KVM: x86: Drop @vcpu parameter from kvm_x86_ops.hwapic_isr_update()

Drop the unused @vcpu parameter from hwapic_isr_update().  AMD/AVIC is
unlikely to implement the helper, and VMX/APICv doesn't need the vCPU as
it operates on the current VMCS.  The result is somewhat odd, but allows
for a decent amount of (future) cleanup in the APIC code.

No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220614230548.3852141-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/include/asm/kvm_host.h

@@ -1517,7 +1517,7 @@ struct kvm_x86_ops {
 	bool (*check_apicv_inhibit_reasons)(enum kvm_apicv_inhibit reason);
 	void (*refresh_apicv_exec_ctrl)(struct kvm_vcpu *vcpu);
 	void (*hwapic_irr_update)(struct kvm_vcpu *vcpu, int max_irr);
-	void (*hwapic_isr_update)(struct kvm_vcpu *vcpu, int isr);
+	void (*hwapic_isr_update)(int isr);
 	bool (*guest_apic_has_interrupt)(struct kvm_vcpu *vcpu);
 	void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
 	void (*set_virtual_apic_mode)(struct kvm_vcpu *vcpu);

arch/x86/kvm/lapic.c

@@ -556,7 +556,7 @@ static inline void apic_set_isr(int vec, struct kvm_lapic *apic)
 	 * just set SVI.
 	 */
 	if (unlikely(vcpu->arch.apicv_active))
-		static_call_cond(kvm_x86_hwapic_isr_update)(vcpu, vec);
+		static_call_cond(kvm_x86_hwapic_isr_update)(vec);
 	else {
 		++apic->isr_count;
 		BUG_ON(apic->isr_count > MAX_APIC_VECTOR);
@@ -604,7 +604,7 @@ static inline void apic_clear_isr(int vec, struct kvm_lapic *apic)
 	 * and must be left alone.
 	 */
 	if (unlikely(vcpu->arch.apicv_active))
-		static_call_cond(kvm_x86_hwapic_isr_update)(vcpu, apic_find_highest_isr(apic));
+		static_call_cond(kvm_x86_hwapic_isr_update)(apic_find_highest_isr(apic));
 	else {
 		--apic->isr_count;
 		BUG_ON(apic->isr_count < 0);
@@ -2457,7 +2457,7 @@ void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event)
 	if (vcpu->arch.apicv_active) {
 		static_call_cond(kvm_x86_apicv_post_state_restore)(vcpu);
 		static_call_cond(kvm_x86_hwapic_irr_update)(vcpu, -1);
-		static_call_cond(kvm_x86_hwapic_isr_update)(vcpu, -1);
+		static_call_cond(kvm_x86_hwapic_isr_update)(-1);
 	}
 
 	vcpu->arch.apic_arb_prio = 0;
@@ -2737,7 +2737,7 @@ int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s)
 	if (vcpu->arch.apicv_active) {
 		static_call_cond(kvm_x86_apicv_post_state_restore)(vcpu);
 		static_call_cond(kvm_x86_hwapic_irr_update)(vcpu, apic_find_highest_irr(apic));
-		static_call_cond(kvm_x86_hwapic_isr_update)(vcpu, apic_find_highest_isr(apic));
+		static_call_cond(kvm_x86_hwapic_isr_update)(apic_find_highest_isr(apic));
 	}
 	kvm_make_request(KVM_REQ_EVENT, vcpu);
 	if (ioapic_in_kernel(vcpu->kvm))

arch/x86/kvm/vmx/vmx.c

@@ -6566,7 +6566,7 @@ static void vmx_set_apic_access_page_addr(struct kvm_vcpu *vcpu)
 	put_page(page);
 }
 
-static void vmx_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr)
+static void vmx_hwapic_isr_update(int max_isr)
 {
 	u16 status;
 	u8 old;