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KVM: VMX: flush TLB with INVEPT on cpu migration

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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>
This commit is contained in:
Marcelo Tosatti 2009-10-01 19:16:58 -03:00 committed by Avi Kivity
parent b2d83cfa3f
commit eb5109e311
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/vmx.c
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@ -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));