| Message ID | 20220308163926.563994-12-suravee.suthikulpanit@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introducing AMD x2APIC Virtualization (x2AVIC) support. | expand |
On Tue, 2022-03-08 at 10:39 -0600, Suravee Suthikulpanit wrote: > Originalliy, this WARN_ON is designed to detect when calling > avic_vcpu_load() on an already running vcpu in AVIC mode (i.e. the AVIC > is_running bit is set). > > However, for x2AVIC, the vCPU can switch from xAPIC to x2APIC mode while in > running state, in which the avic_vcpu_load() will be called from > svm_refresh_apicv_exec_ctrl(). > > Therefore, remove this warning since it is no longer appropriate. > > Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> > --- > arch/x86/kvm/svm/avic.c | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c > index b8d6bf6b6ed5..015888aad8fc 100644 > --- a/arch/x86/kvm/svm/avic.c > +++ b/arch/x86/kvm/svm/avic.c > @@ -1038,7 +1038,6 @@ void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu) > return; > > entry = READ_ONCE(*(svm->avic_physical_id_cache)); > - WARN_ON(entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK); > > entry &= ~AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK; > entry |= (h_physical_id & AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK); Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Best regards, Maxim Levitsky
diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c index b8d6bf6b6ed5..015888aad8fc 100644 --- a/arch/x86/kvm/svm/avic.c +++ b/arch/x86/kvm/svm/avic.c @@ -1038,7 +1038,6 @@ void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu) return; entry = READ_ONCE(*(svm->avic_physical_id_cache)); - WARN_ON(entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK); entry &= ~AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK; entry |= (h_physical_id & AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK);
Originalliy, this WARN_ON is designed to detect when calling avic_vcpu_load() on an already running vcpu in AVIC mode (i.e. the AVIC is_running bit is set). However, for x2AVIC, the vCPU can switch from xAPIC to x2APIC mode while in running state, in which the avic_vcpu_load() will be called from svm_refresh_apicv_exec_ctrl(). Therefore, remove this warning since it is no longer appropriate. Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> --- arch/x86/kvm/svm/avic.c | 1 - 1 file changed, 1 deletion(-)