[GIT PULL] arm64 fixes for -rc2

[Will Deacon]

Hi Linus,

Please pull this batch of arm64 fixes for -rc2. The summary is in the
tag but the diffstat is dominated by changes to our TLB invalidation
errata handling and the introduction of a new GCS selftest to catch one
of the issues that is fixed here relating to PROT_NONE mappings.

There are still a few other issues being worked on, so you can expect
another batch of fixes next week.

Cheers,

Will

--->8

The following changes since commit 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f:

  Linux 7.0-rc1 (2026-02-22 13:18:59 -0800)

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 df6e4ab654dc482c1d45776257a62ac10e14086c:

  arm64: topology: Fix false warning in counters_read_on_cpu() for same-CPU reads (2026-02-26 18:27:15 +0000)

----------------------------------------------------------------
arm64 fixes for -rc2

- Fix cpufreq warning due to attempting a cross-call with interrupts
  masked when reading local AMU counters.

- Fix DEBUG_PREEMPT warning from the delay loop when it tries to access
  per-cpu errata workaround state for the virtual counter.

- Re-jig and optimise our TLB invalidation errata workarounds in
  preparation for more hardware brokenness.

- Fix GCS mappings to interact properly with PROT_NONE and to avoid
  corrupting the pte on CPUs with FEAT_LPA2.

- Fix ioremap_prot() to extract only the memory attributes from the
  user pte and ignore all the other 'prot' bits.

----------------------------------------------------------------
Catalin Marinas (3):
      arm64: gcs: Do not set PTE_SHARED on GCS mappings if FEAT_LPA2 is enabled
      arm64: gcs: Honour mprotect(PROT_NONE) on shadow stack mappings
      kselftest: arm64: Check access to GCS after mprotect(PROT_NONE)

Marc Zyngier (1):
      arm64: Fix sampling the "stable" virtual counter in preemptible section

Mark Rutland (2):
      arm64: tlb: Allow XZR argument to TLBI ops
      arm64: tlb: Optimize ARM64_WORKAROUND_REPEAT_TLBI

Sumit Gupta (1):
      arm64: topology: Fix false warning in counters_read_on_cpu() for same-CPU reads

Will Deacon (2):
      arm64: io: Rename ioremap_prot() to __ioremap_prot()
      arm64: io: Extract user memory type in ioremap_prot()

 arch/arm64/include/asm/io.h                        | 26 ++++++--
 arch/arm64/include/asm/pgtable-prot.h              |  3 -
 arch/arm64/include/asm/tlbflush.h                  | 63 ++++++++++--------
 arch/arm64/kernel/acpi.c                           |  2 +-
 arch/arm64/kernel/sys_compat.c                     |  2 +-
 arch/arm64/kernel/topology.c                       | 21 ++++--
 arch/arm64/kvm/hyp/nvhe/mm.c                       |  2 +-
 arch/arm64/kvm/hyp/nvhe/tlb.c                      |  8 +--
 arch/arm64/kvm/hyp/pgtable.c                       |  2 +-
 arch/arm64/kvm/hyp/vhe/tlb.c                       | 10 +--
 arch/arm64/lib/delay.c                             |  6 +-
 arch/arm64/mm/ioremap.c                            |  6 +-
 arch/arm64/mm/mmap.c                               | 12 +++-
 .../arm64/signal/testcases/gcs_prot_none_fault.c   | 76 ++++++++++++++++++++++
 14 files changed, 179 insertions(+), 60 deletions(-)
 create mode 100644 tools/testing/selftests/arm64/signal/testcases/gcs_prot_none_fault.c