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