Hello all, As noted before, going back to 2020.11-2+deb11u1 allows booting HVM domains. However, for us it slowed down the boot from half a minute to two minutes, when using PCI passthrough. The Xen community pointed out to me that this may be due to a patch for Xen not being built in that version (https://github.com/tianocore/edk2/commit/c05de360ec614f71716a201760b91ee055a5ff28).
I propose to either - ship a Xen specific version of OVMF (as suggested here https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978595 and above and similar to Fedora https://packages.fedoraproject.org/pkgs/edk2/edk2-ovmf-xen/) or - build Xen with OVMF included (the Xen build should supports this). However, I myself could get neither package to compile this way from Debian sources. We mitigated the problem for us, by building OVMF ourselves from git://xenbits.xen.org/ovmf.git for "edk2-stable202305", the latest tag found there. It should actually be the same for https://github.com/tianocore/edk2.git, but I did not try. On Debian 12 to make it work we - removed "brotli" from BaseTools/Source/C/Makefile (otherwise the build will fail with warnings treated as errors) - apt-get build-dep -y ovmf # Build needs GCC 11 instead of version 12 shipped with Debian 12, because otherwise again the build will end with warnings treated as errors - apt-get install -y gcc-11 g++-11 libgcc-11-dev - update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-11 1 - update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-11 1 - cd BaseTools; make -C Source/C - cd ..; OvmfPkg/build.sh -a X64 -b RELEASE -p OvmfPkg/OvmfXen.dsc Then "Build/OvmfXen/RELEASE_GCC5/FV/OVMF.fd" must be placed at "/usr/share/ovmf/OVMF.fd", because the Debian package for Xen is compiled with "--with-system-ovmf=/usr/share/ovmf/OVMF.fd". Best regards, Tobias
