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

[Alexander Boettcher]

Hi,

On 06.03.2017 14:15, Alex Bennée wrote:
> I found the virtualbox.iso on your branch but I can't trigger the
> assert. Running:
> 
> #!/bin/sh
> 
> QEMU="$@"
> 
> ${QEMU} -s -no-kvm -display sdl -m 512 -cpu phenom -nographic -cdrom 
> virtualbox.iso
> 
> I get:
> 
> NOVA Microhypervisor v7-2436fe2 (x86_32): Feb 25 2017 17:58:48 [gcc 4.9.2]
> [init -> log_terminal]
> [init -> log_terminal] [ 0] CORE:0:0:0 10:2:3:0 [0] AMD Phenom(tm) 9550 
> Quad-Core Processor
> qemu: fatal: invalid tss type


> Which is a guest error?

It's a race which happens in Qemu (not on hardware), so I still
investigating it within Qemu. Because of that on [0] the commit before
the virtualbox.iso is one commit to avoid this for the moment in order
to continue.

>> [0] https://github.com/alex-ab/qemu/commits/genode_svm_issue

Alex.

-- 
Alexander Boettcher
Genode Labs

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