hw/intc/arm_gicv3_kvm.c

   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, &reg, 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, &reg, 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, &reg, 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, &reg, 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, &reg, 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, &reg, 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, &reg, 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, &reg, true);
 246         }
 247         reg = *gic_bmp_ptr32(bmp, irq);
 248         kvm_gicd_access(s, offset, &reg, 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, &reg, 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, &regl, false);
 278     kvm_gicr_access(s, GICR_TYPER + 4, 0, &regh, false);
 279     redist_typer = ((uint64_t)regh << 32) | regl;
 280
 281     reg = s->gicd_ctlr;
 282     kvm_gicd_access(s, GICD_CTLR, &reg, 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, &regl, true);
 292             regh = (uint32_t)(reg64 >> 32);
 293             kvm_gicr_access(s, GICR_PROPBASER + 4, ncpu, &regh, 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, &regl, true);
 304             regh = (uint32_t)(reg64 >> 32);
 305             kvm_gicr_access(s, GICR_PENDBASER + 4, ncpu, &regh, 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, &reg, true);
 316
 317         reg = c->gicr_statusr[GICV3_NS];
 318         kvm_gicr_access(s, GICR_STATUSR, ncpu, &reg, true);
 319
 320         reg = c->gicr_waker;
 321         kvm_gicr_access(s, GICR_WAKER, ncpu, &reg, true);
 322
 323         reg = c->gicr_igroupr0;
 324         kvm_gicr_access(s, GICR_IGROUPR0, ncpu, &reg, true);
 325
 326         reg = ~0;
 327         kvm_gicr_access(s, GICR_ICENABLER0, ncpu, &reg, true);
 328         reg = c->gicr_ienabler0;
 329         kvm_gicr_access(s, GICR_ISENABLER0, ncpu, &reg, 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, &reg, true);
 334
 335         reg = c->level;
 336         kvm_gic_line_level_access(s, 0, ncpu, &reg, true);
 337
 338         reg = ~0;
 339         kvm_gicr_access(s, GICR_ICPENDR0, ncpu, &reg, true);
 340         reg = c->gicr_ipendr0;
 341         kvm_gicr_access(s, GICR_ISPENDR0, ncpu, &reg, true);
 342
 343         reg = ~0;
 344         kvm_gicr_access(s, GICR_ICACTIVER0, ncpu, &reg, true);
 345         reg = c->gicr_iactiver0;
 346         kvm_gicr_access(s, GICR_ISACTIVER0, ncpu, &reg, 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, &reg, 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, &reg, 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, &reg, 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, &reg, 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, &reg64, true);
 429             reg64 = c->icc_apr[GICV3_G0][2];
 430             kvm_gicc_access(s, ICC_AP0R_EL1(2), ncpu, &reg64, true);
 431         case 6:
 432             reg64 = c->icc_apr[GICV3_G0][1];
 433             kvm_gicc_access(s, ICC_AP0R_EL1(1), ncpu, &reg64, true);
 434         default:
 435             reg64 = c->icc_apr[GICV3_G0][0];
 436             kvm_gicc_access(s, ICC_AP0R_EL1(0), ncpu, &reg64, 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, &reg64, true);
 443             reg64 = c->icc_apr[GICV3_G1NS][2];
 444             kvm_gicc_access(s, ICC_AP1R_EL1(2), ncpu, &reg64, true);
 445         case 6:
 446             reg64 = c->icc_apr[GICV3_G1NS][1];
 447             kvm_gicc_access(s, ICC_AP1R_EL1(1), ncpu, &reg64, true);
 448         default:
 449             reg64 = c->icc_apr[GICV3_G1NS][0];
 450             kvm_gicc_access(s, ICC_AP1R_EL1(0), ncpu, &reg64, 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, &regl, false);
 464     kvm_gicr_access(s, GICR_TYPER + 4, 0, &regh, false);
 465     redist_typer = ((uint64_t)regh << 32) | regl;
 466
 467     kvm_gicd_access(s, GICD_CTLR, &reg, 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, &reg, false);
 476         c->gicr_ctlr = reg;
 477
 478         kvm_gicr_access(s, GICR_STATUSR, ncpu, &reg, false);
 479         c->gicr_statusr[GICV3_NS] = reg;
 480
 481         kvm_gicr_access(s, GICR_WAKER, ncpu, &reg, false);
 482         c->gicr_waker = reg;
 483
 484         kvm_gicr_access(s, GICR_IGROUPR0, ncpu, &reg, false);
 485         c->gicr_igroupr0 = reg;
 486         kvm_gicr_access(s, GICR_ISENABLER0, ncpu, &reg, false);
 487         c->gicr_ienabler0 = reg;
 488         kvm_gicr_access(s, GICR_ICFGR1, ncpu, &reg, false);
 489         c->edge_trigger = half_unshuffle32(reg >> 1) << 16;
 490         kvm_gic_line_level_access(s, 0, ncpu, &reg, false);
 491         c->level = reg;
 492         kvm_gicr_access(s, GICR_ISPENDR0, ncpu, &reg, false);
 493         c->gicr_ipendr0 = reg;
 494         kvm_gicr_access(s, GICR_ISACTIVER0, ncpu, &reg, 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, &reg, 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, &regl, false);
 511             kvm_gicr_access(s, GICR_PROPBASER + 4, ncpu, &regh, false);
 512             c->gicr_propbaser = ((uint64_t)regh << 32) | regl;
 513
 514             kvm_gicr_access(s, GICR_PENDBASER, ncpu, &regl, false);
 515             kvm_gicr_access(s, GICR_PENDBASER + 4, ncpu, &regh, 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, &reg, 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, &regl, false);
 551         offset = GICD_IROUTER + (sizeof(uint32_t) * i) + 4;
 552         kvm_gicd_access(s, offset, &regh, 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, &reg64, false);
 581             c->icc_apr[GICV3_G0][3] = reg64;
 582             kvm_gicc_access(s, ICC_AP0R_EL1(2), ncpu, &reg64, false);
 583             c->icc_apr[GICV3_G0][2] = reg64;
 584         case 6:
 585             kvm_gicc_access(s, ICC_AP0R_EL1(1), ncpu, &reg64, false);
 586             c->icc_apr[GICV3_G0][1] = reg64;
 587         default:
 588             kvm_gicc_access(s, ICC_AP0R_EL1(0), ncpu, &reg64, 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, &reg64, false);
 595             c->icc_apr[GICV3_G1NS][3] = reg64;
 596             kvm_gicc_access(s, ICC_AP1R_EL1(2), ncpu, &reg64, false);
 597             c->icc_apr[GICV3_G1NS][2] = reg64;
 598         case 6:
 599             kvm_gicc_access(s, ICC_AP1R_EL1(1), ncpu, &reg64, false);
 600             c->icc_apr[GICV3_G1NS][1] = reg64;
 601         default:
 602             kvm_gicc_access(s, ICC_AP1R_EL1(0), ncpu, &reg64, 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)