I just applied the patch (xen.git-c3bd0b83ea5b7c0da6542687436042eeea1e7909.patch) to the xen packages and can confirm that this fixes the problems. The xsave flags are available again and thus the binaries work too.
- Bug#1020787: Ps Ps
- Bug#1020787: linux-image-5.19.0-2-amd64: After... Diederik de Haas
- Bug#1020787: [Pkg-xen-devel] Bug#1020787:... Marek Marczykowski-Górecki
- Bug#1020787: [Pkg-xen-devel] Bug#1020... Ps Ps
- Bug#1020787: [Pkg-xen-devel] Bug#1020... Diederik de Haas
- Bug#1020787: [Pkg-xen-devel] Bug#... Marek Marczykowski-Górecki
- Bug#1020787: linux-image-5.19... Diederik de Haas
- Bug#1020787: Xen: After ... Diederik de Haas
- Bug#1020787: Xen: After ... Diederik de Haas
- Bug#1020787: linux-image... Ps Ps
- Bug#1020787: linux-image... Patrick
- Bug#1020787: Xen: Af... Diederik de Haas
- Bug#1020787: Xen: Af... Hans van Kranenburg
- Bug#1020787: [Pkg-xen-devel] Bug#... Andy Smith
- Bug#1020787: [Pkg-xen-devel] ... Marek Marczykowski-Górecki
- Bug#1020787: linux-image-5.19.0-2-amd64: ... Ps Ps
