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Message-ID: <20251206004311.479939-7-seanjc@google.com>
Date: Fri, 5 Dec 2025 16:43:08 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>, David Woodhouse <dwmw2@...radead.org>, Paul Durrant <paul@....org>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 6/9] KVM: x86: Add a wrapper to handle common case of IRQ
delivery without dest_map
Turn kvm_irq_delivery_to_apic() into a wrapper that passes NULL for the
@dest_map param, as only the ugly I/O APIC RTC hackery needs to know which
vCPUs received the IRQ.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
arch/x86/kvm/hyperv.c | 2 +-
arch/x86/kvm/ioapic.c | 6 +++---
arch/x86/kvm/irq.c | 4 ++--
arch/x86/kvm/lapic.c | 23 ++++++++++++++++-------
arch/x86/kvm/lapic.h | 16 ++++++++++++----
arch/x86/kvm/x86.c | 2 +-
arch/x86/kvm/xen.c | 2 +-
7 files changed, 36 insertions(+), 19 deletions(-)
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index de92292eb1f5..49bf744ca8e3 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -492,7 +492,7 @@ static int synic_set_irq(struct kvm_vcpu_hv_synic *synic, u32 sint)
irq.vector = vector;
irq.level = 1;
- ret = kvm_irq_delivery_to_apic(vcpu->kvm, vcpu->arch.apic, &irq, NULL);
+ ret = kvm_irq_delivery_to_apic(vcpu->kvm, vcpu->arch.apic, &irq);
trace_kvm_hv_synic_set_irq(vcpu->vcpu_id, sint, irq.vector, ret);
return ret;
}
diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
index 955c781ba623..4b49f9728362 100644
--- a/arch/x86/kvm/ioapic.c
+++ b/arch/x86/kvm/ioapic.c
@@ -485,11 +485,11 @@ static int ioapic_service(struct kvm_ioapic *ioapic, int irq, bool line_status)
* if rtc_irq_check_coalesced returns false).
*/
BUG_ON(ioapic->rtc_status.pending_eoi != 0);
- ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe,
- &ioapic->rtc_status.dest_map);
+ ret = __kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe,
+ &ioapic->rtc_status.dest_map);
ioapic->rtc_status.pending_eoi = (ret < 0 ? 0 : ret);
} else
- ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe, NULL);
+ ret = kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe);
if (ret && irqe.trig_mode == IOAPIC_LEVEL_TRIG)
entry->fields.remote_irr = 1;
diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c
index 7cc8950005b6..a52115441c07 100644
--- a/arch/x86/kvm/irq.c
+++ b/arch/x86/kvm/irq.c
@@ -235,7 +235,7 @@ int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
kvm_msi_to_lapic_irq(kvm, e, &irq);
- return kvm_irq_delivery_to_apic(kvm, NULL, &irq, NULL);
+ return kvm_irq_delivery_to_apic(kvm, NULL, &irq);
}
int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
@@ -258,7 +258,7 @@ int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
kvm_msi_to_lapic_irq(kvm, e, &irq);
- if (kvm_irq_delivery_to_apic_fast(kvm, NULL, &irq, &r, NULL))
+ if (kvm_irq_delivery_to_apic_fast(kvm, NULL, &irq, &r))
return r;
break;
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 785c0352fa0e..769facb27d3d 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1175,8 +1175,9 @@ static inline bool kvm_apic_map_get_dest_lapic(struct kvm *kvm,
return true;
}
-bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
- struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map)
+static bool __kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
+ struct kvm_lapic_irq *irq, int *r,
+ struct dest_map *dest_map)
{
struct kvm_apic_map *map;
unsigned long bitmap;
@@ -1212,6 +1213,13 @@ bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
return ret;
}
+
+bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
+ struct kvm_lapic_irq *irq, int *r)
+{
+ return __kvm_irq_delivery_to_apic_fast(kvm, src, irq, r, NULL);
+}
+
/*
* This routine tries to handle interrupts in posted mode, here is how
* it deals with different cases:
@@ -1283,15 +1291,16 @@ bool kvm_intr_is_single_vcpu(struct kvm *kvm, struct kvm_lapic_irq *irq,
}
EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_intr_is_single_vcpu);
-int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
- struct kvm_lapic_irq *irq, struct dest_map *dest_map)
+int __kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
+ struct kvm_lapic_irq *irq,
+ struct dest_map *dest_map)
{
int r = -1;
struct kvm_vcpu *vcpu, *lowest = NULL;
unsigned long i, dest_vcpu_bitmap[BITS_TO_LONGS(KVM_MAX_VCPUS)];
unsigned int dest_vcpus = 0;
- if (kvm_irq_delivery_to_apic_fast(kvm, src, irq, &r, dest_map))
+ if (__kvm_irq_delivery_to_apic_fast(kvm, src, irq, &r, dest_map))
return r;
if (irq->dest_mode == APIC_DEST_PHYSICAL &&
@@ -1587,7 +1596,7 @@ void kvm_apic_send_ipi(struct kvm_lapic *apic, u32 icr_low, u32 icr_high)
trace_kvm_apic_ipi(icr_low, irq.dest_id);
- kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq, NULL);
+ kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq);
}
EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_apic_send_ipi);
@@ -2556,7 +2565,7 @@ static int __kvm_x2apic_icr_write(struct kvm_lapic *apic, u64 data, bool fast)
kvm_icr_to_lapic_irq(apic, (u32)data, (u32)(data >> 32), &irq);
if (!kvm_irq_delivery_to_apic_fast(apic->vcpu->kvm, apic, &irq,
- &ignored, NULL))
+ &ignored))
return -EWOULDBLOCK;
trace_kvm_apic_ipi((u32)data, irq.dest_id);
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 282b9b7da98c..901c05a5ac60 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -117,10 +117,18 @@ int kvm_alloc_apic_access_page(struct kvm *kvm);
void kvm_inhibit_apic_access_page(struct kvm_vcpu *vcpu);
bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
- struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map);
-int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
- struct kvm_lapic_irq *irq,
- struct dest_map *dest_map);
+ struct kvm_lapic_irq *irq, int *r);
+int __kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
+ struct kvm_lapic_irq *irq,
+ struct dest_map *dest_map);
+
+static inline int kvm_irq_delivery_to_apic(struct kvm *kvm,
+ struct kvm_lapic *src,
+ struct kvm_lapic_irq *irq)
+{
+ return __kvm_irq_delivery_to_apic(kvm, src, irq, NULL);
+}
+
void kvm_apic_send_ipi(struct kvm_lapic *apic, u32 icr_low, u32 icr_high);
int kvm_apic_set_base(struct kvm_vcpu *vcpu, u64 value, bool host_initiated);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f582dac9ea0c..bf8059179edb 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -10245,7 +10245,7 @@ static void kvm_pv_kick_cpu_op(struct kvm *kvm, int apicid)
.dest_id = apicid,
};
- kvm_irq_delivery_to_apic(kvm, NULL, &lapic_irq, NULL);
+ kvm_irq_delivery_to_apic(kvm, NULL, &lapic_irq);
}
bool kvm_apicv_activated(struct kvm *kvm)
diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c
index d6b2a665b499..28eeb1b2a16c 100644
--- a/arch/x86/kvm/xen.c
+++ b/arch/x86/kvm/xen.c
@@ -626,7 +626,7 @@ void kvm_xen_inject_vcpu_vector(struct kvm_vcpu *v)
irq.delivery_mode = APIC_DM_FIXED;
irq.level = 1;
- kvm_irq_delivery_to_apic(v->kvm, NULL, &irq, NULL);
+ kvm_irq_delivery_to_apic(v->kvm, NULL, &irq);
}
/*
--
2.52.0.223.gf5cc29aaa4-goog
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