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| author |  Xiao Guangrong <guangrong.xiao@linux.intel.com>
| 2016-02-24 17:51:11 +0800 |
|---|---|---|
| committer |  Paolo Bonzini <pbonzini@redhat.com>
| 2016-03-03 14:36:21 +0100 |
| commit | 3d0c27ad6ee465f174b09ee99fcaf189c57d567a (patch) | |
| tree | e342d0a67b9b7fbc4e124aaa85f873b017a9edb8 /arch/x86/include/asm/kvm_page_track.h | |
| parent | KVM: page track: introduce kvm_slot_page_track_{add,remove}_page (diff) | |
| download | linux-3d0c27ad6ee465f174b09ee99fcaf189c57d567a.tar.gz linux-3d0c27ad6ee465f174b09ee99fcaf189c57d567a.tar.bz2 linux-3d0c27ad6ee465f174b09ee99fcaf189c57d567a.zip | |
KVM: MMU: let page fault handler be aware tracked page
The page fault caused by write access on the write tracked page can not
be fixed, it always need to be emulated. page_fault_handle_page_track()
is the fast path we introduce here to skip holding mmu-lock and shadow
page table walking
However, if the page table is not present, it is worth making the page
table entry present and readonly to make the read access happy
mmu_need_write_protect() need to be cooked to avoid page becoming writable
when making page table present or sync/prefetch shadow page table entries
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_page_track.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_page_track.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_page_track.h b/arch/x86/include/asm/kvm_page_track.h index e363e3040ba4..5f16e2864e73 100644 --- a/arch/x86/include/asm/kvm_page_track.h +++ b/arch/x86/include/asm/kvm_page_track.h @@ -17,4 +17,6 @@ void kvm_slot_page_track_add_page(struct kvm *kvm, void kvm_slot_page_track_remove_page(struct kvm *kvm, struct kvm_memory_slot *slot, gfn_t gfn, enum kvm_page_track_mode mode); +bool kvm_page_track_is_active(struct kvm_vcpu *vcpu, gfn_t gfn, + enum kvm_page_track_mode mode); #endif |