1 files changed, 22 insertions, 1 deletions

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index 8cb5dbbd9c2e..a3ae8e6c8b3b 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -116,12 +116,31 @@ static const unsigned char *const k7_nops[ASM_NOP_MAX+1] = {
 };
 #endif
 
+#ifdef P6_NOP1
+asm("\t.section .rodata, \"a\"\np6nops: "
+        P6_NOP1 P6_NOP2 P6_NOP3 P6_NOP4 P6_NOP5 P6_NOP6
+        P6_NOP7 P6_NOP8);
+extern const unsigned char p6nops[];
+static const unsigned char *const p6_nops[ASM_NOP_MAX+1] = {
+        NULL,
+        p6nops,
+        p6nops + 1,
+        p6nops + 1 + 2,
+        p6nops + 1 + 2 + 3,
+        p6nops + 1 + 2 + 3 + 4,
+        p6nops + 1 + 2 + 3 + 4 + 5,
+        p6nops + 1 + 2 + 3 + 4 + 5 + 6,
+        p6nops + 1 + 2 + 3 + 4 + 5 + 6 + 7,
+};
+#endif
+
 #ifdef CONFIG_X86_64
 
 extern char __vsyscall_0;
 static inline const unsigned char*const * find_nop_table(void)
 {
-        return k8_nops;
+        return boot_cpu_data.x86_vendor != X86_VENDOR_INTEL ||
+               boot_cpu_data.x86 < 6 ? k8_nops : p6_nops;
 }
 
 #else /* CONFIG_X86_64 */
@@ -132,6 +151,8 @@ static const struct nop {
 } noptypes[] = {
         { X86_FEATURE_K8, k8_nops },
         { X86_FEATURE_K7, k7_nops },
+        { X86_FEATURE_P4, p6_nops },
+        { X86_FEATURE_P3, p6_nops },
         { -1, NULL }
 };