KVM: VMX: flush TLB with INVEPT on cpu migration
authorMarcelo Tosatti <mtosatti@redhat.com>
Thu, 1 Oct 2009 22:16:58 +0000 (19:16 -0300)
committerAvi Kivity <avi@redhat.com>
Sun, 4 Oct 2009 11:57:24 +0000 (13:57 +0200)
It is possible that stale EPTP-tagged mappings are used, if a
vcpu migrates to a different pcpu.

Set KVM_REQ_TLB_FLUSH in vmx_vcpu_load, when switching pcpus, which
will invalidate both VPID and EPT mappings on the next vm-entry.

Cc: stable@kernel.org
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
arch/x86/kvm/vmx.c

index f3812014bd0b3e4d04ecd5c0645eb0dad9baa0e9..ed53b42caba119bb7b488efdf79170b44ba922e4 100644 (file)
@@ -709,7 +709,7 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
        if (vcpu->cpu != cpu) {
                vcpu_clear(vmx);
                kvm_migrate_timers(vcpu);
-               vpid_sync_vcpu_all(vmx);
+               set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
                local_irq_disable();
                list_add(&vmx->local_vcpus_link,
                         &per_cpu(vcpus_on_cpu, cpu));