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Re: [Qemu-devel] [PATCH 3/5] target-i386: call x86_cpu_realize() after A
Re: [Qemu-devel] [PATCH 3/5] target-i386: call x86_cpu_realize() after APIC is initialized.
Thu, 21 Jun 2012 12:14:35 +0200
Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120421 Thunderbird/12.0
Am 21.06.2012 11:43, schrieb Igor Mammedov:
> On 06/20/2012 03:35 PM, Andreas Färber wrote:
>> Am 20.06.2012 14:59, schrieb Igor Mammedov:
>>> It's not correct to make CPU runnable (i.e. calling x86_cpu_realize())
>>> when not all properties are set (APIC in this case).
>>> Fix it by calling x86_cpu_realize() at board level after APIC is
>>> initialized, right before cpu_reset().
>>> Signed-off-by: Igor Mammedov <address@hidden>
>>> hw/pc.c | 1 +
>>> target-i386/helper.c | 2 --
>>> 2 files changed, 1 insertion(+), 2 deletions(-)
>>> diff --git a/hw/pc.c b/hw/pc.c
>>> index 8368701..8a662cf 100644
>>> --- a/hw/pc.c
>>> +++ b/hw/pc.c
>>> @@ -948,6 +948,7 @@ static X86CPU *pc_new_cpu(const char *cpu_model)
>>> env->apic_state = apic_init(env, env->cpuid_apic_id);
>>> qemu_register_reset(pc_cpu_reset, cpu);
>>> + x86_cpu_realize(OBJECT(cpu), NULL);
>>> return cpu;
>>> diff --git a/target-i386/helper.c b/target-i386/helper.c
>>> index c52ec13..b38ea7f 100644
>>> --- a/target-i386/helper.c
>>> +++ b/target-i386/helper.c
>>> @@ -1161,8 +1161,6 @@ X86CPU *cpu_x86_init(const char *cpu_model)
>>> return NULL;
>>> - x86_cpu_realize(OBJECT(cpu), NULL);
>>> return cpu;
>> This will require changes in linux-user and possibly bsd-user. Having a
> Why it would require changes in linux-user? So far x86_cpu_realize() does
> nothing useful in linux-user, compiled and tested. It should be harmless
> for linux-user not to execute it.
Hm, I'd need to recheck...
> But I haven't compiled/tested bsd-user, do I need BSD for this?
Yes, you do. But if it's not needed for linux-user then it shouldn't be
needed for bsd-user either.
>> cpu_realize() would probably help with avoiding #ifdef'ery.
>> Unfortunately deriving CPUState from DeviceState proves a bit difficult
>> in the meantime (it worked at one point, now there's lots of circular
>> header dependencies), and realize support for Object got stopped.
> I'm in process of untangling this header mayhem (at least to a point
> that allows compilation complete when CPU is derived from Device)
So am I... A few weeks ago my qom-cpu-dev branch on GitHub used to
compile, now something has changed and I needed to take cpu.h out of
qemu-common.h and move lots of, e.g., ARM devices into libhw to avoid
cpu.h dependencies and add cpu.h includes elsewhere. Would be good to
coordinate that, are you on IRC later today?
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- Re: [Qemu-devel] [PATCH 1/5] target-i386: drop usage of prev_debug_excp_handler, (continued)