[PATCH 2/8] x86/msr: Consolidate rdmsr() definitions

[Dave Hansen <dave.hansen@linux.intel.com>]

From: Dave Hansen <dave.hansen@linux.intel.com>

The paravirt and native code define very similar rdmsr()
implementations. Move the native one out to common code
and ensure it can find the paravirt implementation by
defining raw_read_msr() there.

Remove the now duplicate paravirt rdmsr().

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
---

 b/arch/x86/include/asm/msr.h      |   20 +++++++++++++-------
 b/arch/x86/include/asm/paravirt.h |    7 -------
 2 files changed, 13 insertions(+), 14 deletions(-)

diff -puN arch/x86/include/asm/msr.h~rdmsr-dups-2 arch/x86/include/asm/msr.h
--- a/arch/x86/include/asm/msr.h~rdmsr-dups-2	2026-03-20 11:24:18.760780632 -0700
+++ b/arch/x86/include/asm/msr.h	2026-03-20 11:24:18.767780943 -0700
@@ -171,6 +171,9 @@ static inline u64 native_read_pmc(int co
 
 #ifdef CONFIG_PARAVIRT_XXL
 #include <asm/paravirt.h>
+
+#define raw_read_msr		paravirt_read_msr
+
 #else
 #include <linux/errno.h>
 
@@ -185,13 +188,6 @@ static inline u64 native_read_pmc(int co
  * pointer indirection), this allows gcc to optimize better
  */
 
-#define rdmsr(msr, low, high)					\
-do {								\
-	u64 __val = raw_read_msr((msr));			\
-	(void)((low) = (u32)__val);				\
-	(void)((high) = (u32)(__val >> 32));			\
-} while (0)
-
 static inline void wrmsr(u32 msr, u32 low, u32 high)
 {
 	raw_write_msr(msr, (u64)high << 32 | low);
@@ -233,6 +229,16 @@ static __always_inline u64 rdpmc(int cou
 
 #endif	/* !CONFIG_PARAVIRT_XXL */
 
+/*
+ * Common paravirt and native helpers:
+ */
+#define rdmsr(msr, low, high)					\
+do {								\
+	u64 __val = raw_read_msr((msr));			\
+	(void)((low) = (u32)__val);				\
+	(void)((high) = (u32)(__val >> 32));			\
+} while (0)
+
 /* Instruction opcode for WRMSRNS supported in binutils >= 2.40 */
 #define ASM_WRMSRNS _ASM_BYTES(0x0f,0x01,0xc6)
 
diff -puN arch/x86/include/asm/paravirt.h~rdmsr-dups-2 arch/x86/include/asm/paravirt.h
--- a/arch/x86/include/asm/paravirt.h~rdmsr-dups-2	2026-03-20 11:24:18.764780810 -0700
+++ b/arch/x86/include/asm/paravirt.h	2026-03-20 11:24:18.767780943 -0700
@@ -161,13 +161,6 @@ static inline int paravirt_write_msr_saf
 	return PVOP_CALL2(int, pv_ops, cpu.write_msr_safe, msr, val);
 }
 
-#define rdmsr(msr, val1, val2)			\
-do {						\
-	u64 _l = paravirt_read_msr(msr);	\
-	val1 = (u32)_l;				\
-	val2 = _l >> 32;			\
-} while (0)
-
 static __always_inline void wrmsr(u32 msr, u32 low, u32 high)
 {
 	paravirt_write_msr(msr, (u64)high << 32 | low);
_