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powerpc: Add AT_HWCAP2 to indicate V.CRYPTO category support

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commit dd58a092c4 upstream.

The Vector Crypto category instructions are supported by current POWER8
chips, advertise them to userspace using a specific bit to properly
differentiate with chips of the same architecture level that might not
have them.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Benjamin Herrenschmidt
2014-06-10 15:04:40 +10:00
committed by Greg Kroah-Hartman
parent 485fafb3d0
commit 18f5426fb7
2 changed files with 3 additions and 1 deletions
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1
arch/powerpc/include/uapi/asm/cputable.h
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@@ -41,5 +41,6 @@
#define PPC_FEATURE2_EBB 0x10000000
#define PPC_FEATURE2_ISEL 0x08000000
#define PPC_FEATURE2_TAR 0x04000000
#define PPC_FEATURE2_VEC_CRYPTO 0x02000000
#endif /* _UAPI__ASM_POWERPC_CPUTABLE_H */

3
arch/powerpc/kernel/cputable.c
View File

@@ -105,7 +105,8 @@ extern void __restore_cpu_e6500(void);
PPC_FEATURE_PSERIES_PERFMON_COMPAT)
#define COMMON_USER2_POWER8 (PPC_FEATURE2_ARCH_2_07 | \
PPC_FEATURE2_HTM_COMP | PPC_FEATURE2_DSCR | \
PPC_FEATURE2_ISEL | PPC_FEATURE2_TAR)
PPC_FEATURE2_ISEL | PPC_FEATURE2_TAR | \
PPC_FEATURE2_VEC_CRYPTO)
#define COMMON_USER_PA6T (COMMON_USER_PPC64 | PPC_FEATURE_PA6T |\
PPC_FEATURE_TRUE_LE | \
PPC_FEATURE_HAS_ALTIVEC_COMP)