On 2011-06-10 14:08, Andre Przywara wrote:
> 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 <andre.przywara@xxxxxxx>
> ---
> target-i386/kvm.c | 4 +++-
> 1 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/target-i386/kvm.c b/target-i386/kvm.c
> index faedc6c..4a97f78 100644
> --- a/target-i386/kvm.c
> +++ b/target-i386/kvm.c
> @@ -448,6 +448,8 @@ int kvm_arch_init_vcpu(CPUState *env)
> case 0xb:
> case 0xd:
> for (j = 0; ; j++) {
> + if (i == 0xd && j == 64)
> + break;
checkpatch.pl?
> c->function = i;
> c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
> c->index = j;
> @@ -460,7 +462,7 @@ int kvm_arch_init_vcpu(CPUState *env)
> break;
> }
> if (i == 0xd && c->eax == 0) {
> - break;
> + continue;
> }
> c = &cpuid_data.entries[cpuid_i++];
> }
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
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