Re: [Xen-devel] [PATCH][SVM] fix guest hang

["Christoph Egger" <Christoph.Egger@xxxxxxx>]

Changeset 16398 is fine with me. Thank you for committing the fix.

Christoph


On Tuesday 20 November 2007 16:08:32 Keir Fraser wrote:
> Good catch. Actually I think it is better to clear interrupt_shadow in
> update_guest_eip. I did this, plus a few other cleanups as c/s 16398 in the
> unstable staging tree. Please take a look and make sure I didn't screw up.
>
>  Thanks,
>  Keir
>
> On 20/11/07 12:56, "Christoph Egger" <Christoph.Egger@xxxxxxx> wrote:
> > Hi Keir!
> >
> > Attached patch fixes a boot hang we have seen with SLES 9.3 and FreeBSD
> > HVM guests. Both are 32bit guests and run with a 64bit hypervisor.
> >
> > The patch does the following:
> > 1) Cache current vcpu in svm_vmexit_do_hlt
> > 2) Check for interrupt shadow in svm_vmexit_do_hlt and handle it like a
> >     pending interrupt
> >
> > The boot hang happens when the hlt is intercepted and the interrupt
> > shadow field in vmcb is set, then the guest waits forever for the next
> > timer interrupt.
> >
> > Change 1) is a cleanup, 2) is the fix
> >
> > Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>



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