Patchwork [4/7] Enable XSAVE related CPUID

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Submitter Marcelo Tosatti
Date June 28, 2010, 4:14 p.m.
Message ID <51e49430c0472c9f609341e3058d47ed93dabe6e.1277741654.git.mtosatti@redhat.com>
Download mbox | patch
Permalink /patch/57161/
State New
Headers show

Comments

Marcelo Tosatti - June 28, 2010, 4:14 p.m.
From: Sheng Yang <sheng@linux.intel.com>

We can support it in KVM now. The 0xd leaf is queried from KVM.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.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 fe0e6b2..83057bd 100644
--- a/target-i386/cpuid.c
+++ b/target-i386/cpuid.c
@@ -1087,6 +1087,27 @@  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;