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    Subject[PATCH 3.10 33/46] powerpc: Add AT_HWCAP2 to indicate V.CRYPTO category support
    Date
    3.10-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    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
    @@ -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)



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