diff options
| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2011-07-12 03:28:54 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-07-24 11:50:34 +0300 |
| commit | fce92dce79dbf5fff39c7ac2fb149729d79b7a39 (patch) | |
| tree | 455461b843f5f94356786ea0e21132740458588a /arch | |
| parent | c37079586f317d7e7f1a70d36f0e5177691c89c2 (diff) | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 5334b4e9ecc7..96a7ed4e6837 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2085,8 +2085,8 @@ static pfn_t pte_prefetch_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn, slot = gfn_to_memslot_dirty_bitmap(vcpu, gfn, no_dirty_log); if (!slot) { - get_page(bad_page); - return page_to_pfn(bad_page); + get_page(fault_page); + return page_to_pfn(fault_page); } hva = gfn_to_hva_memslot(slot, gfn); |