summaryrefslogtreecommitdiffstats
path: root/virt/kvm/arm/vgic.h
blob: 0df74cbb6200686ab8cfbc853b11f27cc954b678 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/*
 * Copyright (C) 2012-2014 ARM Ltd.
 * Author: Marc Zyngier <marc.zyngier@arm.com>
 *
 * Derived from virt/kvm/arm/vgic.c
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __KVM_VGIC_H__
#define __KVM_VGIC_H__

#include <kvm/iodev.h>

#define VGIC_ADDR_UNDEF		(-1)
#define IS_VGIC_ADDR_UNDEF(_x)  ((_x) == VGIC_ADDR_UNDEF)

#define PRODUCT_ID_KVM		0x4b	/* ASCII code K */
#define IMPLEMENTER_ARM		0x43b

#define ACCESS_READ_VALUE	(1 << 0)
#define ACCESS_READ_RAZ		(0 << 0)
#define ACCESS_READ_MASK(x)	((x) & (1 << 0))
#define ACCESS_WRITE_IGNORED	(0 << 1)
#define ACCESS_WRITE_SETBIT	(1 << 1)
#define ACCESS_WRITE_CLEARBIT	(2 << 1)
#define ACCESS_WRITE_VALUE	(3 << 1)
#define ACCESS_WRITE_MASK(x)	((x) & (3 << 1))

#define VCPU_NOT_ALLOCATED	((u8)-1)

unsigned long *vgic_bitmap_get_shared_map(struct vgic_bitmap *x);

void vgic_update_state(struct kvm *kvm);
int vgic_init_common_maps(struct kvm *kvm);

u32 *vgic_bitmap_get_reg(struct vgic_bitmap *x, int cpuid, u32 offset);
u32 *vgic_bytemap_get_reg(struct vgic_bytemap *x, int cpuid, u32 offset);

void vgic_dist_irq_set_pending(struct kvm_vcpu *vcpu, int irq);
void vgic_dist_irq_clear_pending(struct kvm_vcpu *vcpu, int irq);
void vgic_cpu_irq_clear(struct kvm_vcpu *vcpu, int irq);
void vgic_bitmap_set_irq_val(struct vgic_bitmap *x, int cpuid,
			     int irq, int val);

void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);

bool vgic_queue_irq(struct kvm_vcpu *vcpu, u8 sgi_source_id, int irq);
void vgic_unqueue_irqs(struct kvm_vcpu *vcpu);

struct kvm_exit_mmio {
	phys_addr_t	phys_addr;
	void		*data;
	u32		len;
	bool		is_write;
	void		*private;
};

void vgic_reg_access(struct kvm_exit_mmio *mmio, u32 *reg,
		     phys_addr_t offset, int mode);
bool handle_mmio_raz_wi(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,
			phys_addr_t offset);

static inline
u32 mmio_data_read(struct kvm_exit_mmio *mmio, u32 mask)
{
	return le32_to_cpu(*((u32 *)mmio->data)) & mask;
}

static inline
void mmio_data_write(struct kvm_exit_mmio *mmio, u32 mask, u32 value)
{
	*((u32 *)mmio->data) = cpu_to_le32(value) & mask;
}

struct vgic_io_range {
	phys_addr_t base;
	unsigned long len;
	int bits_per_irq;
	bool (*handle_mmio)(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,
			    phys_addr_t offset);
};

int vgic_register_kvm_io_dev(struct kvm *kvm, gpa_t base, int len,
			     const struct vgic_io_range *ranges,
			     int redist_id,
			     struct vgic_io_device *iodev);

static inline bool is_in_range(phys_addr_t addr, unsigned long len,
			       phys_addr_t baseaddr, unsigned long size)
{
	return (addr >= baseaddr) && (addr + len <= baseaddr + size);
}

const
struct vgic_io_range *vgic_find_range(const struct vgic_io_range *ranges,
				      int len, gpa_t offset);

bool vgic_handle_enable_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,
			    phys_addr_t offset, int vcpu_id, int access);

bool vgic_handle_set_pending_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,
				 phys_addr_t offset, int vcpu_id);

bool vgic_handle_clear_pending_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,
				   phys_addr_t offset, int vcpu_id);

bool vgic_handle_set_active_reg(struct kvm *kvm,
				struct kvm_exit_mmio *mmio,
				phys_addr_t offset, int vcpu_id);

bool vgic_handle_clear_active_reg(struct kvm *kvm,
				  struct kvm_exit_mmio *mmio,
				  phys_addr_t offset, int vcpu_id);

bool vgic_handle_cfg_reg(u32 *reg, struct kvm_exit_mmio *mmio,
			 phys_addr_t offset);

void vgic_kick_vcpus(struct kvm *kvm);

int vgic_has_attr_regs(const struct vgic_io_range *ranges, phys_addr_t offset);
int vgic_set_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr);
int vgic_get_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr);

int vgic_init(struct kvm *kvm);
void vgic_v2_init_emulation(struct kvm *kvm);
void vgic_v3_init_emulation(struct kvm *kvm);

#endif