Maxim Levitsky <mlevitsk@xxxxxxxxxx> writes:
> On Tue, 2021-05-18 at 16:43 +0200, Vitaly Kuznetsov wrote:
>> Now that APICv/AVIC enablement is kept in common 'enable_apicv' variable,
>> there's no need to call kvm_apicv_init() from vendor specific code.
>>
>> No functional change intended.
>
> Minor nitpick: I don't see any invert here, but rather
> a unification of SVM/VMX virtual apic enablement code.
> Maybe update the subject a bit?
It is a bit umbiguous in v2, I agree (v1 used hooks in vendor-specific
code so instead of calling to vendor-neutral kvm_apicv_init() from
vendor-specific svm_vm_init()/vmx_vm_init(), we were calling
vendor-specific hooks from vendor-neutral kvm_apicv_init(), thus
'invert'. We can update the subject to something like
"KVM: x86: Drop vendor specific functions for APICv/AVIC enablement"
or something like that.
>
> For the code:
>
> Reviewed-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
>
Thanks!
> Best regards,
> Maxim Levitsky
>
>>
>> Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
>> ---
>> arch/x86/include/asm/kvm_host.h | 1 -
>> arch/x86/kvm/svm/svm.c | 1 -
>> arch/x86/kvm/vmx/vmx.c | 1 -
>> arch/x86/kvm/x86.c | 6 +++---
>> 4 files changed, 3 insertions(+), 6 deletions(-)
>>
>> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
>> index a2197fcf0e7c..bf5807d35339 100644
>> --- a/arch/x86/include/asm/kvm_host.h
>> +++ b/arch/x86/include/asm/kvm_host.h
>> @@ -1662,7 +1662,6 @@ gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
>> struct x86_exception *exception);
>>
>> bool kvm_apicv_activated(struct kvm *kvm);
>> -void kvm_apicv_init(struct kvm *kvm, bool enable);
>> void kvm_vcpu_update_apicv(struct kvm_vcpu *vcpu);
>> void kvm_request_apicv_update(struct kvm *kvm, bool activate,
>> unsigned long bit);
>> diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
>> index 0d6ec34d1e4b..84f58e8b2f49 100644
>> --- a/arch/x86/kvm/svm/svm.c
>> +++ b/arch/x86/kvm/svm/svm.c
>> @@ -4438,7 +4438,6 @@ static int svm_vm_init(struct kvm *kvm)
>> return ret;
>> }
>>
>> - kvm_apicv_init(kvm, enable_apicv);
>> return 0;
>> }
>>
>> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
>> index 5e9ba10e9c2d..697dd54c7df8 100644
>> --- a/arch/x86/kvm/vmx/vmx.c
>> +++ b/arch/x86/kvm/vmx/vmx.c
>> @@ -7000,7 +7000,6 @@ static int vmx_vm_init(struct kvm *kvm)
>> break;
>> }
>> }
>> - kvm_apicv_init(kvm, enable_apicv);
>> return 0;
>> }
>>
>> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
>> index 23fdbba6b394..22a1e2b438c3 100644
>> --- a/arch/x86/kvm/x86.c
>> +++ b/arch/x86/kvm/x86.c
>> @@ -8345,16 +8345,15 @@ bool kvm_apicv_activated(struct kvm *kvm)
>> }
>> EXPORT_SYMBOL_GPL(kvm_apicv_activated);
>>
>> -void kvm_apicv_init(struct kvm *kvm, bool enable)
>> +static void kvm_apicv_init(struct kvm *kvm)
>> {
>> - if (enable)
>> + if (enable_apicv)
>> clear_bit(APICV_INHIBIT_REASON_DISABLE,
>> &kvm->arch.apicv_inhibit_reasons);
>> else
>> set_bit(APICV_INHIBIT_REASON_DISABLE,
>> &kvm->arch.apicv_inhibit_reasons);
>> }
>> -EXPORT_SYMBOL_GPL(kvm_apicv_init);
>>
>> static void kvm_sched_yield(struct kvm_vcpu *vcpu, unsigned long dest_id)
>> {
>> @@ -10739,6 +10738,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
>> INIT_DELAYED_WORK(&kvm->arch.kvmclock_update_work, kvmclock_update_fn);
>> INIT_DELAYED_WORK(&kvm->arch.kvmclock_sync_work, kvmclock_sync_fn);
>>
>> + kvm_apicv_init(kvm);
>> kvm_hv_init_vm(kvm);
>> kvm_page_track_init(kvm);
>> kvm_mmu_init_vm(kvm);
>
>
--
Vitaly
