Messages in this thread Patch in this message | | | Date | Thu, 5 Mar 2009 14:53:33 -0300 | From | Marcelo Tosatti <> | Subject | Re: [PATCH 1/6] kvm/x86/svm: force new asid on vcpu migration |
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On Thu, Mar 05, 2009 at 01:12:28PM +0100, Joerg Roedel wrote: > Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> > --- > arch/x86/kvm/svm.c | 3 ++- > 1 files changed, 2 insertions(+), 1 deletions(-) > > diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c > index 1821c20..0e66bca 100644 > --- a/arch/x86/kvm/svm.c > +++ b/arch/x86/kvm/svm.c > @@ -180,7 +180,7 @@ static inline void kvm_write_cr2(unsigned long val) > > static inline void force_new_asid(struct kvm_vcpu *vcpu) > { > - to_svm(vcpu)->asid_generation--; > + to_svm(vcpu)->asid_generation = 0; > }
Won't the per-cpu asig_generation overflow at some point?
And can this comparison in pre_svm_run ever be true:
if (svm->vcpu.cpu != cpu
?
> static inline void flush_guest_tlb(struct kvm_vcpu *vcpu) > @@ -716,6 +716,7 @@ static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu) > svm->vmcb->control.tsc_offset += delta; > vcpu->cpu = cpu; > kvm_migrate_timers(vcpu); > + force_new_asid(vcpu); > } > > for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
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