The CPU driver only supports CPU models for PPC64 architecture, not plain PPC. Failed to probe capabilities for /usr/bin/qemu-system-ppc: this function is not supported by the connection driver: 'ppc' architecture is not supported by CPU driver This fixes a bug in commit db873ab3bc5f6fbd7d227727a62ccfee3d1c3e9d Author: Jiri Denemark <jdenemar(a)redhat.com&gt; Date: Thu May 17 17:08:42 2018 +0200 qemu: Adapt to changed ppc64 CPU model names Signed-off-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; --- src/qemu/qemu_capabilities.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 3ce1556fc2..03093fd73b 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -2454,7 +2454,7 @@ virQEMUCapsFetchCPUDefinitions(qemuMonitorPtr mon, /* QEMU 2.11 for Power renamed all CPU models to lower case, we need to * translate them back to libvirt's upper case model names. */ - if (ARCH_IS_PPC(arch)) { + if (ARCH_IS_PPC64(arch)) { VIR_AUTOSTRINGLIST libvirtModels = NULL; char **name; -- 2.21.0