Re: Error : virHostCPUGetKVMMaxVCPUs:1228 : KVM is not supported on this platform: Function not implemented.

On Tue, Aug 29, 2023 at 09:22:35PM +0200, Mario Marietto wrote: > Hello. > > I'm running Debian bookworm on my ARM Chromebook,model "xe303c12" and > I've recompiled the kernel (5.4) to enable KVM,so now my system sounds like > this : That's surely not the default kernel that comes with Debian bookworm, as that 5.4 version is many years old. IIUC the standard bookworm kernel will be 6.4 > root@chromarietto:~# virsh domcapabilities --machine virt > --emulatorbin /usr/local/bin/qemu-system-arm > > 2023-08-29 10:17:59.110+0000: 1763: error : virHostCPUGetKVMMaxVCPUs:1228 : > KVM is not supported on this platform: Function not implemented ; > error: failed to get emulator capabilities > error: KVM is not supported on this platform: Function not implemented This shows libvirt was built against a kernel that lacks the kvm.h header file. This is expected for armv7 as support for KVM on 32-bit arm was deleted in the 5.7 kernel. I expect libvirt was built against the kernel headers from Debian's default 6.4 kernel and thus lacks KVM support. Your booting of the old 5.4 kernel doesn't solve this - you would actually need to build libvirt (and QEMU) against this outdated kernel too. With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|