Re: [PATCH v2 07/22] KVM: MMU: cache mmio info on page fault path

Xiao Guangrong
2011-06-29T11:07:46Z

On 06/29/2011 04:48 PM, Avi Kivity wrote:
> On 06/22/2011 05:31 PM, Xiao Guangrong wrote:
>> If the page fault is caused by mmio, we can cache the mmio info, later, we do
>> not need to walk guest page table and quickly know it is a mmio fault while we
>> emulate the mmio instruction
>
> Does this work if the mmio spans two pages?
>

If the mmio spans two pages, we already split the emulation into two parts,
and the mmio cache info is only matched for one page, so i thinks it works
well :-)