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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/* Needed early for CONFIG_BSD etc. */
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#include "config-host.h" |
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#include "monitor.h" |
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#include "sysemu.h" |
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#include "gdbstub.h" |
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#include "dma.h" |
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#include "kvm.h" |
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#include "exec-all.h" |
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#include "cpus.h" |
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#include "compatfd.h" |
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|
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#ifdef SIGRTMIN
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#define SIG_IPI (SIGRTMIN+4) |
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#else
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#define SIG_IPI SIGUSR1
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#endif
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|
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static CPUState *next_cpu;
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|
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/***********************************************************/
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void hw_error(const char *fmt, ...) |
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{ |
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va_list ap; |
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CPUState *env; |
51 |
|
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va_start(ap, fmt); |
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fprintf(stderr, "qemu: hardware error: ");
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vfprintf(stderr, fmt, ap); |
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fprintf(stderr, "\n");
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for(env = first_cpu; env != NULL; env = env->next_cpu) { |
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fprintf(stderr, "CPU #%d:\n", env->cpu_index);
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#ifdef TARGET_I386
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cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU); |
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#else
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cpu_dump_state(env, stderr, fprintf, 0);
|
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#endif
|
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} |
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va_end(ap); |
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abort(); |
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} |
67 |
|
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void cpu_synchronize_all_states(void) |
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{ |
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CPUState *cpu; |
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for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
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cpu_synchronize_state(cpu); |
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} |
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} |
76 |
|
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void cpu_synchronize_all_post_reset(void) |
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{ |
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CPUState *cpu; |
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|
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for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
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cpu_synchronize_post_reset(cpu); |
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} |
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} |
85 |
|
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void cpu_synchronize_all_post_init(void) |
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{ |
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CPUState *cpu; |
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|
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for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
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cpu_synchronize_post_init(cpu); |
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} |
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} |
94 |
|
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int cpu_is_stopped(CPUState *env)
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{ |
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return !vm_running || env->stopped;
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} |
99 |
|
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static void do_vm_stop(int reason) |
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{ |
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if (vm_running) {
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cpu_disable_ticks(); |
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vm_running = 0;
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pause_all_vcpus(); |
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vm_state_notify(0, reason);
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monitor_protocol_event(QEVENT_STOP, NULL);
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} |
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} |
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|
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static int cpu_can_run(CPUState *env) |
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{ |
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if (env->stop)
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return 0; |
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if (env->stopped || !vm_running)
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return 0; |
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return 1; |
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} |
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|
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static int cpu_has_work(CPUState *env) |
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{ |
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if (env->stop)
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return 1; |
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if (env->queued_work_first)
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return 1; |
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if (env->stopped || !vm_running)
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return 0; |
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if (!env->halted)
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return 1; |
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if (qemu_cpu_has_work(env))
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return 1; |
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return 0; |
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} |
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|
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static int any_cpu_has_work(void) |
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{ |
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CPUState *env; |
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|
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for (env = first_cpu; env != NULL; env = env->next_cpu) |
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if (cpu_has_work(env))
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return 1; |
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return 0; |
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} |
144 |
|
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static void cpu_debug_handler(CPUState *env) |
146 |
{ |
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gdb_set_stop_cpu(env); |
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debug_requested = EXCP_DEBUG; |
149 |
vm_stop(EXCP_DEBUG); |
150 |
} |
151 |
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#ifndef _WIN32
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static int io_thread_fd = -1; |
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static void qemu_event_increment(void) |
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{ |
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/* Write 8 bytes to be compatible with eventfd. */
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static const uint64_t val = 1; |
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ssize_t ret; |
160 |
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if (io_thread_fd == -1) |
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return;
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do {
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ret = write(io_thread_fd, &val, sizeof(val));
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} while (ret < 0 && errno == EINTR); |
167 |
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/* EAGAIN is fine, a read must be pending. */
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if (ret < 0 && errno != EAGAIN) { |
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fprintf(stderr, "qemu_event_increment: write() filed: %s\n",
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strerror(errno)); |
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exit (1);
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} |
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} |
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static void qemu_event_read(void *opaque) |
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{ |
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int fd = (unsigned long)opaque; |
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ssize_t len; |
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char buffer[512]; |
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/* Drain the notify pipe. For eventfd, only 8 bytes will be read. */
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do {
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len = read(fd, buffer, sizeof(buffer));
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} while ((len == -1 && errno == EINTR) || len == sizeof(buffer)); |
186 |
} |
187 |
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static int qemu_event_init(void) |
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{ |
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int err;
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int fds[2]; |
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err = qemu_eventfd(fds); |
194 |
if (err == -1) |
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return -errno;
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err = fcntl_setfl(fds[0], O_NONBLOCK);
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if (err < 0) |
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goto fail;
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err = fcntl_setfl(fds[1], O_NONBLOCK);
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if (err < 0) |
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goto fail;
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qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL, |
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(void *)(unsigned long)fds[0]); |
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io_thread_fd = fds[1];
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return 0; |
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fail:
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close(fds[0]);
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close(fds[1]);
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return err;
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} |
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#else
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HANDLE qemu_event_handle; |
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static void dummy_event_handler(void *opaque) |
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{ |
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} |
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static int qemu_event_init(void) |
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{ |
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qemu_event_handle = CreateEvent(NULL, FALSE, FALSE, NULL); |
226 |
if (!qemu_event_handle) {
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fprintf(stderr, "Failed CreateEvent: %ld\n", GetLastError());
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return -1; |
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} |
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qemu_add_wait_object(qemu_event_handle, dummy_event_handler, NULL);
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return 0; |
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} |
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static void qemu_event_increment(void) |
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{ |
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if (!SetEvent(qemu_event_handle)) {
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fprintf(stderr, "qemu_event_increment: SetEvent failed: %ld\n",
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GetLastError()); |
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exit (1);
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} |
241 |
} |
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#endif
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#ifndef CONFIG_IOTHREAD
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int qemu_init_main_loop(void) |
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{ |
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cpu_set_debug_excp_handler(cpu_debug_handler); |
248 |
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return qemu_event_init();
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} |
251 |
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void qemu_main_loop_start(void) |
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{ |
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} |
255 |
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void qemu_init_vcpu(void *_env) |
257 |
{ |
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CPUState *env = _env; |
259 |
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env->nr_cores = smp_cores; |
261 |
env->nr_threads = smp_threads; |
262 |
if (kvm_enabled())
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kvm_init_vcpu(env); |
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return;
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} |
266 |
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int qemu_cpu_self(void *env) |
268 |
{ |
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return 1; |
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} |
271 |
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void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
273 |
{ |
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func(data); |
275 |
} |
276 |
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void resume_all_vcpus(void) |
278 |
{ |
279 |
} |
280 |
|
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void pause_all_vcpus(void) |
282 |
{ |
283 |
} |
284 |
|
285 |
void qemu_cpu_kick(void *env) |
286 |
{ |
287 |
return;
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} |
289 |
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void qemu_notify_event(void) |
291 |
{ |
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CPUState *env = cpu_single_env; |
293 |
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qemu_event_increment (); |
295 |
if (env) {
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cpu_exit(env); |
297 |
} |
298 |
if (next_cpu && env != next_cpu) {
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cpu_exit(next_cpu); |
300 |
} |
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} |
302 |
|
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void qemu_mutex_lock_iothread(void) {} |
304 |
void qemu_mutex_unlock_iothread(void) {} |
305 |
|
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void vm_stop(int reason) |
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{ |
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do_vm_stop(reason); |
309 |
} |
310 |
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#else /* CONFIG_IOTHREAD */ |
312 |
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#include "qemu-thread.h" |
314 |
|
315 |
QemuMutex qemu_global_mutex; |
316 |
static QemuMutex qemu_fair_mutex;
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static QemuThread io_thread;
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319 |
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320 |
static QemuThread *tcg_cpu_thread;
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static QemuCond *tcg_halt_cond;
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static int qemu_system_ready; |
324 |
/* cpu creation */
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325 |
static QemuCond qemu_cpu_cond;
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/* system init */
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327 |
static QemuCond qemu_system_cond;
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328 |
static QemuCond qemu_pause_cond;
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static QemuCond qemu_work_cond;
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330 |
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static void tcg_init_ipi(void); |
332 |
static void kvm_init_ipi(CPUState *env); |
333 |
static sigset_t block_io_signals(void); |
334 |
|
335 |
/* If we have signalfd, we mask out the signals we want to handle and then
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* use signalfd to listen for them. We rely on whatever the current signal
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337 |
* handler is to dispatch the signals when we receive them.
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*/
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339 |
static void sigfd_handler(void *opaque) |
340 |
{ |
341 |
int fd = (unsigned long) opaque; |
342 |
struct qemu_signalfd_siginfo info;
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343 |
struct sigaction action;
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344 |
ssize_t len; |
345 |
|
346 |
while (1) { |
347 |
do {
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348 |
len = read(fd, &info, sizeof(info));
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349 |
} while (len == -1 && errno == EINTR); |
350 |
|
351 |
if (len == -1 && errno == EAGAIN) { |
352 |
break;
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353 |
} |
354 |
|
355 |
if (len != sizeof(info)) { |
356 |
printf("read from sigfd returned %zd: %m\n", len);
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357 |
return;
|
358 |
} |
359 |
|
360 |
sigaction(info.ssi_signo, NULL, &action);
|
361 |
if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
|
362 |
action.sa_sigaction(info.ssi_signo, |
363 |
(siginfo_t *)&info, NULL);
|
364 |
} else if (action.sa_handler) { |
365 |
action.sa_handler(info.ssi_signo); |
366 |
} |
367 |
} |
368 |
} |
369 |
|
370 |
static int qemu_signalfd_init(sigset_t mask) |
371 |
{ |
372 |
int sigfd;
|
373 |
|
374 |
sigfd = qemu_signalfd(&mask); |
375 |
if (sigfd == -1) { |
376 |
fprintf(stderr, "failed to create signalfd\n");
|
377 |
return -errno;
|
378 |
} |
379 |
|
380 |
fcntl_setfl(sigfd, O_NONBLOCK); |
381 |
|
382 |
qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, |
383 |
(void *)(unsigned long) sigfd); |
384 |
|
385 |
return 0; |
386 |
} |
387 |
|
388 |
int qemu_init_main_loop(void) |
389 |
{ |
390 |
int ret;
|
391 |
sigset_t blocked_signals; |
392 |
|
393 |
cpu_set_debug_excp_handler(cpu_debug_handler); |
394 |
|
395 |
blocked_signals = block_io_signals(); |
396 |
|
397 |
ret = qemu_signalfd_init(blocked_signals); |
398 |
if (ret)
|
399 |
return ret;
|
400 |
|
401 |
/* Note eventfd must be drained before signalfd handlers run */
|
402 |
ret = qemu_event_init(); |
403 |
if (ret)
|
404 |
return ret;
|
405 |
|
406 |
qemu_cond_init(&qemu_pause_cond); |
407 |
qemu_cond_init(&qemu_system_cond); |
408 |
qemu_mutex_init(&qemu_fair_mutex); |
409 |
qemu_mutex_init(&qemu_global_mutex); |
410 |
qemu_mutex_lock(&qemu_global_mutex); |
411 |
|
412 |
qemu_thread_self(&io_thread); |
413 |
|
414 |
return 0; |
415 |
} |
416 |
|
417 |
void qemu_main_loop_start(void) |
418 |
{ |
419 |
qemu_system_ready = 1;
|
420 |
qemu_cond_broadcast(&qemu_system_cond); |
421 |
} |
422 |
|
423 |
void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
424 |
{ |
425 |
struct qemu_work_item wi;
|
426 |
|
427 |
if (qemu_cpu_self(env)) {
|
428 |
func(data); |
429 |
return;
|
430 |
} |
431 |
|
432 |
wi.func = func; |
433 |
wi.data = data; |
434 |
if (!env->queued_work_first)
|
435 |
env->queued_work_first = &wi; |
436 |
else
|
437 |
env->queued_work_last->next = &wi; |
438 |
env->queued_work_last = &wi; |
439 |
wi.next = NULL;
|
440 |
wi.done = false;
|
441 |
|
442 |
qemu_cpu_kick(env); |
443 |
while (!wi.done) {
|
444 |
CPUState *self_env = cpu_single_env; |
445 |
|
446 |
qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex); |
447 |
cpu_single_env = self_env; |
448 |
} |
449 |
} |
450 |
|
451 |
static void flush_queued_work(CPUState *env) |
452 |
{ |
453 |
struct qemu_work_item *wi;
|
454 |
|
455 |
if (!env->queued_work_first)
|
456 |
return;
|
457 |
|
458 |
while ((wi = env->queued_work_first)) {
|
459 |
env->queued_work_first = wi->next; |
460 |
wi->func(wi->data); |
461 |
wi->done = true;
|
462 |
} |
463 |
env->queued_work_last = NULL;
|
464 |
qemu_cond_broadcast(&qemu_work_cond); |
465 |
} |
466 |
|
467 |
static void qemu_wait_io_event_common(CPUState *env) |
468 |
{ |
469 |
if (env->stop) {
|
470 |
env->stop = 0;
|
471 |
env->stopped = 1;
|
472 |
qemu_cond_signal(&qemu_pause_cond); |
473 |
} |
474 |
flush_queued_work(env); |
475 |
} |
476 |
|
477 |
static void qemu_tcg_wait_io_event(void) |
478 |
{ |
479 |
CPUState *env; |
480 |
|
481 |
while (!any_cpu_has_work())
|
482 |
qemu_cond_timedwait(tcg_halt_cond, &qemu_global_mutex, 1000);
|
483 |
|
484 |
qemu_mutex_unlock(&qemu_global_mutex); |
485 |
|
486 |
/*
|
487 |
* Users of qemu_global_mutex can be starved, having no chance
|
488 |
* to acquire it since this path will get to it first.
|
489 |
* So use another lock to provide fairness.
|
490 |
*/
|
491 |
qemu_mutex_lock(&qemu_fair_mutex); |
492 |
qemu_mutex_unlock(&qemu_fair_mutex); |
493 |
|
494 |
qemu_mutex_lock(&qemu_global_mutex); |
495 |
|
496 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
497 |
qemu_wait_io_event_common(env); |
498 |
} |
499 |
} |
500 |
|
501 |
static void qemu_kvm_eat_signal(CPUState *env, int timeout) |
502 |
{ |
503 |
struct timespec ts;
|
504 |
int r, e;
|
505 |
siginfo_t siginfo; |
506 |
sigset_t waitset; |
507 |
|
508 |
ts.tv_sec = timeout / 1000;
|
509 |
ts.tv_nsec = (timeout % 1000) * 1000000; |
510 |
|
511 |
sigemptyset(&waitset); |
512 |
sigaddset(&waitset, SIG_IPI); |
513 |
|
514 |
qemu_mutex_unlock(&qemu_global_mutex); |
515 |
r = sigtimedwait(&waitset, &siginfo, &ts); |
516 |
e = errno; |
517 |
qemu_mutex_lock(&qemu_global_mutex); |
518 |
|
519 |
if (r == -1 && !(e == EAGAIN || e == EINTR)) { |
520 |
fprintf(stderr, "sigtimedwait: %s\n", strerror(e));
|
521 |
exit(1);
|
522 |
} |
523 |
} |
524 |
|
525 |
static void qemu_kvm_wait_io_event(CPUState *env) |
526 |
{ |
527 |
while (!cpu_has_work(env))
|
528 |
qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
|
529 |
|
530 |
qemu_kvm_eat_signal(env, 0);
|
531 |
qemu_wait_io_event_common(env); |
532 |
} |
533 |
|
534 |
static int qemu_cpu_exec(CPUState *env); |
535 |
|
536 |
static void *kvm_cpu_thread_fn(void *arg) |
537 |
{ |
538 |
CPUState *env = arg; |
539 |
|
540 |
qemu_mutex_lock(&qemu_global_mutex); |
541 |
qemu_thread_self(env->thread); |
542 |
if (kvm_enabled())
|
543 |
kvm_init_vcpu(env); |
544 |
|
545 |
kvm_init_ipi(env); |
546 |
|
547 |
/* signal CPU creation */
|
548 |
env->created = 1;
|
549 |
qemu_cond_signal(&qemu_cpu_cond); |
550 |
|
551 |
/* and wait for machine initialization */
|
552 |
while (!qemu_system_ready)
|
553 |
qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
|
554 |
|
555 |
while (1) { |
556 |
if (cpu_can_run(env))
|
557 |
qemu_cpu_exec(env); |
558 |
qemu_kvm_wait_io_event(env); |
559 |
} |
560 |
|
561 |
return NULL; |
562 |
} |
563 |
|
564 |
static void *tcg_cpu_thread_fn(void *arg) |
565 |
{ |
566 |
CPUState *env = arg; |
567 |
|
568 |
tcg_init_ipi(); |
569 |
qemu_thread_self(env->thread); |
570 |
|
571 |
/* signal CPU creation */
|
572 |
qemu_mutex_lock(&qemu_global_mutex); |
573 |
for (env = first_cpu; env != NULL; env = env->next_cpu) |
574 |
env->created = 1;
|
575 |
qemu_cond_signal(&qemu_cpu_cond); |
576 |
|
577 |
/* and wait for machine initialization */
|
578 |
while (!qemu_system_ready)
|
579 |
qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
|
580 |
|
581 |
while (1) { |
582 |
cpu_exec_all(); |
583 |
qemu_tcg_wait_io_event(); |
584 |
} |
585 |
|
586 |
return NULL; |
587 |
} |
588 |
|
589 |
void qemu_cpu_kick(void *_env) |
590 |
{ |
591 |
CPUState *env = _env; |
592 |
qemu_cond_broadcast(env->halt_cond); |
593 |
qemu_thread_signal(env->thread, SIG_IPI); |
594 |
} |
595 |
|
596 |
int qemu_cpu_self(void *_env) |
597 |
{ |
598 |
CPUState *env = _env; |
599 |
QemuThread this; |
600 |
|
601 |
qemu_thread_self(&this); |
602 |
|
603 |
return qemu_thread_equal(&this, env->thread);
|
604 |
} |
605 |
|
606 |
static void cpu_signal(int sig) |
607 |
{ |
608 |
if (cpu_single_env)
|
609 |
cpu_exit(cpu_single_env); |
610 |
exit_request = 1;
|
611 |
} |
612 |
|
613 |
static void tcg_init_ipi(void) |
614 |
{ |
615 |
sigset_t set; |
616 |
struct sigaction sigact;
|
617 |
|
618 |
memset(&sigact, 0, sizeof(sigact)); |
619 |
sigact.sa_handler = cpu_signal; |
620 |
sigaction(SIG_IPI, &sigact, NULL);
|
621 |
|
622 |
sigemptyset(&set); |
623 |
sigaddset(&set, SIG_IPI); |
624 |
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
|
625 |
} |
626 |
|
627 |
static void dummy_signal(int sig) |
628 |
{ |
629 |
} |
630 |
|
631 |
static void kvm_init_ipi(CPUState *env) |
632 |
{ |
633 |
int r;
|
634 |
sigset_t set; |
635 |
struct sigaction sigact;
|
636 |
|
637 |
memset(&sigact, 0, sizeof(sigact)); |
638 |
sigact.sa_handler = dummy_signal; |
639 |
sigaction(SIG_IPI, &sigact, NULL);
|
640 |
|
641 |
pthread_sigmask(SIG_BLOCK, NULL, &set);
|
642 |
sigdelset(&set, SIG_IPI); |
643 |
r = kvm_set_signal_mask(env, &set); |
644 |
if (r) {
|
645 |
fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(r));
|
646 |
exit(1);
|
647 |
} |
648 |
} |
649 |
|
650 |
static sigset_t block_io_signals(void) |
651 |
{ |
652 |
sigset_t set; |
653 |
|
654 |
/* SIGUSR2 used by posix-aio-compat.c */
|
655 |
sigemptyset(&set); |
656 |
sigaddset(&set, SIGUSR2); |
657 |
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
|
658 |
|
659 |
sigemptyset(&set); |
660 |
sigaddset(&set, SIGIO); |
661 |
sigaddset(&set, SIGALRM); |
662 |
sigaddset(&set, SIG_IPI); |
663 |
pthread_sigmask(SIG_BLOCK, &set, NULL);
|
664 |
|
665 |
return set;
|
666 |
} |
667 |
|
668 |
void qemu_mutex_lock_iothread(void) |
669 |
{ |
670 |
if (kvm_enabled()) {
|
671 |
qemu_mutex_lock(&qemu_fair_mutex); |
672 |
qemu_mutex_lock(&qemu_global_mutex); |
673 |
qemu_mutex_unlock(&qemu_fair_mutex); |
674 |
} else {
|
675 |
qemu_mutex_lock(&qemu_fair_mutex); |
676 |
if (qemu_mutex_trylock(&qemu_global_mutex)) {
|
677 |
qemu_thread_signal(tcg_cpu_thread, SIG_IPI); |
678 |
qemu_mutex_lock(&qemu_global_mutex); |
679 |
} |
680 |
qemu_mutex_unlock(&qemu_fair_mutex); |
681 |
} |
682 |
} |
683 |
|
684 |
void qemu_mutex_unlock_iothread(void) |
685 |
{ |
686 |
qemu_mutex_unlock(&qemu_global_mutex); |
687 |
} |
688 |
|
689 |
static int all_vcpus_paused(void) |
690 |
{ |
691 |
CPUState *penv = first_cpu; |
692 |
|
693 |
while (penv) {
|
694 |
if (!penv->stopped)
|
695 |
return 0; |
696 |
penv = (CPUState *)penv->next_cpu; |
697 |
} |
698 |
|
699 |
return 1; |
700 |
} |
701 |
|
702 |
void pause_all_vcpus(void) |
703 |
{ |
704 |
CPUState *penv = first_cpu; |
705 |
|
706 |
while (penv) {
|
707 |
penv->stop = 1;
|
708 |
qemu_cpu_kick(penv); |
709 |
penv = (CPUState *)penv->next_cpu; |
710 |
} |
711 |
|
712 |
while (!all_vcpus_paused()) {
|
713 |
qemu_cond_timedwait(&qemu_pause_cond, &qemu_global_mutex, 100);
|
714 |
penv = first_cpu; |
715 |
while (penv) {
|
716 |
qemu_cpu_kick(penv); |
717 |
penv = (CPUState *)penv->next_cpu; |
718 |
} |
719 |
} |
720 |
} |
721 |
|
722 |
void resume_all_vcpus(void) |
723 |
{ |
724 |
CPUState *penv = first_cpu; |
725 |
|
726 |
while (penv) {
|
727 |
penv->stop = 0;
|
728 |
penv->stopped = 0;
|
729 |
qemu_cpu_kick(penv); |
730 |
penv = (CPUState *)penv->next_cpu; |
731 |
} |
732 |
} |
733 |
|
734 |
static void tcg_init_vcpu(void *_env) |
735 |
{ |
736 |
CPUState *env = _env; |
737 |
/* share a single thread for all cpus with TCG */
|
738 |
if (!tcg_cpu_thread) {
|
739 |
env->thread = qemu_mallocz(sizeof(QemuThread));
|
740 |
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
|
741 |
qemu_cond_init(env->halt_cond); |
742 |
qemu_thread_create(env->thread, tcg_cpu_thread_fn, env); |
743 |
while (env->created == 0) |
744 |
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
|
745 |
tcg_cpu_thread = env->thread; |
746 |
tcg_halt_cond = env->halt_cond; |
747 |
} else {
|
748 |
env->thread = tcg_cpu_thread; |
749 |
env->halt_cond = tcg_halt_cond; |
750 |
} |
751 |
} |
752 |
|
753 |
static void kvm_start_vcpu(CPUState *env) |
754 |
{ |
755 |
env->thread = qemu_mallocz(sizeof(QemuThread));
|
756 |
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
|
757 |
qemu_cond_init(env->halt_cond); |
758 |
qemu_thread_create(env->thread, kvm_cpu_thread_fn, env); |
759 |
while (env->created == 0) |
760 |
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
|
761 |
} |
762 |
|
763 |
void qemu_init_vcpu(void *_env) |
764 |
{ |
765 |
CPUState *env = _env; |
766 |
|
767 |
env->nr_cores = smp_cores; |
768 |
env->nr_threads = smp_threads; |
769 |
if (kvm_enabled())
|
770 |
kvm_start_vcpu(env); |
771 |
else
|
772 |
tcg_init_vcpu(env); |
773 |
} |
774 |
|
775 |
void qemu_notify_event(void) |
776 |
{ |
777 |
qemu_event_increment(); |
778 |
} |
779 |
|
780 |
static void qemu_system_vmstop_request(int reason) |
781 |
{ |
782 |
vmstop_requested = reason; |
783 |
qemu_notify_event(); |
784 |
} |
785 |
|
786 |
void vm_stop(int reason) |
787 |
{ |
788 |
QemuThread me; |
789 |
qemu_thread_self(&me); |
790 |
|
791 |
if (!qemu_thread_equal(&me, &io_thread)) {
|
792 |
qemu_system_vmstop_request(reason); |
793 |
/*
|
794 |
* FIXME: should not return to device code in case
|
795 |
* vm_stop() has been requested.
|
796 |
*/
|
797 |
if (cpu_single_env) {
|
798 |
cpu_exit(cpu_single_env); |
799 |
cpu_single_env->stop = 1;
|
800 |
} |
801 |
return;
|
802 |
} |
803 |
do_vm_stop(reason); |
804 |
} |
805 |
|
806 |
#endif
|
807 |
|
808 |
static int qemu_cpu_exec(CPUState *env) |
809 |
{ |
810 |
int ret;
|
811 |
#ifdef CONFIG_PROFILER
|
812 |
int64_t ti; |
813 |
#endif
|
814 |
|
815 |
#ifdef CONFIG_PROFILER
|
816 |
ti = profile_getclock(); |
817 |
#endif
|
818 |
if (use_icount) {
|
819 |
int64_t count; |
820 |
int decr;
|
821 |
qemu_icount -= (env->icount_decr.u16.low + env->icount_extra); |
822 |
env->icount_decr.u16.low = 0;
|
823 |
env->icount_extra = 0;
|
824 |
count = qemu_icount_round (qemu_next_deadline()); |
825 |
qemu_icount += count; |
826 |
decr = (count > 0xffff) ? 0xffff : count; |
827 |
count -= decr; |
828 |
env->icount_decr.u16.low = decr; |
829 |
env->icount_extra = count; |
830 |
} |
831 |
ret = cpu_exec(env); |
832 |
#ifdef CONFIG_PROFILER
|
833 |
qemu_time += profile_getclock() - ti; |
834 |
#endif
|
835 |
if (use_icount) {
|
836 |
/* Fold pending instructions back into the
|
837 |
instruction counter, and clear the interrupt flag. */
|
838 |
qemu_icount -= (env->icount_decr.u16.low |
839 |
+ env->icount_extra); |
840 |
env->icount_decr.u32 = 0;
|
841 |
env->icount_extra = 0;
|
842 |
} |
843 |
return ret;
|
844 |
} |
845 |
|
846 |
bool cpu_exec_all(void) |
847 |
{ |
848 |
if (next_cpu == NULL) |
849 |
next_cpu = first_cpu; |
850 |
for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) { |
851 |
CPUState *env = next_cpu; |
852 |
|
853 |
qemu_clock_enable(vm_clock, |
854 |
(env->singlestep_enabled & SSTEP_NOTIMER) == 0);
|
855 |
|
856 |
if (qemu_alarm_pending())
|
857 |
break;
|
858 |
if (cpu_can_run(env)) {
|
859 |
if (qemu_cpu_exec(env) == EXCP_DEBUG) {
|
860 |
break;
|
861 |
} |
862 |
} else if (env->stop) { |
863 |
break;
|
864 |
} |
865 |
} |
866 |
exit_request = 0;
|
867 |
return any_cpu_has_work();
|
868 |
} |
869 |
|
870 |
void set_numa_modes(void) |
871 |
{ |
872 |
CPUState *env; |
873 |
int i;
|
874 |
|
875 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
876 |
for (i = 0; i < nb_numa_nodes; i++) { |
877 |
if (node_cpumask[i] & (1 << env->cpu_index)) { |
878 |
env->numa_node = i; |
879 |
} |
880 |
} |
881 |
} |
882 |
} |
883 |
|
884 |
void set_cpu_log(const char *optarg) |
885 |
{ |
886 |
int mask;
|
887 |
const CPULogItem *item;
|
888 |
|
889 |
mask = cpu_str_to_log_mask(optarg); |
890 |
if (!mask) {
|
891 |
printf("Log items (comma separated):\n");
|
892 |
for (item = cpu_log_items; item->mask != 0; item++) { |
893 |
printf("%-10s %s\n", item->name, item->help);
|
894 |
} |
895 |
exit(1);
|
896 |
} |
897 |
cpu_set_log(mask); |
898 |
} |
899 |
|
900 |
/* Return the virtual CPU time, based on the instruction counter. */
|
901 |
int64_t cpu_get_icount(void)
|
902 |
{ |
903 |
int64_t icount; |
904 |
CPUState *env = cpu_single_env;; |
905 |
|
906 |
icount = qemu_icount; |
907 |
if (env) {
|
908 |
if (!can_do_io(env)) {
|
909 |
fprintf(stderr, "Bad clock read\n");
|
910 |
} |
911 |
icount -= (env->icount_decr.u16.low + env->icount_extra); |
912 |
} |
913 |
return qemu_icount_bias + (icount << icount_time_shift);
|
914 |
} |
915 |
|
916 |
void list_cpus(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...), |
917 |
const char *optarg) |
918 |
{ |
919 |
/* XXX: implement xxx_cpu_list for targets that still miss it */
|
920 |
#if defined(cpu_list_id)
|
921 |
cpu_list_id(f, cpu_fprintf, optarg); |
922 |
#elif defined(cpu_list)
|
923 |
cpu_list(f, cpu_fprintf); /* deprecated */
|
924 |
#endif
|
925 |
} |