x86/idle: Use MONITORX and MWAITX mnemonics in <asm/mwait.h>

Current minimum required version of binutils is 2.30, which supports MONITORX
and MWAITX instruction mnemonics.

Replace the byte-wise specification of MONITORX and MWAITX with these proper
mnemonics.

No functional change intended.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/20250616083056.157460-1-ubizjak@gmail.com

diff --git a/arch/x86/include/asm/mwait.h b/arch/x86/include/asm/mwait.h
index 6ca6516c7492e8cbbe2c5e8d7401fc4c5159dca9..e4815e15dc9adc24079d4ca597f9816ca2dbf96d 100644 (file)
--- a/arch/x86/include/asm/mwait.h
+++ b/arch/x86/include/asm/mwait.h
@@ -36,9 +36,7 @@ static __always_inline void __monitor(const void *eax, u32 ecx, u32 edx)
 
 static __always_inline void __monitorx(const void *eax, u32 ecx, u32 edx)
 {
-       /* "monitorx %eax, %ecx, %edx" */
-       asm volatile(".byte 0x0f, 0x01, 0xfa"
-                    :: "a" (eax), "c" (ecx), "d"(edx));
+       asm volatile("monitorx" :: "a" (eax), "c" (ecx), "d"(edx));
 }
 
 static __always_inline void __mwait(u32 eax, u32 ecx)
@@ -80,9 +78,7 @@ static __always_inline void __mwaitx(u32 eax, u32 ebx, u32 ecx)
 {
        /* No need for TSA buffer clearing on AMD */
 
-       /* "mwaitx %eax, %ebx, %ecx" */
-       asm volatile(".byte 0x0f, 0x01, 0xfb"
-                    :: "a" (eax), "b" (ebx), "c" (ecx));
+       asm volatile("mwaitx" :: "a" (eax), "b" (ebx), "c" (ecx));
 }
 
 /*