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authorSuzuki K Poulose <suzuki.poulose@arm.com>2017-10-11 16:01:02 +0300
committerWill Deacon <will.deacon@arm.com>2017-10-11 17:28:40 +0300
commitf5e035f8694c3bdddc66ea46ecda965ee6853718 (patch)
treee67a09960f2ae8a892c670104223436c72475012 /Documentation/arm64
parent0c3039ffc07cd7c328eca3f9559d0d0102ac9bec (diff)
downloadlinux-f5e035f8694c3bdddc66ea46ecda965ee6853718.tar.xz
arm64: Expose support for optional ARMv8-A features
ARMv8-A adds a few optional features for ARMv8.2 and ARMv8.3. Expose them to the userspace via HWCAPs and mrs emulation. SHA2-512 - Instruction support for SHA512 Hash algorithm (e.g SHA512H, SHA512H2, SHA512U0, SHA512SU1) SHA3 - SHA3 crypto instructions (EOR3, RAX1, XAR, BCAX). SM3 - Instruction support for Chinese cryptography algorithm SM3 SM4 - Instruction support for Chinese cryptography algorithm SM4 DP - Dot Product instructions (UDOT, SDOT). Cc: Will Deacon <will.deacon@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Dave Martin <dave.martin@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@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')
-rw-r--r--Documentation/arm64/cpu-feature-registers.txt12
1 files changed, 11 insertions, 1 deletions
diff --git a/Documentation/arm64/cpu-feature-registers.txt b/Documentation/arm64/cpu-feature-registers.txt
index dad411d635d8..011ddfc1e570 100644
--- a/Documentation/arm64/cpu-feature-registers.txt
+++ b/Documentation/arm64/cpu-feature-registers.txt
@@ -110,10 +110,20 @@ infrastructure:
x--------------------------------------------------x
| Name | bits | visible |
|--------------------------------------------------|
- | RES0 | [63-32] | n |
+ | RES0 | [63-48] | n |
+ |--------------------------------------------------|
+ | DP | [47-44] | y |
+ |--------------------------------------------------|
+ | SM4 | [43-40] | y |
+ |--------------------------------------------------|
+ | SM3 | [39-36] | y |
+ |--------------------------------------------------|
+ | SHA3 | [35-32] | y |
|--------------------------------------------------|
| RDM | [31-28] | y |
|--------------------------------------------------|
+ | RES0 | [27-24] | n |
+ |--------------------------------------------------|
| ATOMICS | [23-20] | y |
|--------------------------------------------------|
| CRC32 | [19-16] | y |