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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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#ifdef CONFIG_LINUX
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#include <sys/prctl.h> |
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#endif
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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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#ifndef PR_MCE_KILL
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#define PR_MCE_KILL 33 |
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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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void hw_error(const char *fmt, ...) |
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{ |
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va_list ap; |
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CPUState *env; |
58 |
|
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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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} |
74 |
|
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void cpu_synchronize_all_states(void) |
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{ |
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CPUState *cpu; |
78 |
|
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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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} |
83 |
|
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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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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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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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} |
101 |
|
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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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} |
106 |
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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; |
145 |
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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; |
149 |
return 0; |
150 |
} |
151 |
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static void cpu_debug_handler(CPUState *env) |
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{ |
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gdb_set_stop_cpu(env); |
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debug_requested = EXCP_DEBUG; |
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vm_stop(EXCP_DEBUG); |
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} |
158 |
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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); |
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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]; |
188 |
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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); |
201 |
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); |
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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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} |
240 |
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static void qemu_event_increment(void) |
242 |
{ |
243 |
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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cpu_set_debug_excp_handler(cpu_debug_handler); |
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return qemu_event_init();
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} |
258 |
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void qemu_main_loop_start(void) |
260 |
{ |
261 |
} |
262 |
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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; |
268 |
env->nr_threads = smp_threads; |
269 |
if (kvm_enabled())
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kvm_init_vcpu(env); |
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return;
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} |
273 |
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int qemu_cpu_self(void *env) |
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{ |
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return 1; |
277 |
} |
278 |
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void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
280 |
{ |
281 |
func(data); |
282 |
} |
283 |
|
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void resume_all_vcpus(void) |
285 |
{ |
286 |
} |
287 |
|
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void pause_all_vcpus(void) |
289 |
{ |
290 |
} |
291 |
|
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void qemu_cpu_kick(void *env) |
293 |
{ |
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return;
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} |
296 |
|
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void qemu_notify_event(void) |
298 |
{ |
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CPUState *env = cpu_single_env; |
300 |
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qemu_event_increment (); |
302 |
if (env) {
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cpu_exit(env); |
304 |
} |
305 |
if (next_cpu && env != next_cpu) {
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cpu_exit(next_cpu); |
307 |
} |
308 |
} |
309 |
|
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void qemu_mutex_lock_iothread(void) {} |
311 |
void qemu_mutex_unlock_iothread(void) {} |
312 |
|
313 |
void vm_stop(int reason) |
314 |
{ |
315 |
do_vm_stop(reason); |
316 |
} |
317 |
|
318 |
#else /* CONFIG_IOTHREAD */ |
319 |
|
320 |
#include "qemu-thread.h" |
321 |
|
322 |
QemuMutex qemu_global_mutex; |
323 |
static QemuMutex qemu_fair_mutex;
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324 |
|
325 |
static QemuThread io_thread;
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326 |
|
327 |
static QemuThread *tcg_cpu_thread;
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328 |
static QemuCond *tcg_halt_cond;
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329 |
|
330 |
static int qemu_system_ready; |
331 |
/* cpu creation */
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332 |
static QemuCond qemu_cpu_cond;
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333 |
/* system init */
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334 |
static QemuCond qemu_system_cond;
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335 |
static QemuCond qemu_pause_cond;
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336 |
static QemuCond qemu_work_cond;
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337 |
|
338 |
static void tcg_init_ipi(void); |
339 |
static void kvm_init_ipi(CPUState *env); |
340 |
static sigset_t block_io_signals(void); |
341 |
|
342 |
/* If we have signalfd, we mask out the signals we want to handle and then
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343 |
* use signalfd to listen for them. We rely on whatever the current signal
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344 |
* handler is to dispatch the signals when we receive them.
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345 |
*/
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346 |
static void sigfd_handler(void *opaque) |
347 |
{ |
348 |
int fd = (unsigned long) opaque; |
349 |
struct qemu_signalfd_siginfo info;
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350 |
struct sigaction action;
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351 |
ssize_t len; |
352 |
|
353 |
while (1) { |
354 |
do {
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355 |
len = read(fd, &info, sizeof(info));
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356 |
} while (len == -1 && errno == EINTR); |
357 |
|
358 |
if (len == -1 && errno == EAGAIN) { |
359 |
break;
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360 |
} |
361 |
|
362 |
if (len != sizeof(info)) { |
363 |
printf("read from sigfd returned %zd: %m\n", len);
|
364 |
return;
|
365 |
} |
366 |
|
367 |
sigaction(info.ssi_signo, NULL, &action);
|
368 |
if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
|
369 |
action.sa_sigaction(info.ssi_signo, |
370 |
(siginfo_t *)&info, NULL);
|
371 |
} else if (action.sa_handler) { |
372 |
action.sa_handler(info.ssi_signo); |
373 |
} |
374 |
} |
375 |
} |
376 |
|
377 |
static int qemu_signalfd_init(sigset_t mask) |
378 |
{ |
379 |
int sigfd;
|
380 |
|
381 |
sigfd = qemu_signalfd(&mask); |
382 |
if (sigfd == -1) { |
383 |
fprintf(stderr, "failed to create signalfd\n");
|
384 |
return -errno;
|
385 |
} |
386 |
|
387 |
fcntl_setfl(sigfd, O_NONBLOCK); |
388 |
|
389 |
qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, |
390 |
(void *)(unsigned long) sigfd); |
391 |
|
392 |
return 0; |
393 |
} |
394 |
|
395 |
int qemu_init_main_loop(void) |
396 |
{ |
397 |
int ret;
|
398 |
sigset_t blocked_signals; |
399 |
|
400 |
cpu_set_debug_excp_handler(cpu_debug_handler); |
401 |
|
402 |
blocked_signals = block_io_signals(); |
403 |
|
404 |
ret = qemu_signalfd_init(blocked_signals); |
405 |
if (ret)
|
406 |
return ret;
|
407 |
|
408 |
/* Note eventfd must be drained before signalfd handlers run */
|
409 |
ret = qemu_event_init(); |
410 |
if (ret)
|
411 |
return ret;
|
412 |
|
413 |
qemu_cond_init(&qemu_pause_cond); |
414 |
qemu_cond_init(&qemu_system_cond); |
415 |
qemu_mutex_init(&qemu_fair_mutex); |
416 |
qemu_mutex_init(&qemu_global_mutex); |
417 |
qemu_mutex_lock(&qemu_global_mutex); |
418 |
|
419 |
qemu_thread_self(&io_thread); |
420 |
|
421 |
return 0; |
422 |
} |
423 |
|
424 |
void qemu_main_loop_start(void) |
425 |
{ |
426 |
qemu_system_ready = 1;
|
427 |
qemu_cond_broadcast(&qemu_system_cond); |
428 |
} |
429 |
|
430 |
void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
431 |
{ |
432 |
struct qemu_work_item wi;
|
433 |
|
434 |
if (qemu_cpu_self(env)) {
|
435 |
func(data); |
436 |
return;
|
437 |
} |
438 |
|
439 |
wi.func = func; |
440 |
wi.data = data; |
441 |
if (!env->queued_work_first)
|
442 |
env->queued_work_first = &wi; |
443 |
else
|
444 |
env->queued_work_last->next = &wi; |
445 |
env->queued_work_last = &wi; |
446 |
wi.next = NULL;
|
447 |
wi.done = false;
|
448 |
|
449 |
qemu_cpu_kick(env); |
450 |
while (!wi.done) {
|
451 |
CPUState *self_env = cpu_single_env; |
452 |
|
453 |
qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex); |
454 |
cpu_single_env = self_env; |
455 |
} |
456 |
} |
457 |
|
458 |
static void flush_queued_work(CPUState *env) |
459 |
{ |
460 |
struct qemu_work_item *wi;
|
461 |
|
462 |
if (!env->queued_work_first)
|
463 |
return;
|
464 |
|
465 |
while ((wi = env->queued_work_first)) {
|
466 |
env->queued_work_first = wi->next; |
467 |
wi->func(wi->data); |
468 |
wi->done = true;
|
469 |
} |
470 |
env->queued_work_last = NULL;
|
471 |
qemu_cond_broadcast(&qemu_work_cond); |
472 |
} |
473 |
|
474 |
static void qemu_wait_io_event_common(CPUState *env) |
475 |
{ |
476 |
if (env->stop) {
|
477 |
env->stop = 0;
|
478 |
env->stopped = 1;
|
479 |
qemu_cond_signal(&qemu_pause_cond); |
480 |
} |
481 |
flush_queued_work(env); |
482 |
} |
483 |
|
484 |
static void qemu_tcg_wait_io_event(void) |
485 |
{ |
486 |
CPUState *env; |
487 |
|
488 |
while (!any_cpu_has_work())
|
489 |
qemu_cond_timedwait(tcg_halt_cond, &qemu_global_mutex, 1000);
|
490 |
|
491 |
qemu_mutex_unlock(&qemu_global_mutex); |
492 |
|
493 |
/*
|
494 |
* Users of qemu_global_mutex can be starved, having no chance
|
495 |
* to acquire it since this path will get to it first.
|
496 |
* So use another lock to provide fairness.
|
497 |
*/
|
498 |
qemu_mutex_lock(&qemu_fair_mutex); |
499 |
qemu_mutex_unlock(&qemu_fair_mutex); |
500 |
|
501 |
qemu_mutex_lock(&qemu_global_mutex); |
502 |
|
503 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
504 |
qemu_wait_io_event_common(env); |
505 |
} |
506 |
} |
507 |
|
508 |
static void sigbus_reraise(void) |
509 |
{ |
510 |
sigset_t set; |
511 |
struct sigaction action;
|
512 |
|
513 |
memset(&action, 0, sizeof(action)); |
514 |
action.sa_handler = SIG_DFL; |
515 |
if (!sigaction(SIGBUS, &action, NULL)) { |
516 |
raise(SIGBUS); |
517 |
sigemptyset(&set); |
518 |
sigaddset(&set, SIGBUS); |
519 |
sigprocmask(SIG_UNBLOCK, &set, NULL);
|
520 |
} |
521 |
perror("Failed to re-raise SIGBUS!\n");
|
522 |
abort(); |
523 |
} |
524 |
|
525 |
static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo, |
526 |
void *ctx)
|
527 |
{ |
528 |
#if defined(TARGET_I386)
|
529 |
if (kvm_on_sigbus(siginfo->ssi_code, (void *)(intptr_t)siginfo->ssi_addr)) |
530 |
#endif
|
531 |
sigbus_reraise(); |
532 |
} |
533 |
|
534 |
static void qemu_kvm_eat_signal(CPUState *env, int timeout) |
535 |
{ |
536 |
struct timespec ts;
|
537 |
int r, e;
|
538 |
siginfo_t siginfo; |
539 |
sigset_t waitset; |
540 |
sigset_t chkset; |
541 |
|
542 |
ts.tv_sec = timeout / 1000;
|
543 |
ts.tv_nsec = (timeout % 1000) * 1000000; |
544 |
|
545 |
sigemptyset(&waitset); |
546 |
sigaddset(&waitset, SIG_IPI); |
547 |
sigaddset(&waitset, SIGBUS); |
548 |
|
549 |
do {
|
550 |
qemu_mutex_unlock(&qemu_global_mutex); |
551 |
|
552 |
r = sigtimedwait(&waitset, &siginfo, &ts); |
553 |
e = errno; |
554 |
|
555 |
qemu_mutex_lock(&qemu_global_mutex); |
556 |
|
557 |
if (r == -1 && !(e == EAGAIN || e == EINTR)) { |
558 |
fprintf(stderr, "sigtimedwait: %s\n", strerror(e));
|
559 |
exit(1);
|
560 |
} |
561 |
|
562 |
switch (r) {
|
563 |
case SIGBUS:
|
564 |
#ifdef TARGET_I386
|
565 |
if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr))
|
566 |
#endif
|
567 |
sigbus_reraise(); |
568 |
break;
|
569 |
default:
|
570 |
break;
|
571 |
} |
572 |
|
573 |
r = sigpending(&chkset); |
574 |
if (r == -1) { |
575 |
fprintf(stderr, "sigpending: %s\n", strerror(e));
|
576 |
exit(1);
|
577 |
} |
578 |
} while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
|
579 |
} |
580 |
|
581 |
static void qemu_kvm_wait_io_event(CPUState *env) |
582 |
{ |
583 |
while (!cpu_has_work(env))
|
584 |
qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
|
585 |
|
586 |
qemu_kvm_eat_signal(env, 0);
|
587 |
qemu_wait_io_event_common(env); |
588 |
} |
589 |
|
590 |
static int qemu_cpu_exec(CPUState *env); |
591 |
|
592 |
static void *kvm_cpu_thread_fn(void *arg) |
593 |
{ |
594 |
CPUState *env = arg; |
595 |
|
596 |
qemu_mutex_lock(&qemu_global_mutex); |
597 |
qemu_thread_self(env->thread); |
598 |
if (kvm_enabled())
|
599 |
kvm_init_vcpu(env); |
600 |
|
601 |
kvm_init_ipi(env); |
602 |
|
603 |
/* signal CPU creation */
|
604 |
env->created = 1;
|
605 |
qemu_cond_signal(&qemu_cpu_cond); |
606 |
|
607 |
/* and wait for machine initialization */
|
608 |
while (!qemu_system_ready)
|
609 |
qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
|
610 |
|
611 |
while (1) { |
612 |
if (cpu_can_run(env))
|
613 |
qemu_cpu_exec(env); |
614 |
qemu_kvm_wait_io_event(env); |
615 |
} |
616 |
|
617 |
return NULL; |
618 |
} |
619 |
|
620 |
static void *tcg_cpu_thread_fn(void *arg) |
621 |
{ |
622 |
CPUState *env = arg; |
623 |
|
624 |
tcg_init_ipi(); |
625 |
qemu_thread_self(env->thread); |
626 |
|
627 |
/* signal CPU creation */
|
628 |
qemu_mutex_lock(&qemu_global_mutex); |
629 |
for (env = first_cpu; env != NULL; env = env->next_cpu) |
630 |
env->created = 1;
|
631 |
qemu_cond_signal(&qemu_cpu_cond); |
632 |
|
633 |
/* and wait for machine initialization */
|
634 |
while (!qemu_system_ready)
|
635 |
qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
|
636 |
|
637 |
while (1) { |
638 |
cpu_exec_all(); |
639 |
qemu_tcg_wait_io_event(); |
640 |
} |
641 |
|
642 |
return NULL; |
643 |
} |
644 |
|
645 |
void qemu_cpu_kick(void *_env) |
646 |
{ |
647 |
CPUState *env = _env; |
648 |
qemu_cond_broadcast(env->halt_cond); |
649 |
qemu_thread_signal(env->thread, SIG_IPI); |
650 |
} |
651 |
|
652 |
int qemu_cpu_self(void *_env) |
653 |
{ |
654 |
CPUState *env = _env; |
655 |
QemuThread this; |
656 |
|
657 |
qemu_thread_self(&this); |
658 |
|
659 |
return qemu_thread_equal(&this, env->thread);
|
660 |
} |
661 |
|
662 |
static void cpu_signal(int sig) |
663 |
{ |
664 |
if (cpu_single_env)
|
665 |
cpu_exit(cpu_single_env); |
666 |
exit_request = 1;
|
667 |
} |
668 |
|
669 |
static void tcg_init_ipi(void) |
670 |
{ |
671 |
sigset_t set; |
672 |
struct sigaction sigact;
|
673 |
|
674 |
memset(&sigact, 0, sizeof(sigact)); |
675 |
sigact.sa_handler = cpu_signal; |
676 |
sigaction(SIG_IPI, &sigact, NULL);
|
677 |
|
678 |
sigemptyset(&set); |
679 |
sigaddset(&set, SIG_IPI); |
680 |
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
|
681 |
} |
682 |
|
683 |
static void dummy_signal(int sig) |
684 |
{ |
685 |
} |
686 |
|
687 |
static void kvm_init_ipi(CPUState *env) |
688 |
{ |
689 |
int r;
|
690 |
sigset_t set; |
691 |
struct sigaction sigact;
|
692 |
|
693 |
memset(&sigact, 0, sizeof(sigact)); |
694 |
sigact.sa_handler = dummy_signal; |
695 |
sigaction(SIG_IPI, &sigact, NULL);
|
696 |
|
697 |
pthread_sigmask(SIG_BLOCK, NULL, &set);
|
698 |
sigdelset(&set, SIG_IPI); |
699 |
sigdelset(&set, SIGBUS); |
700 |
r = kvm_set_signal_mask(env, &set); |
701 |
if (r) {
|
702 |
fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(r));
|
703 |
exit(1);
|
704 |
} |
705 |
} |
706 |
|
707 |
static sigset_t block_io_signals(void) |
708 |
{ |
709 |
sigset_t set; |
710 |
struct sigaction action;
|
711 |
|
712 |
/* SIGUSR2 used by posix-aio-compat.c */
|
713 |
sigemptyset(&set); |
714 |
sigaddset(&set, SIGUSR2); |
715 |
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
|
716 |
|
717 |
sigemptyset(&set); |
718 |
sigaddset(&set, SIGIO); |
719 |
sigaddset(&set, SIGALRM); |
720 |
sigaddset(&set, SIG_IPI); |
721 |
sigaddset(&set, SIGBUS); |
722 |
pthread_sigmask(SIG_BLOCK, &set, NULL);
|
723 |
|
724 |
memset(&action, 0, sizeof(action)); |
725 |
action.sa_flags = SA_SIGINFO; |
726 |
action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler; |
727 |
sigaction(SIGBUS, &action, NULL);
|
728 |
prctl(PR_MCE_KILL, 1, 1, 0, 0); |
729 |
|
730 |
return set;
|
731 |
} |
732 |
|
733 |
void qemu_mutex_lock_iothread(void) |
734 |
{ |
735 |
if (kvm_enabled()) {
|
736 |
qemu_mutex_lock(&qemu_fair_mutex); |
737 |
qemu_mutex_lock(&qemu_global_mutex); |
738 |
qemu_mutex_unlock(&qemu_fair_mutex); |
739 |
} else {
|
740 |
qemu_mutex_lock(&qemu_fair_mutex); |
741 |
if (qemu_mutex_trylock(&qemu_global_mutex)) {
|
742 |
qemu_thread_signal(tcg_cpu_thread, SIG_IPI); |
743 |
qemu_mutex_lock(&qemu_global_mutex); |
744 |
} |
745 |
qemu_mutex_unlock(&qemu_fair_mutex); |
746 |
} |
747 |
} |
748 |
|
749 |
void qemu_mutex_unlock_iothread(void) |
750 |
{ |
751 |
qemu_mutex_unlock(&qemu_global_mutex); |
752 |
} |
753 |
|
754 |
static int all_vcpus_paused(void) |
755 |
{ |
756 |
CPUState *penv = first_cpu; |
757 |
|
758 |
while (penv) {
|
759 |
if (!penv->stopped)
|
760 |
return 0; |
761 |
penv = (CPUState *)penv->next_cpu; |
762 |
} |
763 |
|
764 |
return 1; |
765 |
} |
766 |
|
767 |
void pause_all_vcpus(void) |
768 |
{ |
769 |
CPUState *penv = first_cpu; |
770 |
|
771 |
while (penv) {
|
772 |
penv->stop = 1;
|
773 |
qemu_cpu_kick(penv); |
774 |
penv = (CPUState *)penv->next_cpu; |
775 |
} |
776 |
|
777 |
while (!all_vcpus_paused()) {
|
778 |
qemu_cond_timedwait(&qemu_pause_cond, &qemu_global_mutex, 100);
|
779 |
penv = first_cpu; |
780 |
while (penv) {
|
781 |
qemu_cpu_kick(penv); |
782 |
penv = (CPUState *)penv->next_cpu; |
783 |
} |
784 |
} |
785 |
} |
786 |
|
787 |
void resume_all_vcpus(void) |
788 |
{ |
789 |
CPUState *penv = first_cpu; |
790 |
|
791 |
while (penv) {
|
792 |
penv->stop = 0;
|
793 |
penv->stopped = 0;
|
794 |
qemu_cpu_kick(penv); |
795 |
penv = (CPUState *)penv->next_cpu; |
796 |
} |
797 |
} |
798 |
|
799 |
static void tcg_init_vcpu(void *_env) |
800 |
{ |
801 |
CPUState *env = _env; |
802 |
/* share a single thread for all cpus with TCG */
|
803 |
if (!tcg_cpu_thread) {
|
804 |
env->thread = qemu_mallocz(sizeof(QemuThread));
|
805 |
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
|
806 |
qemu_cond_init(env->halt_cond); |
807 |
qemu_thread_create(env->thread, tcg_cpu_thread_fn, env); |
808 |
while (env->created == 0) |
809 |
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
|
810 |
tcg_cpu_thread = env->thread; |
811 |
tcg_halt_cond = env->halt_cond; |
812 |
} else {
|
813 |
env->thread = tcg_cpu_thread; |
814 |
env->halt_cond = tcg_halt_cond; |
815 |
} |
816 |
} |
817 |
|
818 |
static void kvm_start_vcpu(CPUState *env) |
819 |
{ |
820 |
env->thread = qemu_mallocz(sizeof(QemuThread));
|
821 |
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
|
822 |
qemu_cond_init(env->halt_cond); |
823 |
qemu_thread_create(env->thread, kvm_cpu_thread_fn, env); |
824 |
while (env->created == 0) |
825 |
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
|
826 |
} |
827 |
|
828 |
void qemu_init_vcpu(void *_env) |
829 |
{ |
830 |
CPUState *env = _env; |
831 |
|
832 |
env->nr_cores = smp_cores; |
833 |
env->nr_threads = smp_threads; |
834 |
if (kvm_enabled())
|
835 |
kvm_start_vcpu(env); |
836 |
else
|
837 |
tcg_init_vcpu(env); |
838 |
} |
839 |
|
840 |
void qemu_notify_event(void) |
841 |
{ |
842 |
qemu_event_increment(); |
843 |
} |
844 |
|
845 |
static void qemu_system_vmstop_request(int reason) |
846 |
{ |
847 |
vmstop_requested = reason; |
848 |
qemu_notify_event(); |
849 |
} |
850 |
|
851 |
void vm_stop(int reason) |
852 |
{ |
853 |
QemuThread me; |
854 |
qemu_thread_self(&me); |
855 |
|
856 |
if (!qemu_thread_equal(&me, &io_thread)) {
|
857 |
qemu_system_vmstop_request(reason); |
858 |
/*
|
859 |
* FIXME: should not return to device code in case
|
860 |
* vm_stop() has been requested.
|
861 |
*/
|
862 |
if (cpu_single_env) {
|
863 |
cpu_exit(cpu_single_env); |
864 |
cpu_single_env->stop = 1;
|
865 |
} |
866 |
return;
|
867 |
} |
868 |
do_vm_stop(reason); |
869 |
} |
870 |
|
871 |
#endif
|
872 |
|
873 |
static int qemu_cpu_exec(CPUState *env) |
874 |
{ |
875 |
int ret;
|
876 |
#ifdef CONFIG_PROFILER
|
877 |
int64_t ti; |
878 |
#endif
|
879 |
|
880 |
#ifdef CONFIG_PROFILER
|
881 |
ti = profile_getclock(); |
882 |
#endif
|
883 |
if (use_icount) {
|
884 |
int64_t count; |
885 |
int decr;
|
886 |
qemu_icount -= (env->icount_decr.u16.low + env->icount_extra); |
887 |
env->icount_decr.u16.low = 0;
|
888 |
env->icount_extra = 0;
|
889 |
count = qemu_icount_round (qemu_next_deadline()); |
890 |
qemu_icount += count; |
891 |
decr = (count > 0xffff) ? 0xffff : count; |
892 |
count -= decr; |
893 |
env->icount_decr.u16.low = decr; |
894 |
env->icount_extra = count; |
895 |
} |
896 |
ret = cpu_exec(env); |
897 |
#ifdef CONFIG_PROFILER
|
898 |
qemu_time += profile_getclock() - ti; |
899 |
#endif
|
900 |
if (use_icount) {
|
901 |
/* Fold pending instructions back into the
|
902 |
instruction counter, and clear the interrupt flag. */
|
903 |
qemu_icount -= (env->icount_decr.u16.low |
904 |
+ env->icount_extra); |
905 |
env->icount_decr.u32 = 0;
|
906 |
env->icount_extra = 0;
|
907 |
} |
908 |
return ret;
|
909 |
} |
910 |
|
911 |
bool cpu_exec_all(void) |
912 |
{ |
913 |
if (next_cpu == NULL) |
914 |
next_cpu = first_cpu; |
915 |
for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) { |
916 |
CPUState *env = next_cpu; |
917 |
|
918 |
qemu_clock_enable(vm_clock, |
919 |
(env->singlestep_enabled & SSTEP_NOTIMER) == 0);
|
920 |
|
921 |
if (qemu_alarm_pending())
|
922 |
break;
|
923 |
if (cpu_can_run(env)) {
|
924 |
if (qemu_cpu_exec(env) == EXCP_DEBUG) {
|
925 |
break;
|
926 |
} |
927 |
} else if (env->stop) { |
928 |
break;
|
929 |
} |
930 |
} |
931 |
exit_request = 0;
|
932 |
return any_cpu_has_work();
|
933 |
} |
934 |
|
935 |
void set_numa_modes(void) |
936 |
{ |
937 |
CPUState *env; |
938 |
int i;
|
939 |
|
940 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
941 |
for (i = 0; i < nb_numa_nodes; i++) { |
942 |
if (node_cpumask[i] & (1 << env->cpu_index)) { |
943 |
env->numa_node = i; |
944 |
} |
945 |
} |
946 |
} |
947 |
} |
948 |
|
949 |
void set_cpu_log(const char *optarg) |
950 |
{ |
951 |
int mask;
|
952 |
const CPULogItem *item;
|
953 |
|
954 |
mask = cpu_str_to_log_mask(optarg); |
955 |
if (!mask) {
|
956 |
printf("Log items (comma separated):\n");
|
957 |
for (item = cpu_log_items; item->mask != 0; item++) { |
958 |
printf("%-10s %s\n", item->name, item->help);
|
959 |
} |
960 |
exit(1);
|
961 |
} |
962 |
cpu_set_log(mask); |
963 |
} |
964 |
|
965 |
/* Return the virtual CPU time, based on the instruction counter. */
|
966 |
int64_t cpu_get_icount(void)
|
967 |
{ |
968 |
int64_t icount; |
969 |
CPUState *env = cpu_single_env;; |
970 |
|
971 |
icount = qemu_icount; |
972 |
if (env) {
|
973 |
if (!can_do_io(env)) {
|
974 |
fprintf(stderr, "Bad clock read\n");
|
975 |
} |
976 |
icount -= (env->icount_decr.u16.low + env->icount_extra); |
977 |
} |
978 |
return qemu_icount_bias + (icount << icount_time_shift);
|
979 |
} |
980 |
|
981 |
void list_cpus(FILE *f, fprintf_function cpu_fprintf, const char *optarg) |
982 |
{ |
983 |
/* XXX: implement xxx_cpu_list for targets that still miss it */
|
984 |
#if defined(cpu_list_id)
|
985 |
cpu_list_id(f, cpu_fprintf, optarg); |
986 |
#elif defined(cpu_list)
|
987 |
cpu_list(f, cpu_fprintf); /* deprecated */
|
988 |
#endif
|
989 |
} |