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cpu: introduce cpu_in_exclusive_context()

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Suggested-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: moved inside start/end_exclusive fns + cleanup]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Emilio G. Cota
2018-11-26 17:14:43 -05:00
committed by Alex Bennée
parent 504f73f7b3
commit cfbc3c6083
3 changed files with 18 additions and 4 deletions
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4
cpus-common.c
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@@ -200,11 +200,15 @@ void start_exclusive(void)
* section until end_exclusive resets pending_cpus to 0.
*/
qemu_mutex_unlock(&qemu_cpu_list_lock);
current_cpu->in_exclusive_context = true;
}
/* Finish an exclusive operation. */
void end_exclusive(void)
{
current_cpu->in_exclusive_context = false;
qemu_mutex_lock(&qemu_cpu_list_lock);
atomic_set(&pending_cpus, 0);
qemu_cond_broadcast(&exclusive_resume);