From 31e8c69697becf5e0b54a6a0cef1d27109d469e9 Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Fri, 10 Jun 2011 15:56:28 +0200 Subject: [PATCH] KVM: Fix XSAVE feature bit enumeration When iterating through the XSAVE feature enumeration CPUID leaf (0xD) we should not stop at the first zero EAX, but instead keep scanning since there are gaps in the enumeration (ECX=1 for instance). This fixes the proper usage of AVX in KVM guests. Signed-off-by: Andre Przywara Signed-off-by: Marcelo Tosatti --- target-i386/kvm.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 938e0a3e23..10fb2c4b07 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -416,6 +416,9 @@ int kvm_arch_init_vcpu(CPUState *env) case 0xb: case 0xd: for (j = 0; ; j++) { + if (i == 0xd && j == 64) { + break; + } c->function = i; c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; c->index = j; @@ -428,7 +431,7 @@ int kvm_arch_init_vcpu(CPUState *env) break; } if (i == 0xd && c->eax == 0) { - break; + continue; } c = &cpuid_data.entries[cpuid_i++]; }