x86/asm: Add support for the pcommit instruction

[karo-tx-linux.git] / arch / x86 / include / asm / special_insns.h

diff --git a/arch/x86/include/asm/special_insns.h b/arch/x86/include/asm/special_insns.h
index e820c080a4e99e45354fc7b6e5720d9f1933b241..09625014383253c709f4c7c257219c3ad85fa922 100644 (file)
--- a/arch/x86/include/asm/special_insns.h
+++ b/arch/x86/include/asm/special_insns.h
@@ -4,6 +4,8 @@
 
 #ifdef __KERNEL__
 
+#include <asm/nops.h>
+
 static inline void native_clts(void)
 {
        asm volatile("clts");
@@ -199,6 +201,14 @@ static inline void clflushopt(volatile void *__p)
                       "+m" (*(volatile char __force *)__p));
 }
 
+static inline void pcommit_sfence(void)
+{
+       alternative(ASM_NOP7,
+                   ".byte 0x66, 0x0f, 0xae, 0xf8\n\t" /* pcommit */
+                   "sfence",
+                   X86_FEATURE_PCOMMIT);
+}
+
 #define nop() asm volatile ("nop")