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author | Marc Zyngier <maz@kernel.org> | 2021-10-17 15:42:25 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-11 14:11:51 +0300 |
commit | 7ae8127e412361025e7b4a0e6347ca9e8f3ed109 (patch) | |
tree | d567d414695732846bff73b9af3745cc90ac66e1 /Documentation/arm64/elf_hwcaps.rst | |
parent | b19eaa004f2eeae94a4fcf5f0cadac35cc579a72 (diff) | |
download | linux-7ae8127e412361025e7b4a0e6347ca9e8f3ed109.tar.xz |
arm64: Add HWCAP for self-synchronising virtual counter
commit fee29f008aa3f2aff01117f28b57b1145d92cb9b upstream.
Since userspace can make use of the CNTVSS_EL0 instruction, expose
it via a HWCAP.
Suggested-by: Will Deacon <will@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211017124225.3018098-18-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/arm64/elf_hwcaps.rst')
-rw-r--r-- | Documentation/arm64/elf_hwcaps.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/arm64/elf_hwcaps.rst b/Documentation/arm64/elf_hwcaps.rst index bbd9cf54db6c..95e66bd7dd17 100644 --- a/Documentation/arm64/elf_hwcaps.rst +++ b/Documentation/arm64/elf_hwcaps.rst @@ -245,6 +245,10 @@ HWCAP2_MTE Functionality implied by ID_AA64PFR1_EL1.MTE == 0b0010, as described by Documentation/arm64/memory-tagging-extension.rst. +HWCAP2_ECV + + Functionality implied by ID_AA64MMFR0_EL1.ECV == 0b0001. + 4. Unused AT_HWCAP bits ----------------------- |