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Date: Mon, 31 Aug 2026 17:24:53 +0200
From: =?utf-8?B?SsO2cmcgUsO2ZGVs?= <joro@8bytes.org>
To: Liam Merwick <liam.merwick@oracle.com>
Cc: coconut-svsm@lists.linux.dev, linux-coco@lists.linux.dev
Subject: Re: SVSM: Updated Linux and QEMU branches available for testing
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 <b1cfe9d8-4f29-42f0-b3ac-312724250d0c@oracle.com>
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In-Reply-To: <b1cfe9d8-4f29-42f0-b3ac-312724250d0c@oracle.com>

Hi Liam,

On Mon, Aug 31, 2026 at 09:41:13AM +0100, Liam Merwick wrote:
> 
> On 27/08/2026 17:17, Jörg Rödel wrote:
> > Hi, I just pushed out new branches for COCONUT-SVSMs downstream Linux
> > and QEMU changes. The new branches need to be used together, as there
> > have been rebases which changed parts of the user-space interface. For
> > Linux the branch is:
> > https: //github. com/coconut-svsm/linux/tree/svsm-v7. 2
> > 
> 
> 
> On a system that was running the 7.1 branches, I've upgraded the host
> kernel and qemu to the 7.2 branches and am now getting CPU stalls in
> the guest (and eventual boot hang).
> 
> I'm using ./scripts/launch_guest.sh (and 2026.08-devel)
> 
> One thing I've noticed with kvm_stat is that the top host functions are
> 
>  Event                                         Total %Total CurAvg/s
>  kvm_set_irq                                 2304824   22.2     2095
>  kvm_ioapic_set_irq                          2304824   22.2     2095
>  kvm_pic_set_irq                             2304768   22.2     2095
>  kvm_exit                                     626814    6.0      159
>  kvm_entry                                    626814    6.0      159
>  kvm_vmgexit_exit                             299778    2.9      105
>  kvm_vmgexit_enter                            299777    2.9      105
>  (...)

Thanks for testing the new branches. Can you please share your exact
launch_guest.sh command line? Also, what type of guest image are you running,
something I can download as well?

-Joerg