diff options
| author | Marc Zyngier <maz@kernel.org> | 2022-04-20 13:21:12 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-04-20 13:24:44 +0100 |
| commit | 69bb02ebc38ace438c9cd7c5315cfe43862b51fe (patch) | |
| tree | a40971e4b2c56ea563a3c573a2ad5f606982021f /Documentation/arm64 | |
| parent | bdcc2f280334e4e3f42a5a740494444f1026fb65 (diff) | |
arm64: Add HWCAP advertising FEAT_WFXT
In order to allow userspace to enjoy WFET, add a new HWCAP that
advertises it when available.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220419182755.601427-9-maz@kernel.org
Diffstat (limited to 'Documentation/arm64')
| -rw-r--r-- | Documentation/arm64/cpu-feature-registers.rst | 2 | ||||
| -rw-r--r-- | Documentation/arm64/elf_hwcaps.rst | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/arm64/cpu-feature-registers.rst b/Documentation/arm64/cpu-feature-registers.rst index 749ae970c319..04ba83e1965f 100644 --- a/Documentation/arm64/cpu-feature-registers.rst +++ b/Documentation/arm64/cpu-feature-registers.rst @@ -290,6 +290,8 @@ infrastructure: +------------------------------+---------+---------+ | RPRES | [7-4] | y | +------------------------------+---------+---------+ + | WFXT | [3-0] | y | + +------------------------------+---------+---------+ Appendix I: Example diff --git a/Documentation/arm64/elf_hwcaps.rst b/Documentation/arm64/elf_hwcaps.rst index a8f30963e550..af3ab524e826 100644 --- a/Documentation/arm64/elf_hwcaps.rst +++ b/Documentation/arm64/elf_hwcaps.rst @@ -264,6 +264,10 @@ HWCAP2_MTE3 Functionality implied by ID_AA64PFR1_EL1.MTE == 0b0011, as described by Documentation/arm64/memory-tagging-extension.rst. +HWCAP2_WFXT + + Functionality implied by ID_AA64ISAR2_EL1.WFXT == 0b0010. + 4. Unused AT_HWCAP bits ----------------------- |