Messages in this thread Patch in this message | | | From | Lan Tianyu <> | Subject | [PATCH 7/7] KVM/PPC: update the comment of memory barrier in the kvmppc_prepare_to_enter() | Date | Sun, 13 Mar 2016 11:10:30 +0800 |
| |
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.lan@intel.com> --- arch/powerpc/kvm/powerpc.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 19aa59b..6a68730 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -96,6 +96,9 @@ int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) * so we don't miss a request because the requester sees * OUTSIDE_GUEST_MODE and assumes we'll be checking requests * before next entering the guest (and thus doesn't IPI). + * 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(); -- 1.8.4.rc0.1.g8f6a3e5.dirty
| |