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1a89dd91 MZ |
1 | /* |
2 | * Copyright (C) 2012 ARM Ltd. | |
3 | * Author: Marc Zyngier <marc.zyngier@arm.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
17 | */ | |
18 | ||
19 | #ifndef __ASM_ARM_KVM_VGIC_H | |
20 | #define __ASM_ARM_KVM_VGIC_H | |
21 | ||
b47ef92a MZ |
22 | #include <linux/kernel.h> |
23 | #include <linux/kvm.h> | |
b47ef92a MZ |
24 | #include <linux/irqreturn.h> |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/types.h> | |
1a89dd91 MZ |
27 | #include <linux/irqchip/arm-gic.h> |
28 | ||
9b2d2e0d | 29 | #define VGIC_NR_IRQS 256 |
b47ef92a MZ |
30 | #define VGIC_NR_SGIS 16 |
31 | #define VGIC_NR_PPIS 16 | |
32 | #define VGIC_NR_PRIVATE_IRQS (VGIC_NR_SGIS + VGIC_NR_PPIS) | |
33 | #define VGIC_NR_SHARED_IRQS (VGIC_NR_IRQS - VGIC_NR_PRIVATE_IRQS) | |
34 | #define VGIC_MAX_CPUS KVM_MAX_VCPUS | |
9d949dce | 35 | #define VGIC_MAX_LRS (1 << 6) |
b47ef92a MZ |
36 | |
37 | /* Sanity checks... */ | |
38 | #if (VGIC_MAX_CPUS > 8) | |
39 | #error Invalid number of CPU interfaces | |
40 | #endif | |
41 | ||
42 | #if (VGIC_NR_IRQS & 31) | |
43 | #error "VGIC_NR_IRQS must be a multiple of 32" | |
44 | #endif | |
45 | ||
46 | #if (VGIC_NR_IRQS > 1024) | |
47 | #error "VGIC_NR_IRQS must be <= 1024" | |
48 | #endif | |
49 | ||
50 | /* | |
51 | * The GIC distributor registers describing interrupts have two parts: | |
52 | * - 32 per-CPU interrupts (SGI + PPI) | |
53 | * - a bunch of shared interrupts (SPI) | |
54 | */ | |
55 | struct vgic_bitmap { | |
56 | union { | |
57 | u32 reg[VGIC_NR_PRIVATE_IRQS / 32]; | |
58 | DECLARE_BITMAP(reg_ul, VGIC_NR_PRIVATE_IRQS); | |
59 | } percpu[VGIC_MAX_CPUS]; | |
60 | union { | |
61 | u32 reg[VGIC_NR_SHARED_IRQS / 32]; | |
62 | DECLARE_BITMAP(reg_ul, VGIC_NR_SHARED_IRQS); | |
63 | } shared; | |
64 | }; | |
65 | ||
66 | struct vgic_bytemap { | |
67 | u32 percpu[VGIC_MAX_CPUS][VGIC_NR_PRIVATE_IRQS / 4]; | |
68 | u32 shared[VGIC_NR_SHARED_IRQS / 4]; | |
69 | }; | |
70 | ||
8d5c6b06 MZ |
71 | struct kvm_vcpu; |
72 | ||
73 | #define LR_STATE_PENDING (1 << 0) | |
74 | #define LR_STATE_ACTIVE (1 << 1) | |
75 | #define LR_STATE_MASK (3 << 0) | |
76 | #define LR_EOI_INT (1 << 2) | |
77 | ||
78 | struct vgic_lr { | |
79 | u16 irq; | |
80 | u8 source; | |
81 | u8 state; | |
82 | }; | |
83 | ||
84 | struct vgic_ops { | |
85 | struct vgic_lr (*get_lr)(const struct kvm_vcpu *, int); | |
86 | void (*set_lr)(struct kvm_vcpu *, int, struct vgic_lr); | |
69bb2c9f MZ |
87 | void (*sync_lr_elrsr)(struct kvm_vcpu *, int, struct vgic_lr); |
88 | u64 (*get_elrsr)(const struct kvm_vcpu *vcpu); | |
8d6a0313 | 89 | u64 (*get_eisr)(const struct kvm_vcpu *vcpu); |
495dd859 | 90 | u32 (*get_interrupt_status)(const struct kvm_vcpu *vcpu); |
909d9b50 MZ |
91 | void (*enable_underflow)(struct kvm_vcpu *vcpu); |
92 | void (*disable_underflow)(struct kvm_vcpu *vcpu); | |
8d5c6b06 MZ |
93 | }; |
94 | ||
1a89dd91 | 95 | struct vgic_dist { |
b47ef92a MZ |
96 | #ifdef CONFIG_KVM_ARM_VGIC |
97 | spinlock_t lock; | |
01ac5e34 | 98 | bool ready; |
b47ef92a MZ |
99 | |
100 | /* Virtual control interface mapping */ | |
101 | void __iomem *vctrl_base; | |
102 | ||
330690cd CD |
103 | /* Distributor and vcpu interface mapping in the guest */ |
104 | phys_addr_t vgic_dist_base; | |
105 | phys_addr_t vgic_cpu_base; | |
b47ef92a MZ |
106 | |
107 | /* Distributor enabled */ | |
108 | u32 enabled; | |
109 | ||
110 | /* Interrupt enabled (one bit per IRQ) */ | |
111 | struct vgic_bitmap irq_enabled; | |
112 | ||
113 | /* Interrupt 'pin' level */ | |
114 | struct vgic_bitmap irq_state; | |
115 | ||
116 | /* Level-triggered interrupt in progress */ | |
117 | struct vgic_bitmap irq_active; | |
118 | ||
119 | /* Interrupt priority. Not used yet. */ | |
120 | struct vgic_bytemap irq_priority; | |
121 | ||
122 | /* Level/edge triggered */ | |
123 | struct vgic_bitmap irq_cfg; | |
124 | ||
125 | /* Source CPU per SGI and target CPU */ | |
126 | u8 irq_sgi_sources[VGIC_MAX_CPUS][VGIC_NR_SGIS]; | |
127 | ||
128 | /* Target CPU for each IRQ */ | |
129 | u8 irq_spi_cpu[VGIC_NR_SHARED_IRQS]; | |
130 | struct vgic_bitmap irq_spi_target[VGIC_MAX_CPUS]; | |
131 | ||
132 | /* Bitmap indicating which CPU has something pending */ | |
133 | unsigned long irq_pending_on_cpu; | |
134 | #endif | |
1a89dd91 MZ |
135 | }; |
136 | ||
eede821d MZ |
137 | struct vgic_v2_cpu_if { |
138 | u32 vgic_hcr; | |
139 | u32 vgic_vmcr; | |
140 | u32 vgic_misr; /* Saved only */ | |
141 | u32 vgic_eisr[2]; /* Saved only */ | |
142 | u32 vgic_elrsr[2]; /* Saved only */ | |
143 | u32 vgic_apr; | |
144 | u32 vgic_lr[VGIC_MAX_LRS]; | |
145 | }; | |
146 | ||
1a89dd91 | 147 | struct vgic_cpu { |
9d949dce MZ |
148 | #ifdef CONFIG_KVM_ARM_VGIC |
149 | /* per IRQ to LR mapping */ | |
150 | u8 vgic_irq_lr_map[VGIC_NR_IRQS]; | |
151 | ||
152 | /* Pending interrupts on this VCPU */ | |
153 | DECLARE_BITMAP( pending_percpu, VGIC_NR_PRIVATE_IRQS); | |
154 | DECLARE_BITMAP( pending_shared, VGIC_NR_SHARED_IRQS); | |
155 | ||
156 | /* Bitmap of used/free list registers */ | |
157 | DECLARE_BITMAP( lr_used, VGIC_MAX_LRS); | |
158 | ||
159 | /* Number of list registers on this CPU */ | |
160 | int nr_lr; | |
161 | ||
162 | /* CPU vif control registers for world switch */ | |
eede821d MZ |
163 | union { |
164 | struct vgic_v2_cpu_if vgic_v2; | |
165 | }; | |
9d949dce | 166 | #endif |
1a89dd91 MZ |
167 | }; |
168 | ||
9d949dce MZ |
169 | #define LR_EMPTY 0xff |
170 | ||
495dd859 MZ |
171 | #define INT_STATUS_EOI (1 << 0) |
172 | #define INT_STATUS_UNDERFLOW (1 << 1) | |
173 | ||
1a89dd91 MZ |
174 | struct kvm; |
175 | struct kvm_vcpu; | |
176 | struct kvm_run; | |
177 | struct kvm_exit_mmio; | |
178 | ||
179 | #ifdef CONFIG_KVM_ARM_VGIC | |
ce01e4e8 | 180 | int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write); |
01ac5e34 MZ |
181 | int kvm_vgic_hyp_init(void); |
182 | int kvm_vgic_init(struct kvm *kvm); | |
183 | int kvm_vgic_create(struct kvm *kvm); | |
184 | int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu); | |
9d949dce MZ |
185 | void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu); |
186 | void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu); | |
5863c2ce MZ |
187 | int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int irq_num, |
188 | bool level); | |
9d949dce | 189 | int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu); |
1a89dd91 MZ |
190 | bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run, |
191 | struct kvm_exit_mmio *mmio); | |
192 | ||
9d949dce | 193 | #define irqchip_in_kernel(k) (!!((k)->arch.vgic.vctrl_base)) |
01ac5e34 | 194 | #define vgic_initialized(k) ((k)->arch.vgic.ready) |
9d949dce | 195 | |
1a89dd91 MZ |
196 | #else |
197 | static inline int kvm_vgic_hyp_init(void) | |
198 | { | |
199 | return 0; | |
200 | } | |
201 | ||
330690cd CD |
202 | static inline int kvm_vgic_set_addr(struct kvm *kvm, unsigned long type, u64 addr) |
203 | { | |
204 | return 0; | |
205 | } | |
206 | ||
6cbde825 MZ |
207 | static inline int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write) |
208 | { | |
209 | return -ENXIO; | |
210 | } | |
211 | ||
1a89dd91 MZ |
212 | static inline int kvm_vgic_init(struct kvm *kvm) |
213 | { | |
214 | return 0; | |
215 | } | |
216 | ||
217 | static inline int kvm_vgic_create(struct kvm *kvm) | |
218 | { | |
219 | return 0; | |
220 | } | |
221 | ||
222 | static inline int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu) | |
223 | { | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static inline void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) {} | |
228 | static inline void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu) {} | |
229 | ||
5863c2ce MZ |
230 | static inline int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, |
231 | unsigned int irq_num, bool level) | |
232 | { | |
233 | return 0; | |
234 | } | |
235 | ||
1a89dd91 MZ |
236 | static inline int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu) |
237 | { | |
238 | return 0; | |
239 | } | |
240 | ||
241 | static inline bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run, | |
242 | struct kvm_exit_mmio *mmio) | |
243 | { | |
244 | return false; | |
245 | } | |
246 | ||
247 | static inline int irqchip_in_kernel(struct kvm *kvm) | |
248 | { | |
249 | return 0; | |
250 | } | |
01ac5e34 MZ |
251 | |
252 | static inline bool vgic_initialized(struct kvm *kvm) | |
253 | { | |
254 | return true; | |
255 | } | |
1a89dd91 MZ |
256 | #endif |
257 | ||
258 | #endif |