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    Subject[PATCH 4/5] x86: Add rdpmcl()
    Date
    From: Andi Kleen <ak@linux.intel.com>

    Add a version of rdpmc() that directly reads into a u64

    Signed-off-by: Andi Kleen <ak@linux.intel.com>
    ---
    arch/x86/include/asm/msr.h | 2 ++
    arch/x86/include/asm/paravirt.h | 2 ++
    2 files changed, 4 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
    index 084ef95..e489c14 100644
    --- a/arch/x86/include/asm/msr.h
    +++ b/arch/x86/include/asm/msr.h
    @@ -237,6 +237,8 @@ do { \
    (high) = (u32)(_l >> 32); \
    } while (0)

    +#define rdpmcl(counter, val) ((val) = native_read_pmc(counter))
    +
    #define rdtscp(low, high, aux) \
    do { \
    unsigned long long _val = native_read_tscp(&(aux)); \
    diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
    index 6cbbabf..14ce05d 100644
    --- a/arch/x86/include/asm/paravirt.h
    +++ b/arch/x86/include/asm/paravirt.h
    @@ -252,6 +252,8 @@ do { \
    high = _l >> 32; \
    } while (0)

    +#define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter))
    +
    static inline unsigned long long paravirt_rdtscp(unsigned int *aux)
    {
    return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux);
    --
    1.7.7.6


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