Patchwork [2/4] qemu: Enable XSAVE related CPUID

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Submitter Sheng Yang
Date June 17, 2010, 7:18 a.m.
Message ID <1276759096-29104-3-git-send-email-sheng@linux.intel.com>
Download mbox | patch
Permalink /patch/55977/
State New
Headers show

Comments

Sheng Yang - June 17, 2010, 7:18 a.m.
We can support it in KVM now. The 0xd leaf is queried from KVM.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
---
 target-i386/cpuid.c |   21 +++++++++++++++++++++
 1 files changed, 21 insertions(+), 0 deletions(-)

Patch

diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c
index 99d1f44..ab6536b 100644
--- a/target-i386/cpuid.c
+++ b/target-i386/cpuid.c
@@ -1067,6 +1067,27 @@  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 (kvm_enabled()) {
+            *eax = kvm_arch_get_supported_cpuid(env, 0xd, count, R_EAX);
+            *ebx = kvm_arch_get_supported_cpuid(env, 0xd, count, R_EBX);
+            *ecx = kvm_arch_get_supported_cpuid(env, 0xd, count, R_ECX);
+            *edx = kvm_arch_get_supported_cpuid(env, 0xd, count, R_EDX);
+        } else {
+            *eax = 0;
+            *ebx = 0;
+            *ecx = 0;
+            *edx = 0;
+        }
+        break;
     case 0x80000000:
         *eax = env->cpuid_xlevel;
         *ebx = env->cpuid_vendor1;