1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2015, 2016 ARM Ltd.
7 #include <linux/kvm_host.h>
8 #include <trace/events/kvm.h>
9 #include <kvm/arm_vgic.h>
13 * vgic_irqfd_set_irq: inject the IRQ corresponding to the
14 * irqchip routing entry
16 * This is the entry point for irqfd IRQ injection
18 static int vgic_irqfd_set_irq(struct kvm_kernel_irq_routing_entry *e,
19 struct kvm *kvm, int irq_source_id,
20 int level, bool line_status)
22 unsigned int spi_id = e->irqchip.pin + VGIC_NR_PRIVATE_IRQS;
24 if (!vgic_valid_spi(kvm, spi_id))
26 return kvm_vgic_inject_irq(kvm, 0, spi_id, level, NULL);
30 * kvm_set_routing_entry: populate a kvm routing entry
31 * from a user routing entry
33 * @kvm: the VM this entry is applied to
34 * @e: kvm kernel routing entry handle
35 * @ue: user api routing entry handle
36 * return 0 on success, -EINVAL on errors.
38 int kvm_set_routing_entry(struct kvm *kvm,
39 struct kvm_kernel_irq_routing_entry *e,
40 const struct kvm_irq_routing_entry *ue)
45 case KVM_IRQ_ROUTING_IRQCHIP:
46 e->set = vgic_irqfd_set_irq;
47 e->irqchip.irqchip = ue->u.irqchip.irqchip;
48 e->irqchip.pin = ue->u.irqchip.pin;
49 if ((e->irqchip.pin >= KVM_IRQCHIP_NUM_PINS) ||
50 (e->irqchip.irqchip >= KVM_NR_IRQCHIPS))
53 case KVM_IRQ_ROUTING_MSI:
55 e->msi.address_lo = ue->u.msi.address_lo;
56 e->msi.address_hi = ue->u.msi.address_hi;
57 e->msi.data = ue->u.msi.data;
58 e->msi.flags = ue->flags;
59 e->msi.devid = ue->u.msi.devid;
70 * kvm_set_msi: inject the MSI corresponding to the
73 * This is the entry point for irqfd MSI injection
74 * and userspace MSI injection.
76 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
77 struct kvm *kvm, int irq_source_id,
78 int level, bool line_status)
82 msi.address_lo = e->msi.address_lo;
83 msi.address_hi = e->msi.address_hi;
84 msi.data = e->msi.data;
85 msi.flags = e->msi.flags;
86 msi.devid = e->msi.devid;
88 if (!vgic_has_its(kvm))
94 return vgic_its_inject_msi(kvm, &msi);
97 int kvm_vgic_setup_default_irq_routing(struct kvm *kvm)
99 struct kvm_irq_routing_entry *entries;
100 struct vgic_dist *dist = &kvm->arch.vgic;
101 u32 nr = dist->nr_spis;
104 entries = kcalloc(nr, sizeof(*entries), GFP_KERNEL);
108 for (i = 0; i < nr; i++) {
110 entries[i].type = KVM_IRQ_ROUTING_IRQCHIP;
111 entries[i].u.irqchip.irqchip = 0;
112 entries[i].u.irqchip.pin = i;
114 ret = kvm_set_irq_routing(kvm, entries, nr, 0);