| From dd58a092c4202f2bd490adab7285b3ff77f8e467 Mon Sep 17 00:00:00 2001 |
| From: Benjamin Herrenschmidt <benh@kernel.crashing.org> |
| Date: Tue, 10 Jun 2014 15:04:40 +1000 |
| Subject: powerpc: Add AT_HWCAP2 to indicate V.CRYPTO category support |
| |
| From: Benjamin Herrenschmidt <benh@kernel.crashing.org> |
| |
| commit dd58a092c4202f2bd490adab7285b3ff77f8e467 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> |
| |
| --- |
| arch/powerpc/include/uapi/asm/cputable.h | 1 + |
| arch/powerpc/kernel/cputable.c | 3 ++- |
| 2 files changed, 3 insertions(+), 1 deletion(-) |
| |
| --- a/arch/powerpc/include/uapi/asm/cputable.h |
| +++ b/arch/powerpc/include/uapi/asm/cputable.h |
| @@ -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 */ |
| --- a/arch/powerpc/kernel/cputable.c |
| +++ b/arch/powerpc/kernel/cputable.c |
| @@ -109,7 +109,8 @@ 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) |
