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authorSimon Glass <sjg@chromium.org>2015-04-29 22:26:00 -0600
committerSimon Glass <sjg@chromium.org>2015-04-30 16:13:46 -0600
commit86196c65acd7f4a524c4d8d34fd4d9a6afe040c2 (patch)
tree0383cebda9dfa2297ffd3376576652c984177768 /arch/x86/include
parent45b5a37836d552db30ab571d8ba67f12d7ba23b1 (diff)
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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 <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/x86/include')
-rw-r--r--arch/x86/include/asm/msr.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index 1955a75..c480920 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) \
({ \