Re: [Qemu-devel] [PATCH] Qemu: Fix eax for cpuid leaf 0x40000000

[Paolo Bonzini]

Il 04/06/2014 03:10, Jidong Xiao ha scritto:
> diff --git a/qemu-2.0.0/target-i386/kvm.c.orig b/qemu-2.0.0/target-i386/kvm.c
> index 4389959..b8b282d 100644
> --- a/qemu-2.0.0/target-i386/kvm.c.orig
> +++ b/qemu-2.0.0/target-i386/kvm.c
> @@ -530,7 +530,7 @@ int kvm_arch_init_vcpu(CPUState *cs)
>      memcpy(signature, "KVMKVMKVM\0\0\0", 12);
>      c = &cpuid_data.entries[cpuid_i++];
>      c->function = KVM_CPUID_SIGNATURE | kvm_base;
> -    c->eax = 0;
> +   c->eax = KVM_CPUID_FEATURES;
>      c->ebx = signature[0];
>      c->ecx = signature[1];
>      c->edx = signature[2];

This should actually be "KVM_CPUID_FEATURES | kvm_base", in case Hyper-V 
leaves are available too.  But it is a good catch!

Paolo