Re: [Qemu-devel] [PATCH] i386: correct cpu_x86_cpuid(0xd)

[Paolo Bonzini <pbonzini@redhat.com>]

On 17/10/2018 20:12, Sebastian Andrzej Siewior wrote:
> On 2018-09-28 11:54:11 [-0300], Eduardo Habkost wrote:
>> On Fri, Sep 28, 2018 at 12:43:19PM +0200, Sebastian Andrzej Siewior wrote:
>>> Intel SDM says for CPUID function 0DH, sub-function 0:
>>>
>>> | • ECX enumerates the size (in bytes) required by the XSAVE instruction for an
>>> |   XSAVE area containing all the user state components supported by this
>>> |   processor.
>>> | • EBX enumerates the size (in bytes) required by the XSAVE instruction for an
>>> |   XSAVE area containing all the user state components corresponding to bits
>>> |   currently set in XCR0.
>>>
>>> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
>>> ---
>>>  target/i386/cpu.c | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
>>> index f24295e6e4bb7..00c18444c0bac 100644
>>> --- a/target/i386/cpu.c
>>> +++ b/target/i386/cpu.c
>>> @@ -4178,7 +4178,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
>>>              *ecx = xsave_area_size(x86_cpu_xsave_components(cpu));
>>>              *eax = env->features[FEAT_XSAVE_COMP_LO];
>>>              *edx = env->features[FEAT_XSAVE_COMP_HI];
>>> -            *ebx = *ecx;
>>> +            *ebx = xsave_area_size(env->xcr0);
>>
>> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
> 
> ping

It's queued for my next pull request.

Paolo