2 * Copyright (C) 2015, 2016 ARM Ltd.
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.
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.
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/>.
17 #include <linux/kvm.h>
18 #include <linux/kvm_host.h>
19 #include <trace/events/kvm.h>
20 #include <kvm/arm_vgic.h>
24 * vgic_irqfd_set_irq: inject the IRQ corresponding to the
25 * irqchip routing entry
27 * This is the entry point for irqfd IRQ injection
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
)
33 unsigned int spi_id
= e
->irqchip
.pin
+ VGIC_NR_PRIVATE_IRQS
;
35 if (!vgic_valid_spi(kvm
, spi_id
))
37 return kvm_vgic_inject_irq(kvm
, 0, spi_id
, level
);
41 * kvm_set_routing_entry: populate a kvm routing entry
42 * from a user routing entry
44 * @kvm: the VM this entry is applied to
45 * @e: kvm kernel routing entry handle
46 * @ue: user api routing entry handle
47 * return 0 on success, -EINVAL on errors.
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
)
54 /* Remove this version and the ifdefery once merged into 4.8 */
55 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry
*e
,
56 const struct kvm_irq_routing_entry
*ue
)
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
))
70 case KVM_IRQ_ROUTING_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
;
87 * kvm_set_msi: inject the MSI corresponding to the
90 * This is the entry point for irqfd MSI injection
91 * and userspace MSI injection.
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
)
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
;
105 if (!vgic_has_its(kvm
))
108 return vgic_its_inject_msi(kvm
, &msi
);
111 int kvm_vgic_setup_default_irq_routing(struct kvm
*kvm
)
113 struct kvm_irq_routing_entry
*entries
;
114 struct vgic_dist
*dist
= &kvm
->arch
.vgic
;
115 u32 nr
= dist
->nr_spis
;
118 entries
= kcalloc(nr
, sizeof(struct kvm_kernel_irq_routing_entry
),
123 for (i
= 0; i
< nr
; i
++) {
125 entries
[i
].type
= KVM_IRQ_ROUTING_IRQCHIP
;
126 entries
[i
].u
.irqchip
.irqchip
= 0;
127 entries
[i
].u
.irqchip
.pin
= i
;
129 ret
= kvm_set_irq_routing(kvm
, entries
, nr
, 0);