linux-kernel - [PATCH v2 5/7] KVM: x86: Fold kvm_get_apic_interrupt() into kvm_cpu_get

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Message-ID: <20240906043413.1049633-6-seanjc@google.com>
Date: Thu,  5 Sep 2024 21:34:11 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Nathan Chancellor <nathan@...nel.org>, Chao Gao <chao.gao@...el.com>, 
	Zeng Guang <guang.zeng@...el.com>
Subject: [PATCH v2 5/7] KVM: x86: Fold kvm_get_apic_interrupt() into kvm_cpu_get_interrupt()

Fold kvm_get_apic_interrupt() into kvm_cpu_get_interrupt() now that nVMX
essentially open codes kvm_get_apic_interrupt() in order to correctly
emulate nested posted interrupts.

Opportunistically stop exporting kvm_cpu_get_interrupt(), as the
aforementioned nVMX flow was the only user in vendor code.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/kvm/irq.c   |  7 +++++--
 arch/x86/kvm/lapic.c | 10 ----------
 arch/x86/kvm/lapic.h |  1 -
 3 files changed, 5 insertions(+), 13 deletions(-)

diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c
index 810da99ff7ed..63f66c51975a 100644
--- a/arch/x86/kvm/irq.c
+++ b/arch/x86/kvm/irq.c
@@ -142,9 +142,12 @@ int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
 	if (vector != -1)
 		return vector;			/* PIC */
 
-	return kvm_get_apic_interrupt(v);	/* APIC */
+	vector = kvm_apic_has_interrupt(v);	/* APIC */
+	if (vector != -1)
+		kvm_apic_ack_interrupt(v, vector);
+
+	return vector;
 }
-EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);
 
 void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
 {
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index ff63ef8163a9..5c820e3f06a8 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2961,16 +2961,6 @@ void kvm_apic_ack_interrupt(struct kvm_vcpu *vcpu, int vector)
 }
 EXPORT_SYMBOL_GPL(kvm_apic_ack_interrupt);
 
-int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu)
-{
-	int vector = kvm_apic_has_interrupt(vcpu);
-
-	if (vector != -1)
-		kvm_apic_ack_interrupt(vcpu, vector);
-
-	return vector;
-}
-
 static int kvm_apic_state_fixup(struct kvm_vcpu *vcpu,
 		struct kvm_lapic_state *s, bool set)
 {
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index db80a2965b9c..8310ff74be29 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -90,7 +90,6 @@ void kvm_free_lapic(struct kvm_vcpu *vcpu);
 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
 void kvm_apic_ack_interrupt(struct kvm_vcpu *vcpu, int vector);
 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
-int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
 int kvm_apic_accept_events(struct kvm_vcpu *vcpu);
 void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event);
 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
-- 
2.46.0.469.g59c65b2a67-goog