From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@redhat.com>
Subject: Re: Qemu process in Guest
Date: Fri, 03 Apr 2009 14:08:25 +0300
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Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
To: "Kumar, Venkat" <Venkat.Kumar@lsi.com>
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Kumar, Venkat wrote:
>
> Thanks for the reply.
>
>  
>
> I had wrong understanding that Qemu runs in Guest.
>
> But now I understand that *ioctl(fd, KVM_RUN, 0);* will tell KVM to 
> load the guest and whenever there is an exception in the guest, KVM 
> traps it and executes the host code post ioctl depending on the reason 
> for exit.
>
>  
>
> Can you point me to the code where the KVM traps the exception and 
> loads the host to execute the post ioctl code?
>

That's what vmx.c and svm.c in the kernel are about, look at 
vmx_vcpu_run() and svm_vcpu_run().

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.