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Message-ID: <aYnwpy4umKY4A5wQ@willie-the-truck>
Date: Mon, 9 Feb 2026 14:35:19 +0000
From: Will Deacon <will@...nel.org>
To: torvalds@...ux-foundation.org
Cc: catalin.marinas@....com, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, kernel-team@...roid.com,
maz@...nel.org
Subject: [GIT PULL] arm64 updates for 7.0
Hi Linus,
Please pull these arm64 changes for 7.0. There's a little less than
normal, probably due to LPC & Christmas/New Year meaning that a few
series weren't quite ready or reviewed in time. It's still useful across
the board, despite the only real feature being support for the LS64
feature enabling 64-byte atomic accesses to endpoints that support it.
There's the usual summary in the tag.
Logistics-wise, we ran into a couple of small conflicts in -next. The
first one [1] is against a KVM/ARM fix in your tree (86364832ba6f ("KVM:
arm64: Don't blindly set set PSTATE.PAN on guest exit") which clashes
with the removal of CONFIG_ARM64_PAN in arch/arm64/kvm/hyp/entry.S. The
right fix is to take what we have here so that the line becomes:
ALTERNATIVE(nop, SET_PSTATE_PAN(1), ARM64_HAS_PAN)
kvm_pan_patch_el2_entry() is then unused but is removed by the kvmarm
tree (who share the for-next/cpufeature branch). Marc and I will do a
sweep at -rc1 to remove anything left over.
The second conflict [2] is a trivial MAINTAINERS conflict where Catalin
and I have been added to the "ACPI FOR ARM64 (ACPI/arm64)" entry but
Sudeep has changed his email address in the context.
The only unusual part of the diffstat is the single-line removal of the
unused 'SYSCALL_MAX_ARGS' definition from arch/xtensa, which was part of
a series cleaning up our syscall_get_arguments() implementation and the
maintainers were on cc.
Please pull,
Will
[1] https://lore.kernel.org/r/86h5s8bca4.wl-maz@kernel.org
[2] https://lore.kernel.org/r/aXtqo7r3bSDMNBek@sirena.org.uk
--->8
The following changes since commit 8f0b4cce4481fb22653697cced8d0d04027cb1e8:
Linux 6.19-rc1 (2025-12-14 16:05:07 +1200)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git tags/arm64-upstream
for you to fetch changes up to 36c0de02575ce59dfd879eb4ef63d53a68bbf9ce:
perf/arm-cmn: Reject unsupported hardware configurations (2026-02-03 19:43:52 +0000)
----------------------------------------------------------------
arm64 updates for 7.0
ACPI:
- Add interrupt signalling support to the AGDI handler.
- Add Catalin and myself to the arm64 ACPI MAINTAINERS entry.
CPU features:
- Drop Kconfig options for PAN and LSE (these are detected at runtime).
- Add support for 64-byte single-copy atomic instructions (LS64/LS64V).
- Reduce MTE overhead when executing in the kernel on Ampere CPUs.
- Ensure POR_EL0 value exposed via ptrace is up-to-date.
- Fix error handling on GCS allocation failure.
CPU frequency:
- Add CPU hotplug support to the FIE setup in the AMU driver.
Entry code:
- Minor optimisations and cleanups to the syscall entry path.
- Preparatory rework for moving to the generic syscall entry code.
Hardware errata:
- Work around Spectre-BHB on TSV110 processors.
- Work around broken CMO propagation on some systems with the SI-L1
interconnect.
Miscellaneous:
- Disable branch profiling for arch/arm64/ to avoid issues with noinstr.
- Minor fixes and cleanups (kexec + ubsan, WARN_ONCE() instead of
WARN_ON(), reduction of boolean expression).
- Fix custom __READ_ONCE() implementation for LTO builds when operating
on non-atomic types.
Perf and PMUs:
- Support for CMN-600AE.
- Be stricter about supported hardware in the CMN driver.
- Support for DSU-110 and DSU-120.
- Support for the cycles event in the DSU driver (alongside the
dedicated cycles counter).
- Use IRQF_NO_THREAD instead of IRQF_ONESHOT in the cxlpmu driver.
- Use !bitmap_empty() as a faster alternative to bitmap_weight().
- Fix SPE error handling when failing to resume profiling.
Selftests:
- Add support for the FORCE_TARGETS option to the arm64 kselftests.
- Avoid nolibc-specific my_syscall() function.
- Add basic test for the LS64 HWCAP.
- Extend fp-pidbench to cover additional workload patterns.
----------------------------------------------------------------
Breno Leitao (3):
arm64: Disable branch profiling for all arm64 code
arm64: mm: warn once for ioremap attempts on RAM mappings
arm64/gcs: Fix error handling in arch_set_shadow_stack_status()
Carl Worth (1):
arm64: mte: Set TCMA1 whenever MTE is present in the kernel
Geert Uytterhoeven (1):
arm64: topology: Do not warn on missing AMU in cpuhp_topology_online()
Hanjun Guo (1):
MAINTAINERS: Update the maintainers for ARM64 ACPI
I-Hsin Cheng (1):
kselftest/arm64: Add missing file in .gitignore
Jinjie Ruan (5):
syscall.h: Remove unused SYSCALL_MAX_ARGS
arm64: Avoid memcpy() for syscall_get_arguments()
arm64: Remove unused _TIF_WORK_MASK
arm64/ptrace: Split report_syscall()
arm64/ptrace: Return early for ptrace_report_syscall_entry() error
Jinqian Yang (1):
arm64: Add support for TSV110 Spectre-BHB mitigation
Joey Gouly (1):
arm64: poe: fix stale POR_EL0 values for ptrace
Kazuhiro Abe (1):
ACPI: AGDI: Add interrupt signaling mode support
Leo Yan (1):
perf: arm_spe: Properly set hw.state on failures
Lifeng Zheng (3):
arm64: topology: Skip already covered CPUs when setting freq source
cpufreq: Add new helper function returning cpufreq policy
arm64: topology: Handle AMU FIE setup on CPU hotplug
Lucas Wei (1):
arm64: errata: Workaround for SI L1 downstream coherency issue
Marc Zyngier (4):
arm64: Unconditionally enable LSE support
arm64: Unconditionally enable PAN support
KVM: arm64: Add exit to userspace on {LD,ST}64B* outside of memslots
KVM: arm64: Add documentation for KVM_EXIT_ARM_LDST64B
Marco Elver (1):
arm64: Fix non-atomic __READ_ONCE() with CONFIG_LTO=y
Mark Brown (3):
kselftest/arm64: Support FORCE_TARGETS
kselftest/arm64: Add a no-SVE loop after SVE in fp-pidbench
kselftest/arm64: Raise default number of loops in fp-pidbench
Osama Abdelkader (1):
arm64: simplify arch_uprobe_xol_was_trapped return
Robin Murphy (5):
perf/arm-cmn: Support CMN-600AE
perf/arm_dsu: Support DSU-110
perf/arm_dsu: Support DSU-120
perf/arm_dsu: Allow standard cycles events
perf/arm-cmn: Reject unsupported hardware configurations
Sebastian Andrzej Siewior (1):
perf/cxlpmu: Replace IRQF_ONESHOT with IRQF_NO_THREAD
Thomas Weißschuh (1):
kselftest/arm64: Use syscall() macro over nolibc my_syscall()
Will Deacon (8):
Merge branch 'for-next/acpi' into for-next/core
Merge branch 'for-next/cpufeature' into for-next/core
Merge branch 'for-next/cpufreq' into for-next/core
Merge branch 'for-next/entry' into for-next/core
Merge branch 'for-next/errata' into for-next/core
Merge branch 'for-next/misc' into for-next/core
Merge branch 'for-next/perf' into for-next/core
Merge branch 'for-next/selftests' into for-next/core
Yeoreum Yun (1):
arm64: kernel: initialize missing kexec_buf->random field
Yicong Yang (5):
KVM: arm64: Handle DABT caused by LS64* instructions on unsupported memory
arm64: Provide basic EL2 setup for FEAT_{LS64, LS64_V} usage at EL0/1
KVM: arm64: Enable FEAT_{LS64, LS64_V} in the supported guest
arm64: Add support for FEAT_{LS64, LS64_V}
kselftest/arm64: Add HWCAP test for FEAT_LS64
Yury Norov (NVIDIA) (1):
drivers: perf: use bitmap_empty() where appropriate
Documentation/arch/arm64/booting.rst | 12 +++
Documentation/arch/arm64/elf_hwcaps.rst | 7 ++
Documentation/arch/arm64/silicon-errata.rst | 1 +
Documentation/virt/kvm/api.rst | 43 +++++++++--
MAINTAINERS | 2 +
arch/arm/include/asm/syscall.h | 2 -
arch/arm64/Kbuild | 4 +
arch/arm64/Kconfig | 52 +++++--------
arch/arm64/include/asm/assembler.h | 10 +++
arch/arm64/include/asm/cpucaps.h | 2 -
arch/arm64/include/asm/el2_setup.h | 12 ++-
arch/arm64/include/asm/esr.h | 8 ++
arch/arm64/include/asm/hwcap.h | 1 +
arch/arm64/include/asm/insn.h | 23 ------
arch/arm64/include/asm/kvm_emulate.h | 7 ++
arch/arm64/include/asm/lse.h | 9 ---
arch/arm64/include/asm/rwonce.h | 2 +-
arch/arm64/include/asm/syscall.h | 18 +++--
arch/arm64/include/asm/thread_info.h | 6 --
arch/arm64/include/asm/uaccess.h | 6 +-
arch/arm64/include/uapi/asm/hwcap.h | 1 +
arch/arm64/kernel/cpu_errata.c | 31 ++++++++
arch/arm64/kernel/cpufeature.c | 34 +++++++--
arch/arm64/kernel/cpuinfo.c | 1 +
arch/arm64/kernel/kexec_image.c | 2 +-
arch/arm64/kernel/probes/uprobes.c | 5 +-
arch/arm64/kernel/proton-pack.c | 1 +
arch/arm64/kernel/ptrace.c | 50 ++++++++----
arch/arm64/kernel/topology.c | 66 +++++++++++++++-
arch/arm64/kvm/at.c | 7 --
arch/arm64/kvm/hyp/entry.S | 2 +-
arch/arm64/kvm/inject_fault.c | 34 +++++++++
arch/arm64/kvm/mmio.c | 27 ++++++-
arch/arm64/kvm/mmu.c | 14 +++-
arch/arm64/lib/insn.c | 2 -
arch/arm64/mm/gcs.c | 4 +-
arch/arm64/mm/ioremap.c | 3 +-
arch/arm64/mm/proc.S | 10 +--
arch/arm64/net/bpf_jit_comp.c | 7 --
arch/arm64/tools/cpucaps | 3 +
arch/xtensa/include/asm/syscall.h | 1 -
drivers/acpi/arm64/agdi.c | 101 ++++++++++++++++++++++---
drivers/base/arch_topology.c | 9 ++-
drivers/cpufreq/cpufreq.c | 6 ++
drivers/perf/arm-cmn.c | 19 ++++-
drivers/perf/arm_dsu_pmu.c | 37 +++++----
drivers/perf/arm_spe_pmu.c | 18 +++--
drivers/perf/cxl_pmu.c | 2 +-
drivers/perf/riscv_pmu_sbi.c | 2 +-
drivers/perf/starfive_starlink_pmu.c | 3 +-
include/linux/cpufreq.h | 5 ++
include/uapi/linux/kvm.h | 3 +-
tools/testing/selftests/arm64/Makefile | 6 +-
tools/testing/selftests/arm64/abi/hwcap.c | 49 ++++++++++++
tools/testing/selftests/arm64/abi/tpidr2.c | 3 +-
tools/testing/selftests/arm64/fp/fp-pidbench.S | 6 +-
tools/testing/selftests/arm64/gcs/basic-gcs.c | 40 ++++------
tools/testing/selftests/arm64/mte/.gitignore | 1 +
58 files changed, 628 insertions(+), 214 deletions(-)
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