[libvirt] [PATCH] qemu: Starting a domain with custom model and allowed-fallback failed when host lacks some CPU features
An attemp to start a domain requesting a custom CPU model, core2duo, for
example, will fail if some feature that the model needs doesn't exist in that
host, even though fallback attibute is set allow:
"error: the CPU is incompatible with host CPU: Host CPU does not provide
required features: monitor"
Of course we can start that domain through forbidding that feature, but
that may not be flexible.
Signed-off-by: Yi Wang <wang.yi59(a)zte.com.cn>
---
src/qemu/qemu_process.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 32ba8e3..1bb65d3 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -5324,7 +5324,8 @@ qemuProcessUpdateGuestCPU(virDomainDefPtr def,
virCPUCompare(caps->host.arch,
virQEMUCapsGetHostModel(qemuCaps, def->virtType,
VIR_QEMU_CAPS_HOST_CPU_FULL),
- def->cpu, true) < 0)
+ def->cpu,
+ def->cpu->fallback != VIR_CPU_FALLBACK_ALLOW) < 0)
return -1;
if (virCPUUpdate(def->os.arch, def->cpu,
--
1.8.3.1