Re: [Qemu-devel] Qemu deadlocks in tb_lock when using SVM+SoftMMU

[Paolo Bonzini <pbonzini@redhat.com>]

----- Original Message -----
> From: "Alexander Boettcher" <alexander.boettcher@genode-labs.com>
> To: "Alex Bennée" <alex.bennee@linaro.org>
> Cc: qemu-devel@nongnu.org, rth@twiddle.net, "fred konrad" <fred.konrad@greensocs.com>, pbonzini@redhat.com,
> "crosthwaite peter" <crosthwaite.peter@gmail.com>
> Sent: Monday, March 6, 2017 9:11:04 PM
> Subject: Re: Qemu deadlocks in tb_lock when using SVM+SoftMMU
> 
> Hello,
> 
> thank you for your effort.
> 
> With your patch I get now a 0x3f exception shown by the hypervisor,
> which I have never encountered so far before. The guest kernel seems not
> to start, at least no life sign is shown.
> 
> For me the patch of Paolo Bonzini works reliable.

Let's use mine then. :)  I'll post it properly tomorrow.

Paolo

> How to proceed ?
> 
> Thanks,
> 
> Alex.
> 
> On 06.03.2017 17:24, Alex Bennée wrote:
> > 
> > Alexander Boettcher <alexander.boettcher@genode-labs.com> writes:
> > 
> >> Hi,
> > <snip>
> >>
> >> Sometimes Qemu just succeeds if the timing is well, will see.
> >>
> >> But this is not the point of this issue atm.
> > 
> > I've sent a patch that works as Richard suggested. However your test
> > image seems to run into other issues. I have tested it on my known good
> > x86 image and it works.
> > 
> > However my knowledge of x86's interrupt architecture is fairly minimal
> > so I'm looking for testing/feedback on the patch.
> > 
> >>
> >> Alex.
> > 
> > 
> > --
> > Alex Bennée
> > 
> 
> --
> Alexander Boettcher
> Genode Labs
> 
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