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    Subject[PATCH 10/15 -tip] x86: Add cpufeature for System configuration
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    X86_FEATURE_SYS_CFG (System configuration MSRs) :
    MSRC001_0010 System Configuration Register (SYS_CFG)
    MSRC001_001F Northbridge Configuration Register (NB_CFG)

    Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
    ---
    arch/x86/include/asm/cpufeature.h | 1 +
    arch/x86/kernel/cpu/amd.c | 8 ++++++++
    2 files changed, 9 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
    index 13050e9..674493f 100644
    --- a/arch/x86/include/asm/cpufeature.h
    +++ b/arch/x86/include/asm/cpufeature.h
    @@ -164,6 +164,7 @@
    #define X86_FEATURE_MISC (7*32+ 9) /* Miscellaneous features */
    #define X86_FEATURE_PLATFORM (7*32+ 10) /* Platform feature */
    #define X86_FEATURE_HW_CFG (7*32+ 11) /* Hardware configuration */
    +#define X86_FEATURE_SYS_CFG (7*32+ 12) /* System configuration */

    /* Virtualization flags: Linux defined */
    #define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */
    diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
    index b2bccd2..8a8db1a 100644
    --- a/arch/x86/kernel/cpu/amd.c
    +++ b/arch/x86/kernel/cpu/amd.c
    @@ -482,6 +482,14 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
    /* MSRC001_0015 Hardware Configuration Register (HWCR) */
    set_cpu_cap(c, X86_FEATURE_HW_CFG);
    }
    + if (c->x86 >= 8) { /* K8+ */
    + /*
    + * System configuration MSRs:
    + * MSRC001_0010 System Configuration Register (SYS_CFG)
    + * MSRC001_001F Northbridge Configuration Register (NB_CFG)
    + */
    + set_cpu_cap(c, X86_FEATURE_SYS_CFG);
    + }
    if (c->x86 >= 0x10) { /* fam10h+ */
    /* MSRC001_1022 Data Cache Configuration (DC_CFG) */
    set_cpu_cap(c, X86_FEATURE_CACHE_CTL);
    --
    1.6.0.6




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