diff options
| author | Sean Christopherson <seanjc@google.com> | 2025-08-05 12:05:10 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2025-08-19 11:59:32 -0700 |
| commit | 15daa58e78cef70945324db162d1afbf3f493fb6 (patch) | |
| tree | cd9e0cc61c34be22b873a844fabea29e03690136 | |
| parent | cc63f918a215a24a72992295566cab5f8f89b08e (diff) | |
KVM: x86: Add kvm_icr_to_lapic_irq() helper to allow for fastpath IPIs
Extract the code for converting an ICR message into a kvm_lapic_irq
structure into a local helper so that a fast-only IPI path can share the
conversion logic.
No functional change intended.
Link: https://lore.kernel.org/r/20250805190526.1453366-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | arch/x86/kvm/lapic.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 5bfa6ec324af..68fda104195c 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1474,24 +1474,30 @@ void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector) } EXPORT_SYMBOL_GPL(kvm_apic_set_eoi_accelerated); -void kvm_apic_send_ipi(struct kvm_lapic *apic, u32 icr_low, u32 icr_high) +static void kvm_icr_to_lapic_irq(struct kvm_lapic *apic, u32 icr_low, + u32 icr_high, struct kvm_lapic_irq *irq) { - struct kvm_lapic_irq irq; - /* KVM has no delay and should always clear the BUSY/PENDING flag. */ WARN_ON_ONCE(icr_low & APIC_ICR_BUSY); - irq.vector = icr_low & APIC_VECTOR_MASK; - irq.delivery_mode = icr_low & APIC_MODE_MASK; - irq.dest_mode = icr_low & APIC_DEST_MASK; - irq.level = (icr_low & APIC_INT_ASSERT) != 0; - irq.trig_mode = icr_low & APIC_INT_LEVELTRIG; - irq.shorthand = icr_low & APIC_SHORT_MASK; - irq.msi_redir_hint = false; + irq->vector = icr_low & APIC_VECTOR_MASK; + irq->delivery_mode = icr_low & APIC_MODE_MASK; + irq->dest_mode = icr_low & APIC_DEST_MASK; + irq->level = (icr_low & APIC_INT_ASSERT) != 0; + irq->trig_mode = icr_low & APIC_INT_LEVELTRIG; + irq->shorthand = icr_low & APIC_SHORT_MASK; + irq->msi_redir_hint = false; if (apic_x2apic_mode(apic)) - irq.dest_id = icr_high; + irq->dest_id = icr_high; else - irq.dest_id = GET_XAPIC_DEST_FIELD(icr_high); + irq->dest_id = GET_XAPIC_DEST_FIELD(icr_high); +} + +void kvm_apic_send_ipi(struct kvm_lapic *apic, u32 icr_low, u32 icr_high) +{ + struct kvm_lapic_irq irq; + + kvm_icr_to_lapic_irq(apic, icr_low, icr_high, &irq); trace_kvm_apic_ipi(icr_low, irq.dest_id); |