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author | Chegu Vinod <chegu_vinod@hp.com> | 2013-06-24 03:49:41 -0600 |
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committer | Juan Quintela <quintela@redhat.com> | 2013-07-12 19:36:01 +0200 |
commit | 3c02270db980007424d797506301826310ce2db4 (patch) | |
tree | 894c91ae01531ca4c15d7bf6093da2288201ceb0 | |
parent | 25ca6a1f5a3ee0a1ae670590877ed14f05e28fba (diff) | |
download | qemu-3c02270db980007424d797506301826310ce2db4.zip qemu-3c02270db980007424d797506301826310ce2db4.tar.gz qemu-3c02270db980007424d797506301826310ce2db4.tar.bz2 |
Introduce async_run_on_cpu()
Introduce an asynchronous version of run_on_cpu() i.e. the caller
doesn't have to block till the call back routine finishes execution
on the target vcpu.
Signed-off-by: Chegu Vinod <chegu_vinod@hp.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
-rw-r--r-- | cpus.c | 29 | ||||
-rw-r--r-- | include/qemu-common.h | 1 | ||||
-rw-r--r-- | include/qom/cpu.h | 10 |
3 files changed, 40 insertions, 0 deletions
@@ -648,6 +648,7 @@ void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data) wi.func = func; wi.data = data; + wi.free = false; if (cpu->queued_work_first == NULL) { cpu->queued_work_first = &wi; } else { @@ -666,6 +667,31 @@ void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data) } } +void async_run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data) +{ + struct qemu_work_item *wi; + + if (qemu_cpu_is_self(cpu)) { + func(data); + return; + } + + wi = g_malloc0(sizeof(struct qemu_work_item)); + wi->func = func; + wi->data = data; + wi->free = true; + if (cpu->queued_work_first == NULL) { + cpu->queued_work_first = wi; + } else { + cpu->queued_work_last->next = wi; + } + cpu->queued_work_last = wi; + wi->next = NULL; + wi->done = false; + + qemu_cpu_kick(cpu); +} + static void flush_queued_work(CPUState *cpu) { struct qemu_work_item *wi; @@ -678,6 +704,9 @@ static void flush_queued_work(CPUState *cpu) cpu->queued_work_first = wi->next; wi->func(wi->data); wi->done = true; + if (wi->free) { + g_free(wi); + } } cpu->queued_work_last = NULL; qemu_cond_broadcast(&qemu_work_cond); diff --git a/include/qemu-common.h b/include/qemu-common.h index f439738..6948bb9 100644 --- a/include/qemu-common.h +++ b/include/qemu-common.h @@ -293,6 +293,7 @@ struct qemu_work_item { void (*func)(void *data); void *data; int done; + bool free; }; diff --git a/include/qom/cpu.h b/include/qom/cpu.h index 147c256..dfd81a1 100644 --- a/include/qom/cpu.h +++ b/include/qom/cpu.h @@ -379,6 +379,16 @@ bool cpu_is_stopped(CPUState *cpu); void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data); /** + * async_run_on_cpu: + * @cpu: The vCPU to run on. + * @func: The function to be executed. + * @data: Data to pass to the function. + * + * Schedules the function @func for execution on the vCPU @cpu asynchronously. + */ +void async_run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data); + +/** * qemu_for_each_cpu: * @func: The function to be executed. * @data: Data to pass to the function. |