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[libvirt] [PATCH] qemu: tolerate panic device on S390

If a panic device is being defined without a model in a domain
the default value is always overwritten with model ISA. An ISA
bus does not exist on S390 and therefore specifying a panic device
results in an unsupported configuration.
Since the s390 architecture inherently provides a crash detection
capability the panic device should be tolerated in the domain xml.

This patch achieves the toleration by setting the model to the
default value in case the architecture is S390.

Signed-off-by: Boris Fiuczynski <fiuczy linux vnet ibm com>
Reviewed-by: Cornelia Huck <cornelia huck de ibm com>
 src/qemu/qemu_domain.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 9f9fae3..96561c0 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1605,6 +1605,9 @@ qemuDomainDeviceDefPostParse(virDomainDeviceDefPtr dev,
         if (ARCH_IS_PPC64(def->os.arch) &&
             STRPREFIX(def->os.machine, "pseries"))
             dev->data.panic->model = VIR_DOMAIN_PANIC_MODEL_PSERIES;
+        else if (ARCH_IS_S390(def->os.arch))
+            /* since S390 does not support ISA use default for toleration */
+            dev->data.panic->model = VIR_DOMAIN_PANIC_MODEL_DEFAULT;
             dev->data.panic->model = VIR_DOMAIN_PANIC_MODEL_ISA;

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