| 1 | /* |
| 2 | * Copyright 2008 IBM Corporation |
| 3 | * 2008 Red Hat, Inc. |
| 4 | * Copyright 2011 Intel Corporation |
| 5 | * Copyright 2016 Veertu, Inc. |
| 6 | * Copyright 2017 The Android Open Source Project |
| 7 | * |
| 8 | * QEMU Hypervisor.framework support |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of version 2 of the GNU General Public |
| 12 | * License as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 21 | * |
| 22 | * This file contain code under public domain from the hvdos project: |
| 23 | * https://github.com/mist64/hvdos |
| 24 | * |
| 25 | * Parts Copyright (c) 2011 NetApp, Inc. |
| 26 | * All rights reserved. |
| 27 | * |
| 28 | * Redistribution and use in source and binary forms, with or without |
| 29 | * modification, are permitted provided that the following conditions |
| 30 | * are met: |
| 31 | * 1. Redistributions of source code must retain the above copyright |
| 32 | * notice, this list of conditions and the following disclaimer. |
| 33 | * 2. Redistributions in binary form must reproduce the above copyright |
| 34 | * notice, this list of conditions and the following disclaimer in the |
| 35 | * documentation and/or other materials provided with the distribution. |
| 36 | * |
| 37 | * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND |
| 38 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 39 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 40 | * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE |
| 41 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 42 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 43 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 44 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 45 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 46 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 47 | * SUCH DAMAGE. |
| 48 | */ |
| 49 | |
| 50 | #include "qemu/osdep.h" |
| 51 | #include "qemu/guest-random.h" |
| 52 | #include "qemu/main-loop.h" |
| 53 | #include "qemu/queue.h" |
| 54 | #include "gdbstub/enums.h" |
| 55 | #include "exec/cpu-common.h" |
| 56 | #include "hw/core/cpu.h" |
| 57 | #include "accel/accel-cpu-ops.h" |
| 58 | #include "system/cpus.h" |
| 59 | #include "system/hvf.h" |
| 60 | #include "system/hvf_int.h" |
| 61 | #include <mach/mach_time.h> |
| 62 | |
| 63 | HVFState *hvf_state; |
| 64 | |
| 65 | static void do_hvf_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) |
| 66 | { |
| 67 | if (!cpu->vcpu_dirty) { |
| 68 | hvf_arch_get_registers(cpu); |
| 69 | cpu->vcpu_dirty = true; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | static void hvf_cpu_synchronize_state(CPUState *cpu) |
| 74 | { |
| 75 | if (!cpu->vcpu_dirty) { |
| 76 | run_on_cpu(cpu, do_hvf_cpu_synchronize_state, RUN_ON_CPU_NULL); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | static void do_hvf_cpu_synchronize_set_dirty(CPUState *cpu, |
| 81 | run_on_cpu_data arg) |
| 82 | { |
| 83 | /* QEMU state is the reference, push it to HVF now and on next entry */ |
| 84 | cpu->vcpu_dirty = true; |
| 85 | } |
| 86 | |
| 87 | static void hvf_cpu_synchronize_post_reset(CPUState *cpu) |
| 88 | { |
| 89 | run_on_cpu(cpu, do_hvf_cpu_synchronize_set_dirty, RUN_ON_CPU_NULL); |
| 90 | } |
| 91 | |
| 92 | static void hvf_cpu_synchronize_post_init(CPUState *cpu) |
| 93 | { |
| 94 | run_on_cpu(cpu, do_hvf_cpu_synchronize_set_dirty, RUN_ON_CPU_NULL); |
| 95 | } |
| 96 | |
| 97 | static void hvf_cpu_synchronize_pre_loadvm(CPUState *cpu) |
| 98 | { |
| 99 | run_on_cpu(cpu, do_hvf_cpu_synchronize_set_dirty, RUN_ON_CPU_NULL); |
| 100 | } |
| 101 | |
| 102 | static void dummy_signal(int sig) |
| 103 | { |
| 104 | } |
| 105 | |
| 106 | static void do_hvf_get_vcpu_exec_time(CPUState *cpu, run_on_cpu_data arg) |
| 107 | { |
| 108 | int r = hv_vcpu_get_exec_time(cpu->accel->fd, arg.host_ptr); |
| 109 | assert_hvf_ok(r); |
| 110 | } |
| 111 | |
| 112 | static void hvf_vcpu_destroy(CPUState *cpu) |
| 113 | { |
| 114 | hv_return_t ret = hv_vcpu_destroy(cpu->accel->fd); |
| 115 | assert_hvf_ok(ret); |
| 116 | |
| 117 | hvf_arch_vcpu_destroy(cpu); |
| 118 | g_free(cpu->accel); |
| 119 | cpu->accel = NULL; |
| 120 | } |
| 121 | |
| 122 | static int hvf_init_vcpu(CPUState *cpu) |
| 123 | { |
| 124 | int r; |
| 125 | |
| 126 | cpu->accel = g_new0(AccelCPUState, 1); |
| 127 | |
| 128 | /* init cpu signals */ |
| 129 | struct sigaction sigact; |
| 130 | |
| 131 | memset(&sigact, 0, sizeof(sigact)); |
| 132 | sigact.sa_handler = dummy_signal; |
| 133 | sigaction(SIG_IPI, &sigact, NULL); |
| 134 | |
| 135 | #ifdef __aarch64__ |
| 136 | cpu->accel->guest_debug_enabled = false; |
| 137 | |
| 138 | r = hv_vcpu_create(&cpu->accel->fd, |
| 139 | (hv_vcpu_exit_t **)&cpu->accel->exit, NULL); |
| 140 | #else |
| 141 | r = hv_vcpu_create(&cpu->accel->fd, HV_VCPU_DEFAULT); |
| 142 | #endif |
| 143 | assert_hvf_ok(r); |
| 144 | cpu->vcpu_dirty = true; |
| 145 | |
| 146 | return hvf_arch_init_vcpu(cpu); |
| 147 | } |
| 148 | |
| 149 | /* |
| 150 | * The HVF-specific vCPU thread function. This one should only run when the host |
| 151 | * CPU supports the VMX "unrestricted guest" feature. |
| 152 | */ |
| 153 | static void *hvf_cpu_thread_fn(void *arg) |
| 154 | { |
| 155 | CPUState *cpu = arg; |
| 156 | |
| 157 | int r; |
| 158 | |
| 159 | assert(hvf_enabled()); |
| 160 | |
| 161 | rcu_register_thread(); |
| 162 | |
| 163 | bql_lock(); |
| 164 | qemu_thread_get_self(cpu->thread); |
| 165 | |
| 166 | cpu->thread_id = qemu_get_thread_id(); |
| 167 | current_cpu = cpu; |
| 168 | |
| 169 | hvf_init_vcpu(cpu); |
| 170 | |
| 171 | /* signal CPU creation */ |
| 172 | cpu_thread_signal_created(cpu); |
| 173 | qemu_guest_random_seed_thread_part2(cpu->random_seed); |
| 174 | |
| 175 | do { |
| 176 | qemu_process_cpu_events(cpu); |
| 177 | if (cpu_can_run(cpu)) { |
| 178 | r = hvf_arch_vcpu_exec(cpu); |
| 179 | if (r == EXCP_DEBUG) { |
| 180 | cpu_handle_guest_debug(cpu); |
| 181 | } |
| 182 | } |
| 183 | } while (!cpu->unplug || cpu_can_run(cpu)); |
| 184 | |
| 185 | hvf_vcpu_destroy(cpu); |
| 186 | cpu_thread_signal_destroyed(cpu); |
| 187 | bql_unlock(); |
| 188 | rcu_unregister_thread(); |
| 189 | return NULL; |
| 190 | } |
| 191 | |
| 192 | static void hvf_start_vcpu_thread(CPUState *cpu) |
| 193 | { |
| 194 | char thread_name[VCPU_THREAD_NAME_SIZE]; |
| 195 | |
| 196 | /* |
| 197 | * HVF currently does not support TCG, and only runs in |
| 198 | * unrestricted-guest mode. |
| 199 | */ |
| 200 | assert(hvf_enabled()); |
| 201 | |
| 202 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/HVF", |
| 203 | cpu->cpu_index); |
| 204 | qemu_thread_create(cpu->thread, thread_name, hvf_cpu_thread_fn, |
| 205 | cpu, QEMU_THREAD_JOINABLE); |
| 206 | } |
| 207 | |
| 208 | struct hvf_sw_breakpoint *hvf_find_sw_breakpoint(CPUState *cpu, vaddr pc) |
| 209 | { |
| 210 | struct hvf_sw_breakpoint *bp; |
| 211 | |
| 212 | QTAILQ_FOREACH(bp, &hvf_state->hvf_sw_breakpoints, entry) { |
| 213 | if (bp->pc == pc) { |
| 214 | return bp; |
| 215 | } |
| 216 | } |
| 217 | return NULL; |
| 218 | } |
| 219 | |
| 220 | int hvf_sw_breakpoints_active(CPUState *cpu) |
| 221 | { |
| 222 | return !QTAILQ_EMPTY(&hvf_state->hvf_sw_breakpoints); |
| 223 | } |
| 224 | |
| 225 | static void do_hvf_update_guest_debug(CPUState *cpu, run_on_cpu_data arg) |
| 226 | { |
| 227 | hvf_arch_update_guest_debug(cpu); |
| 228 | } |
| 229 | |
| 230 | int hvf_update_guest_debug(CPUState *cpu) |
| 231 | { |
| 232 | run_on_cpu(cpu, do_hvf_update_guest_debug, RUN_ON_CPU_NULL); |
| 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | static int hvf_insert_gdbstub_breakpoint(CPUState *cpu, GdbBreakpointType type, |
| 237 | vaddr addr, vaddr len) |
| 238 | { |
| 239 | struct hvf_sw_breakpoint *bp; |
| 240 | int err; |
| 241 | |
| 242 | if (type == GDB_BREAKPOINT_SW) { |
| 243 | bp = hvf_find_sw_breakpoint(cpu, addr); |
| 244 | if (bp) { |
| 245 | bp->use_count++; |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | bp = g_new(struct hvf_sw_breakpoint, 1); |
| 250 | bp->pc = addr; |
| 251 | bp->use_count = 1; |
| 252 | err = hvf_arch_insert_sw_breakpoint(cpu, bp); |
| 253 | if (err) { |
| 254 | g_free(bp); |
| 255 | return err; |
| 256 | } |
| 257 | |
| 258 | QTAILQ_INSERT_HEAD(&hvf_state->hvf_sw_breakpoints, bp, entry); |
| 259 | } else { |
| 260 | err = hvf_arch_insert_gdbstub_hw_breakpoint(addr, len, type); |
| 261 | if (err) { |
| 262 | return err; |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | CPU_FOREACH(cpu) { |
| 267 | err = hvf_update_guest_debug(cpu); |
| 268 | if (err) { |
| 269 | return err; |
| 270 | } |
| 271 | } |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | static int hvf_remove_gdbstub_breakpoint(CPUState *cpu, GdbBreakpointType type, |
| 276 | vaddr addr, vaddr len) |
| 277 | { |
| 278 | struct hvf_sw_breakpoint *bp; |
| 279 | int err; |
| 280 | |
| 281 | if (type == GDB_BREAKPOINT_SW) { |
| 282 | bp = hvf_find_sw_breakpoint(cpu, addr); |
| 283 | if (!bp) { |
| 284 | return -ENOENT; |
| 285 | } |
| 286 | |
| 287 | if (bp->use_count > 1) { |
| 288 | bp->use_count--; |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | err = hvf_arch_remove_sw_breakpoint(cpu, bp); |
| 293 | if (err) { |
| 294 | return err; |
| 295 | } |
| 296 | |
| 297 | QTAILQ_REMOVE(&hvf_state->hvf_sw_breakpoints, bp, entry); |
| 298 | g_free(bp); |
| 299 | } else { |
| 300 | err = hvf_arch_remove_gdbstub_hw_breakpoint(addr, len, type); |
| 301 | if (err) { |
| 302 | return err; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | CPU_FOREACH(cpu) { |
| 307 | err = hvf_update_guest_debug(cpu); |
| 308 | if (err) { |
| 309 | return err; |
| 310 | } |
| 311 | } |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | static void hvf_remove_all_gdbstub_breakpoints(CPUState *cpu) |
| 316 | { |
| 317 | struct hvf_sw_breakpoint *bp, *next; |
| 318 | CPUState *tmpcpu; |
| 319 | |
| 320 | QTAILQ_FOREACH_SAFE(bp, &hvf_state->hvf_sw_breakpoints, entry, next) { |
| 321 | if (hvf_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
| 322 | /* Try harder to find a CPU that currently sees the breakpoint. */ |
| 323 | CPU_FOREACH(tmpcpu) |
| 324 | { |
| 325 | if (hvf_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { |
| 326 | break; |
| 327 | } |
| 328 | } |
| 329 | } |
| 330 | QTAILQ_REMOVE(&hvf_state->hvf_sw_breakpoints, bp, entry); |
| 331 | g_free(bp); |
| 332 | } |
| 333 | hvf_arch_remove_all_gdbstub_hw_breakpoints(); |
| 334 | |
| 335 | CPU_FOREACH(cpu) { |
| 336 | hvf_update_guest_debug(cpu); |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | static void hvf_get_vcpu_stats(CPUState *cpu, GString *buf) |
| 341 | { |
| 342 | uint64_t time_mach; /* units of mach_absolute_time() */ |
| 343 | |
| 344 | run_on_cpu(cpu, do_hvf_get_vcpu_exec_time, RUN_ON_CPU_HOST_PTR(&time_mach)); |
| 345 | |
| 346 | mach_timebase_info_data_t timebase; |
| 347 | mach_timebase_info(&timebase); |
| 348 | uint64_t time_ns = time_mach * timebase.numer / timebase.denom; |
| 349 | |
| 350 | g_string_append_printf(buf, "HVF cumulative execution time: %llu.%.3llus\n", |
| 351 | time_ns / 1000000000, |
| 352 | (time_ns % 1000000000) / 1000000); |
| 353 | } |
| 354 | |
| 355 | static void hvf_accel_ops_class_init(ObjectClass *oc, const void *data) |
| 356 | { |
| 357 | AccelOpsClass *ops = ACCEL_OPS_CLASS(oc); |
| 358 | |
| 359 | ops->cpu_target_realize = hvf_arch_cpu_realize; |
| 360 | |
| 361 | ops->create_vcpu_thread = hvf_start_vcpu_thread; |
| 362 | ops->kick_vcpu_thread = hvf_kick_vcpu_thread; |
| 363 | ops->handle_interrupt = generic_handle_interrupt; |
| 364 | |
| 365 | ops->synchronize_post_reset = hvf_cpu_synchronize_post_reset; |
| 366 | ops->synchronize_post_init = hvf_cpu_synchronize_post_init; |
| 367 | ops->synchronize_state = hvf_cpu_synchronize_state; |
| 368 | ops->synchronize_pre_loadvm = hvf_cpu_synchronize_pre_loadvm; |
| 369 | |
| 370 | ops->insert_gdbstub_breakpoint = hvf_insert_gdbstub_breakpoint; |
| 371 | ops->remove_gdbstub_breakpoint = hvf_remove_gdbstub_breakpoint; |
| 372 | ops->remove_all_gdbstub_breakpoints = hvf_remove_all_gdbstub_breakpoints; |
| 373 | ops->update_guest_debug = hvf_update_guest_debug; |
| 374 | |
| 375 | ops->get_vcpu_stats = hvf_get_vcpu_stats; |
| 376 | }; |
| 377 | |
| 378 | static const TypeInfo hvf_accel_ops_type = { |
| 379 | .name = ACCEL_OPS_NAME("hvf"), |
| 380 | |
| 381 | .parent = TYPE_ACCEL_OPS, |
| 382 | .class_init = hvf_accel_ops_class_init, |
| 383 | .abstract = true, |
| 384 | }; |
| 385 | |
| 386 | static void hvf_accel_ops_register_types(void) |
| 387 | { |
| 388 | type_register_static(&hvf_accel_ops_type); |
| 389 | } |
| 390 | |
| 391 | type_init(hvf_accel_ops_register_types); |