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caab277b | 1 | // SPDX-License-Identifier: GPL-2.0-only |
03f0c94c AP |
2 | /* |
3 | * Copyright (C) 2015, 2016 ARM Ltd. | |
03f0c94c AP |
4 | */ |
5 | ||
6 | #include <linux/kvm.h> | |
7 | #include <linux/kvm_host.h> | |
8 | #include <trace/events/kvm.h> | |
180ae7b1 EA |
9 | #include <kvm/arm_vgic.h> |
10 | #include "vgic.h" | |
03f0c94c | 11 | |
180ae7b1 EA |
12 | /** |
13 | * vgic_irqfd_set_irq: inject the IRQ corresponding to the | |
14 | * irqchip routing entry | |
15 | * | |
16 | * This is the entry point for irqfd IRQ injection | |
17 | */ | |
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) | |
03f0c94c | 21 | { |
180ae7b1 EA |
22 | unsigned int spi_id = e->irqchip.pin + VGIC_NR_PRIVATE_IRQS; |
23 | ||
24 | if (!vgic_valid_spi(kvm, spi_id)) | |
25 | return -EINVAL; | |
cb3f0ad8 | 26 | return kvm_vgic_inject_irq(kvm, 0, spi_id, level, NULL); |
03f0c94c AP |
27 | } |
28 | ||
180ae7b1 EA |
29 | /** |
30 | * kvm_set_routing_entry: populate a kvm routing entry | |
31 | * from a user routing entry | |
32 | * | |
3f312db6 | 33 | * @kvm: the VM this entry is applied to |
180ae7b1 EA |
34 | * @e: kvm kernel routing entry handle |
35 | * @ue: user api routing entry handle | |
36 | * return 0 on success, -EINVAL on errors. | |
37 | */ | |
3f312db6 MZ |
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) | |
03f0c94c | 41 | { |
180ae7b1 EA |
42 | int r = -EINVAL; |
43 | ||
44 | switch (ue->type) { | |
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)) | |
51 | goto out; | |
52 | break; | |
995a0ee9 EA |
53 | case KVM_IRQ_ROUTING_MSI: |
54 | e->set = kvm_set_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; | |
60 | break; | |
180ae7b1 EA |
61 | default: |
62 | goto out; | |
63 | } | |
64 | r = 0; | |
65 | out: | |
66 | return r; | |
03f0c94c AP |
67 | } |
68 | ||
180ae7b1 EA |
69 | /** |
70 | * kvm_set_msi: inject the MSI corresponding to the | |
71 | * MSI routing entry | |
72 | * | |
73 | * This is the entry point for irqfd MSI injection | |
74 | * and userspace MSI injection. | |
75 | */ | |
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) | |
03f0c94c | 79 | { |
180ae7b1 | 80 | struct kvm_msi msi; |
03f0c94c | 81 | |
180ae7b1 EA |
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; | |
03f0c94c | 87 | |
180ae7b1 EA |
88 | if (!vgic_has_its(kvm)) |
89 | return -ENODEV; | |
03f0c94c | 90 | |
0bdbf3b0 SD |
91 | if (!level) |
92 | return -1; | |
93 | ||
180ae7b1 | 94 | return vgic_its_inject_msi(kvm, &msi); |
03f0c94c AP |
95 | } |
96 | ||
180ae7b1 | 97 | int kvm_vgic_setup_default_irq_routing(struct kvm *kvm) |
03f0c94c | 98 | { |
180ae7b1 EA |
99 | struct kvm_irq_routing_entry *entries; |
100 | struct vgic_dist *dist = &kvm->arch.vgic; | |
101 | u32 nr = dist->nr_spis; | |
102 | int i, ret; | |
103 | ||
150009e2 | 104 | entries = kcalloc(nr, sizeof(*entries), GFP_KERNEL); |
180ae7b1 EA |
105 | if (!entries) |
106 | return -ENOMEM; | |
107 | ||
108 | for (i = 0; i < nr; i++) { | |
109 | entries[i].gsi = i; | |
110 | entries[i].type = KVM_IRQ_ROUTING_IRQCHIP; | |
111 | entries[i].u.irqchip.irqchip = 0; | |
112 | entries[i].u.irqchip.pin = i; | |
113 | } | |
114 | ret = kvm_set_irq_routing(kvm, entries, nr, 0); | |
115 | kfree(entries); | |
116 | return ret; | |
03f0c94c | 117 | } |