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Re: [Qemu-devel] [PATCH v2] Fix X86 CPU topology in KVM mode

From: Jan Kiszka
Subject: Re: [Qemu-devel] [PATCH v2] Fix X86 CPU topology in KVM mode
Date: Sun, 11 Sep 2011 10:02:10 +0200
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On 2011-09-10 16:37, Bharata B Rao wrote:
> On Fri, Sep 9, 2011 at 10:44 PM, Anthony Liguori <address@hidden> wrote:
>> This breaks the build:
>>  CC    i386-linux-user/helper.o
>> /home/anthony/git/qemu/target-i386/helper.c: In function ‘cpu_x86_init’:
>> /home/anthony/git/qemu/target-i386/helper.c:1260:47: error: ‘smp_cpus’
>> undeclared (first use in this function)
>> /home/anthony/git/qemu/target-i386/helper.c:1260:47: note: each undeclared
>> identifier is reported only once for each function it appears in
>> make[1]: *** [helper.o] Error 1
>> make: *** [subdir-i386-linux-user] Error 2
>> Please do a full build before submitting patches.
> Sorry about this, the complexity of qemu and its capability to
> support/emulate such wide range of targets is slowly sinking in :)
> smp_cpus is defined in vl.c which doesn't even get compiled for
> targets like i386-linux-user and hence we end up in above undefined
> reference error.
> I wouldn't attempt another fix until I spend some time understanding
> the code organization for various targets. Meanwhile since the root
> cause of the probem and the solution are known, if anyone more well
> versed with qemu code organization can fix this, please go ahead.

Just assign cpuid_apic_id unconditionally in cpu_x86_init. Will have no
side effects.


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