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1/*
2 * Copyright (C) 2012-2014 ARM Ltd.
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
4 *
5 * Derived from virt/kvm/arm/vgic.c
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20#ifndef __KVM_VGIC_H__
21#define __KVM_VGIC_H__
22
23#include <kvm/iodev.h>
24
25#define VGIC_ADDR_UNDEF (-1)
26#define IS_VGIC_ADDR_UNDEF(_x) ((_x) == VGIC_ADDR_UNDEF)
27
28#define PRODUCT_ID_KVM 0x4b /* ASCII code K */
29#define IMPLEMENTER_ARM 0x43b
30
31#define ACCESS_READ_VALUE (1 << 0)
32#define ACCESS_READ_RAZ (0 << 0)
33#define ACCESS_READ_MASK(x) ((x) & (1 << 0))
34#define ACCESS_WRITE_IGNORED (0 << 1)
35#define ACCESS_WRITE_SETBIT (1 << 1)
36#define ACCESS_WRITE_CLEARBIT (2 << 1)
37#define ACCESS_WRITE_VALUE (3 << 1)
38#define ACCESS_WRITE_MASK(x) ((x) & (3 << 1))
39
40#define VCPU_NOT_ALLOCATED ((u8)-1)
41
42unsigned long *vgic_bitmap_get_shared_map(struct vgic_bitmap *x);
43
44void vgic_update_state(struct kvm *kvm);
45int vgic_init_common_maps(struct kvm *kvm);
46
47u32 *vgic_bitmap_get_reg(struct vgic_bitmap *x, int cpuid, u32 offset);
48u32 *vgic_bytemap_get_reg(struct vgic_bytemap *x, int cpuid, u32 offset);
49
50void vgic_dist_irq_set_pending(struct kvm_vcpu *vcpu, int irq);
51void vgic_dist_irq_clear_pending(struct kvm_vcpu *vcpu, int irq);
52void vgic_cpu_irq_clear(struct kvm_vcpu *vcpu, int irq);
53void vgic_bitmap_set_irq_val(struct vgic_bitmap *x, int cpuid,
54 int irq, int val);
55
56void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
57void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
58
59bool vgic_queue_irq(struct kvm_vcpu *vcpu, u8 sgi_source_id, int irq);
60void vgic_unqueue_irqs(struct kvm_vcpu *vcpu);
61
62struct kvm_exit_mmio {
63 phys_addr_t phys_addr;
64 void *data;
65 u32 len;
66 bool is_write;
67 void *private;
68};
69
70void vgic_reg_access(struct kvm_exit_mmio *mmio, u32 *reg,
71 phys_addr_t offset, int mode);
72bool handle_mmio_raz_wi(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,
73 phys_addr_t offset);
74
75static inline
76u32 mmio_data_read(struct kvm_exit_mmio *mmio, u32 mask)
77{
78 return le32_to_cpu(*((u32 *)mmio->data)) & mask;
79}
80
81static inline
82void mmio_data_write(struct kvm_exit_mmio *mmio, u32 mask, u32 value)
83{
84 *((u32 *)mmio->data) = cpu_to_le32(value) & mask;
85}
86
87struct vgic_io_range {
88 phys_addr_t base;
89 unsigned long len;
90 int bits_per_irq;
91 bool (*handle_mmio)(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,
92 phys_addr_t offset);
93};
94
95int vgic_register_kvm_io_dev(struct kvm *kvm, gpa_t base, int len,
96 const struct vgic_io_range *ranges,
97 int redist_id,
98 struct vgic_io_device *iodev);
99
100static inline bool is_in_range(phys_addr_t addr, unsigned long len,
101 phys_addr_t baseaddr, unsigned long size)
102{
103 return (addr >= baseaddr) && (addr + len <= baseaddr + size);
104}
105
106const
107struct vgic_io_range *vgic_find_range(const struct vgic_io_range *ranges,
108 int len, gpa_t offset);
109
110bool vgic_handle_enable_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,
111 phys_addr_t offset, int vcpu_id, int access);
112
113bool vgic_handle_set_pending_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,
114 phys_addr_t offset, int vcpu_id);
115
116bool vgic_handle_clear_pending_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,
117 phys_addr_t offset, int vcpu_id);
118
119bool vgic_handle_set_active_reg(struct kvm *kvm,
120 struct kvm_exit_mmio *mmio,
121 phys_addr_t offset, int vcpu_id);
122
123bool vgic_handle_clear_active_reg(struct kvm *kvm,
124 struct kvm_exit_mmio *mmio,
125 phys_addr_t offset, int vcpu_id);
126
127bool vgic_handle_cfg_reg(u32 *reg, struct kvm_exit_mmio *mmio,
128 phys_addr_t offset);
129
130void vgic_kick_vcpus(struct kvm *kvm);
131
132int vgic_has_attr_regs(const struct vgic_io_range *ranges, phys_addr_t offset);
133int vgic_set_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr);
134int vgic_get_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr);
135
136int vgic_init(struct kvm *kvm);
137void vgic_v2_init_emulation(struct kvm *kvm);
138void vgic_v3_init_emulation(struct kvm *kvm);
139
140#endif