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From: Sheng Yang <sheng@linux.intel.com>
To: Avi Kivity <avi@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>,
	Anthony Liguori <anthony@codemonkey.ws>
Cc: kvm@vger.kernel.org, qemu-devel@nongnu.org,
	Sheng Yang <sheng@linux.intel.com>
Subject: [PATCH] qemu: Enable XSAVE related CPUID
Date: Thu, 27 May 2010 17:50:06 +0800
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diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c
index eebf038..cbf5595 100644
--- a/target-i386/cpuid.c
+++ b/target-i386/cpuid.c
@@ -1067,6 +1067,38 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
         *ecx = 0;
         *edx = 0;
         break;
+    case 0xD:
+        /* Processor Extended State */
+        if (!(env->cpuid_ext_features & CPUID_EXT_XSAVE)) {
+            *eax = 0;
+            *ebx = 0;
+            *ecx = 0;
+            *edx = 0;
+            break;
+        }
+        if (count == 0) {
+            *eax = 0x7; /* FP | SSE | YMM */
+            *ebx = 0x340; /* FP + SSE + YMM size */
+            *ecx = 0x340; /* FP + SSE + YMM size */
+            *edx = 0;
+        } else if (count == 1) {
+            /* eax = 1, so we can continue with others */
+            *eax = 1;
+            *ebx = 0;
+            *ecx = 0;
+            *edx = 0;
+        } else if (count == 2) {
+            *eax = 0x100; /* YMM size */
+            *ebx = 0x240; /* YMM offset */
+            *ecx = 0;
+            *edx = 0;
+        } else {
+            *eax = 0;
+            *ebx = 0;
+            *ecx = 0;
+            *edx = 0;
+        }
+        break;
     case 0x80000000:
         *eax = env->cpuid_xlevel;
         *ebx = env->cpuid_vendor1;