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cpu: Add helper cpu_exists(), to check if CPU with specified id exists 

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Igor Mammedov 2013-04-25 16:05:24 +02:00 committed by Andreas Färber
parent a37677c32b
commit 69e5ff067a
2 changed files with 36 additions and 0 deletions
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10
include/qom/cpu.h
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@ -234,6 +234,16 @@ void qemu_for_each_cpu(void (*func)(CPUState *cpu, void *data), void *data);
*/
CPUState *qemu_get_cpu(int index);
/**
* cpu_exists:
* @id: Guest-exposed CPU ID to lookup.
*
* Search for CPU with specified ID.
*
* Returns: %true - CPU is found, %false - CPU isn't found.
*/
bool cpu_exists(int64_t id);
#ifndef CONFIG_USER_ONLY
typedef void (*CPUInterruptHandler)(CPUState *, int);

26
qom/cpu.c
View File

@ -24,6 +24,32 @@
#include "qemu/notify.h"
#include "sysemu/sysemu.h"
typedef struct CPUExistsArgs {
int64_t id;
bool found;
} CPUExistsArgs;
static void cpu_exist_cb(CPUState *cpu, void *data)
{
CPUClass *klass = CPU_GET_CLASS(cpu);
CPUExistsArgs *arg = data;
if (klass->get_arch_id(cpu) == arg->id) {
arg->found = true;
}
}
bool cpu_exists(int64_t id)
{
CPUExistsArgs data = {
.id = id,
.found = false,
};
qemu_for_each_cpu(cpu_exist_cb, &data);
return data.found;
}
/* CPU hot-plug notifiers */
static NotifierList cpu_added_notifiers =
NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);