On Tue, Jun 14, 2016 at 10:21:41AM +0200, Paolo Bonzini wrote:
>
>
> On 14/06/2016 07:01, Chao Peng wrote:
> >> >
> >> > Which are the CPUID leaves for which KVM_GET_SUPPORTED_CPUID is not
> >> > stateless? I cannot find any.
> > I have though leaf 0xd, sub leaf 1 is not stateless, as the size
On 14/06/2016 07:01, Chao Peng wrote:
>> >
>> > Which are the CPUID leaves for which KVM_GET_SUPPORTED_CPUID is not
>> > stateless? I cannot find any.
> I have though leaf 0xd, sub leaf 1 is not stateless, as the size of
> xsave buffer(EBX) is based on XCR0 | IA32_XSS. But after looking KVM
> c
On Mon, Jun 13, 2016 at 12:02:41PM +0200, Paolo Bonzini wrote:
>
>
> On 13/06/2016 04:21, Chao Peng wrote:
> > KVM_GET_SUPPORTED_CPUID ioctl is called frequently when initializing
> > CPU. Depends on CPU features and CPU count, the number of calls can be
> > extremely high which slows down QEMU b
On 13/06/2016 04:21, Chao Peng wrote:
> KVM_GET_SUPPORTED_CPUID ioctl is called frequently when initializing
> CPU. Depends on CPU features and CPU count, the number of calls can be
> extremely high which slows down QEMU booting significantly. In our
> testing, we saw 5922 calls with switches:
>
