tree 455461b843f5f94356786ea0e21132740458588a
parent c37079586f317d7e7f1a70d36f0e5177691c89c2
author Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> 1310412534 +0800
committer Avi Kivity <avi@redhat.com> 1311497434 +0300

KVM: MMU: filter out the mmio pfn from the fault pfn

If the page fault is caused by mmio, the gfn can not be found in memslots, and
'bad_pfn' is returned on gfn_to_hva path, so we can use 'bad_pfn' to identify
the mmio page fault.
And, to clarify the meaning of mmio pfn, we return fault page instead of bad
page when the gfn is not allowd to prefetch

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>