1 /* 2 * ARM Generic Interrupt Controller using KVM in-kernel support 3 * 4 * Copyright (c) 2015 Samsung Electronics Co., Ltd. 5 * Written by Pavel Fedin 6 * Based on vGICv2 code by Peter Maydell 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation, either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License along 19 * with this program; if not, see <http://www.gnu.org/licenses/>. 20 */ 21 22 #include "qemu/osdep.h" 23 #include "qapi/error.h" 24 #include "hw/intc/arm_gicv3_common.h" 25 #include "hw/sysbus.h" 26 #include "qemu/error-report.h" 27 #include "sysemu/kvm.h" 28 #include "sysemu/sysemu.h" 29 #include "kvm_arm.h" 30 #include "gicv3_internal.h" 31 #include "vgic_common.h" 32 #include "migration/blocker.h" 33 34 #ifdef DEBUG_GICV3_KVM 35 #define DPRINTF(fmt, ...) \ 36 do { fprintf(stderr, "kvm_gicv3: " fmt, ## __VA_ARGS__); } while (0) 37 #else 38 #define DPRINTF(fmt, ...) \ 39 do { } while (0) 40 #endif 41 42 #define TYPE_KVM_ARM_GICV3 "kvm-arm-gicv3" 43 #define KVM_ARM_GICV3(obj) \ 44 OBJECT_CHECK(GICv3State, (obj), TYPE_KVM_ARM_GICV3) 45 #define KVM_ARM_GICV3_CLASS(klass) \ 46 OBJECT_CLASS_CHECK(KVMARMGICv3Class, (klass), TYPE_KVM_ARM_GICV3) 47 #define KVM_ARM_GICV3_GET_CLASS(obj) \ 48 OBJECT_GET_CLASS(KVMARMGICv3Class, (obj), TYPE_KVM_ARM_GICV3) 49 50 #define KVM_DEV_ARM_VGIC_SYSREG(op0, op1, crn, crm, op2) \ 51 (ARM64_SYS_REG_SHIFT_MASK(op0, OP0) | \ 52 ARM64_SYS_REG_SHIFT_MASK(op1, OP1) | \ 53 ARM64_SYS_REG_SHIFT_MASK(crn, CRN) | \ 54 ARM64_SYS_REG_SHIFT_MASK(crm, CRM) | \ 55 ARM64_SYS_REG_SHIFT_MASK(op2, OP2)) 56 57 #define ICC_PMR_EL1 \ 58 KVM_DEV_ARM_VGIC_SYSREG(3, 0, 4, 6, 0) 59 #define ICC_BPR0_EL1 \ 60 KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 8, 3) 61 #define ICC_AP0R_EL1(n) \ 62 KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 8, 4 | n) 63 #define ICC_AP1R_EL1(n) \ 64 KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 9, n) 65 #define ICC_BPR1_EL1 \ 66 KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 12, 3) 67 #define ICC_CTLR_EL1 \ 68 KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 12, 4) 69 #define ICC_SRE_EL1 \ 70 KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 12, 5) 71 #define ICC_IGRPEN0_EL1 \ 72 KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 12, 6) 73 #define ICC_IGRPEN1_EL1 \ 74 KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 12, 7) 75 76 typedef struct KVMARMGICv3Class { 77 ARMGICv3CommonClass parent_class; 78 DeviceRealize parent_realize; 79 void (*parent_reset)(DeviceState *dev); 80 } KVMARMGICv3Class; 81 82 static void kvm_arm_gicv3_set_irq(void *opaque, int irq, int level) 83 { 84 GICv3State *s = (GICv3State *)opaque; 85 86 kvm_arm_gic_set_irq(s->num_irq, irq, level); 87 } 88 89 #define KVM_VGIC_ATTR(reg, typer) \ 90 ((typer & KVM_DEV_ARM_VGIC_V3_MPIDR_MASK) | (reg)) 91 92 static inline void kvm_gicd_access(GICv3State *s, int offset, 93 uint32_t *val, bool write) 94 { 95 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_DIST_REGS, 96 KVM_VGIC_ATTR(offset, 0), 97 val, write, &error_abort); 98 } 99 100 static inline void kvm_gicr_access(GICv3State *s, int offset, int cpu, 101 uint32_t *val, bool write) 102 { 103 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_REDIST_REGS, 104 KVM_VGIC_ATTR(offset, s->cpu[cpu].gicr_typer), 105 val, write, &error_abort); 106 } 107 108 static inline void kvm_gicc_access(GICv3State *s, uint64_t reg, int cpu, 109 uint64_t *val, bool write) 110 { 111 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS, 112 KVM_VGIC_ATTR(reg, s->cpu[cpu].gicr_typer), 113 val, write, &error_abort); 114 } 115 116 static inline void kvm_gic_line_level_access(GICv3State *s, int irq, int cpu, 117 uint32_t *val, bool write) 118 { 119 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO, 120 KVM_VGIC_ATTR(irq, s->cpu[cpu].gicr_typer) | 121 (VGIC_LEVEL_INFO_LINE_LEVEL << 122 KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_SHIFT), 123 val, write, &error_abort); 124 } 125 126 /* Loop through each distributor IRQ related register; since bits 127 * corresponding to SPIs and PPIs are RAZ/WI when affinity routing 128 * is enabled, we skip those. 129 */ 130 #define for_each_dist_irq_reg(_irq, _max, _field_width) \ 131 for (_irq = GIC_INTERNAL; _irq < _max; _irq += (32 / _field_width)) 132 133 static void kvm_dist_get_priority(GICv3State *s, uint32_t offset, uint8_t *bmp) 134 { 135 uint32_t reg, *field; 136 int irq; 137 138 field = (uint32_t *)bmp; 139 for_each_dist_irq_reg(irq, s->num_irq, 8) { 140 kvm_gicd_access(s, offset, ®, false); 141 *field = reg; 142 offset += 4; 143 field++; 144 } 145 } 146 147 static void kvm_dist_put_priority(GICv3State *s, uint32_t offset, uint8_t *bmp) 148 { 149 uint32_t reg, *field; 150 int irq; 151 152 field = (uint32_t *)bmp; 153 for_each_dist_irq_reg(irq, s->num_irq, 8) { 154 reg = *field; 155 kvm_gicd_access(s, offset, ®, true); 156 offset += 4; 157 field++; 158 } 159 } 160 161 static void kvm_dist_get_edge_trigger(GICv3State *s, uint32_t offset, 162 uint32_t *bmp) 163 { 164 uint32_t reg; 165 int irq; 166 167 for_each_dist_irq_reg(irq, s->num_irq, 2) { 168 kvm_gicd_access(s, offset, ®, false); 169 reg = half_unshuffle32(reg >> 1); 170 if (irq % 32 != 0) { 171 reg = (reg << 16); 172 } 173 *gic_bmp_ptr32(bmp, irq) |= reg; 174 offset += 4; 175 } 176 } 177 178 static void kvm_dist_put_edge_trigger(GICv3State *s, uint32_t offset, 179 uint32_t *bmp) 180 { 181 uint32_t reg; 182 int irq; 183 184 for_each_dist_irq_reg(irq, s->num_irq, 2) { 185 reg = *gic_bmp_ptr32(bmp, irq); 186 if (irq % 32 != 0) { 187 reg = (reg & 0xffff0000) >> 16; 188 } else { 189 reg = reg & 0xffff; 190 } 191 reg = half_shuffle32(reg) << 1; 192 kvm_gicd_access(s, offset, ®, true); 193 offset += 4; 194 } 195 } 196 197 static void kvm_gic_get_line_level_bmp(GICv3State *s, uint32_t *bmp) 198 { 199 uint32_t reg; 200 int irq; 201 202 for_each_dist_irq_reg(irq, s->num_irq, 1) { 203 kvm_gic_line_level_access(s, irq, 0, ®, false); 204 *gic_bmp_ptr32(bmp, irq) = reg; 205 } 206 } 207 208 static void kvm_gic_put_line_level_bmp(GICv3State *s, uint32_t *bmp) 209 { 210 uint32_t reg; 211 int irq; 212 213 for_each_dist_irq_reg(irq, s->num_irq, 1) { 214 reg = *gic_bmp_ptr32(bmp, irq); 215 kvm_gic_line_level_access(s, irq, 0, ®, true); 216 } 217 } 218 219 /* Read a bitmap register group from the kernel VGIC. */ 220 static void kvm_dist_getbmp(GICv3State *s, uint32_t offset, uint32_t *bmp) 221 { 222 uint32_t reg; 223 int irq; 224 225 for_each_dist_irq_reg(irq, s->num_irq, 1) { 226 kvm_gicd_access(s, offset, ®, false); 227 *gic_bmp_ptr32(bmp, irq) = reg; 228 offset += 4; 229 } 230 } 231 232 static void kvm_dist_putbmp(GICv3State *s, uint32_t offset, 233 uint32_t clroffset, uint32_t *bmp) 234 { 235 uint32_t reg; 236 int irq; 237 238 for_each_dist_irq_reg(irq, s->num_irq, 1) { 239 /* If this bitmap is a set/clear register pair, first write to the 240 * clear-reg to clear all bits before using the set-reg to write 241 * the 1 bits. 242 */ 243 if (clroffset != 0) { 244 reg = 0; 245 kvm_gicd_access(s, clroffset, ®, true); 246 } 247 reg = *gic_bmp_ptr32(bmp, irq); 248 kvm_gicd_access(s, offset, ®, true); 249 offset += 4; 250 } 251 } 252 253 static void kvm_arm_gicv3_check(GICv3State *s) 254 { 255 uint32_t reg; 256 uint32_t num_irq; 257 258 /* Sanity checking s->num_irq */ 259 kvm_gicd_access(s, GICD_TYPER, ®, false); 260 num_irq = ((reg & 0x1f) + 1) * 32; 261 262 if (num_irq < s->num_irq) { 263 error_report("Model requests %u IRQs, but kernel supports max %u", 264 s->num_irq, num_irq); 265 abort(); 266 } 267 } 268 269 static void kvm_arm_gicv3_put(GICv3State *s) 270 { 271 uint32_t regl, regh, reg; 272 uint64_t reg64, redist_typer; 273 int ncpu, i; 274 275 kvm_arm_gicv3_check(s); 276 277 kvm_gicr_access(s, GICR_TYPER, 0, ®l, false); 278 kvm_gicr_access(s, GICR_TYPER + 4, 0, ®h, false); 279 redist_typer = ((uint64_t)regh << 32) | regl; 280 281 reg = s->gicd_ctlr; 282 kvm_gicd_access(s, GICD_CTLR, ®, true); 283 284 if (redist_typer & GICR_TYPER_PLPIS) { 285 /* Set base addresses before LPIs are enabled by GICR_CTLR write */ 286 for (ncpu = 0; ncpu < s->num_cpu; ncpu++) { 287 GICv3CPUState *c = &s->cpu[ncpu]; 288 289 reg64 = c->gicr_propbaser; 290 regl = (uint32_t)reg64; 291 kvm_gicr_access(s, GICR_PROPBASER, ncpu, ®l, true); 292 regh = (uint32_t)(reg64 >> 32); 293 kvm_gicr_access(s, GICR_PROPBASER + 4, ncpu, ®h, true); 294 295 reg64 = c->gicr_pendbaser; 296 if (!c->gicr_ctlr & GICR_CTLR_ENABLE_LPIS) { 297 /* Setting PTZ is advised if LPIs are disabled, to reduce 298 * GIC initialization time. 299 */ 300 reg64 |= GICR_PENDBASER_PTZ; 301 } 302 regl = (uint32_t)reg64; 303 kvm_gicr_access(s, GICR_PENDBASER, ncpu, ®l, true); 304 regh = (uint32_t)(reg64 >> 32); 305 kvm_gicr_access(s, GICR_PENDBASER + 4, ncpu, ®h, true); 306 } 307 } 308 309 /* Redistributor state (one per CPU) */ 310 311 for (ncpu = 0; ncpu < s->num_cpu; ncpu++) { 312 GICv3CPUState *c = &s->cpu[ncpu]; 313 314 reg = c->gicr_ctlr; 315 kvm_gicr_access(s, GICR_CTLR, ncpu, ®, true); 316 317 reg = c->gicr_statusr[GICV3_NS]; 318 kvm_gicr_access(s, GICR_STATUSR, ncpu, ®, true); 319 320 reg = c->gicr_waker; 321 kvm_gicr_access(s, GICR_WAKER, ncpu, ®, true); 322 323 reg = c->gicr_igroupr0; 324 kvm_gicr_access(s, GICR_IGROUPR0, ncpu, ®, true); 325 326 reg = ~0; 327 kvm_gicr_access(s, GICR_ICENABLER0, ncpu, ®, true); 328 reg = c->gicr_ienabler0; 329 kvm_gicr_access(s, GICR_ISENABLER0, ncpu, ®, true); 330 331 /* Restore config before pending so we treat level/edge correctly */ 332 reg = half_shuffle32(c->edge_trigger >> 16) << 1; 333 kvm_gicr_access(s, GICR_ICFGR1, ncpu, ®, true); 334 335 reg = c->level; 336 kvm_gic_line_level_access(s, 0, ncpu, ®, true); 337 338 reg = ~0; 339 kvm_gicr_access(s, GICR_ICPENDR0, ncpu, ®, true); 340 reg = c->gicr_ipendr0; 341 kvm_gicr_access(s, GICR_ISPENDR0, ncpu, ®, true); 342 343 reg = ~0; 344 kvm_gicr_access(s, GICR_ICACTIVER0, ncpu, ®, true); 345 reg = c->gicr_iactiver0; 346 kvm_gicr_access(s, GICR_ISACTIVER0, ncpu, ®, true); 347 348 for (i = 0; i < GIC_INTERNAL; i += 4) { 349 reg = c->gicr_ipriorityr[i] | 350 (c->gicr_ipriorityr[i + 1] << 8) | 351 (c->gicr_ipriorityr[i + 2] << 16) | 352 (c->gicr_ipriorityr[i + 3] << 24); 353 kvm_gicr_access(s, GICR_IPRIORITYR + i, ncpu, ®, true); 354 } 355 } 356 357 /* Distributor state (shared between all CPUs */ 358 reg = s->gicd_statusr[GICV3_NS]; 359 kvm_gicd_access(s, GICD_STATUSR, ®, true); 360 361 /* s->enable bitmap -> GICD_ISENABLERn */ 362 kvm_dist_putbmp(s, GICD_ISENABLER, GICD_ICENABLER, s->enabled); 363 364 /* s->group bitmap -> GICD_IGROUPRn */ 365 kvm_dist_putbmp(s, GICD_IGROUPR, 0, s->group); 366 367 /* Restore targets before pending to ensure the pending state is set on 368 * the appropriate CPU interfaces in the kernel 369 */ 370 371 /* s->gicd_irouter[irq] -> GICD_IROUTERn 372 * We can't use kvm_dist_put() here because the registers are 64-bit 373 */ 374 for (i = GIC_INTERNAL; i < s->num_irq; i++) { 375 uint32_t offset; 376 377 offset = GICD_IROUTER + (sizeof(uint32_t) * i); 378 reg = (uint32_t)s->gicd_irouter[i]; 379 kvm_gicd_access(s, offset, ®, true); 380 381 offset = GICD_IROUTER + (sizeof(uint32_t) * i) + 4; 382 reg = (uint32_t)(s->gicd_irouter[i] >> 32); 383 kvm_gicd_access(s, offset, ®, true); 384 } 385 386 /* s->trigger bitmap -> GICD_ICFGRn 387 * (restore configuration registers before pending IRQs so we treat 388 * level/edge correctly) 389 */ 390 kvm_dist_put_edge_trigger(s, GICD_ICFGR, s->edge_trigger); 391 392 /* s->level bitmap -> line_level */ 393 kvm_gic_put_line_level_bmp(s, s->level); 394 395 /* s->pending bitmap -> GICD_ISPENDRn */ 396 kvm_dist_putbmp(s, GICD_ISPENDR, GICD_ICPENDR, s->pending); 397 398 /* s->active bitmap -> GICD_ISACTIVERn */ 399 kvm_dist_putbmp(s, GICD_ISACTIVER, GICD_ICACTIVER, s->active); 400 401 /* s->gicd_ipriority[] -> GICD_IPRIORITYRn */ 402 kvm_dist_put_priority(s, GICD_IPRIORITYR, s->gicd_ipriority); 403 404 /* CPU Interface state (one per CPU) */ 405 406 for (ncpu = 0; ncpu < s->num_cpu; ncpu++) { 407 GICv3CPUState *c = &s->cpu[ncpu]; 408 int num_pri_bits; 409 410 kvm_gicc_access(s, ICC_SRE_EL1, ncpu, &c->icc_sre_el1, true); 411 kvm_gicc_access(s, ICC_CTLR_EL1, ncpu, 412 &c->icc_ctlr_el1[GICV3_NS], true); 413 kvm_gicc_access(s, ICC_IGRPEN0_EL1, ncpu, 414 &c->icc_igrpen[GICV3_G0], true); 415 kvm_gicc_access(s, ICC_IGRPEN1_EL1, ncpu, 416 &c->icc_igrpen[GICV3_G1NS], true); 417 kvm_gicc_access(s, ICC_PMR_EL1, ncpu, &c->icc_pmr_el1, true); 418 kvm_gicc_access(s, ICC_BPR0_EL1, ncpu, &c->icc_bpr[GICV3_G0], true); 419 kvm_gicc_access(s, ICC_BPR1_EL1, ncpu, &c->icc_bpr[GICV3_G1NS], true); 420 421 num_pri_bits = ((c->icc_ctlr_el1[GICV3_NS] & 422 ICC_CTLR_EL1_PRIBITS_MASK) >> 423 ICC_CTLR_EL1_PRIBITS_SHIFT) + 1; 424 425 switch (num_pri_bits) { 426 case 7: 427 reg64 = c->icc_apr[GICV3_G0][3]; 428 kvm_gicc_access(s, ICC_AP0R_EL1(3), ncpu, ®64, true); 429 reg64 = c->icc_apr[GICV3_G0][2]; 430 kvm_gicc_access(s, ICC_AP0R_EL1(2), ncpu, ®64, true); 431 case 6: 432 reg64 = c->icc_apr[GICV3_G0][1]; 433 kvm_gicc_access(s, ICC_AP0R_EL1(1), ncpu, ®64, true); 434 default: 435 reg64 = c->icc_apr[GICV3_G0][0]; 436 kvm_gicc_access(s, ICC_AP0R_EL1(0), ncpu, ®64, true); 437 } 438 439 switch (num_pri_bits) { 440 case 7: 441 reg64 = c->icc_apr[GICV3_G1NS][3]; 442 kvm_gicc_access(s, ICC_AP1R_EL1(3), ncpu, ®64, true); 443 reg64 = c->icc_apr[GICV3_G1NS][2]; 444 kvm_gicc_access(s, ICC_AP1R_EL1(2), ncpu, ®64, true); 445 case 6: 446 reg64 = c->icc_apr[GICV3_G1NS][1]; 447 kvm_gicc_access(s, ICC_AP1R_EL1(1), ncpu, ®64, true); 448 default: 449 reg64 = c->icc_apr[GICV3_G1NS][0]; 450 kvm_gicc_access(s, ICC_AP1R_EL1(0), ncpu, ®64, true); 451 } 452 } 453 } 454 455 static void kvm_arm_gicv3_get(GICv3State *s) 456 { 457 uint32_t regl, regh, reg; 458 uint64_t reg64, redist_typer; 459 int ncpu, i; 460 461 kvm_arm_gicv3_check(s); 462 463 kvm_gicr_access(s, GICR_TYPER, 0, ®l, false); 464 kvm_gicr_access(s, GICR_TYPER + 4, 0, ®h, false); 465 redist_typer = ((uint64_t)regh << 32) | regl; 466 467 kvm_gicd_access(s, GICD_CTLR, ®, false); 468 s->gicd_ctlr = reg; 469 470 /* Redistributor state (one per CPU) */ 471 472 for (ncpu = 0; ncpu < s->num_cpu; ncpu++) { 473 GICv3CPUState *c = &s->cpu[ncpu]; 474 475 kvm_gicr_access(s, GICR_CTLR, ncpu, ®, false); 476 c->gicr_ctlr = reg; 477 478 kvm_gicr_access(s, GICR_STATUSR, ncpu, ®, false); 479 c->gicr_statusr[GICV3_NS] = reg; 480 481 kvm_gicr_access(s, GICR_WAKER, ncpu, ®, false); 482 c->gicr_waker = reg; 483 484 kvm_gicr_access(s, GICR_IGROUPR0, ncpu, ®, false); 485 c->gicr_igroupr0 = reg; 486 kvm_gicr_access(s, GICR_ISENABLER0, ncpu, ®, false); 487 c->gicr_ienabler0 = reg; 488 kvm_gicr_access(s, GICR_ICFGR1, ncpu, ®, false); 489 c->edge_trigger = half_unshuffle32(reg >> 1) << 16; 490 kvm_gic_line_level_access(s, 0, ncpu, ®, false); 491 c->level = reg; 492 kvm_gicr_access(s, GICR_ISPENDR0, ncpu, ®, false); 493 c->gicr_ipendr0 = reg; 494 kvm_gicr_access(s, GICR_ISACTIVER0, ncpu, ®, false); 495 c->gicr_iactiver0 = reg; 496 497 for (i = 0; i < GIC_INTERNAL; i += 4) { 498 kvm_gicr_access(s, GICR_IPRIORITYR + i, ncpu, ®, false); 499 c->gicr_ipriorityr[i] = extract32(reg, 0, 8); 500 c->gicr_ipriorityr[i + 1] = extract32(reg, 8, 8); 501 c->gicr_ipriorityr[i + 2] = extract32(reg, 16, 8); 502 c->gicr_ipriorityr[i + 3] = extract32(reg, 24, 8); 503 } 504 } 505 506 if (redist_typer & GICR_TYPER_PLPIS) { 507 for (ncpu = 0; ncpu < s->num_cpu; ncpu++) { 508 GICv3CPUState *c = &s->cpu[ncpu]; 509 510 kvm_gicr_access(s, GICR_PROPBASER, ncpu, ®l, false); 511 kvm_gicr_access(s, GICR_PROPBASER + 4, ncpu, ®h, false); 512 c->gicr_propbaser = ((uint64_t)regh << 32) | regl; 513 514 kvm_gicr_access(s, GICR_PENDBASER, ncpu, ®l, false); 515 kvm_gicr_access(s, GICR_PENDBASER + 4, ncpu, ®h, false); 516 c->gicr_pendbaser = ((uint64_t)regh << 32) | regl; 517 } 518 } 519 520 /* Distributor state (shared between all CPUs */ 521 522 kvm_gicd_access(s, GICD_STATUSR, ®, false); 523 s->gicd_statusr[GICV3_NS] = reg; 524 525 /* GICD_IGROUPRn -> s->group bitmap */ 526 kvm_dist_getbmp(s, GICD_IGROUPR, s->group); 527 528 /* GICD_ISENABLERn -> s->enabled bitmap */ 529 kvm_dist_getbmp(s, GICD_ISENABLER, s->enabled); 530 531 /* Line level of irq */ 532 kvm_gic_get_line_level_bmp(s, s->level); 533 /* GICD_ISPENDRn -> s->pending bitmap */ 534 kvm_dist_getbmp(s, GICD_ISPENDR, s->pending); 535 536 /* GICD_ISACTIVERn -> s->active bitmap */ 537 kvm_dist_getbmp(s, GICD_ISACTIVER, s->active); 538 539 /* GICD_ICFGRn -> s->trigger bitmap */ 540 kvm_dist_get_edge_trigger(s, GICD_ICFGR, s->edge_trigger); 541 542 /* GICD_IPRIORITYRn -> s->gicd_ipriority[] */ 543 kvm_dist_get_priority(s, GICD_IPRIORITYR, s->gicd_ipriority); 544 545 /* GICD_IROUTERn -> s->gicd_irouter[irq] */ 546 for (i = GIC_INTERNAL; i < s->num_irq; i++) { 547 uint32_t offset; 548 549 offset = GICD_IROUTER + (sizeof(uint32_t) * i); 550 kvm_gicd_access(s, offset, ®l, false); 551 offset = GICD_IROUTER + (sizeof(uint32_t) * i) + 4; 552 kvm_gicd_access(s, offset, ®h, false); 553 s->gicd_irouter[i] = ((uint64_t)regh << 32) | regl; 554 } 555 556 /***************************************************************** 557 * CPU Interface(s) State 558 */ 559 560 for (ncpu = 0; ncpu < s->num_cpu; ncpu++) { 561 GICv3CPUState *c = &s->cpu[ncpu]; 562 int num_pri_bits; 563 564 kvm_gicc_access(s, ICC_SRE_EL1, ncpu, &c->icc_sre_el1, false); 565 kvm_gicc_access(s, ICC_CTLR_EL1, ncpu, 566 &c->icc_ctlr_el1[GICV3_NS], false); 567 kvm_gicc_access(s, ICC_IGRPEN0_EL1, ncpu, 568 &c->icc_igrpen[GICV3_G0], false); 569 kvm_gicc_access(s, ICC_IGRPEN1_EL1, ncpu, 570 &c->icc_igrpen[GICV3_G1NS], false); 571 kvm_gicc_access(s, ICC_PMR_EL1, ncpu, &c->icc_pmr_el1, false); 572 kvm_gicc_access(s, ICC_BPR0_EL1, ncpu, &c->icc_bpr[GICV3_G0], false); 573 kvm_gicc_access(s, ICC_BPR1_EL1, ncpu, &c->icc_bpr[GICV3_G1NS], false); 574 num_pri_bits = ((c->icc_ctlr_el1[GICV3_NS] & 575 ICC_CTLR_EL1_PRIBITS_MASK) >> 576 ICC_CTLR_EL1_PRIBITS_SHIFT) + 1; 577 578 switch (num_pri_bits) { 579 case 7: 580 kvm_gicc_access(s, ICC_AP0R_EL1(3), ncpu, ®64, false); 581 c->icc_apr[GICV3_G0][3] = reg64; 582 kvm_gicc_access(s, ICC_AP0R_EL1(2), ncpu, ®64, false); 583 c->icc_apr[GICV3_G0][2] = reg64; 584 case 6: 585 kvm_gicc_access(s, ICC_AP0R_EL1(1), ncpu, ®64, false); 586 c->icc_apr[GICV3_G0][1] = reg64; 587 default: 588 kvm_gicc_access(s, ICC_AP0R_EL1(0), ncpu, ®64, false); 589 c->icc_apr[GICV3_G0][0] = reg64; 590 } 591 592 switch (num_pri_bits) { 593 case 7: 594 kvm_gicc_access(s, ICC_AP1R_EL1(3), ncpu, ®64, false); 595 c->icc_apr[GICV3_G1NS][3] = reg64; 596 kvm_gicc_access(s, ICC_AP1R_EL1(2), ncpu, ®64, false); 597 c->icc_apr[GICV3_G1NS][2] = reg64; 598 case 6: 599 kvm_gicc_access(s, ICC_AP1R_EL1(1), ncpu, ®64, false); 600 c->icc_apr[GICV3_G1NS][1] = reg64; 601 default: 602 kvm_gicc_access(s, ICC_AP1R_EL1(0), ncpu, ®64, false); 603 c->icc_apr[GICV3_G1NS][0] = reg64; 604 } 605 } 606 } 607 608 static void arm_gicv3_icc_reset(CPUARMState *env, const ARMCPRegInfo *ri) 609 { 610 ARMCPU *cpu; 611 GICv3State *s; 612 GICv3CPUState *c; 613 614 c = (GICv3CPUState *)env->gicv3state; 615 s = c->gic; 616 cpu = ARM_CPU(c->cpu); 617 618 c->icc_pmr_el1 = 0; 619 c->icc_bpr[GICV3_G0] = GIC_MIN_BPR; 620 c->icc_bpr[GICV3_G1] = GIC_MIN_BPR; 621 c->icc_bpr[GICV3_G1NS] = GIC_MIN_BPR; 622 623 c->icc_sre_el1 = 0x7; 624 memset(c->icc_apr, 0, sizeof(c->icc_apr)); 625 memset(c->icc_igrpen, 0, sizeof(c->icc_igrpen)); 626 627 if (s->migration_blocker) { 628 return; 629 } 630 631 /* Initialize to actual HW supported configuration */ 632 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS, 633 KVM_VGIC_ATTR(ICC_CTLR_EL1, cpu->mp_affinity), 634 &c->icc_ctlr_el1[GICV3_NS], false, &error_abort); 635 636 c->icc_ctlr_el1[GICV3_S] = c->icc_ctlr_el1[GICV3_NS]; 637 } 638 639 static void kvm_arm_gicv3_reset(DeviceState *dev) 640 { 641 GICv3State *s = ARM_GICV3_COMMON(dev); 642 KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s); 643 644 DPRINTF("Reset\n"); 645 646 kgc->parent_reset(dev); 647 648 if (s->migration_blocker) { 649 DPRINTF("Cannot put kernel gic state, no kernel interface\n"); 650 return; 651 } 652 653 kvm_arm_gicv3_put(s); 654 } 655 656 /* 657 * CPU interface registers of GIC needs to be reset on CPU reset. 658 * For the calling arm_gicv3_icc_reset() on CPU reset, we register 659 * below ARMCPRegInfo. As we reset the whole cpu interface under single 660 * register reset, we define only one register of CPU interface instead 661 * of defining all the registers. 662 */ 663 static const ARMCPRegInfo gicv3_cpuif_reginfo[] = { 664 { .name = "ICC_CTLR_EL1", .state = ARM_CP_STATE_BOTH, 665 .opc0 = 3, .opc1 = 0, .crn = 12, .crm = 12, .opc2 = 4, 666 /* 667 * If ARM_CP_NOP is used, resetfn is not called, 668 * So ARM_CP_NO_RAW is appropriate type. 669 */ 670 .type = ARM_CP_NO_RAW, 671 .access = PL1_RW, 672 .readfn = arm_cp_read_zero, 673 .writefn = arm_cp_write_ignore, 674 /* 675 * We hang the whole cpu interface reset routine off here 676 * rather than parcelling it out into one little function 677 * per register 678 */ 679 .resetfn = arm_gicv3_icc_reset, 680 }, 681 REGINFO_SENTINEL 682 }; 683 684 /** 685 * vm_change_state_handler - VM change state callback aiming at flushing 686 * RDIST pending tables into guest RAM 687 * 688 * The tables get flushed to guest RAM whenever the VM gets stopped. 689 */ 690 static void vm_change_state_handler(void *opaque, int running, 691 RunState state) 692 { 693 GICv3State *s = (GICv3State *)opaque; 694 Error *err = NULL; 695 int ret; 696 697 if (running) { 698 return; 699 } 700 701 ret = kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, 702 KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES, 703 NULL, true, &err); 704 if (err) { 705 error_report_err(err); 706 } 707 if (ret < 0 && ret != -EFAULT) { 708 abort(); 709 } 710 } 711 712 713 static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp) 714 { 715 GICv3State *s = KVM_ARM_GICV3(dev); 716 KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s); 717 Error *local_err = NULL; 718 int i; 719 720 DPRINTF("kvm_arm_gicv3_realize\n"); 721 722 kgc->parent_realize(dev, &local_err); 723 if (local_err) { 724 error_propagate(errp, local_err); 725 return; 726 } 727 728 if (s->security_extn) { 729 error_setg(errp, "the in-kernel VGICv3 does not implement the " 730 "security extensions"); 731 return; 732 } 733 734 gicv3_init_irqs_and_mmio(s, kvm_arm_gicv3_set_irq, NULL); 735 736 for (i = 0; i < s->num_cpu; i++) { 737 ARMCPU *cpu = ARM_CPU(qemu_get_cpu(i)); 738 739 define_arm_cp_regs(cpu, gicv3_cpuif_reginfo); 740 } 741 742 /* Try to create the device via the device control API */ 743 s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_V3, false); 744 if (s->dev_fd < 0) { 745 error_setg_errno(errp, -s->dev_fd, "error creating in-kernel VGIC"); 746 return; 747 } 748 749 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_NR_IRQS, 750 0, &s->num_irq, true, &error_abort); 751 752 /* Tell the kernel to complete VGIC initialization now */ 753 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, 754 KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true, &error_abort); 755 756 kvm_arm_register_device(&s->iomem_dist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR, 757 KVM_VGIC_V3_ADDR_TYPE_DIST, s->dev_fd); 758 kvm_arm_register_device(&s->iomem_redist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR, 759 KVM_VGIC_V3_ADDR_TYPE_REDIST, s->dev_fd); 760 761 if (kvm_has_gsi_routing()) { 762 /* set up irq routing */ 763 kvm_init_irq_routing(kvm_state); 764 for (i = 0; i < s->num_irq - GIC_INTERNAL; ++i) { 765 kvm_irqchip_add_irq_route(kvm_state, i, 0, i); 766 } 767 768 kvm_gsi_routing_allowed = true; 769 770 kvm_irqchip_commit_routes(kvm_state); 771 } 772 773 if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_DIST_REGS, 774 GICD_CTLR)) { 775 error_setg(&s->migration_blocker, "This operating system kernel does " 776 "not support vGICv3 migration"); 777 migrate_add_blocker(s->migration_blocker, &local_err); 778 if (local_err) { 779 error_propagate(errp, local_err); 780 error_free(s->migration_blocker); 781 return; 782 } 783 } 784 if (kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, 785 KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES)) { 786 qemu_add_vm_change_state_handler(vm_change_state_handler, s); 787 } 788 } 789 790 static void kvm_arm_gicv3_class_init(ObjectClass *klass, void *data) 791 { 792 DeviceClass *dc = DEVICE_CLASS(klass); 793 ARMGICv3CommonClass *agcc = ARM_GICV3_COMMON_CLASS(klass); 794 KVMARMGICv3Class *kgc = KVM_ARM_GICV3_CLASS(klass); 795 796 agcc->pre_save = kvm_arm_gicv3_get; 797 agcc->post_load = kvm_arm_gicv3_put; 798 kgc->parent_realize = dc->realize; 799 kgc->parent_reset = dc->reset; 800 dc->realize = kvm_arm_gicv3_realize; 801 dc->reset = kvm_arm_gicv3_reset; 802 } 803 804 static const TypeInfo kvm_arm_gicv3_info = { 805 .name = TYPE_KVM_ARM_GICV3, 806 .parent = TYPE_ARM_GICV3_COMMON, 807 .instance_size = sizeof(GICv3State), 808 .class_init = kvm_arm_gicv3_class_init, 809 .class_size = sizeof(KVMARMGICv3Class), 810 }; 811 812 static void kvm_arm_gicv3_register_types(void) 813 { 814 type_register_static(&kvm_arm_gicv3_info); 815 } 816 817 type_init(kvm_arm_gicv3_register_types) 818