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Commit 2245a28f authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: MMU: Add locking around kvm_mmu_slot_remove_write_access() 



It was generally safe due to slots_lock being held for write, but it wasn't
very nice.

Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent bc2d4299

arch/x86/kvm/mmu.c

+2 −0
Original line number Diff line number Diff line
@@ -2097,6 +2097,7 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot) 
{

	struct kvm_mmu_page *sp;



	spin_lock(&kvm->mmu_lock);

	list_for_each_entry(sp, &kvm->arch.active_mmu_pages, link) {

		int i;

		u64 *pt;
@@ -2110,6 +2111,7 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot) 
			if (pt[i] & PT_WRITABLE_MASK)

				pt[i] &= ~PT_WRITABLE_MASK;

	}

	spin_unlock(&kvm->mmu_lock);

}



void kvm_mmu_zap_all(struct kvm *kvm)