Am 15.02.2013 18:04, schrieb Alexander Graf:
>
> On 15.02.2013, at 17:58, Andreas Färber wrote:
>
>> Am 15.02.2013 17:54, schrieb Alexander Graf:
>>>
>>> On 15.02.2013, at 17:51, Andreas Färber wrote:
>>>
>>>> Potentially env could be NULL whereas cpu would still be valid and
>>>> correspond to a previous env.
>>>>
>>>> Wrapping this in qemu_get_cpu(), env is no longer needed, so simplify
>>>> code that existed before 55e5c2850293547203874098f7cec148ffd12dfa.
>>>>
>>>> Signed-off-by: Andreas Färber <afaer...@suse.de>
>>>> ---
>>>> hw/ppce500_spin.c | 15 ++++-----------
>>>> 1 Datei geändert, 4 Zeilen hinzugefügt(+), 11 Zeilen entfernt(-)
>>>>
>>>> diff --git a/hw/ppce500_spin.c b/hw/ppce500_spin.c
>>>> index 7e90fb9..5bdce52 100644
>>>> --- a/hw/ppce500_spin.c
>>>> +++ b/hw/ppce500_spin.c
>>>> @@ -123,18 +123,11 @@ static void spin_write(void *opaque, hwaddr addr,
>>>> uint64_t value,
>>>> {
>>>> SpinState *s = opaque;
>>>> int env_idx = addr / sizeof(SpinInfo);
>>>> - CPUPPCState *env;
>>>> - CPUState *cpu = NULL;
>>>> + CPUState *cpu;
>>>> SpinInfo *curspin = &s->spin[env_idx];
>>>> uint8_t *curspin_p = (uint8_t*)curspin;
>>>>
>>>> - for (env = first_cpu; env != NULL; env = env->next_cpu) {
>>>> - cpu = CPU(ppc_env_get_cpu(env));
>>>> - if (cpu->cpu_index == env_idx) {
>>>> - break;
>>>> - }
>>>> - }
>>>> -
>>>> + cpu = qemu_get_cpu(env_idx);
>>>> if (cpu == NULL) {
>>>> /* Unknown CPU */
>>>> return;
>>>> @@ -161,11 +154,11 @@ static void spin_write(void *opaque, hwaddr addr,
>>>> uint64_t value,
>>>> if (!(ldq_p(&curspin->addr) & 1)) {
>>>> /* run CPU */
>>>> SpinKick kick = {
>>>> - .cpu = ppc_env_get_cpu(env),
>>>> + .cpu = POWERPC_CPU(cpu),
>>>
>>> Why not just cpu?
>>
>> PowerPCCPU vs. CPUState type.
>> Having the specific type in ppc code allows direct access to ->env.
>>
>> If you see a performance issue, we could also use (PowerPCCPU *)cpu.
>
> There are no performance issues in the spin code :). By definition. This
> thing could be written in bash and still be fast enough.
>
> I was mostly wondering whether ppc_env_get_cpu(env) returns a PowerPCCPU *.
> But apparently it does. Ok then :)
>
>
> Acked-by: Alexander Graf <ag...@suse.de>
Thanks, applied to qom-cpu-next:
https://github.com/afaerber/qemu-cpu/commits/qom-cpu-next
/-F
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