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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 "cpus.h" |
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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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static CPUState *cur_cpu;
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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; |
50 |
|
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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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} |
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|
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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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} |
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|
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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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} |
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|
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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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} |
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|
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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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} |
98 |
|
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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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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 tcg_has_work(void) |
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{ |
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CPUState *env; |
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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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} |
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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; |
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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); |
159 |
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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)); |
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} |
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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); |
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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); |
218 |
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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} |
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} |
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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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return qemu_event_init();
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} |
241 |
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void qemu_main_loop_start(void) |
243 |
{ |
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} |
245 |
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void qemu_init_vcpu(void *_env) |
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{ |
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CPUState *env = _env; |
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env->nr_cores = smp_cores; |
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env->nr_threads = smp_threads; |
252 |
if (kvm_enabled())
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kvm_init_vcpu(env); |
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return;
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} |
256 |
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int qemu_cpu_self(void *env) |
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{ |
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return 1; |
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} |
261 |
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void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
263 |
{ |
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func(data); |
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} |
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void resume_all_vcpus(void) |
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{ |
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} |
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void pause_all_vcpus(void) |
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{ |
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} |
274 |
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void qemu_cpu_kick(void *env) |
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{ |
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return;
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} |
279 |
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void qemu_notify_event(void) |
281 |
{ |
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CPUState *env = cpu_single_env; |
283 |
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qemu_event_increment (); |
285 |
if (env) {
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cpu_exit(env); |
287 |
} |
288 |
if (next_cpu && env != next_cpu) {
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cpu_exit(next_cpu); |
290 |
} |
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} |
292 |
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void qemu_mutex_lock_iothread(void) {} |
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void qemu_mutex_unlock_iothread(void) {} |
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void vm_stop(int reason) |
297 |
{ |
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do_vm_stop(reason); |
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} |
300 |
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#else /* CONFIG_IOTHREAD */ |
302 |
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#include "qemu-thread.h" |
304 |
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QemuMutex qemu_global_mutex; |
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static QemuMutex qemu_fair_mutex;
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static QemuThread io_thread;
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static QemuThread *tcg_cpu_thread;
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static QemuCond *tcg_halt_cond;
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static int qemu_system_ready; |
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/* cpu creation */
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static QemuCond qemu_cpu_cond;
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/* system init */
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static QemuCond qemu_system_cond;
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static QemuCond qemu_pause_cond;
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static QemuCond qemu_work_cond;
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static void tcg_block_io_signals(void); |
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static void kvm_block_io_signals(CPUState *env); |
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static void unblock_io_signals(void); |
324 |
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int qemu_init_main_loop(void) |
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{ |
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int ret;
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ret = qemu_event_init(); |
330 |
if (ret)
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return ret;
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qemu_cond_init(&qemu_pause_cond); |
334 |
qemu_mutex_init(&qemu_fair_mutex); |
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qemu_mutex_init(&qemu_global_mutex); |
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qemu_mutex_lock(&qemu_global_mutex); |
337 |
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unblock_io_signals(); |
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qemu_thread_self(&io_thread); |
340 |
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return 0; |
342 |
} |
343 |
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void qemu_main_loop_start(void) |
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{ |
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qemu_system_ready = 1;
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qemu_cond_broadcast(&qemu_system_cond); |
348 |
} |
349 |
|
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void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
351 |
{ |
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struct qemu_work_item wi;
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if (qemu_cpu_self(env)) {
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func(data); |
356 |
return;
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} |
358 |
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wi.func = func; |
360 |
wi.data = data; |
361 |
if (!env->queued_work_first)
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env->queued_work_first = &wi; |
363 |
else
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364 |
env->queued_work_last->next = &wi; |
365 |
env->queued_work_last = &wi; |
366 |
wi.next = NULL;
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367 |
wi.done = false;
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368 |
|
369 |
qemu_cpu_kick(env); |
370 |
while (!wi.done) {
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CPUState *self_env = cpu_single_env; |
372 |
|
373 |
qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex); |
374 |
cpu_single_env = self_env; |
375 |
} |
376 |
} |
377 |
|
378 |
static void flush_queued_work(CPUState *env) |
379 |
{ |
380 |
struct qemu_work_item *wi;
|
381 |
|
382 |
if (!env->queued_work_first)
|
383 |
return;
|
384 |
|
385 |
while ((wi = env->queued_work_first)) {
|
386 |
env->queued_work_first = wi->next; |
387 |
wi->func(wi->data); |
388 |
wi->done = true;
|
389 |
} |
390 |
env->queued_work_last = NULL;
|
391 |
qemu_cond_broadcast(&qemu_work_cond); |
392 |
} |
393 |
|
394 |
static void qemu_wait_io_event_common(CPUState *env) |
395 |
{ |
396 |
if (env->stop) {
|
397 |
env->stop = 0;
|
398 |
env->stopped = 1;
|
399 |
qemu_cond_signal(&qemu_pause_cond); |
400 |
} |
401 |
flush_queued_work(env); |
402 |
} |
403 |
|
404 |
static void qemu_wait_io_event(CPUState *env) |
405 |
{ |
406 |
while (!tcg_has_work())
|
407 |
qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
|
408 |
|
409 |
qemu_mutex_unlock(&qemu_global_mutex); |
410 |
|
411 |
/*
|
412 |
* Users of qemu_global_mutex can be starved, having no chance
|
413 |
* to acquire it since this path will get to it first.
|
414 |
* So use another lock to provide fairness.
|
415 |
*/
|
416 |
qemu_mutex_lock(&qemu_fair_mutex); |
417 |
qemu_mutex_unlock(&qemu_fair_mutex); |
418 |
|
419 |
qemu_mutex_lock(&qemu_global_mutex); |
420 |
qemu_wait_io_event_common(env); |
421 |
} |
422 |
|
423 |
static void qemu_kvm_eat_signal(CPUState *env, int timeout) |
424 |
{ |
425 |
struct timespec ts;
|
426 |
int r, e;
|
427 |
siginfo_t siginfo; |
428 |
sigset_t waitset; |
429 |
|
430 |
ts.tv_sec = timeout / 1000;
|
431 |
ts.tv_nsec = (timeout % 1000) * 1000000; |
432 |
|
433 |
sigemptyset(&waitset); |
434 |
sigaddset(&waitset, SIG_IPI); |
435 |
|
436 |
qemu_mutex_unlock(&qemu_global_mutex); |
437 |
r = sigtimedwait(&waitset, &siginfo, &ts); |
438 |
e = errno; |
439 |
qemu_mutex_lock(&qemu_global_mutex); |
440 |
|
441 |
if (r == -1 && !(e == EAGAIN || e == EINTR)) { |
442 |
fprintf(stderr, "sigtimedwait: %s\n", strerror(e));
|
443 |
exit(1);
|
444 |
} |
445 |
} |
446 |
|
447 |
static void qemu_kvm_wait_io_event(CPUState *env) |
448 |
{ |
449 |
while (!cpu_has_work(env))
|
450 |
qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
|
451 |
|
452 |
qemu_kvm_eat_signal(env, 0);
|
453 |
qemu_wait_io_event_common(env); |
454 |
} |
455 |
|
456 |
static int qemu_cpu_exec(CPUState *env); |
457 |
|
458 |
static void *kvm_cpu_thread_fn(void *arg) |
459 |
{ |
460 |
CPUState *env = arg; |
461 |
|
462 |
qemu_mutex_lock(&qemu_global_mutex); |
463 |
qemu_thread_self(env->thread); |
464 |
if (kvm_enabled())
|
465 |
kvm_init_vcpu(env); |
466 |
|
467 |
kvm_block_io_signals(env); |
468 |
|
469 |
/* signal CPU creation */
|
470 |
env->created = 1;
|
471 |
qemu_cond_signal(&qemu_cpu_cond); |
472 |
|
473 |
/* and wait for machine initialization */
|
474 |
while (!qemu_system_ready)
|
475 |
qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
|
476 |
|
477 |
while (1) { |
478 |
if (cpu_can_run(env))
|
479 |
qemu_cpu_exec(env); |
480 |
qemu_kvm_wait_io_event(env); |
481 |
} |
482 |
|
483 |
return NULL; |
484 |
} |
485 |
|
486 |
static void *tcg_cpu_thread_fn(void *arg) |
487 |
{ |
488 |
CPUState *env = arg; |
489 |
|
490 |
tcg_block_io_signals(); |
491 |
qemu_thread_self(env->thread); |
492 |
|
493 |
/* signal CPU creation */
|
494 |
qemu_mutex_lock(&qemu_global_mutex); |
495 |
for (env = first_cpu; env != NULL; env = env->next_cpu) |
496 |
env->created = 1;
|
497 |
qemu_cond_signal(&qemu_cpu_cond); |
498 |
|
499 |
/* and wait for machine initialization */
|
500 |
while (!qemu_system_ready)
|
501 |
qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
|
502 |
|
503 |
while (1) { |
504 |
tcg_cpu_exec(); |
505 |
qemu_wait_io_event(cur_cpu); |
506 |
} |
507 |
|
508 |
return NULL; |
509 |
} |
510 |
|
511 |
void qemu_cpu_kick(void *_env) |
512 |
{ |
513 |
CPUState *env = _env; |
514 |
qemu_cond_broadcast(env->halt_cond); |
515 |
qemu_thread_signal(env->thread, SIG_IPI); |
516 |
} |
517 |
|
518 |
int qemu_cpu_self(void *_env) |
519 |
{ |
520 |
CPUState *env = _env; |
521 |
QemuThread this; |
522 |
|
523 |
qemu_thread_self(&this); |
524 |
|
525 |
return qemu_thread_equal(&this, env->thread);
|
526 |
} |
527 |
|
528 |
static void cpu_signal(int sig) |
529 |
{ |
530 |
if (cpu_single_env)
|
531 |
cpu_exit(cpu_single_env); |
532 |
exit_request = 1;
|
533 |
} |
534 |
|
535 |
static void tcg_block_io_signals(void) |
536 |
{ |
537 |
sigset_t set; |
538 |
struct sigaction sigact;
|
539 |
|
540 |
sigemptyset(&set); |
541 |
sigaddset(&set, SIGUSR2); |
542 |
sigaddset(&set, SIGIO); |
543 |
sigaddset(&set, SIGALRM); |
544 |
sigaddset(&set, SIGCHLD); |
545 |
pthread_sigmask(SIG_BLOCK, &set, NULL);
|
546 |
|
547 |
sigemptyset(&set); |
548 |
sigaddset(&set, SIG_IPI); |
549 |
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
|
550 |
|
551 |
memset(&sigact, 0, sizeof(sigact)); |
552 |
sigact.sa_handler = cpu_signal; |
553 |
sigaction(SIG_IPI, &sigact, NULL);
|
554 |
} |
555 |
|
556 |
static void dummy_signal(int sig) |
557 |
{ |
558 |
} |
559 |
|
560 |
static void kvm_block_io_signals(CPUState *env) |
561 |
{ |
562 |
int r;
|
563 |
sigset_t set; |
564 |
struct sigaction sigact;
|
565 |
|
566 |
sigemptyset(&set); |
567 |
sigaddset(&set, SIGUSR2); |
568 |
sigaddset(&set, SIGIO); |
569 |
sigaddset(&set, SIGALRM); |
570 |
sigaddset(&set, SIGCHLD); |
571 |
sigaddset(&set, SIG_IPI); |
572 |
pthread_sigmask(SIG_BLOCK, &set, NULL);
|
573 |
|
574 |
pthread_sigmask(SIG_BLOCK, NULL, &set);
|
575 |
sigdelset(&set, SIG_IPI); |
576 |
|
577 |
memset(&sigact, 0, sizeof(sigact)); |
578 |
sigact.sa_handler = dummy_signal; |
579 |
sigaction(SIG_IPI, &sigact, NULL);
|
580 |
|
581 |
r = kvm_set_signal_mask(env, &set); |
582 |
if (r) {
|
583 |
fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(r));
|
584 |
exit(1);
|
585 |
} |
586 |
} |
587 |
|
588 |
static void unblock_io_signals(void) |
589 |
{ |
590 |
sigset_t set; |
591 |
|
592 |
sigemptyset(&set); |
593 |
sigaddset(&set, SIGUSR2); |
594 |
sigaddset(&set, SIGIO); |
595 |
sigaddset(&set, SIGALRM); |
596 |
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
|
597 |
|
598 |
sigemptyset(&set); |
599 |
sigaddset(&set, SIG_IPI); |
600 |
pthread_sigmask(SIG_BLOCK, &set, NULL);
|
601 |
} |
602 |
|
603 |
void qemu_mutex_lock_iothread(void) |
604 |
{ |
605 |
if (kvm_enabled()) {
|
606 |
qemu_mutex_lock(&qemu_fair_mutex); |
607 |
qemu_mutex_lock(&qemu_global_mutex); |
608 |
qemu_mutex_unlock(&qemu_fair_mutex); |
609 |
} else {
|
610 |
qemu_mutex_lock(&qemu_fair_mutex); |
611 |
if (qemu_mutex_trylock(&qemu_global_mutex)) {
|
612 |
qemu_thread_signal(tcg_cpu_thread, SIG_IPI); |
613 |
qemu_mutex_lock(&qemu_global_mutex); |
614 |
} |
615 |
qemu_mutex_unlock(&qemu_fair_mutex); |
616 |
} |
617 |
} |
618 |
|
619 |
void qemu_mutex_unlock_iothread(void) |
620 |
{ |
621 |
qemu_mutex_unlock(&qemu_global_mutex); |
622 |
} |
623 |
|
624 |
static int all_vcpus_paused(void) |
625 |
{ |
626 |
CPUState *penv = first_cpu; |
627 |
|
628 |
while (penv) {
|
629 |
if (!penv->stopped)
|
630 |
return 0; |
631 |
penv = (CPUState *)penv->next_cpu; |
632 |
} |
633 |
|
634 |
return 1; |
635 |
} |
636 |
|
637 |
void pause_all_vcpus(void) |
638 |
{ |
639 |
CPUState *penv = first_cpu; |
640 |
|
641 |
while (penv) {
|
642 |
penv->stop = 1;
|
643 |
qemu_cpu_kick(penv); |
644 |
penv = (CPUState *)penv->next_cpu; |
645 |
} |
646 |
|
647 |
while (!all_vcpus_paused()) {
|
648 |
qemu_cond_timedwait(&qemu_pause_cond, &qemu_global_mutex, 100);
|
649 |
penv = first_cpu; |
650 |
while (penv) {
|
651 |
qemu_cpu_kick(penv); |
652 |
penv = (CPUState *)penv->next_cpu; |
653 |
} |
654 |
} |
655 |
} |
656 |
|
657 |
void resume_all_vcpus(void) |
658 |
{ |
659 |
CPUState *penv = first_cpu; |
660 |
|
661 |
while (penv) {
|
662 |
penv->stop = 0;
|
663 |
penv->stopped = 0;
|
664 |
qemu_cpu_kick(penv); |
665 |
penv = (CPUState *)penv->next_cpu; |
666 |
} |
667 |
} |
668 |
|
669 |
static void tcg_init_vcpu(void *_env) |
670 |
{ |
671 |
CPUState *env = _env; |
672 |
/* share a single thread for all cpus with TCG */
|
673 |
if (!tcg_cpu_thread) {
|
674 |
env->thread = qemu_mallocz(sizeof(QemuThread));
|
675 |
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
|
676 |
qemu_cond_init(env->halt_cond); |
677 |
qemu_thread_create(env->thread, tcg_cpu_thread_fn, env); |
678 |
while (env->created == 0) |
679 |
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
|
680 |
tcg_cpu_thread = env->thread; |
681 |
tcg_halt_cond = env->halt_cond; |
682 |
} else {
|
683 |
env->thread = tcg_cpu_thread; |
684 |
env->halt_cond = tcg_halt_cond; |
685 |
} |
686 |
} |
687 |
|
688 |
static void kvm_start_vcpu(CPUState *env) |
689 |
{ |
690 |
env->thread = qemu_mallocz(sizeof(QemuThread));
|
691 |
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
|
692 |
qemu_cond_init(env->halt_cond); |
693 |
qemu_thread_create(env->thread, kvm_cpu_thread_fn, env); |
694 |
while (env->created == 0) |
695 |
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
|
696 |
} |
697 |
|
698 |
void qemu_init_vcpu(void *_env) |
699 |
{ |
700 |
CPUState *env = _env; |
701 |
|
702 |
env->nr_cores = smp_cores; |
703 |
env->nr_threads = smp_threads; |
704 |
if (kvm_enabled())
|
705 |
kvm_start_vcpu(env); |
706 |
else
|
707 |
tcg_init_vcpu(env); |
708 |
} |
709 |
|
710 |
void qemu_notify_event(void) |
711 |
{ |
712 |
qemu_event_increment(); |
713 |
} |
714 |
|
715 |
static void qemu_system_vmstop_request(int reason) |
716 |
{ |
717 |
vmstop_requested = reason; |
718 |
qemu_notify_event(); |
719 |
} |
720 |
|
721 |
void vm_stop(int reason) |
722 |
{ |
723 |
QemuThread me; |
724 |
qemu_thread_self(&me); |
725 |
|
726 |
if (!qemu_thread_equal(&me, &io_thread)) {
|
727 |
qemu_system_vmstop_request(reason); |
728 |
/*
|
729 |
* FIXME: should not return to device code in case
|
730 |
* vm_stop() has been requested.
|
731 |
*/
|
732 |
if (cpu_single_env) {
|
733 |
cpu_exit(cpu_single_env); |
734 |
cpu_single_env->stop = 1;
|
735 |
} |
736 |
return;
|
737 |
} |
738 |
do_vm_stop(reason); |
739 |
} |
740 |
|
741 |
#endif
|
742 |
|
743 |
static int qemu_cpu_exec(CPUState *env) |
744 |
{ |
745 |
int ret;
|
746 |
#ifdef CONFIG_PROFILER
|
747 |
int64_t ti; |
748 |
#endif
|
749 |
|
750 |
#ifdef CONFIG_PROFILER
|
751 |
ti = profile_getclock(); |
752 |
#endif
|
753 |
if (use_icount) {
|
754 |
int64_t count; |
755 |
int decr;
|
756 |
qemu_icount -= (env->icount_decr.u16.low + env->icount_extra); |
757 |
env->icount_decr.u16.low = 0;
|
758 |
env->icount_extra = 0;
|
759 |
count = qemu_icount_round (qemu_next_deadline()); |
760 |
qemu_icount += count; |
761 |
decr = (count > 0xffff) ? 0xffff : count; |
762 |
count -= decr; |
763 |
env->icount_decr.u16.low = decr; |
764 |
env->icount_extra = count; |
765 |
} |
766 |
ret = cpu_exec(env); |
767 |
#ifdef CONFIG_PROFILER
|
768 |
qemu_time += profile_getclock() - ti; |
769 |
#endif
|
770 |
if (use_icount) {
|
771 |
/* Fold pending instructions back into the
|
772 |
instruction counter, and clear the interrupt flag. */
|
773 |
qemu_icount -= (env->icount_decr.u16.low |
774 |
+ env->icount_extra); |
775 |
env->icount_decr.u32 = 0;
|
776 |
env->icount_extra = 0;
|
777 |
} |
778 |
return ret;
|
779 |
} |
780 |
|
781 |
bool tcg_cpu_exec(void) |
782 |
{ |
783 |
int ret = 0; |
784 |
|
785 |
if (next_cpu == NULL) |
786 |
next_cpu = first_cpu; |
787 |
for (; next_cpu != NULL; next_cpu = next_cpu->next_cpu) { |
788 |
CPUState *env = cur_cpu = next_cpu; |
789 |
|
790 |
qemu_clock_enable(vm_clock, |
791 |
(cur_cpu->singlestep_enabled & SSTEP_NOTIMER) == 0);
|
792 |
|
793 |
if (qemu_alarm_pending())
|
794 |
break;
|
795 |
if (cpu_can_run(env))
|
796 |
ret = qemu_cpu_exec(env); |
797 |
else if (env->stop) |
798 |
break;
|
799 |
|
800 |
if (ret == EXCP_DEBUG) {
|
801 |
gdb_set_stop_cpu(env); |
802 |
debug_requested = EXCP_DEBUG; |
803 |
break;
|
804 |
} |
805 |
} |
806 |
return tcg_has_work();
|
807 |
} |
808 |
|
809 |
void set_numa_modes(void) |
810 |
{ |
811 |
CPUState *env; |
812 |
int i;
|
813 |
|
814 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
815 |
for (i = 0; i < nb_numa_nodes; i++) { |
816 |
if (node_cpumask[i] & (1 << env->cpu_index)) { |
817 |
env->numa_node = i; |
818 |
} |
819 |
} |
820 |
} |
821 |
} |
822 |
|
823 |
void set_cpu_log(const char *optarg) |
824 |
{ |
825 |
int mask;
|
826 |
const CPULogItem *item;
|
827 |
|
828 |
mask = cpu_str_to_log_mask(optarg); |
829 |
if (!mask) {
|
830 |
printf("Log items (comma separated):\n");
|
831 |
for (item = cpu_log_items; item->mask != 0; item++) { |
832 |
printf("%-10s %s\n", item->name, item->help);
|
833 |
} |
834 |
exit(1);
|
835 |
} |
836 |
cpu_set_log(mask); |
837 |
} |
838 |
|
839 |
/* Return the virtual CPU time, based on the instruction counter. */
|
840 |
int64_t cpu_get_icount(void)
|
841 |
{ |
842 |
int64_t icount; |
843 |
CPUState *env = cpu_single_env;; |
844 |
|
845 |
icount = qemu_icount; |
846 |
if (env) {
|
847 |
if (!can_do_io(env)) {
|
848 |
fprintf(stderr, "Bad clock read\n");
|
849 |
} |
850 |
icount -= (env->icount_decr.u16.low + env->icount_extra); |
851 |
} |
852 |
return qemu_icount_bias + (icount << icount_time_shift);
|
853 |
} |
854 |
|
855 |
void list_cpus(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...), |
856 |
const char *optarg) |
857 |
{ |
858 |
/* XXX: implement xxx_cpu_list for targets that still miss it */
|
859 |
#if defined(cpu_list_id)
|
860 |
cpu_list_id(f, cpu_fprintf, optarg); |
861 |
#elif defined(cpu_list)
|
862 |
cpu_list(f, cpu_fprintf); /* deprecated */
|
863 |
#endif
|
864 |
} |