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cpu: cpu_by_arch_id() helper

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The helper can be used for CPU object lookup using the CPU's
arch-specific ID (the one returned by CPUClass::get_arch_id()).

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
[Yi Wang: Added documentation comments]
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Signed-off-by: Yun Liu <liu.yunh@zte.com.cn>
[ehabkost: extracted cpu_by_arch_id() to a separate patch]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Eduardo Habkost 2017-07-26 15:44:35 -03:00
parent 3beacfb98b
commit 5ce46cb34e
2 changed files with 18 additions and 3 deletions
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10
include/qom/cpu.h
View File

@ -754,6 +754,16 @@ CPUState *qemu_get_cpu(int index);
*/
bool cpu_exists(int64_t id);
/**
* cpu_by_arch_id:
* @id: Guest-exposed CPU ID of the CPU to obtain.
*
* Get a CPU with matching @id.
*
* Returns: The CPU or %NULL if there is no matching CPU.
*/
CPUState *cpu_by_arch_id(int64_t id);
/**
* cpu_throttle_set:
* @new_throttle_pct: Percent of sleep time. Valid range is 1 to 99.

11
qom/cpu.c
View File

@ -34,7 +34,7 @@
CPUInterruptHandler cpu_interrupt_handler;
bool cpu_exists(int64_t id)
CPUState *cpu_by_arch_id(int64_t id)
{
CPUState *cpu;
@ -42,10 +42,15 @@ bool cpu_exists(int64_t id)
CPUClass *cc = CPU_GET_CLASS(cpu);
if (cc->get_arch_id(cpu) == id) {
return true;
return cpu;
}
}
return false;
return NULL;
}
bool cpu_exists(int64_t id)
{
return !!cpu_by_arch_id(id);
}
CPUState *cpu_generic_init(const char *typename, const char *cpu_model)