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>
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 @@
#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) \
({ \