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    Subject[PATCH v3 01/74] x86/cpu/vfm: Add/initialize x86_vfm field to struct cpuinfo_x86
    Date
    Refactor struct cpuinfo_x86 so that the vendor, family, and model
    fields are overlaid in a union with a 32-bit field that combines
    all three (together with a one byte reserved field in the upper
    byte).

    This will make it easy, cheap, and reliable to check all three
    values at once.

    Signed-off-by: Tony Luck <tony.luck@intel.com>
    Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
    ---
    arch/x86/include/asm/processor.h | 12 +++++++++---
    1 file changed, 9 insertions(+), 3 deletions(-)

    diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
    index 89ed5237e79f..d13338860710 100644
    --- a/arch/x86/include/asm/processor.h
    +++ b/arch/x86/include/asm/processor.h
    @@ -108,9 +108,15 @@ struct cpuinfo_topology {
    };

    struct cpuinfo_x86 {
    - __u8 x86; /* CPU family */
    - __u8 x86_vendor; /* CPU vendor */
    - __u8 x86_model;
    + union {
    + struct {
    + __u8 x86_model;
    + __u8 x86; /* CPU family */
    + __u8 x86_vendor; /* CPU vendor */
    + __u8 x86_reserved;
    + };
    + __u32 x86_vfm; /* combined vendor, family, model */
    + };
    __u8 x86_stepping;
    #ifdef CONFIG_X86_64
    /* Number of 4K pages in DTLB/ITLB combined(in pages): */
    --
    2.44.0

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