#include "config-host.h"
#include "monitor/monitor.h"
+#include "qapi/qmp/qerror.h"
#include "sysemu/sysemu.h"
#include "exec/gdbstub.h"
#include "sysemu/dma.h"
#include "qemu/main-loop.h"
#include "qemu/bitmap.h"
#include "qemu/seqlock.h"
+#include "qapi-event.h"
+#include "hw/nmi.h"
#ifndef _WIN32
#include "qemu/compatfd.h"
#endif /* CONFIG_LINUX */
static CPUState *next_cpu;
+int64_t max_delay;
+int64_t max_advance;
bool cpu_is_stopped(CPUState *cpu)
{
/* Protected by TimersState seqlock */
-/* Compensate for varying guest execution speed. */
-static int64_t qemu_icount_bias;
-static int64_t vm_clock_warp_start;
+static int64_t vm_clock_warp_start = -1;
/* Conversion factor from emulated instructions to virtual clock ticks. */
static int icount_time_shift;
/* Arbitrarily pick 1MIPS as the minimum allowable speed. */
#define MAX_ICOUNT_SHIFT 10
-/* Only written by TCG thread */
-static int64_t qemu_icount;
-
static QEMUTimer *icount_rt_timer;
static QEMUTimer *icount_vm_timer;
static QEMUTimer *icount_warp_timer;
int64_t cpu_clock_offset;
int32_t cpu_ticks_enabled;
int64_t dummy;
+
+ /* Compensate for varying guest execution speed. */
+ int64_t qemu_icount_bias;
+ /* Only written by TCG thread */
+ int64_t qemu_icount;
} TimersState;
static TimersState timers_state;
int64_t icount;
CPUState *cpu = current_cpu;
- icount = qemu_icount;
+ icount = timers_state.qemu_icount;
if (cpu) {
if (!cpu_can_do_io(cpu)) {
fprintf(stderr, "Bad clock read\n");
}
icount -= (cpu->icount_decr.u16.low + cpu->icount_extra);
}
- return qemu_icount_bias + (icount << icount_time_shift);
+ return timers_state.qemu_icount_bias + cpu_icount_to_ns(icount);
}
int64_t cpu_get_icount(void)
return icount;
}
+int64_t cpu_icount_to_ns(int64_t icount)
+{
+ return icount << icount_time_shift;
+}
+
/* return the host CPU cycle counter and handle stop/restart */
/* Caller must hold the BQL */
int64_t cpu_get_ticks(void)
return ti;
}
+/* return the offset between the host clock and virtual CPU clock */
+int64_t cpu_get_clock_offset(void)
+{
+ int64_t ti;
+ unsigned start;
+
+ do {
+ start = seqlock_read_begin(&timers_state.vm_clock_seqlock);
+ ti = timers_state.cpu_clock_offset;
+ if (!timers_state.cpu_ticks_enabled) {
+ ti -= get_clock();
+ }
+ } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, start));
+
+ return -ti;
+}
+
/* enable cpu_get_ticks()
* Caller must hold BQL which server as mutex for vm_clock_seqlock.
*/
icount_time_shift++;
}
last_delta = delta;
- qemu_icount_bias = cur_icount - (qemu_icount << icount_time_shift);
+ timers_state.qemu_icount_bias = cur_icount
+ - (timers_state.qemu_icount << icount_time_shift);
seqlock_write_unlock(&timers_state.vm_clock_seqlock);
}
int64_t delta = cur_time - cur_icount;
warp_delta = MIN(warp_delta, delta);
}
- qemu_icount_bias += warp_delta;
+ timers_state.qemu_icount_bias += warp_delta;
}
vm_clock_warp_start = -1;
seqlock_write_unlock(&timers_state.vm_clock_seqlock);
int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL);
int64_t warp = qemu_soonest_timeout(dest - clock, deadline);
seqlock_write_lock(&timers_state.vm_clock_seqlock);
- qemu_icount_bias += warp;
+ timers_state.qemu_icount_bias += warp;
seqlock_write_unlock(&timers_state.vm_clock_seqlock);
qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL);
}
}
+static bool icount_state_needed(void *opaque)
+{
+ return use_icount;
+}
+
+/*
+ * This is a subsection for icount migration.
+ */
+static const VMStateDescription icount_vmstate_timers = {
+ .name = "timer/icount",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_INT64(qemu_icount_bias, TimersState),
+ VMSTATE_INT64(qemu_icount, TimersState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static const VMStateDescription vmstate_timers = {
.name = "timer",
.version_id = 2,
VMSTATE_INT64(dummy, TimersState),
VMSTATE_INT64_V(cpu_clock_offset, TimersState, 2),
VMSTATE_END_OF_LIST()
+ },
+ .subsections = (VMStateSubsection[]) {
+ {
+ .vmsd = &icount_vmstate_timers,
+ .needed = icount_state_needed,
+ }, {
+ /* empty */
+ }
}
};
-void configure_icount(const char *option)
+void configure_icount(QemuOpts *opts, Error **errp)
{
+ const char *option;
+ char *rem_str = NULL;
+
seqlock_init(&timers_state.vm_clock_seqlock, NULL);
vmstate_register(NULL, 0, &vmstate_timers, &timers_state);
+ option = qemu_opt_get(opts, "shift");
if (!option) {
+ if (qemu_opt_get(opts, "align") != NULL) {
+ error_setg(errp, "Please specify shift option when using align");
+ }
return;
}
-
+ icount_align_option = qemu_opt_get_bool(opts, "align", false);
icount_warp_timer = timer_new_ns(QEMU_CLOCK_REALTIME,
icount_warp_rt, NULL);
if (strcmp(option, "auto") != 0) {
- icount_time_shift = strtol(option, NULL, 0);
+ errno = 0;
+ icount_time_shift = strtol(option, &rem_str, 0);
+ if (errno != 0 || *rem_str != '\0' || !strlen(option)) {
+ error_setg(errp, "icount: Invalid shift value");
+ }
use_icount = 1;
return;
+ } else if (icount_align_option) {
+ error_setg(errp, "shift=auto and align=on are incompatible");
}
use_icount = 2;
pause_all_vcpus();
runstate_set(state);
vm_state_notify(0, state);
- monitor_protocol_event(QEVENT_STOP, NULL);
+ qapi_event_send_stop(&error_abort);
}
bdrv_drain_all();
int64_t count;
int64_t deadline;
int decr;
- qemu_icount -= (cpu->icount_decr.u16.low + cpu->icount_extra);
+ timers_state.qemu_icount -= (cpu->icount_decr.u16.low
+ + cpu->icount_extra);
cpu->icount_decr.u16.low = 0;
cpu->icount_extra = 0;
deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL);
}
count = qemu_icount_round(deadline);
- qemu_icount += count;
+ timers_state.qemu_icount += count;
decr = (count > 0xffff) ? 0xffff : count;
count -= decr;
cpu->icount_decr.u16.low = decr;
if (use_icount) {
/* Fold pending instructions back into the
instruction counter, and clear the interrupt flag. */
- qemu_icount -= (cpu->icount_decr.u16.low + cpu->icount_extra);
+ timers_state.qemu_icount -= (cpu->icount_decr.u16.low
+ + cpu->icount_extra);
cpu->icount_decr.u32 = 0;
cpu->icount_extra = 0;
}
#elif defined(TARGET_MIPS)
MIPSCPU *mips_cpu = MIPS_CPU(cpu);
CPUMIPSState *env = &mips_cpu->env;
+#elif defined(TARGET_TRICORE)
+ TriCoreCPU *tricore_cpu = TRICORE_CPU(cpu);
+ CPUTriCoreState *env = &tricore_cpu->env;
#endif
cpu_synchronize_state(cpu);
#elif defined(TARGET_MIPS)
info->value->has_PC = true;
info->value->PC = env->active_tc.PC;
+#elif defined(TARGET_TRICORE)
+ info->value->has_PC = true;
+ info->value->PC = env->PC;
#endif
/* XXX: waiting for the qapi to support GSList */
apic_deliver_nmi(cpu->apic_state);
}
}
-#elif defined(TARGET_S390X)
- CPUState *cs;
- S390CPU *cpu;
-
- CPU_FOREACH(cs) {
- cpu = S390_CPU(cs);
- if (cpu->env.cpu_num == monitor_get_cpu_index()) {
- if (s390_cpu_restart(S390_CPU(cs)) == -1) {
- error_set(errp, QERR_UNSUPPORTED);
- return;
- }
- break;
- }
- }
#else
- error_set(errp, QERR_UNSUPPORTED);
+ nmi_monitor_handle(monitor_get_cpu_index(), errp);
#endif
}
+
+void dump_drift_info(FILE *f, fprintf_function cpu_fprintf)
+{
+ if (!use_icount) {
+ return;
+ }
+
+ cpu_fprintf(f, "Host - Guest clock %"PRIi64" ms\n",
+ (cpu_get_clock() - cpu_get_icount())/SCALE_MS);
+ if (icount_align_option) {
+ cpu_fprintf(f, "Max guest delay %"PRIi64" ms\n", -max_delay/SCALE_MS);
+ cpu_fprintf(f, "Max guest advance %"PRIi64" ms\n", max_advance/SCALE_MS);
+ } else {
+ cpu_fprintf(f, "Max guest delay NA\n");
+ cpu_fprintf(f, "Max guest advance NA\n");
+ }
+}
projects / qemu.git / blobdiff