > arch/arm64/kernel/entry.S | 6 - > arch/arm64/kernel/hw_breakpoint.c | 60 +- > arch/arm64/kernel/irq.c | 13 - > arch/arm64/kernel/kgdb.c | 39 +- > arch/arm64/kernel/module.c | 101 ++- > arch/arm64/kernel/mte.c | 11 +- > arch/arm64/kernel/pi/Makefile | 2 +- > arch/arm64/kernel/probes/kprobes.c | 31 +- > arch/arm64/kernel/probes/kprobes_trampoline.S | 2 +- > arch/arm64/kernel/probes/uprobes.c | 24 +- > arch/arm64/kernel/process.c | 13 +- > arch/arm64/kernel/sdei.c | 8 +- > arch/arm64/kernel/signal.c | 7 +- > arch/arm64/kernel/stacktrace.c | 59 +- > arch/arm64/kernel/traps.c | 84 +- > arch/arm64/kernel/watchdog_hld.c | 58 ++ > arch/arm64/kvm/debug.c | 4 + > arch/arm64/kvm/hyp/nvhe/debug-sr.c | 32 + > arch/arm64/kvm/hyp/nvhe/switch.c | 2 +- > arch/arm64/kvm/sys_regs.c | 11 +- > arch/arm64/mm/contpte.c | 211 ++++- > arch/arm64/mm/fault.c | 83 +- > arch/arm64/mm/gcs.c | 6 - > arch/arm64/mm/hugetlbpage.c | 2 +- > arch/arm64/mm/proc.S | 2 +- > arch/arm64/tools/cpucaps | 3 + > arch/arm64/tools/sysreg | 132 +++ > drivers/firmware/efi/libstub/Makefile.zboot | 2 +- > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 3 + > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 + > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 2 + > drivers/perf/Kconfig | 11 + > drivers/perf/Makefile | 1 + > drivers/perf/arm-cmn.c | 20 +- > drivers/perf/arm-ni.c | 153 ++-- > drivers/perf/arm_brbe.c | 805 +++++++++++++++++++ > drivers/perf/arm_brbe.h | 47 ++ > drivers/perf/arm_pmu.c | 16 +- > drivers/perf/arm_pmuv3.c | 107 ++- > drivers/perf/arm_spe_pmu.c | 18 +- > drivers/perf/cxl_pmu.c | 12 +- > drivers/perf/fsl_imx9_ddr_perf.c | 8 +- > drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 354 ++++---- > drivers/perf/hisilicon/hisi_uncore_hha_pmu.c | 6 +- > drivers/perf/hisilicon/hisi_uncore_pa_pmu.c | 2 +- > drivers/perf/hisilicon/hisi_uncore_pmu.c | 11 +- > drivers/perf/hisilicon/hisi_uncore_pmu.h | 2 + > drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c | 220 +++-- > include/linux/acpi.h | 2 +- > include/linux/nmi.h | 2 + > include/linux/perf/arm_pmu.h | 8 + > include/uapi/linux/prctl.h | 2 + > kernel/watchdog_perf.c | 22 + > tools/testing/selftests/arm64/abi/Makefile | 2 +- > tools/testing/selftests/arm64/abi/hwcap.c | 16 + > tools/testing/selftests/arm64/abi/tpidr2.c | 140 +--- > tools/testing/selftests/arm64/fp/fp-ptrace.c | 77 +- > tools/testing/selftests/arm64/fp/sve-ptrace.c | 12 +- > .../selftests/arm64/mte/check_buffer_fill.c | 12 +- > .../selftests/arm64/mte/check_child_memory.c | 8 +- > .../selftests/arm64/mte/check_hugetlb_options.c | 10 +- > .../selftests/arm64/mte/check_ksm_options.c | 6 +- > .../selftests/arm64/mte/check_mmap_options.c | 890 +++++++++++++++++++-- > tools/testing/selftests/arm64/mte/check_prctl.c | 29 +- > .../selftests/arm64/mte/check_tags_inclusion.c | 10 +- > tools/testing/selftests/arm64/mte/check_user_mem.c | 4 +- > .../testing/selftests/arm64/mte/mte_common_util.c | 84 +- > .../testing/selftests/arm64/mte/mte_common_util.h | 9 +- > tools/testing/selftests/arm64/mte/mte_def.h | 8 + > .../testing/selftests/kvm/arm64/debug-exceptions.c | 4 +- > 100 files changed, 3768 insertions(+), 1249 deletions(-) > create mode 100644 drivers/perf/arm_brbe.c > create mode 100644 drivers/perf/arm_brbe.h
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