[PATCH 0/8] arm64: Implement support for 2025 dpISA extensions

Mark Brown
2026-03-02T22:59:35Z

The 2025 dpISA extensions introduce a number of architecture features
all of which are fairly straightforward from a kernel point of view
since they only introduce new instructions, not any architecture state.

All the relevant newly added ID registers are already exported by KVM,
all non-RES0 bits in ID_AA64ZFR0_EL1 and ID_AA64FPFR0_EL1 are writable
and the updates to ID_AA64ISARx_EL1 are all additional values in already
exported bitfields.

Signed-off-by: Mark Brown <broonie@kernel.org>
---
Mark Brown (8):
arm64/hwcap: Generate the KERNEL_HWCAP_ definitions for the hwcaps
arm64/sysreg: Update ID_AA64ISAR0_EL1 description to DDI0601 2025-12
arm64/sysreg: Update ID_AA64ISAR2_EL1 description to DDI0601 2025-12
arm64/sysreg: Update ID_AA64FPFR0_EL1 description to DDI0601 2025-12
arm64/sysreg: Update ID_AA64ZFR0_EL1 description to DDI0601 2025-12
arm64/sysreg: Update ID_AA64SMFR0_EL1 description to DDI0601 2025-12
arm64/cpufeature: Define hwcaps for 2025 dpISA features
kselftest/arm64: Add 2025 dpISA coverage to hwcaps

Documentation/arch/arm64/elf_hwcaps.rst | 24 ++++++
arch/arm64/include/asm/hwcap.h | 120 +-----------------------------
arch/arm64/include/uapi/asm/hwcap.h | 8 ++
arch/arm64/kernel/cpufeature.c | 11 +++
arch/arm64/kernel/cpuinfo.c | 8 ++
arch/arm64/tools/Makefile | 8 +-
arch/arm64/tools/gen-kernel-hwcaps.sh | 23 ++++++
arch/arm64/tools/sysreg | 20 ++++-
tools/testing/selftests/arm64/abi/hwcap.c | 116 +++++++++++++++++++++++++++++
9 files changed, 217 insertions(+), 121 deletions(-)
---
base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
change-id: 20260106-arm64-dpisa-2025-d6673ae6acee

Best regards,
--
Mark Brown <broonie@kernel.org>