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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/monitor.h" |
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#include "sysemu.h" |
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#include "exec/gdbstub.h" |
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#include "dma.h" |
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#include "kvm.h" |
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#include "qmp-commands.h" |
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#include "qemu/thread.h" |
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#include "cpus.h" |
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#include "qtest.h" |
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#include "qemu/main-loop.h" |
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#include "qemu/bitmap.h" |
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#ifndef _WIN32
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#include "qemu/compatfd.h" |
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#endif
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#ifdef CONFIG_LINUX
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#include <sys/prctl.h> |
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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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#ifndef PR_MCE_KILL_SET
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#define PR_MCE_KILL_SET 1 |
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#endif
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#ifndef PR_MCE_KILL_EARLY
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#define PR_MCE_KILL_EARLY 1 |
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#endif
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#endif /* CONFIG_LINUX */ |
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static CPUArchState *next_cpu;
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static bool cpu_thread_is_idle(CPUArchState *env) |
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{ |
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CPUState *cpu = ENV_GET_CPU(env); |
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if (cpu->stop || cpu->queued_work_first) {
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return false; |
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} |
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if (cpu->stopped || !runstate_is_running()) {
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return true; |
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} |
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if (!env->halted || qemu_cpu_has_work(cpu) ||
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kvm_async_interrupts_enabled()) { |
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return false; |
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} |
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return true; |
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} |
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static bool all_cpu_threads_idle(void) |
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{ |
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CPUArchState *env; |
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for (env = first_cpu; env != NULL; env = env->next_cpu) { |
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if (!cpu_thread_is_idle(env)) {
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return false; |
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} |
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} |
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return true; |
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} |
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/***********************************************************/
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/* guest cycle counter */
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/* Conversion factor from emulated instructions to virtual clock ticks. */
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static int icount_time_shift; |
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/* Arbitrarily pick 1MIPS as the minimum allowable speed. */
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#define MAX_ICOUNT_SHIFT 10 |
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/* Compensate for varying guest execution speed. */
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static int64_t qemu_icount_bias;
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static QEMUTimer *icount_rt_timer;
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static QEMUTimer *icount_vm_timer;
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static QEMUTimer *icount_warp_timer;
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static int64_t vm_clock_warp_start;
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static int64_t qemu_icount;
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typedef struct TimersState { |
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int64_t cpu_ticks_prev; |
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int64_t cpu_ticks_offset; |
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int64_t cpu_clock_offset; |
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int32_t cpu_ticks_enabled; |
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int64_t dummy; |
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} TimersState; |
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TimersState timers_state; |
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/* Return the virtual CPU time, based on the instruction counter. */
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int64_t cpu_get_icount(void)
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{ |
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int64_t icount; |
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CPUArchState *env = cpu_single_env; |
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icount = qemu_icount; |
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if (env) {
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if (!can_do_io(env)) {
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fprintf(stderr, "Bad clock read\n");
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} |
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icount -= (env->icount_decr.u16.low + env->icount_extra); |
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} |
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return qemu_icount_bias + (icount << icount_time_shift);
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} |
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/* return the host CPU cycle counter and handle stop/restart */
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int64_t cpu_get_ticks(void)
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{ |
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if (use_icount) {
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return cpu_get_icount();
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} |
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if (!timers_state.cpu_ticks_enabled) {
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return timers_state.cpu_ticks_offset;
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} else {
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int64_t ticks; |
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ticks = cpu_get_real_ticks(); |
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if (timers_state.cpu_ticks_prev > ticks) {
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/* Note: non increasing ticks may happen if the host uses
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software suspend */
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timers_state.cpu_ticks_offset += timers_state.cpu_ticks_prev - ticks; |
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} |
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timers_state.cpu_ticks_prev = ticks; |
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return ticks + timers_state.cpu_ticks_offset;
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} |
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} |
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/* return the host CPU monotonic timer and handle stop/restart */
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int64_t cpu_get_clock(void)
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{ |
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int64_t ti; |
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if (!timers_state.cpu_ticks_enabled) {
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return timers_state.cpu_clock_offset;
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} else {
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ti = get_clock(); |
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return ti + timers_state.cpu_clock_offset;
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} |
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} |
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/* enable cpu_get_ticks() */
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void cpu_enable_ticks(void) |
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{ |
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if (!timers_state.cpu_ticks_enabled) {
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timers_state.cpu_ticks_offset -= cpu_get_real_ticks(); |
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timers_state.cpu_clock_offset -= get_clock(); |
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timers_state.cpu_ticks_enabled = 1;
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} |
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} |
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/* disable cpu_get_ticks() : the clock is stopped. You must not call
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cpu_get_ticks() after that. */
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void cpu_disable_ticks(void) |
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{ |
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if (timers_state.cpu_ticks_enabled) {
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timers_state.cpu_ticks_offset = cpu_get_ticks(); |
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timers_state.cpu_clock_offset = cpu_get_clock(); |
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timers_state.cpu_ticks_enabled = 0;
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} |
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} |
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/* Correlation between real and virtual time is always going to be
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fairly approximate, so ignore small variation.
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When the guest is idle real and virtual time will be aligned in
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the IO wait loop. */
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#define ICOUNT_WOBBLE (get_ticks_per_sec() / 10) |
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static void icount_adjust(void) |
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{ |
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int64_t cur_time; |
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int64_t cur_icount; |
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int64_t delta; |
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static int64_t last_delta;
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/* If the VM is not running, then do nothing. */
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if (!runstate_is_running()) {
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return;
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} |
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cur_time = cpu_get_clock(); |
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cur_icount = qemu_get_clock_ns(vm_clock); |
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delta = cur_icount - cur_time; |
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/* FIXME: This is a very crude algorithm, somewhat prone to oscillation. */
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if (delta > 0 |
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&& last_delta + ICOUNT_WOBBLE < delta * 2
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&& icount_time_shift > 0) {
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/* The guest is getting too far ahead. Slow time down. */
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icount_time_shift--; |
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} |
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if (delta < 0 |
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&& last_delta - ICOUNT_WOBBLE > delta * 2
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&& icount_time_shift < MAX_ICOUNT_SHIFT) { |
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/* The guest is getting too far behind. Speed time up. */
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icount_time_shift++; |
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} |
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last_delta = delta; |
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qemu_icount_bias = cur_icount - (qemu_icount << icount_time_shift); |
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} |
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static void icount_adjust_rt(void *opaque) |
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{ |
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qemu_mod_timer(icount_rt_timer, |
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qemu_get_clock_ms(rt_clock) + 1000);
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icount_adjust(); |
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} |
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static void icount_adjust_vm(void *opaque) |
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{ |
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qemu_mod_timer(icount_vm_timer, |
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qemu_get_clock_ns(vm_clock) + get_ticks_per_sec() / 10);
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icount_adjust(); |
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} |
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static int64_t qemu_icount_round(int64_t count)
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{ |
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return (count + (1 << icount_time_shift) - 1) >> icount_time_shift; |
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} |
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static void icount_warp_rt(void *opaque) |
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{ |
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if (vm_clock_warp_start == -1) { |
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return;
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} |
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if (runstate_is_running()) {
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int64_t clock = qemu_get_clock_ns(rt_clock); |
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int64_t warp_delta = clock - vm_clock_warp_start; |
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if (use_icount == 1) { |
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qemu_icount_bias += warp_delta; |
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} else {
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/*
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* In adaptive mode, do not let the vm_clock run too
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* far ahead of real time.
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*/
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int64_t cur_time = cpu_get_clock(); |
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int64_t cur_icount = qemu_get_clock_ns(vm_clock); |
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int64_t delta = cur_time - cur_icount; |
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qemu_icount_bias += MIN(warp_delta, delta); |
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} |
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if (qemu_clock_expired(vm_clock)) {
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qemu_notify_event(); |
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} |
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} |
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vm_clock_warp_start = -1;
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} |
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void qtest_clock_warp(int64_t dest)
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{ |
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int64_t clock = qemu_get_clock_ns(vm_clock); |
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assert(qtest_enabled()); |
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while (clock < dest) {
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int64_t deadline = qemu_clock_deadline(vm_clock); |
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int64_t warp = MIN(dest - clock, deadline); |
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qemu_icount_bias += warp; |
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qemu_run_timers(vm_clock); |
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clock = qemu_get_clock_ns(vm_clock); |
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} |
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qemu_notify_event(); |
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} |
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void qemu_clock_warp(QEMUClock *clock)
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{ |
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int64_t deadline; |
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/*
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* There are too many global variables to make the "warp" behavior
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* applicable to other clocks. But a clock argument removes the
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* need for if statements all over the place.
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*/
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if (clock != vm_clock || !use_icount) {
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return;
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} |
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/*
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* If the CPUs have been sleeping, advance the vm_clock timer now. This
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* ensures that the deadline for the timer is computed correctly below.
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* This also makes sure that the insn counter is synchronized before the
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* CPU starts running, in case the CPU is woken by an event other than
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* the earliest vm_clock timer.
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*/
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icount_warp_rt(NULL);
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if (!all_cpu_threads_idle() || !qemu_clock_has_timers(vm_clock)) {
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qemu_del_timer(icount_warp_timer); |
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return;
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} |
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if (qtest_enabled()) {
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/* When testing, qtest commands advance icount. */
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return;
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} |
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vm_clock_warp_start = qemu_get_clock_ns(rt_clock); |
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deadline = qemu_clock_deadline(vm_clock); |
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if (deadline > 0) { |
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/*
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* Ensure the vm_clock proceeds even when the virtual CPU goes to
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* sleep. Otherwise, the CPU might be waiting for a future timer
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* interrupt to wake it up, but the interrupt never comes because
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* the vCPU isn't running any insns and thus doesn't advance the
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* vm_clock.
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*
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* An extreme solution for this problem would be to never let VCPUs
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* sleep in icount mode if there is a pending vm_clock timer; rather
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* time could just advance to the next vm_clock event. Instead, we
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* do stop VCPUs and only advance vm_clock after some "real" time,
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* (related to the time left until the next event) has passed. This
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* rt_clock timer will do this. This avoids that the warps are too
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* visible externally---for example, you will not be sending network
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* packets continuously instead of every 100ms.
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*/
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qemu_mod_timer(icount_warp_timer, vm_clock_warp_start + deadline); |
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} else {
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qemu_notify_event(); |
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} |
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} |
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static const VMStateDescription vmstate_timers = { |
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.name = "timer",
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.version_id = 2,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField[]) { |
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VMSTATE_INT64(cpu_ticks_offset, TimersState), |
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VMSTATE_INT64(dummy, TimersState), |
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VMSTATE_INT64_V(cpu_clock_offset, TimersState, 2),
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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void configure_icount(const char *option) |
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{ |
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vmstate_register(NULL, 0, &vmstate_timers, &timers_state); |
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if (!option) {
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return;
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} |
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icount_warp_timer = qemu_new_timer_ns(rt_clock, icount_warp_rt, NULL);
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if (strcmp(option, "auto") != 0) { |
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icount_time_shift = strtol(option, NULL, 0); |
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use_icount = 1;
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return;
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} |
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use_icount = 2;
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/* 125MIPS seems a reasonable initial guess at the guest speed.
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It will be corrected fairly quickly anyway. */
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icount_time_shift = 3;
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/* Have both realtime and virtual time triggers for speed adjustment.
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The realtime trigger catches emulated time passing too slowly,
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the virtual time trigger catches emulated time passing too fast.
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Realtime triggers occur even when idle, so use them less frequently
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than VM triggers. */
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icount_rt_timer = qemu_new_timer_ms(rt_clock, icount_adjust_rt, NULL);
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qemu_mod_timer(icount_rt_timer, |
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qemu_get_clock_ms(rt_clock) + 1000);
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icount_vm_timer = qemu_new_timer_ns(vm_clock, icount_adjust_vm, NULL);
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qemu_mod_timer(icount_vm_timer, |
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qemu_get_clock_ns(vm_clock) + get_ticks_per_sec() / 10);
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} |
387 |
|
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/***********************************************************/
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void hw_error(const char *fmt, ...) |
390 |
{ |
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va_list ap; |
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CPUArchState *env; |
393 |
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va_start(ap, fmt); |
395 |
fprintf(stderr, "qemu: hardware error: ");
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vfprintf(stderr, fmt, ap); |
397 |
fprintf(stderr, "\n");
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for(env = first_cpu; env != NULL; env = env->next_cpu) { |
399 |
fprintf(stderr, "CPU #%d:\n", env->cpu_index);
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cpu_dump_state(env, stderr, fprintf, CPU_DUMP_FPU); |
401 |
} |
402 |
va_end(ap); |
403 |
abort(); |
404 |
} |
405 |
|
406 |
void cpu_synchronize_all_states(void) |
407 |
{ |
408 |
CPUArchState *cpu; |
409 |
|
410 |
for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
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411 |
cpu_synchronize_state(cpu); |
412 |
} |
413 |
} |
414 |
|
415 |
void cpu_synchronize_all_post_reset(void) |
416 |
{ |
417 |
CPUArchState *cpu; |
418 |
|
419 |
for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
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420 |
cpu_synchronize_post_reset(cpu); |
421 |
} |
422 |
} |
423 |
|
424 |
void cpu_synchronize_all_post_init(void) |
425 |
{ |
426 |
CPUArchState *cpu; |
427 |
|
428 |
for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
|
429 |
cpu_synchronize_post_init(cpu); |
430 |
} |
431 |
} |
432 |
|
433 |
bool cpu_is_stopped(CPUState *cpu)
|
434 |
{ |
435 |
return !runstate_is_running() || cpu->stopped;
|
436 |
} |
437 |
|
438 |
static void do_vm_stop(RunState state) |
439 |
{ |
440 |
if (runstate_is_running()) {
|
441 |
cpu_disable_ticks(); |
442 |
pause_all_vcpus(); |
443 |
runstate_set(state); |
444 |
vm_state_notify(0, state);
|
445 |
bdrv_drain_all(); |
446 |
bdrv_flush_all(); |
447 |
monitor_protocol_event(QEVENT_STOP, NULL);
|
448 |
} |
449 |
} |
450 |
|
451 |
static bool cpu_can_run(CPUState *cpu) |
452 |
{ |
453 |
if (cpu->stop) {
|
454 |
return false; |
455 |
} |
456 |
if (cpu->stopped || !runstate_is_running()) {
|
457 |
return false; |
458 |
} |
459 |
return true; |
460 |
} |
461 |
|
462 |
static void cpu_handle_guest_debug(CPUArchState *env) |
463 |
{ |
464 |
CPUState *cpu = ENV_GET_CPU(env); |
465 |
|
466 |
gdb_set_stop_cpu(env); |
467 |
qemu_system_debug_request(); |
468 |
cpu->stopped = true;
|
469 |
} |
470 |
|
471 |
static void cpu_signal(int sig) |
472 |
{ |
473 |
if (cpu_single_env) {
|
474 |
cpu_exit(cpu_single_env); |
475 |
} |
476 |
exit_request = 1;
|
477 |
} |
478 |
|
479 |
#ifdef CONFIG_LINUX
|
480 |
static void sigbus_reraise(void) |
481 |
{ |
482 |
sigset_t set; |
483 |
struct sigaction action;
|
484 |
|
485 |
memset(&action, 0, sizeof(action)); |
486 |
action.sa_handler = SIG_DFL; |
487 |
if (!sigaction(SIGBUS, &action, NULL)) { |
488 |
raise(SIGBUS); |
489 |
sigemptyset(&set); |
490 |
sigaddset(&set, SIGBUS); |
491 |
sigprocmask(SIG_UNBLOCK, &set, NULL);
|
492 |
} |
493 |
perror("Failed to re-raise SIGBUS!\n");
|
494 |
abort(); |
495 |
} |
496 |
|
497 |
static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo, |
498 |
void *ctx)
|
499 |
{ |
500 |
if (kvm_on_sigbus(siginfo->ssi_code,
|
501 |
(void *)(intptr_t)siginfo->ssi_addr)) {
|
502 |
sigbus_reraise(); |
503 |
} |
504 |
} |
505 |
|
506 |
static void qemu_init_sigbus(void) |
507 |
{ |
508 |
struct sigaction action;
|
509 |
|
510 |
memset(&action, 0, sizeof(action)); |
511 |
action.sa_flags = SA_SIGINFO; |
512 |
action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler; |
513 |
sigaction(SIGBUS, &action, NULL);
|
514 |
|
515 |
prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); |
516 |
} |
517 |
|
518 |
static void qemu_kvm_eat_signals(CPUArchState *env) |
519 |
{ |
520 |
struct timespec ts = { 0, 0 }; |
521 |
siginfo_t siginfo; |
522 |
sigset_t waitset; |
523 |
sigset_t chkset; |
524 |
int r;
|
525 |
|
526 |
sigemptyset(&waitset); |
527 |
sigaddset(&waitset, SIG_IPI); |
528 |
sigaddset(&waitset, SIGBUS); |
529 |
|
530 |
do {
|
531 |
r = sigtimedwait(&waitset, &siginfo, &ts); |
532 |
if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { |
533 |
perror("sigtimedwait");
|
534 |
exit(1);
|
535 |
} |
536 |
|
537 |
switch (r) {
|
538 |
case SIGBUS:
|
539 |
if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
|
540 |
sigbus_reraise(); |
541 |
} |
542 |
break;
|
543 |
default:
|
544 |
break;
|
545 |
} |
546 |
|
547 |
r = sigpending(&chkset); |
548 |
if (r == -1) { |
549 |
perror("sigpending");
|
550 |
exit(1);
|
551 |
} |
552 |
} while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
|
553 |
} |
554 |
|
555 |
#else /* !CONFIG_LINUX */ |
556 |
|
557 |
static void qemu_init_sigbus(void) |
558 |
{ |
559 |
} |
560 |
|
561 |
static void qemu_kvm_eat_signals(CPUArchState *env) |
562 |
{ |
563 |
} |
564 |
#endif /* !CONFIG_LINUX */ |
565 |
|
566 |
#ifndef _WIN32
|
567 |
static void dummy_signal(int sig) |
568 |
{ |
569 |
} |
570 |
|
571 |
static void qemu_kvm_init_cpu_signals(CPUArchState *env) |
572 |
{ |
573 |
int r;
|
574 |
sigset_t set; |
575 |
struct sigaction sigact;
|
576 |
|
577 |
memset(&sigact, 0, sizeof(sigact)); |
578 |
sigact.sa_handler = dummy_signal; |
579 |
sigaction(SIG_IPI, &sigact, NULL);
|
580 |
|
581 |
pthread_sigmask(SIG_BLOCK, NULL, &set);
|
582 |
sigdelset(&set, SIG_IPI); |
583 |
sigdelset(&set, SIGBUS); |
584 |
r = kvm_set_signal_mask(env, &set); |
585 |
if (r) {
|
586 |
fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
|
587 |
exit(1);
|
588 |
} |
589 |
} |
590 |
|
591 |
static void qemu_tcg_init_cpu_signals(void) |
592 |
{ |
593 |
sigset_t set; |
594 |
struct sigaction sigact;
|
595 |
|
596 |
memset(&sigact, 0, sizeof(sigact)); |
597 |
sigact.sa_handler = cpu_signal; |
598 |
sigaction(SIG_IPI, &sigact, NULL);
|
599 |
|
600 |
sigemptyset(&set); |
601 |
sigaddset(&set, SIG_IPI); |
602 |
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
|
603 |
} |
604 |
|
605 |
#else /* _WIN32 */ |
606 |
static void qemu_kvm_init_cpu_signals(CPUArchState *env) |
607 |
{ |
608 |
abort(); |
609 |
} |
610 |
|
611 |
static void qemu_tcg_init_cpu_signals(void) |
612 |
{ |
613 |
} |
614 |
#endif /* _WIN32 */ |
615 |
|
616 |
static QemuMutex qemu_global_mutex;
|
617 |
static QemuCond qemu_io_proceeded_cond;
|
618 |
static bool iothread_requesting_mutex; |
619 |
|
620 |
static QemuThread io_thread;
|
621 |
|
622 |
static QemuThread *tcg_cpu_thread;
|
623 |
static QemuCond *tcg_halt_cond;
|
624 |
|
625 |
/* cpu creation */
|
626 |
static QemuCond qemu_cpu_cond;
|
627 |
/* system init */
|
628 |
static QemuCond qemu_pause_cond;
|
629 |
static QemuCond qemu_work_cond;
|
630 |
|
631 |
void qemu_init_cpu_loop(void) |
632 |
{ |
633 |
qemu_init_sigbus(); |
634 |
qemu_cond_init(&qemu_cpu_cond); |
635 |
qemu_cond_init(&qemu_pause_cond); |
636 |
qemu_cond_init(&qemu_work_cond); |
637 |
qemu_cond_init(&qemu_io_proceeded_cond); |
638 |
qemu_mutex_init(&qemu_global_mutex); |
639 |
|
640 |
qemu_thread_get_self(&io_thread); |
641 |
} |
642 |
|
643 |
void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data) |
644 |
{ |
645 |
struct qemu_work_item wi;
|
646 |
|
647 |
if (qemu_cpu_is_self(cpu)) {
|
648 |
func(data); |
649 |
return;
|
650 |
} |
651 |
|
652 |
wi.func = func; |
653 |
wi.data = data; |
654 |
if (cpu->queued_work_first == NULL) { |
655 |
cpu->queued_work_first = &wi; |
656 |
} else {
|
657 |
cpu->queued_work_last->next = &wi; |
658 |
} |
659 |
cpu->queued_work_last = &wi; |
660 |
wi.next = NULL;
|
661 |
wi.done = false;
|
662 |
|
663 |
qemu_cpu_kick(cpu); |
664 |
while (!wi.done) {
|
665 |
CPUArchState *self_env = cpu_single_env; |
666 |
|
667 |
qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex); |
668 |
cpu_single_env = self_env; |
669 |
} |
670 |
} |
671 |
|
672 |
static void flush_queued_work(CPUState *cpu) |
673 |
{ |
674 |
struct qemu_work_item *wi;
|
675 |
|
676 |
if (cpu->queued_work_first == NULL) { |
677 |
return;
|
678 |
} |
679 |
|
680 |
while ((wi = cpu->queued_work_first)) {
|
681 |
cpu->queued_work_first = wi->next; |
682 |
wi->func(wi->data); |
683 |
wi->done = true;
|
684 |
} |
685 |
cpu->queued_work_last = NULL;
|
686 |
qemu_cond_broadcast(&qemu_work_cond); |
687 |
} |
688 |
|
689 |
static void qemu_wait_io_event_common(CPUState *cpu) |
690 |
{ |
691 |
if (cpu->stop) {
|
692 |
cpu->stop = false;
|
693 |
cpu->stopped = true;
|
694 |
qemu_cond_signal(&qemu_pause_cond); |
695 |
} |
696 |
flush_queued_work(cpu); |
697 |
cpu->thread_kicked = false;
|
698 |
} |
699 |
|
700 |
static void qemu_tcg_wait_io_event(void) |
701 |
{ |
702 |
CPUArchState *env; |
703 |
|
704 |
while (all_cpu_threads_idle()) {
|
705 |
/* Start accounting real time to the virtual clock if the CPUs
|
706 |
are idle. */
|
707 |
qemu_clock_warp(vm_clock); |
708 |
qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex); |
709 |
} |
710 |
|
711 |
while (iothread_requesting_mutex) {
|
712 |
qemu_cond_wait(&qemu_io_proceeded_cond, &qemu_global_mutex); |
713 |
} |
714 |
|
715 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
716 |
qemu_wait_io_event_common(ENV_GET_CPU(env)); |
717 |
} |
718 |
} |
719 |
|
720 |
static void qemu_kvm_wait_io_event(CPUArchState *env) |
721 |
{ |
722 |
CPUState *cpu = ENV_GET_CPU(env); |
723 |
|
724 |
while (cpu_thread_is_idle(env)) {
|
725 |
qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); |
726 |
} |
727 |
|
728 |
qemu_kvm_eat_signals(env); |
729 |
qemu_wait_io_event_common(cpu); |
730 |
} |
731 |
|
732 |
static void *qemu_kvm_cpu_thread_fn(void *arg) |
733 |
{ |
734 |
CPUArchState *env = arg; |
735 |
CPUState *cpu = ENV_GET_CPU(env); |
736 |
int r;
|
737 |
|
738 |
qemu_mutex_lock(&qemu_global_mutex); |
739 |
qemu_thread_get_self(cpu->thread); |
740 |
cpu->thread_id = qemu_get_thread_id(); |
741 |
cpu_single_env = env; |
742 |
|
743 |
r = kvm_init_vcpu(env); |
744 |
if (r < 0) { |
745 |
fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r));
|
746 |
exit(1);
|
747 |
} |
748 |
|
749 |
qemu_kvm_init_cpu_signals(env); |
750 |
|
751 |
/* signal CPU creation */
|
752 |
cpu->created = true;
|
753 |
qemu_cond_signal(&qemu_cpu_cond); |
754 |
|
755 |
while (1) { |
756 |
if (cpu_can_run(cpu)) {
|
757 |
r = kvm_cpu_exec(env); |
758 |
if (r == EXCP_DEBUG) {
|
759 |
cpu_handle_guest_debug(env); |
760 |
} |
761 |
} |
762 |
qemu_kvm_wait_io_event(env); |
763 |
} |
764 |
|
765 |
return NULL; |
766 |
} |
767 |
|
768 |
static void *qemu_dummy_cpu_thread_fn(void *arg) |
769 |
{ |
770 |
#ifdef _WIN32
|
771 |
fprintf(stderr, "qtest is not supported under Windows\n");
|
772 |
exit(1);
|
773 |
#else
|
774 |
CPUArchState *env = arg; |
775 |
CPUState *cpu = ENV_GET_CPU(env); |
776 |
sigset_t waitset; |
777 |
int r;
|
778 |
|
779 |
qemu_mutex_lock_iothread(); |
780 |
qemu_thread_get_self(cpu->thread); |
781 |
cpu->thread_id = qemu_get_thread_id(); |
782 |
|
783 |
sigemptyset(&waitset); |
784 |
sigaddset(&waitset, SIG_IPI); |
785 |
|
786 |
/* signal CPU creation */
|
787 |
cpu->created = true;
|
788 |
qemu_cond_signal(&qemu_cpu_cond); |
789 |
|
790 |
cpu_single_env = env; |
791 |
while (1) { |
792 |
cpu_single_env = NULL;
|
793 |
qemu_mutex_unlock_iothread(); |
794 |
do {
|
795 |
int sig;
|
796 |
r = sigwait(&waitset, &sig); |
797 |
} while (r == -1 && (errno == EAGAIN || errno == EINTR)); |
798 |
if (r == -1) { |
799 |
perror("sigwait");
|
800 |
exit(1);
|
801 |
} |
802 |
qemu_mutex_lock_iothread(); |
803 |
cpu_single_env = env; |
804 |
qemu_wait_io_event_common(cpu); |
805 |
} |
806 |
|
807 |
return NULL; |
808 |
#endif
|
809 |
} |
810 |
|
811 |
static void tcg_exec_all(void); |
812 |
|
813 |
static void *qemu_tcg_cpu_thread_fn(void *arg) |
814 |
{ |
815 |
CPUState *cpu = arg; |
816 |
CPUArchState *env; |
817 |
|
818 |
qemu_tcg_init_cpu_signals(); |
819 |
qemu_thread_get_self(cpu->thread); |
820 |
|
821 |
/* signal CPU creation */
|
822 |
qemu_mutex_lock(&qemu_global_mutex); |
823 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
824 |
cpu = ENV_GET_CPU(env); |
825 |
cpu->thread_id = qemu_get_thread_id(); |
826 |
cpu->created = true;
|
827 |
} |
828 |
qemu_cond_signal(&qemu_cpu_cond); |
829 |
|
830 |
/* wait for initial kick-off after machine start */
|
831 |
while (ENV_GET_CPU(first_cpu)->stopped) {
|
832 |
qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex); |
833 |
|
834 |
/* process any pending work */
|
835 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
836 |
qemu_wait_io_event_common(ENV_GET_CPU(env)); |
837 |
} |
838 |
} |
839 |
|
840 |
while (1) { |
841 |
tcg_exec_all(); |
842 |
if (use_icount && qemu_clock_deadline(vm_clock) <= 0) { |
843 |
qemu_notify_event(); |
844 |
} |
845 |
qemu_tcg_wait_io_event(); |
846 |
} |
847 |
|
848 |
return NULL; |
849 |
} |
850 |
|
851 |
static void qemu_cpu_kick_thread(CPUState *cpu) |
852 |
{ |
853 |
#ifndef _WIN32
|
854 |
int err;
|
855 |
|
856 |
err = pthread_kill(cpu->thread->thread, SIG_IPI); |
857 |
if (err) {
|
858 |
fprintf(stderr, "qemu:%s: %s", __func__, strerror(err));
|
859 |
exit(1);
|
860 |
} |
861 |
#else /* _WIN32 */ |
862 |
if (!qemu_cpu_is_self(cpu)) {
|
863 |
SuspendThread(cpu->hThread); |
864 |
cpu_signal(0);
|
865 |
ResumeThread(cpu->hThread); |
866 |
} |
867 |
#endif
|
868 |
} |
869 |
|
870 |
void qemu_cpu_kick(CPUState *cpu)
|
871 |
{ |
872 |
qemu_cond_broadcast(cpu->halt_cond); |
873 |
if (!tcg_enabled() && !cpu->thread_kicked) {
|
874 |
qemu_cpu_kick_thread(cpu); |
875 |
cpu->thread_kicked = true;
|
876 |
} |
877 |
} |
878 |
|
879 |
void qemu_cpu_kick_self(void) |
880 |
{ |
881 |
#ifndef _WIN32
|
882 |
assert(cpu_single_env); |
883 |
CPUState *cpu_single_cpu = ENV_GET_CPU(cpu_single_env); |
884 |
|
885 |
if (!cpu_single_cpu->thread_kicked) {
|
886 |
qemu_cpu_kick_thread(cpu_single_cpu); |
887 |
cpu_single_cpu->thread_kicked = true;
|
888 |
} |
889 |
#else
|
890 |
abort(); |
891 |
#endif
|
892 |
} |
893 |
|
894 |
bool qemu_cpu_is_self(CPUState *cpu)
|
895 |
{ |
896 |
return qemu_thread_is_self(cpu->thread);
|
897 |
} |
898 |
|
899 |
static bool qemu_in_vcpu_thread(void) |
900 |
{ |
901 |
return cpu_single_env && qemu_cpu_is_self(ENV_GET_CPU(cpu_single_env));
|
902 |
} |
903 |
|
904 |
void qemu_mutex_lock_iothread(void) |
905 |
{ |
906 |
if (!tcg_enabled()) {
|
907 |
qemu_mutex_lock(&qemu_global_mutex); |
908 |
} else {
|
909 |
iothread_requesting_mutex = true;
|
910 |
if (qemu_mutex_trylock(&qemu_global_mutex)) {
|
911 |
qemu_cpu_kick_thread(ENV_GET_CPU(first_cpu)); |
912 |
qemu_mutex_lock(&qemu_global_mutex); |
913 |
} |
914 |
iothread_requesting_mutex = false;
|
915 |
qemu_cond_broadcast(&qemu_io_proceeded_cond); |
916 |
} |
917 |
} |
918 |
|
919 |
void qemu_mutex_unlock_iothread(void) |
920 |
{ |
921 |
qemu_mutex_unlock(&qemu_global_mutex); |
922 |
} |
923 |
|
924 |
static int all_vcpus_paused(void) |
925 |
{ |
926 |
CPUArchState *penv = first_cpu; |
927 |
|
928 |
while (penv) {
|
929 |
CPUState *pcpu = ENV_GET_CPU(penv); |
930 |
if (!pcpu->stopped) {
|
931 |
return 0; |
932 |
} |
933 |
penv = penv->next_cpu; |
934 |
} |
935 |
|
936 |
return 1; |
937 |
} |
938 |
|
939 |
void pause_all_vcpus(void) |
940 |
{ |
941 |
CPUArchState *penv = first_cpu; |
942 |
|
943 |
qemu_clock_enable(vm_clock, false);
|
944 |
while (penv) {
|
945 |
CPUState *pcpu = ENV_GET_CPU(penv); |
946 |
pcpu->stop = true;
|
947 |
qemu_cpu_kick(pcpu); |
948 |
penv = penv->next_cpu; |
949 |
} |
950 |
|
951 |
if (qemu_in_vcpu_thread()) {
|
952 |
cpu_stop_current(); |
953 |
if (!kvm_enabled()) {
|
954 |
while (penv) {
|
955 |
CPUState *pcpu = ENV_GET_CPU(penv); |
956 |
pcpu->stop = 0;
|
957 |
pcpu->stopped = true;
|
958 |
penv = penv->next_cpu; |
959 |
} |
960 |
return;
|
961 |
} |
962 |
} |
963 |
|
964 |
while (!all_vcpus_paused()) {
|
965 |
qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); |
966 |
penv = first_cpu; |
967 |
while (penv) {
|
968 |
qemu_cpu_kick(ENV_GET_CPU(penv)); |
969 |
penv = penv->next_cpu; |
970 |
} |
971 |
} |
972 |
} |
973 |
|
974 |
void resume_all_vcpus(void) |
975 |
{ |
976 |
CPUArchState *penv = first_cpu; |
977 |
|
978 |
qemu_clock_enable(vm_clock, true);
|
979 |
while (penv) {
|
980 |
CPUState *pcpu = ENV_GET_CPU(penv); |
981 |
pcpu->stop = false;
|
982 |
pcpu->stopped = false;
|
983 |
qemu_cpu_kick(pcpu); |
984 |
penv = penv->next_cpu; |
985 |
} |
986 |
} |
987 |
|
988 |
static void qemu_tcg_init_vcpu(CPUState *cpu) |
989 |
{ |
990 |
/* share a single thread for all cpus with TCG */
|
991 |
if (!tcg_cpu_thread) {
|
992 |
cpu->thread = g_malloc0(sizeof(QemuThread));
|
993 |
cpu->halt_cond = g_malloc0(sizeof(QemuCond));
|
994 |
qemu_cond_init(cpu->halt_cond); |
995 |
tcg_halt_cond = cpu->halt_cond; |
996 |
qemu_thread_create(cpu->thread, qemu_tcg_cpu_thread_fn, cpu, |
997 |
QEMU_THREAD_JOINABLE); |
998 |
#ifdef _WIN32
|
999 |
cpu->hThread = qemu_thread_get_handle(cpu->thread); |
1000 |
#endif
|
1001 |
while (!cpu->created) {
|
1002 |
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); |
1003 |
} |
1004 |
tcg_cpu_thread = cpu->thread; |
1005 |
} else {
|
1006 |
cpu->thread = tcg_cpu_thread; |
1007 |
cpu->halt_cond = tcg_halt_cond; |
1008 |
} |
1009 |
} |
1010 |
|
1011 |
static void qemu_kvm_start_vcpu(CPUArchState *env) |
1012 |
{ |
1013 |
CPUState *cpu = ENV_GET_CPU(env); |
1014 |
|
1015 |
cpu->thread = g_malloc0(sizeof(QemuThread));
|
1016 |
cpu->halt_cond = g_malloc0(sizeof(QemuCond));
|
1017 |
qemu_cond_init(cpu->halt_cond); |
1018 |
qemu_thread_create(cpu->thread, qemu_kvm_cpu_thread_fn, env, |
1019 |
QEMU_THREAD_JOINABLE); |
1020 |
while (!cpu->created) {
|
1021 |
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); |
1022 |
} |
1023 |
} |
1024 |
|
1025 |
static void qemu_dummy_start_vcpu(CPUArchState *env) |
1026 |
{ |
1027 |
CPUState *cpu = ENV_GET_CPU(env); |
1028 |
|
1029 |
cpu->thread = g_malloc0(sizeof(QemuThread));
|
1030 |
cpu->halt_cond = g_malloc0(sizeof(QemuCond));
|
1031 |
qemu_cond_init(cpu->halt_cond); |
1032 |
qemu_thread_create(cpu->thread, qemu_dummy_cpu_thread_fn, env, |
1033 |
QEMU_THREAD_JOINABLE); |
1034 |
while (!cpu->created) {
|
1035 |
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); |
1036 |
} |
1037 |
} |
1038 |
|
1039 |
void qemu_init_vcpu(void *_env) |
1040 |
{ |
1041 |
CPUArchState *env = _env; |
1042 |
CPUState *cpu = ENV_GET_CPU(env); |
1043 |
|
1044 |
env->nr_cores = smp_cores; |
1045 |
env->nr_threads = smp_threads; |
1046 |
cpu->stopped = true;
|
1047 |
if (kvm_enabled()) {
|
1048 |
qemu_kvm_start_vcpu(env); |
1049 |
} else if (tcg_enabled()) { |
1050 |
qemu_tcg_init_vcpu(cpu); |
1051 |
} else {
|
1052 |
qemu_dummy_start_vcpu(env); |
1053 |
} |
1054 |
} |
1055 |
|
1056 |
void cpu_stop_current(void) |
1057 |
{ |
1058 |
if (cpu_single_env) {
|
1059 |
CPUState *cpu_single_cpu = ENV_GET_CPU(cpu_single_env); |
1060 |
cpu_single_cpu->stop = false;
|
1061 |
cpu_single_cpu->stopped = true;
|
1062 |
cpu_exit(cpu_single_env); |
1063 |
qemu_cond_signal(&qemu_pause_cond); |
1064 |
} |
1065 |
} |
1066 |
|
1067 |
void vm_stop(RunState state)
|
1068 |
{ |
1069 |
if (qemu_in_vcpu_thread()) {
|
1070 |
qemu_system_vmstop_request(state); |
1071 |
/*
|
1072 |
* FIXME: should not return to device code in case
|
1073 |
* vm_stop() has been requested.
|
1074 |
*/
|
1075 |
cpu_stop_current(); |
1076 |
return;
|
1077 |
} |
1078 |
do_vm_stop(state); |
1079 |
} |
1080 |
|
1081 |
/* does a state transition even if the VM is already stopped,
|
1082 |
current state is forgotten forever */
|
1083 |
void vm_stop_force_state(RunState state)
|
1084 |
{ |
1085 |
if (runstate_is_running()) {
|
1086 |
vm_stop(state); |
1087 |
} else {
|
1088 |
runstate_set(state); |
1089 |
} |
1090 |
} |
1091 |
|
1092 |
static int tcg_cpu_exec(CPUArchState *env) |
1093 |
{ |
1094 |
int ret;
|
1095 |
#ifdef CONFIG_PROFILER
|
1096 |
int64_t ti; |
1097 |
#endif
|
1098 |
|
1099 |
#ifdef CONFIG_PROFILER
|
1100 |
ti = profile_getclock(); |
1101 |
#endif
|
1102 |
if (use_icount) {
|
1103 |
int64_t count; |
1104 |
int decr;
|
1105 |
qemu_icount -= (env->icount_decr.u16.low + env->icount_extra); |
1106 |
env->icount_decr.u16.low = 0;
|
1107 |
env->icount_extra = 0;
|
1108 |
count = qemu_icount_round(qemu_clock_deadline(vm_clock)); |
1109 |
qemu_icount += count; |
1110 |
decr = (count > 0xffff) ? 0xffff : count; |
1111 |
count -= decr; |
1112 |
env->icount_decr.u16.low = decr; |
1113 |
env->icount_extra = count; |
1114 |
} |
1115 |
ret = cpu_exec(env); |
1116 |
#ifdef CONFIG_PROFILER
|
1117 |
qemu_time += profile_getclock() - ti; |
1118 |
#endif
|
1119 |
if (use_icount) {
|
1120 |
/* Fold pending instructions back into the
|
1121 |
instruction counter, and clear the interrupt flag. */
|
1122 |
qemu_icount -= (env->icount_decr.u16.low |
1123 |
+ env->icount_extra); |
1124 |
env->icount_decr.u32 = 0;
|
1125 |
env->icount_extra = 0;
|
1126 |
} |
1127 |
return ret;
|
1128 |
} |
1129 |
|
1130 |
static void tcg_exec_all(void) |
1131 |
{ |
1132 |
int r;
|
1133 |
|
1134 |
/* Account partial waits to the vm_clock. */
|
1135 |
qemu_clock_warp(vm_clock); |
1136 |
|
1137 |
if (next_cpu == NULL) { |
1138 |
next_cpu = first_cpu; |
1139 |
} |
1140 |
for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) { |
1141 |
CPUArchState *env = next_cpu; |
1142 |
CPUState *cpu = ENV_GET_CPU(env); |
1143 |
|
1144 |
qemu_clock_enable(vm_clock, |
1145 |
(env->singlestep_enabled & SSTEP_NOTIMER) == 0);
|
1146 |
|
1147 |
if (cpu_can_run(cpu)) {
|
1148 |
r = tcg_cpu_exec(env); |
1149 |
if (r == EXCP_DEBUG) {
|
1150 |
cpu_handle_guest_debug(env); |
1151 |
break;
|
1152 |
} |
1153 |
} else if (cpu->stop || cpu->stopped) { |
1154 |
break;
|
1155 |
} |
1156 |
} |
1157 |
exit_request = 0;
|
1158 |
} |
1159 |
|
1160 |
void set_numa_modes(void) |
1161 |
{ |
1162 |
CPUArchState *env; |
1163 |
int i;
|
1164 |
|
1165 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1166 |
for (i = 0; i < nb_numa_nodes; i++) { |
1167 |
if (test_bit(env->cpu_index, node_cpumask[i])) {
|
1168 |
env->numa_node = i; |
1169 |
} |
1170 |
} |
1171 |
} |
1172 |
} |
1173 |
|
1174 |
void set_cpu_log(const char *optarg) |
1175 |
{ |
1176 |
int mask;
|
1177 |
const CPULogItem *item;
|
1178 |
|
1179 |
mask = cpu_str_to_log_mask(optarg); |
1180 |
if (!mask) {
|
1181 |
printf("Log items (comma separated):\n");
|
1182 |
for (item = cpu_log_items; item->mask != 0; item++) { |
1183 |
printf("%-10s %s\n", item->name, item->help);
|
1184 |
} |
1185 |
exit(1);
|
1186 |
} |
1187 |
cpu_set_log(mask); |
1188 |
} |
1189 |
|
1190 |
void set_cpu_log_filename(const char *optarg) |
1191 |
{ |
1192 |
cpu_set_log_filename(optarg); |
1193 |
} |
1194 |
|
1195 |
void list_cpus(FILE *f, fprintf_function cpu_fprintf, const char *optarg) |
1196 |
{ |
1197 |
/* XXX: implement xxx_cpu_list for targets that still miss it */
|
1198 |
#if defined(cpu_list)
|
1199 |
cpu_list(f, cpu_fprintf); |
1200 |
#endif
|
1201 |
} |
1202 |
|
1203 |
CpuInfoList *qmp_query_cpus(Error **errp) |
1204 |
{ |
1205 |
CpuInfoList *head = NULL, *cur_item = NULL; |
1206 |
CPUArchState *env; |
1207 |
|
1208 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1209 |
CPUState *cpu = ENV_GET_CPU(env); |
1210 |
CpuInfoList *info; |
1211 |
|
1212 |
cpu_synchronize_state(env); |
1213 |
|
1214 |
info = g_malloc0(sizeof(*info));
|
1215 |
info->value = g_malloc0(sizeof(*info->value));
|
1216 |
info->value->CPU = env->cpu_index; |
1217 |
info->value->current = (env == first_cpu); |
1218 |
info->value->halted = env->halted; |
1219 |
info->value->thread_id = cpu->thread_id; |
1220 |
#if defined(TARGET_I386)
|
1221 |
info->value->has_pc = true;
|
1222 |
info->value->pc = env->eip + env->segs[R_CS].base; |
1223 |
#elif defined(TARGET_PPC)
|
1224 |
info->value->has_nip = true;
|
1225 |
info->value->nip = env->nip; |
1226 |
#elif defined(TARGET_SPARC)
|
1227 |
info->value->has_pc = true;
|
1228 |
info->value->pc = env->pc; |
1229 |
info->value->has_npc = true;
|
1230 |
info->value->npc = env->npc; |
1231 |
#elif defined(TARGET_MIPS)
|
1232 |
info->value->has_PC = true;
|
1233 |
info->value->PC = env->active_tc.PC; |
1234 |
#endif
|
1235 |
|
1236 |
/* XXX: waiting for the qapi to support GSList */
|
1237 |
if (!cur_item) {
|
1238 |
head = cur_item = info; |
1239 |
} else {
|
1240 |
cur_item->next = info; |
1241 |
cur_item = info; |
1242 |
} |
1243 |
} |
1244 |
|
1245 |
return head;
|
1246 |
} |
1247 |
|
1248 |
void qmp_memsave(int64_t addr, int64_t size, const char *filename, |
1249 |
bool has_cpu, int64_t cpu_index, Error **errp)
|
1250 |
{ |
1251 |
FILE *f; |
1252 |
uint32_t l; |
1253 |
CPUArchState *env; |
1254 |
uint8_t buf[1024];
|
1255 |
|
1256 |
if (!has_cpu) {
|
1257 |
cpu_index = 0;
|
1258 |
} |
1259 |
|
1260 |
for (env = first_cpu; env; env = env->next_cpu) {
|
1261 |
if (cpu_index == env->cpu_index) {
|
1262 |
break;
|
1263 |
} |
1264 |
} |
1265 |
|
1266 |
if (env == NULL) { |
1267 |
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cpu-index",
|
1268 |
"a CPU number");
|
1269 |
return;
|
1270 |
} |
1271 |
|
1272 |
f = fopen(filename, "wb");
|
1273 |
if (!f) {
|
1274 |
error_set(errp, QERR_OPEN_FILE_FAILED, filename); |
1275 |
return;
|
1276 |
} |
1277 |
|
1278 |
while (size != 0) { |
1279 |
l = sizeof(buf);
|
1280 |
if (l > size)
|
1281 |
l = size; |
1282 |
cpu_memory_rw_debug(env, addr, buf, l, 0);
|
1283 |
if (fwrite(buf, 1, l, f) != l) { |
1284 |
error_set(errp, QERR_IO_ERROR); |
1285 |
goto exit;
|
1286 |
} |
1287 |
addr += l; |
1288 |
size -= l; |
1289 |
} |
1290 |
|
1291 |
exit:
|
1292 |
fclose(f); |
1293 |
} |
1294 |
|
1295 |
void qmp_pmemsave(int64_t addr, int64_t size, const char *filename, |
1296 |
Error **errp) |
1297 |
{ |
1298 |
FILE *f; |
1299 |
uint32_t l; |
1300 |
uint8_t buf[1024];
|
1301 |
|
1302 |
f = fopen(filename, "wb");
|
1303 |
if (!f) {
|
1304 |
error_set(errp, QERR_OPEN_FILE_FAILED, filename); |
1305 |
return;
|
1306 |
} |
1307 |
|
1308 |
while (size != 0) { |
1309 |
l = sizeof(buf);
|
1310 |
if (l > size)
|
1311 |
l = size; |
1312 |
cpu_physical_memory_rw(addr, buf, l, 0);
|
1313 |
if (fwrite(buf, 1, l, f) != l) { |
1314 |
error_set(errp, QERR_IO_ERROR); |
1315 |
goto exit;
|
1316 |
} |
1317 |
addr += l; |
1318 |
size -= l; |
1319 |
} |
1320 |
|
1321 |
exit:
|
1322 |
fclose(f); |
1323 |
} |
1324 |
|
1325 |
void qmp_inject_nmi(Error **errp)
|
1326 |
{ |
1327 |
#if defined(TARGET_I386)
|
1328 |
CPUArchState *env; |
1329 |
|
1330 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1331 |
if (!env->apic_state) {
|
1332 |
cpu_interrupt(env, CPU_INTERRUPT_NMI); |
1333 |
} else {
|
1334 |
apic_deliver_nmi(env->apic_state); |
1335 |
} |
1336 |
} |
1337 |
#else
|
1338 |
error_set(errp, QERR_UNSUPPORTED); |
1339 |
#endif
|
1340 |
} |