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03f0c94c AP |
1 | /* |
2 | * Copyright (C) 2015, 2016 ARM Ltd. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | */ | |
16 | ||
17 | #include <linux/kvm.h> | |
18 | #include <linux/kvm_host.h> | |
19 | #include <trace/events/kvm.h> | |
180ae7b1 EA |
20 | #include <kvm/arm_vgic.h> |
21 | #include "vgic.h" | |
03f0c94c | 22 | |
180ae7b1 EA |
23 | /** |
24 | * vgic_irqfd_set_irq: inject the IRQ corresponding to the | |
25 | * irqchip routing entry | |
26 | * | |
27 | * This is the entry point for irqfd IRQ injection | |
28 | */ | |
29 | static int vgic_irqfd_set_irq(struct kvm_kernel_irq_routing_entry *e, | |
30 | struct kvm *kvm, int irq_source_id, | |
31 | int level, bool line_status) | |
03f0c94c | 32 | { |
180ae7b1 EA |
33 | unsigned int spi_id = e->irqchip.pin + VGIC_NR_PRIVATE_IRQS; |
34 | ||
35 | if (!vgic_valid_spi(kvm, spi_id)) | |
36 | return -EINVAL; | |
37 | return kvm_vgic_inject_irq(kvm, 0, spi_id, level); | |
03f0c94c AP |
38 | } |
39 | ||
180ae7b1 EA |
40 | /** |
41 | * kvm_set_routing_entry: populate a kvm routing entry | |
42 | * from a user routing entry | |
43 | * | |
3f312db6 | 44 | * @kvm: the VM this entry is applied to |
180ae7b1 EA |
45 | * @e: kvm kernel routing entry handle |
46 | * @ue: user api routing entry handle | |
47 | * return 0 on success, -EINVAL on errors. | |
48 | */ | |
3f312db6 MZ |
49 | #ifdef KVM_CAP_X2APIC_API |
50 | int kvm_set_routing_entry(struct kvm *kvm, | |
51 | struct kvm_kernel_irq_routing_entry *e, | |
52 | const struct kvm_irq_routing_entry *ue) | |
53 | #else | |
54 | /* Remove this version and the ifdefery once merged into 4.8 */ | |
180ae7b1 EA |
55 | int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, |
56 | const struct kvm_irq_routing_entry *ue) | |
3f312db6 | 57 | #endif |
03f0c94c | 58 | { |
180ae7b1 EA |
59 | int r = -EINVAL; |
60 | ||
61 | switch (ue->type) { | |
62 | case KVM_IRQ_ROUTING_IRQCHIP: | |
63 | e->set = vgic_irqfd_set_irq; | |
64 | e->irqchip.irqchip = ue->u.irqchip.irqchip; | |
65 | e->irqchip.pin = ue->u.irqchip.pin; | |
66 | if ((e->irqchip.pin >= KVM_IRQCHIP_NUM_PINS) || | |
67 | (e->irqchip.irqchip >= KVM_NR_IRQCHIPS)) | |
68 | goto out; | |
69 | break; | |
995a0ee9 EA |
70 | case KVM_IRQ_ROUTING_MSI: |
71 | e->set = kvm_set_msi; | |
72 | e->msi.address_lo = ue->u.msi.address_lo; | |
73 | e->msi.address_hi = ue->u.msi.address_hi; | |
74 | e->msi.data = ue->u.msi.data; | |
75 | e->msi.flags = ue->flags; | |
76 | e->msi.devid = ue->u.msi.devid; | |
77 | break; | |
180ae7b1 EA |
78 | default: |
79 | goto out; | |
80 | } | |
81 | r = 0; | |
82 | out: | |
83 | return r; | |
03f0c94c AP |
84 | } |
85 | ||
180ae7b1 EA |
86 | /** |
87 | * kvm_set_msi: inject the MSI corresponding to the | |
88 | * MSI routing entry | |
89 | * | |
90 | * This is the entry point for irqfd MSI injection | |
91 | * and userspace MSI injection. | |
92 | */ | |
93 | int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, | |
94 | struct kvm *kvm, int irq_source_id, | |
95 | int level, bool line_status) | |
03f0c94c | 96 | { |
180ae7b1 | 97 | struct kvm_msi msi; |
03f0c94c | 98 | |
180ae7b1 EA |
99 | msi.address_lo = e->msi.address_lo; |
100 | msi.address_hi = e->msi.address_hi; | |
101 | msi.data = e->msi.data; | |
102 | msi.flags = e->msi.flags; | |
103 | msi.devid = e->msi.devid; | |
03f0c94c | 104 | |
180ae7b1 EA |
105 | if (!vgic_has_its(kvm)) |
106 | return -ENODEV; | |
03f0c94c | 107 | |
180ae7b1 | 108 | return vgic_its_inject_msi(kvm, &msi); |
03f0c94c AP |
109 | } |
110 | ||
180ae7b1 | 111 | int kvm_vgic_setup_default_irq_routing(struct kvm *kvm) |
03f0c94c | 112 | { |
180ae7b1 EA |
113 | struct kvm_irq_routing_entry *entries; |
114 | struct vgic_dist *dist = &kvm->arch.vgic; | |
115 | u32 nr = dist->nr_spis; | |
116 | int i, ret; | |
117 | ||
118 | entries = kcalloc(nr, sizeof(struct kvm_kernel_irq_routing_entry), | |
119 | GFP_KERNEL); | |
120 | if (!entries) | |
121 | return -ENOMEM; | |
122 | ||
123 | for (i = 0; i < nr; i++) { | |
124 | entries[i].gsi = i; | |
125 | entries[i].type = KVM_IRQ_ROUTING_IRQCHIP; | |
126 | entries[i].u.irqchip.irqchip = 0; | |
127 | entries[i].u.irqchip.pin = i; | |
128 | } | |
129 | ret = kvm_set_irq_routing(kvm, entries, nr, 0); | |
130 | kfree(entries); | |
131 | return ret; | |
03f0c94c | 132 | } |