diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index bdcbf23b8b1e..1f953f230ad5 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -322,13 +322,15 @@ static int fastop(struct x86_emulate_ctxt *ctxt, fastop_t fop);
 #define FOP_RET(name) \
 	__FOP_RET(#name)
 
-#define FOP_START(op) \
+#define __FOP_START(op, align) \
 	extern void em_##op(struct fastop *fake); \
 	asm(".pushsection .text, \"ax\" \n\t" \
 	    ".global em_" #op " \n\t" \
-	    ".align " __stringify(FASTOP_SIZE) " \n\t" \
+	    ".align " __stringify(align) " \n\t" \
 	    "em_" #op ":\n\t"
 
+#define FOP_START(op) __FOP_START(op, FASTOP_SIZE)
+
 #define FOP_END \
 	    ".popsection")
 
@@ -432,15 +434,14 @@ static int fastop(struct x86_emulate_ctxt *ctxt, fastop_t fop);
 /*
  * Depending on .config the SETcc functions look like:
  *
- * SETcc %al   [3 bytes]
- * RET         [1 byte]
- * INT3        [1 byte; CONFIG_SLS]
- *
- * Which gives possible sizes 4 or 5.  When rounded up to the
- * next power-of-two alignment they become 4 or 8.
+ * SETcc %al			[3 bytes]
+ * RET | JMP __x86_return_thunk	[1,5 bytes; CONFIG_RETPOLINE]
+ * INT3				[1 byte; CONFIG_SLS]
  */
-#define SETCC_LENGTH	(4 + IS_ENABLED(CONFIG_SLS))
-#define SETCC_ALIGN	(4 << IS_ENABLED(CONFIG_SLS))
+#define RET_LENGTH	(1 + (4 * IS_ENABLED(CONFIG_RETPOLINE)) + \
+			 IS_ENABLED(CONFIG_SLS))
+#define SETCC_LENGTH	(3 + RET_LENGTH)
+#define SETCC_ALIGN	(4 << ((SETCC_LENGTH > 4) & 1) << ((SETCC_LENGTH > 8) & 1))
 static_assert(SETCC_LENGTH <= SETCC_ALIGN);
 
 #define FOP_SETCC(op) \
@@ -448,14 +449,15 @@ static_assert(SETCC_LENGTH <= SETCC_ALIGN);
 	".type " #op ", @function \n\t" \
 	#op ": \n\t" \
 	#op " %al \n\t" \
-	__FOP_RET(#op)
+	__FOP_RET(#op) \
+	".skip " __stringify(SETCC_ALIGN) " - (.-" #op "), 0xcc \n\t"
 
 asm(".pushsection .fixup, \"ax\"\n"
     ".global kvm_fastop_exception \n"
     "kvm_fastop_exception: xor %esi, %esi; " ASM_RET
     ".popsection");
 
-FOP_START(setcc)
+__FOP_START(setcc, SETCC_ALIGN)
 FOP_SETCC(seto)
 FOP_SETCC(setno)
 FOP_SETCC(setc)