Commit 16e880bf authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Sean Christopherson
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KVM: x86: Introduce helper to check if auto-EOI is set in Hyper-V SynIC 



As a preparation to making Hyper-V emulation optional, create a dedicated
kvm_hv_synic_auto_eoi_set() helper to avoid extra ifdefs in lapic.c

No functional change intended.

Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Tested-by: default avatarJeremi Piotrowski <jpiotrowski@linux.microsoft.com>
Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/20231205103630.1391318-5-vkuznets@redhat.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 50a82b0e

arch/x86/kvm/hyperv.h

+6 −0
Original line number Diff line number Diff line
@@ -105,6 +105,12 @@ int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint); 
void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector);

int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages);



static inline bool kvm_hv_synic_auto_eoi_set(struct kvm_vcpu *vcpu, int vector)

{

	return to_hv_vcpu(vcpu) &&

	       test_bit(vector, to_hv_synic(vcpu)->auto_eoi_bitmap);

}



void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu);



bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu);

arch/x86/kvm/lapic.c

+1 −1
Original line number Diff line number Diff line
@@ -2905,7 +2905,7 @@ int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu) 
	 */



	apic_clear_irr(vector, apic);

	if (to_hv_vcpu(vcpu) && test_bit(vector, to_hv_synic(vcpu)->auto_eoi_bitmap)) {

	if (kvm_hv_synic_auto_eoi_set(vcpu, vector)) {

		/*

		 * For auto-EOI interrupts, there might be another pending

		 * interrupt above PPR, so check whether to raise another