--- a/qemu/qemu-kvm-x86.c
+++ b/qemu/qemu-kvm-x86.c
@@ -428,35 +428,15 @@ static void host_cpuid(uint32_t function, uint32_t *eax, uint32_t *ebx,
     uint32_t vec[4];
 
     vec[0] = function;
-    asm volatile (
 #ifdef __x86_64__
-	 "sub $128, %%rsp \n\t"  /* skip red zone */
-         "push %0;  push %%rsi \n\t"
-	 "push %%rax; push %%rbx; push %%rcx; push %%rdx \n\t"
-	 "mov 8*5(%%rsp), %%rsi \n\t"
-	 "mov (%%rsi), %%eax \n\t"
-	 "cpuid \n\t"
-	 "mov %%eax, (%%rsi) \n\t"
-	 "mov %%ebx, 4(%%rsi) \n\t"
-	 "mov %%ecx, 8(%%rsi) \n\t"
-	 "mov %%edx, 12(%%rsi) \n\t"
-	 "pop %%rdx; pop %%rcx; pop %%rbx; pop %%rax \n\t"
-	 "pop %%rsi; pop %0 \n\t"
-	 "add $128, %%rsp"
+    asm volatile("cpuid" : "+a" (vec[0]), "=b" (vec[1]),"=c" (vec[2]), "=d" (vec[3]));
 #else
-         "push %0;  push %%esi \n\t"
-	 "push %%eax; push %%ebx; push %%ecx; push %%edx \n\t"
-	 "mov 4*5(%%esp), %%esi \n\t"
-	 "mov (%%esi), %%eax \n\t"
-	 "cpuid \n\t"
-	 "mov %%eax, (%%esi) \n\t"
-	 "mov %%ebx, 4(%%esi) \n\t"
-	 "mov %%ecx, 8(%%esi) \n\t"
-	 "mov %%edx, 12(%%esi) \n\t"
-	 "pop %%edx; pop %%ecx; pop %%ebx; pop %%eax \n\t"
-	 "pop %%esi; pop %0 \n\t"
+    asm volatile("pushl %%ebx \n\t"
+		 "cpuid \n\t"
+		 "movl %%ebx, %0 \n\t"
+		 "popl %%ebx"
+		 : "+a" (vec[0]), "=r" (vec[1]),"=c" (vec[2]), "=d" (vec[3]));
 #endif
-	 : : "rm"(vec) : "memory");
     if (eax)
 	*eax = vec[0];
     if (ebx)