1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2015, 2016 ARM Ltd. 4 */ 5 #ifndef __KVM_ARM_VGIC_NEW_H__ 6 #define __KVM_ARM_VGIC_NEW_H__ 7 8 #include <linux/irqchip/arm-gic-common.h> 9 #include <asm/kvm_mmu.h> 10 11 #define PRODUCT_ID_KVM 0x4b /* ASCII code K */ 12 #define IMPLEMENTER_ARM 0x43b 13 14 #define VGIC_ADDR_UNDEF (-1) 15 #define IS_VGIC_ADDR_UNDEF(_x) ((_x) == VGIC_ADDR_UNDEF) 16 17 #define INTERRUPT_ID_BITS_SPIS 10 18 #define INTERRUPT_ID_BITS_ITS 16 19 #define VGIC_PRI_BITS 5 20 21 #define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS) 22 23 #define VGIC_AFFINITY_0_SHIFT 0 24 #define VGIC_AFFINITY_0_MASK (0xffUL << VGIC_AFFINITY_0_SHIFT) 25 #define VGIC_AFFINITY_1_SHIFT 8 26 #define VGIC_AFFINITY_1_MASK (0xffUL << VGIC_AFFINITY_1_SHIFT) 27 #define VGIC_AFFINITY_2_SHIFT 16 28 #define VGIC_AFFINITY_2_MASK (0xffUL << VGIC_AFFINITY_2_SHIFT) 29 #define VGIC_AFFINITY_3_SHIFT 24 30 #define VGIC_AFFINITY_3_MASK (0xffUL << VGIC_AFFINITY_3_SHIFT) 31 32 #define VGIC_AFFINITY_LEVEL(reg, level) \ 33 ((((reg) & VGIC_AFFINITY_## level ##_MASK) \ 34 >> VGIC_AFFINITY_## level ##_SHIFT) << MPIDR_LEVEL_SHIFT(level)) 35 36 /* 37 * The Userspace encodes the affinity differently from the MPIDR, 38 * Below macro converts vgic userspace format to MPIDR reg format. 39 */ 40 #define VGIC_TO_MPIDR(val) (VGIC_AFFINITY_LEVEL(val, 0) | \ 41 VGIC_AFFINITY_LEVEL(val, 1) | \ 42 VGIC_AFFINITY_LEVEL(val, 2) | \ 43 VGIC_AFFINITY_LEVEL(val, 3)) 44 45 /* 46 * As per Documentation/virt/kvm/devices/arm-vgic-v3.rst, 47 * below macros are defined for CPUREG encoding. 48 */ 49 #define KVM_REG_ARM_VGIC_SYSREG_OP0_MASK 0x000000000000c000 50 #define KVM_REG_ARM_VGIC_SYSREG_OP0_SHIFT 14 51 #define KVM_REG_ARM_VGIC_SYSREG_OP1_MASK 0x0000000000003800 52 #define KVM_REG_ARM_VGIC_SYSREG_OP1_SHIFT 11 53 #define KVM_REG_ARM_VGIC_SYSREG_CRN_MASK 0x0000000000000780 54 #define KVM_REG_ARM_VGIC_SYSREG_CRN_SHIFT 7 55 #define KVM_REG_ARM_VGIC_SYSREG_CRM_MASK 0x0000000000000078 56 #define KVM_REG_ARM_VGIC_SYSREG_CRM_SHIFT 3 57 #define KVM_REG_ARM_VGIC_SYSREG_OP2_MASK 0x0000000000000007 58 #define KVM_REG_ARM_VGIC_SYSREG_OP2_SHIFT 0 59 60 #define KVM_DEV_ARM_VGIC_SYSREG_MASK (KVM_REG_ARM_VGIC_SYSREG_OP0_MASK | \ 61 KVM_REG_ARM_VGIC_SYSREG_OP1_MASK | \ 62 KVM_REG_ARM_VGIC_SYSREG_CRN_MASK | \ 63 KVM_REG_ARM_VGIC_SYSREG_CRM_MASK | \ 64 KVM_REG_ARM_VGIC_SYSREG_OP2_MASK) 65 66 /* 67 * As per Documentation/virt/kvm/devices/arm-vgic-its.rst, 68 * below macros are defined for ITS table entry encoding. 69 */ 70 #define KVM_ITS_CTE_VALID_SHIFT 63 71 #define KVM_ITS_CTE_VALID_MASK BIT_ULL(63) 72 #define KVM_ITS_CTE_RDBASE_SHIFT 16 73 #define KVM_ITS_CTE_ICID_MASK GENMASK_ULL(15, 0) 74 #define KVM_ITS_ITE_NEXT_SHIFT 48 75 #define KVM_ITS_ITE_PINTID_SHIFT 16 76 #define KVM_ITS_ITE_PINTID_MASK GENMASK_ULL(47, 16) 77 #define KVM_ITS_ITE_ICID_MASK GENMASK_ULL(15, 0) 78 #define KVM_ITS_DTE_VALID_SHIFT 63 79 #define KVM_ITS_DTE_VALID_MASK BIT_ULL(63) 80 #define KVM_ITS_DTE_NEXT_SHIFT 49 81 #define KVM_ITS_DTE_NEXT_MASK GENMASK_ULL(62, 49) 82 #define KVM_ITS_DTE_ITTADDR_SHIFT 5 83 #define KVM_ITS_DTE_ITTADDR_MASK GENMASK_ULL(48, 5) 84 #define KVM_ITS_DTE_SIZE_MASK GENMASK_ULL(4, 0) 85 #define KVM_ITS_L1E_VALID_MASK BIT_ULL(63) 86 /* we only support 64 kB translation table page size */ 87 #define KVM_ITS_L1E_ADDR_MASK GENMASK_ULL(51, 16) 88 89 #define KVM_VGIC_V3_RDIST_INDEX_MASK GENMASK_ULL(11, 0) 90 #define KVM_VGIC_V3_RDIST_FLAGS_MASK GENMASK_ULL(15, 12) 91 #define KVM_VGIC_V3_RDIST_FLAGS_SHIFT 12 92 #define KVM_VGIC_V3_RDIST_BASE_MASK GENMASK_ULL(51, 16) 93 #define KVM_VGIC_V3_RDIST_COUNT_MASK GENMASK_ULL(63, 52) 94 #define KVM_VGIC_V3_RDIST_COUNT_SHIFT 52 95 96 #ifdef CONFIG_DEBUG_SPINLOCK 97 #define DEBUG_SPINLOCK_BUG_ON(p) BUG_ON(p) 98 #else 99 #define DEBUG_SPINLOCK_BUG_ON(p) 100 #endif 101 102 static inline u32 vgic_get_implementation_rev(struct kvm_vcpu *vcpu) 103 { 104 return vcpu->kvm->arch.vgic.implementation_rev; 105 } 106 107 /* Requires the irq_lock to be held by the caller. */ 108 static inline bool irq_is_pending(struct vgic_irq *irq) 109 { 110 if (irq->config == VGIC_CONFIG_EDGE) 111 return irq->pending_latch; 112 else 113 return irq->pending_latch || irq->line_level; 114 } 115 116 static inline bool vgic_irq_is_mapped_level(struct vgic_irq *irq) 117 { 118 return irq->config == VGIC_CONFIG_LEVEL && irq->hw; 119 } 120 121 static inline int vgic_irq_get_lr_count(struct vgic_irq *irq) 122 { 123 /* Account for the active state as an interrupt */ 124 if (vgic_irq_is_sgi(irq->intid) && irq->source) 125 return hweight8(irq->source) + irq->active; 126 127 return irq_is_pending(irq) || irq->active; 128 } 129 130 static inline bool vgic_irq_is_multi_sgi(struct vgic_irq *irq) 131 { 132 return vgic_irq_get_lr_count(irq) > 1; 133 } 134 135 static inline int vgic_write_guest_lock(struct kvm *kvm, gpa_t gpa, 136 const void *data, unsigned long len) 137 { 138 struct vgic_dist *dist = &kvm->arch.vgic; 139 int ret; 140 141 dist->table_write_in_progress = true; 142 ret = kvm_write_guest_lock(kvm, gpa, data, len); 143 dist->table_write_in_progress = false; 144 145 return ret; 146 } 147 148 /* 149 * This struct provides an intermediate representation of the fields contained 150 * in the GICH_VMCR and ICH_VMCR registers, such that code exporting the GIC 151 * state to userspace can generate either GICv2 or GICv3 CPU interface 152 * registers regardless of the hardware backed GIC used. 153 */ 154 struct vgic_vmcr { 155 u32 grpen0; 156 u32 grpen1; 157 158 u32 ackctl; 159 u32 fiqen; 160 u32 cbpr; 161 u32 eoim; 162 163 u32 abpr; 164 u32 bpr; 165 u32 pmr; /* Priority mask field in the GICC_PMR and 166 * ICC_PMR_EL1 priority field format */ 167 }; 168 169 struct vgic_reg_attr { 170 struct kvm_vcpu *vcpu; 171 gpa_t addr; 172 }; 173 174 int vgic_v3_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr, 175 struct vgic_reg_attr *reg_attr); 176 int vgic_v2_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr, 177 struct vgic_reg_attr *reg_attr); 178 const struct vgic_register_region * 179 vgic_get_mmio_region(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev, 180 gpa_t addr, int len); 181 struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu, 182 u32 intid); 183 void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq); 184 bool vgic_get_phys_line_level(struct vgic_irq *irq); 185 void vgic_irq_set_phys_pending(struct vgic_irq *irq, bool pending); 186 void vgic_irq_set_phys_active(struct vgic_irq *irq, bool active); 187 bool vgic_queue_irq_unlock(struct kvm *kvm, struct vgic_irq *irq, 188 unsigned long flags); 189 void vgic_kick_vcpus(struct kvm *kvm); 190 void vgic_irq_handle_resampling(struct vgic_irq *irq, 191 bool lr_deactivated, bool lr_pending); 192 193 int vgic_check_iorange(struct kvm *kvm, phys_addr_t ioaddr, 194 phys_addr_t addr, phys_addr_t alignment, 195 phys_addr_t size); 196 197 void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu); 198 void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr); 199 void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr); 200 void vgic_v2_set_underflow(struct kvm_vcpu *vcpu); 201 int vgic_v2_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr); 202 int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write, 203 int offset, u32 *val); 204 int vgic_v2_cpuif_uaccess(struct kvm_vcpu *vcpu, bool is_write, 205 int offset, u32 *val); 206 void vgic_v2_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr); 207 void vgic_v2_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr); 208 void vgic_v2_enable(struct kvm_vcpu *vcpu); 209 int vgic_v2_probe(const struct gic_kvm_info *info); 210 int vgic_v2_map_resources(struct kvm *kvm); 211 int vgic_register_dist_iodev(struct kvm *kvm, gpa_t dist_base_address, 212 enum vgic_type); 213 214 void vgic_v2_init_lrs(void); 215 void vgic_v2_load(struct kvm_vcpu *vcpu); 216 void vgic_v2_put(struct kvm_vcpu *vcpu); 217 void vgic_v2_vmcr_sync(struct kvm_vcpu *vcpu); 218 219 void vgic_v2_save_state(struct kvm_vcpu *vcpu); 220 void vgic_v2_restore_state(struct kvm_vcpu *vcpu); 221 222 static inline bool vgic_try_get_irq_kref(struct vgic_irq *irq) 223 { 224 if (!irq) 225 return false; 226 227 if (irq->intid < VGIC_MIN_LPI) 228 return true; 229 230 return kref_get_unless_zero(&irq->refcount); 231 } 232 233 static inline void vgic_get_irq_kref(struct vgic_irq *irq) 234 { 235 WARN_ON_ONCE(!vgic_try_get_irq_kref(irq)); 236 } 237 238 void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu); 239 void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr); 240 void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr); 241 void vgic_v3_set_underflow(struct kvm_vcpu *vcpu); 242 void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr); 243 void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr); 244 void vgic_v3_enable(struct kvm_vcpu *vcpu); 245 int vgic_v3_probe(const struct gic_kvm_info *info); 246 int vgic_v3_map_resources(struct kvm *kvm); 247 int vgic_v3_lpi_sync_pending_status(struct kvm *kvm, struct vgic_irq *irq); 248 int vgic_v3_save_pending_tables(struct kvm *kvm); 249 int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count); 250 int vgic_register_redist_iodev(struct kvm_vcpu *vcpu); 251 void vgic_unregister_redist_iodev(struct kvm_vcpu *vcpu); 252 bool vgic_v3_check_base(struct kvm *kvm); 253 254 void vgic_v3_load(struct kvm_vcpu *vcpu); 255 void vgic_v3_put(struct kvm_vcpu *vcpu); 256 void vgic_v3_vmcr_sync(struct kvm_vcpu *vcpu); 257 258 bool vgic_has_its(struct kvm *kvm); 259 int kvm_vgic_register_its_device(void); 260 void vgic_enable_lpis(struct kvm_vcpu *vcpu); 261 void vgic_flush_pending_lpis(struct kvm_vcpu *vcpu); 262 int vgic_its_inject_msi(struct kvm *kvm, struct kvm_msi *msi); 263 int vgic_v3_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr); 264 int vgic_v3_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write, 265 int offset, u32 *val); 266 int vgic_v3_redist_uaccess(struct kvm_vcpu *vcpu, bool is_write, 267 int offset, u32 *val); 268 int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu, 269 struct kvm_device_attr *attr, bool is_write); 270 int vgic_v3_has_cpu_sysregs_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); 271 int vgic_v3_line_level_info_uaccess(struct kvm_vcpu *vcpu, bool is_write, 272 u32 intid, u32 *val); 273 int kvm_register_vgic_device(unsigned long type); 274 void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr); 275 void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr); 276 int vgic_lazy_init(struct kvm *kvm); 277 int vgic_init(struct kvm *kvm); 278 279 void vgic_debug_init(struct kvm *kvm); 280 void vgic_debug_destroy(struct kvm *kvm); 281 282 static inline int vgic_v3_max_apr_idx(struct kvm_vcpu *vcpu) 283 { 284 struct vgic_cpu *cpu_if = &vcpu->arch.vgic_cpu; 285 286 /* 287 * num_pri_bits are initialized with HW supported values. 288 * We can rely safely on num_pri_bits even if VM has not 289 * restored ICC_CTLR_EL1 before restoring APnR registers. 290 */ 291 switch (cpu_if->num_pri_bits) { 292 case 7: return 3; 293 case 6: return 1; 294 default: return 0; 295 } 296 } 297 298 static inline bool 299 vgic_v3_redist_region_full(struct vgic_redist_region *region) 300 { 301 if (!region->count) 302 return false; 303 304 return (region->free_index >= region->count); 305 } 306 307 struct vgic_redist_region *vgic_v3_rdist_free_slot(struct list_head *rdregs); 308 309 static inline size_t 310 vgic_v3_rd_region_size(struct kvm *kvm, struct vgic_redist_region *rdreg) 311 { 312 if (!rdreg->count) 313 return atomic_read(&kvm->online_vcpus) * KVM_VGIC_V3_REDIST_SIZE; 314 else 315 return rdreg->count * KVM_VGIC_V3_REDIST_SIZE; 316 } 317 318 struct vgic_redist_region *vgic_v3_rdist_region_from_index(struct kvm *kvm, 319 u32 index); 320 void vgic_v3_free_redist_region(struct vgic_redist_region *rdreg); 321 322 bool vgic_v3_rdist_overlap(struct kvm *kvm, gpa_t base, size_t size); 323 324 static inline bool vgic_dist_overlap(struct kvm *kvm, gpa_t base, size_t size) 325 { 326 struct vgic_dist *d = &kvm->arch.vgic; 327 328 return (base + size > d->vgic_dist_base) && 329 (base < d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE); 330 } 331 332 bool vgic_lpis_enabled(struct kvm_vcpu *vcpu); 333 int vgic_copy_lpi_list(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 **intid_ptr); 334 int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its, 335 u32 devid, u32 eventid, struct vgic_irq **irq); 336 struct vgic_its *vgic_msi_to_its(struct kvm *kvm, struct kvm_msi *msi); 337 int vgic_its_inject_cached_translation(struct kvm *kvm, struct kvm_msi *msi); 338 void vgic_lpi_translation_cache_init(struct kvm *kvm); 339 void vgic_lpi_translation_cache_destroy(struct kvm *kvm); 340 void vgic_its_invalidate_cache(struct kvm *kvm); 341 342 /* GICv4.1 MMIO interface */ 343 int vgic_its_inv_lpi(struct kvm *kvm, struct vgic_irq *irq); 344 int vgic_its_invall(struct kvm_vcpu *vcpu); 345 346 bool vgic_supports_direct_msis(struct kvm *kvm); 347 int vgic_v4_init(struct kvm *kvm); 348 void vgic_v4_teardown(struct kvm *kvm); 349 void vgic_v4_configure_vsgis(struct kvm *kvm); 350 void vgic_v4_get_vlpi_state(struct vgic_irq *irq, bool *val); 351 int vgic_v4_request_vpe_irq(struct kvm_vcpu *vcpu, int irq); 352 353 #endif 354