[GIT PULL] arm64 fixes for -rc5

From: Will Deacon

Date: Thu Sep 24 2026 - 07:29:50 EST


Hi Linus,

Here is the promised second batch of arm64 fixes. The summary is in the
tag, but it's all spread around a bit. We've also had a couple more
fixes come in overnight, so I'll send you some more next week once
they've had time to sit in -next.

Cheers,

Will

--->8

The following changes since commit fdb9ebc7fb7788b8371fbef6c17dc5c8291e1429:

arm64: mte: Fix PTRACE_{PEEK,POKE}MTETAGS error documentation (2026-09-11 12:50:02 +0000)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git tags/arm64-fixes

for you to fetch changes up to 2bc6b218717b9d08f466f88209251d54bc09b207:

arm64/boot: Disable trapping of PMZR_EL0 writes to EL2 (2026-09-23 12:34:30 +0000)

----------------------------------------------------------------
arm64 fixes for -rc5

- Fix the recently merged user ABI for the Arm CMN PMU driver filtering
logic so that the ordering matches the hardware spec

- Fix spurious warning when attempting to read PROT_NONE mappings of
/dev/mem

- Allow WFxT to be disabled on the command line, which is necessary for
some configurations of recent Apple SoCs

- Fix EL2 fine-grained trap configuration for the CPU PMU

- Fix MIDR matching when applying CPU errata workarounds in a VM

----------------------------------------------------------------
David Carlier (1):
arm64: errata: match the target implementation CPU's own MIDR

Fuad Tabba (1):
arm64/boot: Disable trapping of PMZR_EL0 writes to EL2

Robin Murphy (1):
perf/arm-cmn: Fix multi-filter encoding

Yureka Lilian (1):
arm64: Add override for WFxT

Zeng Heng (1):
arm64: io: Reject non-user protection in ioremap_prot()

Documentation/admin-guide/kernel-parameters.txt | 3 ++
Documentation/arch/arm64/booting.rst | 1 +
arch/arm64/include/asm/el2_setup.h | 9 +++-
arch/arm64/include/asm/io.h | 3 +-
arch/arm64/kernel/cpu_errata.c | 15 ++++---
arch/arm64/kernel/pi/idreg-override.c | 2 +
drivers/perf/arm-cmn.c | 58 +++++++++++++++----------
7 files changed, 59 insertions(+), 32 deletions(-)