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Groups > linux.kernel > #1356599
| From | Lan Tianyu <tianyu.lan@intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 7/7] KVM/PPC: update the comment of memory barrier in the kvmppc_prepare_to_enter() |
| Date | 2016-03-13 04:30 +0100 |
| Message-ID | <rc4T8-830-17@gated-at.bofh.it> (permalink) |
| References | <rc4T7-830-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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
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[PATCH 0/7] KVM/X86/PPC: Clear up kvm mmu memory barriers and update related comments Lan Tianyu <tianyu.lan@intel.com> - 2016-03-13 04:30 +0100 [PATCH 4/7] KVM/x86: Call smp_wmb() before increasing tlbs_dirty Lan Tianyu <tianyu.lan@intel.com> - 2016-03-13 04:30 +0100 [PATCH 7/7] KVM/PPC: update the comment of memory barrier in the kvmppc_prepare_to_enter() Lan Tianyu <tianyu.lan@intel.com> - 2016-03-13 04:30 +0100 [PATCH 5/7] KVM: Replace smp_mb() with smp_load_acquire() in the kvm_flush_remote_tlbs() Lan Tianyu <tianyu.lan@intel.com> - 2016-03-13 04:30 +0100 [PATCH 6/7] KVM/x86: update the comment of memory barrier in the vcpu_enter_guest() Lan Tianyu <tianyu.lan@intel.com> - 2016-03-13 04:30 +0100 Re: [PATCH 0/7] KVM/X86/PPC: Clear up kvm mmu memory barriers and update related comments Paolo Bonzini <pbonzini@redhat.com> - 2016-03-14 14:10 +0100
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