The barrier also orders the write to mode from any reads
to the page tables done and so update the comment.
Signed-off-by: Lan Tianyu <tianyu....@intel.com>
---
arch/x86/kvm/x86.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bcbce0f..4bdb4e6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6589,8 +6589,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
- /* We should set ->mode before check ->requests,
- * see the comment in make_all_cpus_request.
+ /*
+ * We should set ->mode before check ->requests,
+ * Please see the comment in kvm_make_all_cpus_request.
+ * This also orders the write to mode from any reads
+ * to the page tables done while the VCPU is running.
+ * Please see the comment in kvm_flush_remote_tlbs.
*/
smp_mb__after_srcu_read_unlock();
--
1.8.4.rc0.1.g8f6a3e5.dirty
