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s390x/cpumodel: "host" and "qemu" as CPU subclasses

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This patch introduces two CPU models, "host" and "qemu".
"qemu" is used as default when running under TCG. "host" is used
as default when running under KVM. "host" cannot be used without KVM.
"host" is not migration-safe. They both inherit from the base s390x CPU,
which is turned into an abstract class.

This patch also changes CPU creation to take care of the passed CPU string
and reuses common code parse_features() function for that purpose. Unknown
CPU definitions are now reported. The "-cpu ?" and "query-cpu-definition"
commands are changed to list all CPU subclasses automatically, including
migration-safety and whether static.

Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Message-Id: <20160905085244.99980-3-dahi@linux.vnet.ibm.com>
[CH: fix up self-assignments in s390_cpu_list, as spotted by clang]
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
David Hildenbrand 2016-09-05 10:52:16 +02:00 • committed by Cornelia Huck
parent fc4b84b1c6
commit 41868f846d
7 changed files with 229 additions and 28 deletions
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6
hw/s390x/s390-virtio.c
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@ -101,7 +101,11 @@ void s390_init_cpus(MachineState *machine)
gchar *name;
if (machine->cpu_model == NULL) {
machine->cpu_model = "host";
if (kvm_enabled()) {
machine->cpu_model = "host";
} else {
machine->cpu_model = "qemu";
}
}
cpu_states = g_new0(S390CPU *, max_cpus);