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Re: [Qemu-devel] kvm: sync registers?
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] kvm: sync registers? |
Date: |
Fri, 07 Nov 2008 16:57:59 +0100 |
User-agent: |
Thunderbird 2.0.0.16 (X11/20080723) |
Anthony Liguori wrote:
> Gerd Hoffmann wrote:
>> Hi,
>>
>> How does kvm sync registers between kernel and qemu env?
>> I see there are kvm_arch_{get,put}_registers() functions in
>> target-i386/kvm.c, but grep doesn't find a single call of them?
>
> Right now, it doesn't.
Ok. No wonder xenner doesn't boot xen pv guest kernels then. kvm
doesn't see the protected-mode start-of-day setup done ...
> We should probably sync registers in the same
> places that kvm-userspace does (gdbstubs, vmport, etc.).
Yep.
> I tried to always sync registers on every exit but this causes boot to
> fail. The same is true of kvm-userspace though and I've been meaning to
> dig into why this is.
Or that. And maybe have a flag indicating qemu changed register state,
i.e. next vmenter must sync too.
cheers,
Gerd