From 86196c65acd7f4a524c4d8d34fd4d9a6afe040c2 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Wed, 29 Apr 2015 22:26:00 -0600 Subject: [PATCH] x86: Add functions to set and clear bits on MSRs Since we do these sorts of operations a lot, it is useful to have a simpler API, similar to clrsetbits_le32(). Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- arch/x86/include/asm/msr.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h index 1955a752b9..c480920d25 100644 --- a/arch/x86/include/asm/msr.h +++ b/arch/x86/include/asm/msr.h @@ -128,6 +128,34 @@ static inline void wrmsr(unsigned msr, unsigned low, unsigned high) #define wrmsrl(msr, val) \ native_write_msr((msr), (u32)((u64)(val)), (u32)((u64)(val) >> 32)) +static inline void msr_clrsetbits_64(unsigned msr, u64 clear, u64 set) +{ + u64 val; + + val = native_read_msr(msr); + val &= ~clear; + val |= set; + wrmsrl(msr, val); +} + +static inline void msr_setbits_64(unsigned msr, u64 set) +{ + u64 val; + + val = native_read_msr(msr); + val |= set; + wrmsrl(msr, val); +} + +static inline void msr_clrbits_64(unsigned msr, u64 clear) +{ + u64 val; + + val = native_read_msr(msr); + val &= ~clear; + wrmsrl(msr, val); +} + /* rdmsr with exception handling */ #define rdmsr_safe(msr, p1, p2) \ ({ \ -- 2.39.5