On 10/11/2010 08:49 AM, Neo Jia wrote:
On Sun, Oct 10, 2010 at 11:30 PM, Avi Kivity<a...@redhat.com> wrote:
> On 10/11/2010 07:46 AM, Neo Jia wrote:
>>
>> BTW, I have a question about saving FPU, especially those XMM
>> registers. I don't see an explicit save FPU after exiting guest due to
>> an exception (MMIO writes). The only thing I saw about fpu operation
>> is fpu restore right before loading guest.
>>
>> Is there anything I missed here?
>
> kvm_put_guest_fpu.
I found that function and it will be called by vcpu_put eventually
inside kvm_arch_vcpu_ioctl_run, but kvm_mmu_page_fault is called much
earlier than that inside kvm exit exception handler. so, the fxsave
data for the guest image might not be saved at that moment, when I am
going to emulate this instruction?
Just call it when you want to be sure it is in memory.
--
error compiling committee.c: too many arguments to function
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