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| author | Lan Tianyu <tianyu.lan@intel.com> | 2016-03-13 11:10:30 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-03-22 16:38:37 +0100 |
| commit | 489153c746746fc44b1e2fd184248dee8aebbaff (patch) | |
| tree | f41b7784e4b256ddb8640e6e2755abfe8f917ca4 | |
| parent | 0f127d12e44c13d2f90e5c613490e70ddb1a5e08 (diff) | |
| download | asoc-489153c746746fc44b1e2fd184248dee8aebbaff.tar.gz | |
KVM/PPC: update the comment of memory barrier in the kvmppc_prepare_to_enter()
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>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/powerpc/kvm/powerpc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 19aa59b0850cf..6a68730774ee7 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(); |