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tcg: move tcg_exec_all and helpers above thread fn 

This is a pure mechanical change in preparation for up-coming
re-factoring. Instead of a forward declaration for tcg_exec_all it and
the associated helper functions are moved in front of the call from
qemu_tcg_cpu_thread_fn.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20161027151030.20863-12-alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Alex Bennée 2016-10-27 16:10:08 +01:00 committed by Paolo Bonzini
parent 548ebcaf36
commit 1be7fcb8aa
1 changed files with 99 additions and 101 deletions
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200
cpus.c
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@ -1055,7 +1055,105 @@ static void *qemu_dummy_cpu_thread_fn(void *arg)
#endif
}
static void tcg_exec_all(void);
static int64_t tcg_get_icount_limit(void)
{
int64_t deadline;
if (replay_mode != REPLAY_MODE_PLAY) {
deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL);
/* Maintain prior (possibly buggy) behaviour where if no deadline
* was set (as there is no QEMU_CLOCK_VIRTUAL timer) or it is more than
* INT32_MAX nanoseconds ahead, we still use INT32_MAX
* nanoseconds.
*/
if ((deadline < 0) || (deadline > INT32_MAX)) {
deadline = INT32_MAX;
}
return qemu_icount_round(deadline);
} else {
return replay_get_instructions();
}
}
static int tcg_cpu_exec(CPUState *cpu)
{
int ret;
#ifdef CONFIG_PROFILER
int64_t ti;
#endif
#ifdef CONFIG_PROFILER
ti = profile_getclock();
#endif
if (use_icount) {
int64_t count;
int decr;
timers_state.qemu_icount -= (cpu->icount_decr.u16.low
+ cpu->icount_extra);
cpu->icount_decr.u16.low = 0;
cpu->icount_extra = 0;
count = tcg_get_icount_limit();
timers_state.qemu_icount += count;
decr = (count > 0xffff) ? 0xffff : count;
count -= decr;
cpu->icount_decr.u16.low = decr;
cpu->icount_extra = count;
}
cpu_exec_start(cpu);
ret = cpu_exec(cpu);
cpu_exec_end(cpu);
#ifdef CONFIG_PROFILER
tcg_time += profile_getclock() - ti;
#endif
if (use_icount) {
/* Fold pending instructions back into the
instruction counter, and clear the interrupt flag. */
timers_state.qemu_icount -= (cpu->icount_decr.u16.low
+ cpu->icount_extra);
cpu->icount_decr.u32 = 0;
cpu->icount_extra = 0;
replay_account_executed_instructions();
}
return ret;
}
static void tcg_exec_all(void)
{
int r;
/* Account partial waits to QEMU_CLOCK_VIRTUAL. */
qemu_account_warp_timer();
if (next_cpu == NULL) {
next_cpu = first_cpu;
}
for (; next_cpu != NULL && !exit_request; next_cpu = CPU_NEXT(next_cpu)) {
CPUState *cpu = next_cpu;
qemu_clock_enable(QEMU_CLOCK_VIRTUAL,
(cpu->singlestep_enabled & SSTEP_NOTIMER) == 0);
if (cpu_can_run(cpu)) {
r = tcg_cpu_exec(cpu);
if (r == EXCP_DEBUG) {
cpu_handle_guest_debug(cpu);
break;
} else if (r == EXCP_ATOMIC) {
cpu_exec_step_atomic(cpu);
}
} else if (cpu->stop || cpu->stopped) {
if (cpu->unplug) {
next_cpu = CPU_NEXT(cpu);
}
break;
}
}
/* Pairs with smp_wmb in qemu_cpu_kick. */
atomic_mb_set(&exit_request, 0);
}
static void *qemu_tcg_cpu_thread_fn(void *arg)
{
@ -1412,106 +1510,6 @@ int vm_stop_force_state(RunState state)
}
}
static int64_t tcg_get_icount_limit(void)
{
int64_t deadline;
if (replay_mode != REPLAY_MODE_PLAY) {
deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL);
/* Maintain prior (possibly buggy) behaviour where if no deadline
* was set (as there is no QEMU_CLOCK_VIRTUAL timer) or it is more than
* INT32_MAX nanoseconds ahead, we still use INT32_MAX
* nanoseconds.
*/
if ((deadline < 0) || (deadline > INT32_MAX)) {
deadline = INT32_MAX;
}
return qemu_icount_round(deadline);
} else {
return replay_get_instructions();
}
}
static int tcg_cpu_exec(CPUState *cpu)
{
int ret;
#ifdef CONFIG_PROFILER
int64_t ti;
#endif
#ifdef CONFIG_PROFILER
ti = profile_getclock();
#endif
if (use_icount) {
int64_t count;
int decr;
timers_state.qemu_icount -= (cpu->icount_decr.u16.low
+ cpu->icount_extra);
cpu->icount_decr.u16.low = 0;
cpu->icount_extra = 0;
count = tcg_get_icount_limit();
timers_state.qemu_icount += count;
decr = (count > 0xffff) ? 0xffff : count;
count -= decr;
cpu->icount_decr.u16.low = decr;
cpu->icount_extra = count;
}
cpu_exec_start(cpu);
ret = cpu_exec(cpu);
cpu_exec_end(cpu);
#ifdef CONFIG_PROFILER
tcg_time += profile_getclock() - ti;
#endif
if (use_icount) {
/* Fold pending instructions back into the
instruction counter, and clear the interrupt flag. */
timers_state.qemu_icount -= (cpu->icount_decr.u16.low
+ cpu->icount_extra);
cpu->icount_decr.u32 = 0;
cpu->icount_extra = 0;
replay_account_executed_instructions();
}
return ret;
}
static void tcg_exec_all(void)
{
int r;
/* Account partial waits to QEMU_CLOCK_VIRTUAL. */
qemu_account_warp_timer();
if (next_cpu == NULL) {
next_cpu = first_cpu;
}
for (; next_cpu != NULL && !exit_request; next_cpu = CPU_NEXT(next_cpu)) {
CPUState *cpu = next_cpu;
qemu_clock_enable(QEMU_CLOCK_VIRTUAL,
(cpu->singlestep_enabled & SSTEP_NOTIMER) == 0);
if (cpu_can_run(cpu)) {
r = tcg_cpu_exec(cpu);
if (r == EXCP_DEBUG) {
cpu_handle_guest_debug(cpu);
break;
} else if (r == EXCP_ATOMIC) {
cpu_exec_step_atomic(cpu);
}
} else if (cpu->stop || cpu->stopped) {
if (cpu->unplug) {
next_cpu = CPU_NEXT(cpu);
}
break;
}
}
/* Pairs with smp_wmb in qemu_cpu_kick. */
atomic_mb_set(&exit_request, 0);
}
void list_cpus(FILE *f, fprintf_function cpu_fprintf, const char *optarg)
{
/* XXX: implement xxx_cpu_list for targets that still miss it */