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cpus: prepare new CpusAccel cpu accelerator interface

Browse source 
The new interface starts unused, will start being used by the
next patches.

It provides methods for each accelerator to start a vcpu, kick a vcpu,
synchronize state, get cpu virtual clock and elapsed ticks.

In qemu_wait_io_event, make it clear that APC is used only for HAX
on Windows.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Claudio Fontana 2020-07-31 12:23:42 +02:00 • committed by Paolo Bonzini
parent 8191d36841
commit 430065dab0
11 changed files with 225 additions and 123 deletions
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9
softmmu/cpu-timers.c
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@ -61,18 +61,13 @@ static int64_t cpu_get_ticks_locked(void)
}
/*
* return the time elapsed in VM between vm_start and vm_stop. Unless
* icount is active, cpu_get_ticks() uses units of the host CPU cycle
* counter.
* return the time elapsed in VM between vm_start and vm_stop.
* cpu_get_ticks() uses units of the host CPU cycle counter.
*/
int64_t cpu_get_ticks(void)
{
int64_t ticks;
if (icount_enabled()) {
return icount_get();
}
qemu_spin_lock(&timers_state.vm_clock_lock);
ticks = cpu_get_ticks_locked();
qemu_spin_unlock(&timers_state.vm_clock_lock);