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1a89dd91 | 1 | /* |
50926d82 | 2 | * Copyright (C) 2015, 2016 ARM Ltd. |
1a89dd91 MZ |
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 | |
50926d82 | 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
1a89dd91 | 15 | */ |
50926d82 MZ |
16 | #ifndef __KVM_ARM_VGIC_H |
17 | #define __KVM_ARM_VGIC_H | |
b18b5778 | 18 | |
b47ef92a MZ |
19 | #include <linux/kernel.h> |
20 | #include <linux/kvm.h> | |
b47ef92a MZ |
21 | #include <linux/irqreturn.h> |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/types.h> | |
6777f77f | 24 | #include <kvm/iodev.h> |
424c3383 | 25 | #include <linux/list.h> |
1a89dd91 | 26 | |
50926d82 MZ |
27 | #define VGIC_V3_MAX_CPUS 255 |
28 | #define VGIC_V2_MAX_CPUS 8 | |
29 | #define VGIC_NR_IRQS_LEGACY 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) | |
50926d82 MZ |
33 | #define VGIC_MAX_PRIVATE (VGIC_NR_PRIVATE_IRQS - 1) |
34 | #define VGIC_MAX_SPI 1019 | |
35 | #define VGIC_MAX_RESERVED 1023 | |
36 | #define VGIC_MIN_LPI 8192 | |
180ae7b1 | 37 | #define KVM_IRQCHIP_NUM_PINS (1020 - 32) |
8f186d52 | 38 | |
50926d82 MZ |
39 | enum vgic_type { |
40 | VGIC_V2, /* Good ol' GICv2 */ | |
41 | VGIC_V3, /* New fancy GICv3 */ | |
42 | }; | |
b47ef92a | 43 | |
50926d82 MZ |
44 | /* same for all guests, as depending only on the _host's_ GIC model */ |
45 | struct vgic_global { | |
46 | /* type of the host GIC */ | |
47 | enum vgic_type type; | |
b47ef92a | 48 | |
50926d82 MZ |
49 | /* Physical address of vgic virtual cpu interface */ |
50 | phys_addr_t vcpu_base; | |
b47ef92a | 51 | |
50926d82 MZ |
52 | /* virtual control interface mapping */ |
53 | void __iomem *vctrl_base; | |
b47ef92a | 54 | |
50926d82 MZ |
55 | /* Number of implemented list registers */ |
56 | int nr_lr; | |
8d5c6b06 | 57 | |
50926d82 MZ |
58 | /* Maintenance IRQ number */ |
59 | unsigned int maint_irq; | |
1a9b1305 | 60 | |
50926d82 MZ |
61 | /* maximum number of VCPUs allowed (GICv2 limits us to 8) */ |
62 | int max_gic_vcpus; | |
8d5c6b06 | 63 | |
50926d82 MZ |
64 | /* Only needed for the legacy KVM_CREATE_IRQCHIP */ |
65 | bool can_emulate_gicv2; | |
8d5c6b06 MZ |
66 | }; |
67 | ||
50926d82 | 68 | extern struct vgic_global kvm_vgic_global_state; |
beee38b9 | 69 | |
50926d82 MZ |
70 | #define VGIC_V2_MAX_LRS (1 << 6) |
71 | #define VGIC_V3_MAX_LRS 16 | |
72 | #define VGIC_V3_LR_INDEX(lr) (VGIC_V3_MAX_LRS - 1 - lr) | |
8d5c6b06 | 73 | |
50926d82 MZ |
74 | enum vgic_irq_config { |
75 | VGIC_CONFIG_EDGE = 0, | |
76 | VGIC_CONFIG_LEVEL | |
ca85f623 MZ |
77 | }; |
78 | ||
50926d82 MZ |
79 | struct vgic_irq { |
80 | spinlock_t irq_lock; /* Protects the content of the struct */ | |
3802411d | 81 | struct list_head lpi_list; /* Used to link all LPIs together */ |
50926d82 MZ |
82 | struct list_head ap_list; |
83 | ||
84 | struct kvm_vcpu *vcpu; /* SGIs and PPIs: The VCPU | |
85 | * SPIs and LPIs: The VCPU whose ap_list | |
86 | * this is queued on. | |
87 | */ | |
88 | ||
89 | struct kvm_vcpu *target_vcpu; /* The VCPU that this interrupt should | |
90 | * be sent to, as a result of the | |
91 | * targets reg (v2) or the | |
92 | * affinity reg (v3). | |
93 | */ | |
94 | ||
95 | u32 intid; /* Guest visible INTID */ | |
96 | bool pending; | |
97 | bool line_level; /* Level only */ | |
98 | bool soft_pending; /* Level only */ | |
99 | bool active; /* not used for LPIs */ | |
100 | bool enabled; | |
101 | bool hw; /* Tied to HW IRQ */ | |
5dd4b924 | 102 | struct kref refcount; /* Used for LPIs */ |
50926d82 MZ |
103 | u32 hwintid; /* HW INTID number */ |
104 | union { | |
105 | u8 targets; /* GICv2 target VCPUs mask */ | |
106 | u32 mpidr; /* GICv3 target VCPU */ | |
107 | }; | |
108 | u8 source; /* GICv2 SGIs only */ | |
109 | u8 priority; | |
110 | enum vgic_irq_config config; /* Level or edge */ | |
b26e5fda AP |
111 | }; |
112 | ||
50926d82 | 113 | struct vgic_register_region; |
59c5ab40 AP |
114 | struct vgic_its; |
115 | ||
116 | enum iodev_type { | |
117 | IODEV_CPUIF, | |
118 | IODEV_DIST, | |
119 | IODEV_REDIST, | |
120 | IODEV_ITS | |
121 | }; | |
50926d82 | 122 | |
6777f77f | 123 | struct vgic_io_device { |
50926d82 | 124 | gpa_t base_addr; |
59c5ab40 AP |
125 | union { |
126 | struct kvm_vcpu *redist_vcpu; | |
127 | struct vgic_its *its; | |
128 | }; | |
50926d82 | 129 | const struct vgic_register_region *regions; |
59c5ab40 | 130 | enum iodev_type iodev_type; |
50926d82 | 131 | int nr_regions; |
6777f77f AP |
132 | struct kvm_io_device dev; |
133 | }; | |
134 | ||
59c5ab40 AP |
135 | struct vgic_its { |
136 | /* The base address of the ITS control register frame */ | |
137 | gpa_t vgic_its_base; | |
138 | ||
139 | bool enabled; | |
1085fdc6 | 140 | bool initialized; |
59c5ab40 | 141 | struct vgic_io_device iodev; |
bb717644 | 142 | struct kvm_device *dev; |
424c3383 AP |
143 | |
144 | /* These registers correspond to GITS_BASER{0,1} */ | |
145 | u64 baser_device_table; | |
146 | u64 baser_coll_table; | |
147 | ||
148 | /* Protects the command queue */ | |
149 | struct mutex cmd_lock; | |
150 | u64 cbaser; | |
151 | u32 creadr; | |
152 | u32 cwriter; | |
153 | ||
154 | /* Protects the device and collection lists */ | |
155 | struct mutex its_lock; | |
156 | struct list_head device_list; | |
157 | struct list_head collection_list; | |
59c5ab40 AP |
158 | }; |
159 | ||
1a89dd91 | 160 | struct vgic_dist { |
f982cf4e | 161 | bool in_kernel; |
01ac5e34 | 162 | bool ready; |
50926d82 | 163 | bool initialized; |
b47ef92a | 164 | |
59892136 AP |
165 | /* vGIC model the kernel emulates for the guest (GICv2 or GICv3) */ |
166 | u32 vgic_model; | |
167 | ||
0e4e82f1 AP |
168 | /* Do injected MSIs require an additional device ID? */ |
169 | bool msis_require_devid; | |
170 | ||
50926d82 | 171 | int nr_spis; |
c1bfb577 | 172 | |
50926d82 | 173 | /* TODO: Consider moving to global state */ |
b47ef92a MZ |
174 | /* Virtual control interface mapping */ |
175 | void __iomem *vctrl_base; | |
176 | ||
50926d82 MZ |
177 | /* base addresses in guest physical address space: */ |
178 | gpa_t vgic_dist_base; /* distributor */ | |
a0675c25 | 179 | union { |
50926d82 MZ |
180 | /* either a GICv2 CPU interface */ |
181 | gpa_t vgic_cpu_base; | |
182 | /* or a number of GICv3 redistributor regions */ | |
183 | gpa_t vgic_redist_base; | |
a0675c25 | 184 | }; |
b47ef92a | 185 | |
50926d82 MZ |
186 | /* distributor enabled */ |
187 | bool enabled; | |
47a98b15 | 188 | |
50926d82 | 189 | struct vgic_irq *spis; |
b47ef92a | 190 | |
a9cf86f6 | 191 | struct vgic_io_device dist_iodev; |
0aa1de57 | 192 | |
1085fdc6 AP |
193 | bool has_its; |
194 | ||
0aa1de57 AP |
195 | /* |
196 | * Contains the attributes and gpa of the LPI configuration table. | |
197 | * Since we report GICR_TYPER.CommonLPIAff as 0b00, we can share | |
198 | * one address across all redistributors. | |
199 | * GICv3 spec: 6.1.2 "LPI Configuration tables" | |
200 | */ | |
201 | u64 propbaser; | |
3802411d AP |
202 | |
203 | /* Protects the lpi_list and the count value below. */ | |
204 | spinlock_t lpi_list_lock; | |
205 | struct list_head lpi_list_head; | |
206 | int lpi_list_count; | |
1a89dd91 MZ |
207 | }; |
208 | ||
eede821d MZ |
209 | struct vgic_v2_cpu_if { |
210 | u32 vgic_hcr; | |
211 | u32 vgic_vmcr; | |
212 | u32 vgic_misr; /* Saved only */ | |
2df36a5d CD |
213 | u64 vgic_eisr; /* Saved only */ |
214 | u64 vgic_elrsr; /* Saved only */ | |
eede821d | 215 | u32 vgic_apr; |
8f186d52 | 216 | u32 vgic_lr[VGIC_V2_MAX_LRS]; |
eede821d MZ |
217 | }; |
218 | ||
b2fb1c0d | 219 | struct vgic_v3_cpu_if { |
4f64cb65 | 220 | #ifdef CONFIG_KVM_ARM_VGIC_V3 |
b2fb1c0d MZ |
221 | u32 vgic_hcr; |
222 | u32 vgic_vmcr; | |
2f5fa41a | 223 | u32 vgic_sre; /* Restored only, change ignored */ |
b2fb1c0d MZ |
224 | u32 vgic_misr; /* Saved only */ |
225 | u32 vgic_eisr; /* Saved only */ | |
226 | u32 vgic_elrsr; /* Saved only */ | |
227 | u32 vgic_ap0r[4]; | |
228 | u32 vgic_ap1r[4]; | |
229 | u64 vgic_lr[VGIC_V3_MAX_LRS]; | |
230 | #endif | |
231 | }; | |
232 | ||
1a89dd91 | 233 | struct vgic_cpu { |
9d949dce | 234 | /* CPU vif control registers for world switch */ |
eede821d MZ |
235 | union { |
236 | struct vgic_v2_cpu_if vgic_v2; | |
b2fb1c0d | 237 | struct vgic_v3_cpu_if vgic_v3; |
eede821d | 238 | }; |
6c3d63c9 | 239 | |
50926d82 MZ |
240 | unsigned int used_lrs; |
241 | struct vgic_irq private_irqs[VGIC_NR_PRIVATE_IRQS]; | |
1a89dd91 | 242 | |
50926d82 | 243 | spinlock_t ap_list_lock; /* Protects the ap_list */ |
9d949dce | 244 | |
50926d82 MZ |
245 | /* |
246 | * List of IRQs that this VCPU should consider because they are either | |
247 | * Active or Pending (hence the name; AP list), or because they recently | |
248 | * were one of the two and need to be migrated off this list to another | |
249 | * VCPU. | |
250 | */ | |
251 | struct list_head ap_list_head; | |
495dd859 | 252 | |
50926d82 | 253 | u64 live_lrs; |
8f6cdc1c AP |
254 | |
255 | /* | |
256 | * Members below are used with GICv3 emulation only and represent | |
257 | * parts of the redistributor. | |
258 | */ | |
259 | struct vgic_io_device rd_iodev; | |
260 | struct vgic_io_device sgi_iodev; | |
0aa1de57 AP |
261 | |
262 | /* Contains the attributes and gpa of the LPI pending tables. */ | |
263 | u64 pendbaser; | |
264 | ||
265 | bool lpis_enabled; | |
50926d82 | 266 | }; |
1a89dd91 | 267 | |
ce01e4e8 | 268 | int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write); |
6c3d63c9 | 269 | void kvm_vgic_early_init(struct kvm *kvm); |
59892136 | 270 | int kvm_vgic_create(struct kvm *kvm, u32 type); |
c1bfb577 | 271 | void kvm_vgic_destroy(struct kvm *kvm); |
6c3d63c9 | 272 | void kvm_vgic_vcpu_early_init(struct kvm_vcpu *vcpu); |
c1bfb577 | 273 | void kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu); |
50926d82 MZ |
274 | int kvm_vgic_map_resources(struct kvm *kvm); |
275 | int kvm_vgic_hyp_init(void); | |
276 | ||
277 | int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid, | |
5863c2ce | 278 | bool level); |
50926d82 MZ |
279 | int kvm_vgic_inject_mapped_irq(struct kvm *kvm, int cpuid, unsigned int intid, |
280 | bool level); | |
281 | int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, u32 virt_irq, u32 phys_irq); | |
63306c28 | 282 | int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int virt_irq); |
e262f419 | 283 | bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int virt_irq); |
1a89dd91 | 284 | |
50926d82 MZ |
285 | int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu); |
286 | ||
f982cf4e | 287 | #define irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel)) |
50926d82 | 288 | #define vgic_initialized(k) ((k)->arch.vgic.initialized) |
c52edf5f | 289 | #define vgic_ready(k) ((k)->arch.vgic.ready) |
2defaff4 | 290 | #define vgic_valid_spi(k, i) (((i) >= VGIC_NR_PRIVATE_IRQS) && \ |
50926d82 MZ |
291 | ((i) < (k)->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS)) |
292 | ||
293 | bool kvm_vcpu_has_pending_irqs(struct kvm_vcpu *vcpu); | |
294 | void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu); | |
295 | void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu); | |
9d949dce | 296 | |
4f64cb65 | 297 | #ifdef CONFIG_KVM_ARM_VGIC_V3 |
50926d82 | 298 | void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg); |
b2fb1c0d | 299 | #else |
50926d82 | 300 | static inline void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg) |
b2fb1c0d | 301 | { |
b2fb1c0d MZ |
302 | } |
303 | #endif | |
8f186d52 | 304 | |
50926d82 MZ |
305 | /** |
306 | * kvm_vgic_get_max_vcpus - Get the maximum number of VCPUs allowed by HW | |
307 | * | |
308 | * The host's GIC naturally limits the maximum amount of VCPUs a guest | |
309 | * can use. | |
310 | */ | |
311 | static inline int kvm_vgic_get_max_vcpus(void) | |
312 | { | |
313 | return kvm_vgic_global_state.max_gic_vcpus; | |
314 | } | |
315 | ||
0e4e82f1 AP |
316 | int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi); |
317 | ||
180ae7b1 EA |
318 | /** |
319 | * kvm_vgic_setup_default_irq_routing: | |
320 | * Setup a default flat gsi routing table mapping all SPIs | |
321 | */ | |
322 | int kvm_vgic_setup_default_irq_routing(struct kvm *kvm); | |
323 | ||
50926d82 | 324 | #endif /* __KVM_ARM_VGIC_H */ |