On Mon, Jun 08, 2026 at 05:20:59PM +0200, Jörg Rödel wrote: > From: Joerg Roedel <[email protected]> > > Hi, > > here are the required QEMU changes to make use of the KVM Planes > interface posted here[1]. > > The patches are based on QEMU v11.0.0 and can be used to launch an AMD > SEV-SNP VM with COCONUT-SVSM + a Linux guest. > > To make this work a change to the QEMU command line is required to > tell QEMU which plane to target external IRQs to. this is done with > the new device-plane property to the machine specification, e.g: > > $ qemu-system-x86_64 \ > -enable-kvm \ > -cpu EPYC-v4 \ > -machine > q35,confidential-guest-support=sev0,memory-backend=ram1,igvm-cfg=igvm0,kernel-irqchip=split,device-plane=2 > \ > -object memory-backend-memfd,id=ram1,size=32G,share=true \ > -object sev-snp-guest,id=sev0,cbitpos=51,reduced-phys-bits=1 \ > -object igvm-cfg,id=igvm0,file=$IGVM_FILE \ > ...
How are device-plane values intended to be chosen by the user ? Is "2" a value that can/should always be used, or is there a dependency on the igvm file, or somethihng else ? With regards, Daniel -- |: https://berrange.com ~~ https://hachyderm.io/@berrange :| |: https://libvirt.org ~~ https://entangle-photo.org :| |: https://pixelfed.art/berrange ~~ https://fstop138.berrange.com :|
