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a=8Pt4wtQBsACzOfZlUUUA:9 a=PRpDppDLrCsA:10 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=WmVTiCyuxqgg3mnwYu6p:22 X-Proofpoint-GUID: bK55A-3NS3SlgBsV53A4zEICMyVlt37w X-Proofpoint-ORIG-GUID: bK55A-3NS3SlgBsV53A4zEICMyVlt37w On 01/09/2026 01:58, Liam Merwick wrote: > Hi Jörg, On 31/08/2026 16: 24, Jörg Rödel wrote: > 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 > > Hi Jörg, > > On 31/08/2026 16:24, Jörg Rödel wrote: >> 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 >> >> 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? Another data point. The machine I encountered this issue is a Genoa machine. I did a fresh install on a Turin and another Genoa and those do not reproduce the issue - the latest SVSM branches work on those. On the problematic Genoa, switching back to the 7.1 based kernel/qemu combo works. This machine has been running SNP/SVSM for a while so not a fully clean config - it could have accumulated some setting that is incompatible but I don't see anything yet in /proc/cmdline, etc. Regards, Liam >> > In a svsm repo, at tag v2026.08-devel where I've built svsm with > FW_FILE pointing to the svsm edk2 repo at tag > db97fa0a4b29 ("OvmfPkg/PlatformPei: Initialize > PcdConfidentialComputingGuestAttr early") > [ I tried both DEBUG and RELEASE builds ] and qemu is built from > the svsm-v7.2 branch. > > > ./scripts/launch_guest.sh --qemu > /root/src/coconut/qemu/build/qemu-system-x86_64 -i bin/coconut-qemu.igvm > --image ./resolute-server-cloudimg-amd64.img > > Initially I was using OL9 in the guest but I reproduced it with an > unmodified Ubuntu 26.04 [1] > > Regards, > Liam > > [1] > https://cloud-images.ubuntu.com/resolute/current/resolute-server-cloudimg-amd64.img > >