Commit 34d4cb8f authored Jul 10, 2008 by Marcelo Tosatti Committed by Avi Kivity Jul 20, 2008

KVM: MMU: nuke shadowed pgtable pages and ptes on memslot destruction



Flush the shadow mmu before removing regions to avoid stale entries.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

parent d6e88aec

arch/ia64/kvm/kvm-ia64.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1455,6 +1455,9 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
		return 0;
		}

		void kvm_arch_flush_shadow(struct kvm *kvm)
		{
		}

		long kvm_arch_dev_ioctl(struct file *filp,
		unsigned int ioctl, unsigned long arg)

arch/powerpc/kvm/powerpc.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -170,6 +170,10 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
		return 0;
		}

		void kvm_arch_flush_shadow(struct kvm *kvm)
		{
		}

		struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
		{
		struct kvm_vcpu *vcpu;

arch/s390/kvm/kvm-s390.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -675,6 +675,10 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
		return 0;
		}

		void kvm_arch_flush_shadow(struct kvm *kvm)
		{
		}

		gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
		{
		return gfn;

arch/x86/kvm/x86.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -4032,6 +4032,11 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
		return 0;
		}

		void kvm_arch_flush_shadow(struct kvm *kvm)
		{
		kvm_mmu_zap_all(kvm);
		}

		int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
		{
		return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE

include/linux/kvm_host.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -168,6 +168,7 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
		struct kvm_userspace_memory_region *mem,
		struct kvm_memory_slot old,
		int user_alloc);
		void kvm_arch_flush_shadow(struct kvm *kvm);
		gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
		struct page gfn_to_page(struct kvm kvm, gfn_t gfn);
		unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);