diff options
| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2018-03-12 10:04:14 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2018-03-19 18:14:27 +0000 |
| commit | 7206dc93a58fb76421c4411eefa3c003337bcb2d (patch) | |
| tree | 9bf4f279e538a41472bf6f5e8e3088645c86f8b0 /Documentation/arm64/elf_hwcaps.txt | |
| parent | 847ecd3fa311cde0f10a1b66c572abb136742b1d (diff) | |
arm64: Expose Arm v8.4 features
Expose the new features introduced by Arm v8.4 extensions to
Arm v8-A profile.
These include :
1) Data indpendent timing of instructions. (DIT, exposed as HWCAP_DIT)
2) Unaligned atomic instructions and Single-copy atomicity of loads
and stores. (AT, expose as HWCAP_USCAT)
3) LDAPR and STLR instructions with immediate offsets (extension to
LRCPC, exposed as HWCAP_ILRCPC)
4) Flag manipulation instructions (TS, exposed as HWCAP_FLAGM).
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Dave Martin <dave.martin@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'Documentation/arm64/elf_hwcaps.txt')
| -rw-r--r-- | Documentation/arm64/elf_hwcaps.txt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt index 57324ee55ecc..d6aff2c5e9e2 100644 --- a/Documentation/arm64/elf_hwcaps.txt +++ b/Documentation/arm64/elf_hwcaps.txt @@ -162,3 +162,19 @@ HWCAP_SVE HWCAP_ASIMDFHM Functionality implied by ID_AA64ISAR0_EL1.FHM == 0b0001. + +HWCAP_DIT + + Functionality implied by ID_AA64PFR0_EL1.DIT == 0b0001. + +HWCAP_USCAT + + Functionality implied by ID_AA64MMFR2_EL1.AT == 0b0001. + +HWCAP_ILRCPC + + Functionality implied by ID_AA64ISR1_EL1.LRCPC == 0b0002. + +HWCAP_FLAGM + + Functionality implied by ID_AA64ISAR0_EL1.TS == 0b0001. |