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Diffstat (limited to 'Documentation/arm64/elf_hwcaps.rst')
| -rw-r--r-- | Documentation/arm64/elf_hwcaps.rst | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/Documentation/arm64/elf_hwcaps.rst b/Documentation/arm64/elf_hwcaps.rst index 6fed84f935df..83e57e4d38e2 100644 --- a/Documentation/arm64/elf_hwcaps.rst +++ b/Documentation/arm64/elf_hwcaps.rst @@ -14,7 +14,7 @@ Some hardware or software features are only available on some CPU implementations, and/or with certain kernel configurations, but have no architected discovery mechanism available to userspace code at EL0. The kernel exposes the presence of these features to userspace through a set -of flags called hwcaps, exposed in the auxilliary vector. +of flags called hwcaps, exposed in the auxiliary vector. Userspace software can test for features by acquiring the AT_HWCAP or AT_HWCAP2 entry of the auxiliary vector, and testing whether the relevant @@ -284,6 +284,24 @@ HWCAP2_RPRFM HWCAP2_SVE2P1 Functionality implied by ID_AA64ZFR0_EL1.SVEver == 0b0010. +HWCAP2_SME2 + Functionality implied by ID_AA64SMFR0_EL1.SMEver == 0b0001. + +HWCAP2_SME2P1 + Functionality implied by ID_AA64SMFR0_EL1.SMEver == 0b0010. + +HWCAP2_SMEI16I32 + Functionality implied by ID_AA64SMFR0_EL1.I16I32 == 0b0101 + +HWCAP2_SMEBI32I32 + Functionality implied by ID_AA64SMFR0_EL1.BI32I32 == 0b1 + +HWCAP2_SMEB16B16 + Functionality implied by ID_AA64SMFR0_EL1.B16B16 == 0b1 + +HWCAP2_SMEF16F16 + Functionality implied by ID_AA64SMFR0_EL1.F16F16 == 0b1 + 4. Unused AT_HWCAP bits ----------------------- |