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KVM: x86: add track_flush_slot page track notifier

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When a memory slot is being moved or removed users of page track
can be notified. So users can drop write-protection for the pages
in that memory slot.

This notifier type is needed by KVMGT to sync up its shadow page
table when memory slot is being moved or removed.

Register the notifier type track_flush_slot to receive memslot move
and remove event.

Reviewed-by: Xiao Guangrong <guangrong.xiao@intel.com>
Signed-off-by: Chen Xiaoguang <xiaoguang.chen@intel.com>
[Squashed commits to avoid bisection breakage and reworded the subject.]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
This commit is contained in:
Xiaoguang Chen
2016-10-09 15:41:44 +08:00
committed by Paolo Bonzini
parent d9092f52d7
commit ae7cd87372
4 changed files with 42 additions and 1 deletions
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arch/x86/kvm/x86.c
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@@ -8155,7 +8155,7 @@ void kvm_arch_flush_shadow_all(struct kvm *kvm)
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot)
{
kvm_mmu_invalidate_zap_all_pages(kvm);
kvm_page_track_flush_slot(kvm, slot);
}
static inline bool kvm_vcpu_has_events(struct kvm_vcpu *vcpu)