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icount: put icount variables into TimerState. 

This puts qemu_icount and qemu_icount_bias into TimerState structure to allow
them to be migrated.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
KONRAD Frederic 2014-08-01 01:37:09 +02:00 committed by Paolo Bonzini
parent 5692399f0a
commit c96778bb84
1 changed files with 16 additions and 13 deletions
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29
cpus.c
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@ -102,17 +102,12 @@ static bool all_cpu_threads_idle(void)
/* Protected by TimersState seqlock */
/* Compensate for varying guest execution speed. */
static int64_t qemu_icount_bias;
static int64_t vm_clock_warp_start;
/* 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;
@ -129,6 +124,11 @@ typedef struct TimersState {
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;
@ -139,14 +139,14 @@ static int64_t cpu_get_icount_locked(void)
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 + (icount << icount_time_shift);
}
int64_t cpu_get_icount(void)
@ -284,7 +284,8 @@ static void icount_adjust(void)
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);
}
@ -333,7 +334,7 @@ static void icount_warp_rt(void *opaque)
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);
@ -351,7 +352,7 @@ void qtest_clock_warp(int64_t dest)
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);
@ -1250,7 +1251,8 @@ static int tcg_cpu_exec(CPUArchState *env)
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);
@ -1265,7 +1267,7 @@ static int tcg_cpu_exec(CPUArchState *env)
}
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;
@ -1278,7 +1280,8 @@ static int tcg_cpu_exec(CPUArchState *env)
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;
}