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[PATCH] spapr/kvm: Set default cpu model for all machine classes
From: |
David Gibson |
Subject: |
[PATCH] spapr/kvm: Set default cpu model for all machine classes |
Date: |
Wed, 30 Oct 2019 17:32:43 +0100 |
We have to set the default model of all machine classes, not just for the
active one. Otherwise, "query-machines" will indicate the wrong CPU model
("qemu-s390x-cpu" instead of "host-s390x-cpu") as "default-cpu-type".
s390x already fixed this in de60a92e "s390x/kvm: Set default cpu model for
all machine classes". This patch applies a similar fix for the pseries-*
machine types on ppc64.
Doing a
{"execute":"query-machines"}
under KVM now results in
{
"hotpluggable-cpus": true,
"name": "pseries-4.2",
"numa-mem-supported": true,
"default-cpu-type": "host-powerpc64-cpu",
"is-default": true,
"cpu-max": 1024,
"deprecated": false,
"alias": "pseries"
},
{
"hotpluggable-cpus": true,
"name": "pseries-4.1",
"numa-mem-supported": true,
"default-cpu-type": "host-powerpc64-cpu",
"cpu-max": 1024,
"deprecated": false
},
...
Libvirt probes all machines via "-machine none,accel=kvm:tcg" and will
currently see the wrong CPU model under KVM.
Reported-by: Jiři Denemark <address@hidden>
Cc: David Hildenbrand <address@hidden>
Cc: Igor Mammedov <address@hidden>
---
target/ppc/kvm.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 7d2e8969ac..c77f9848ec 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -100,7 +100,7 @@ static bool kvmppc_is_pr(KVMState *ks)
return kvm_vm_check_extension(ks, KVM_CAP_PPC_GET_PVINFO) != 0;
}
-static int kvm_ppc_register_host_cpu_type(MachineState *ms);
+static int kvm_ppc_register_host_cpu_type(void);
static void kvmppc_get_cpu_characteristics(KVMState *s);
static int kvmppc_get_dec_bits(void);
@@ -147,7 +147,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
exit(1);
}
- kvm_ppc_register_host_cpu_type(ms);
+ kvm_ppc_register_host_cpu_type();
return 0;
}
@@ -2534,13 +2534,19 @@ PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void)
return pvr_pcc;
}
-static int kvm_ppc_register_host_cpu_type(MachineState *ms)
+static void pseries_machine_class_fixup(ObjectClass *oc, void *opaque)
+{
+ MachineClass *mc = MACHINE_CLASS(oc);
+
+ mc->default_cpu_type = TYPE_HOST_POWERPC_CPU;
+}
+
+static int kvm_ppc_register_host_cpu_type(void)
{
TypeInfo type_info = {
.name = TYPE_HOST_POWERPC_CPU,
.class_init = kvmppc_host_cpu_class_init,
};
- MachineClass *mc = MACHINE_GET_CLASS(ms);
PowerPCCPUClass *pvr_pcc;
ObjectClass *oc;
DeviceClass *dc;
@@ -2552,10 +2558,9 @@ static int kvm_ppc_register_host_cpu_type(MachineState
*ms)
}
type_info.parent = object_class_get_name(OBJECT_CLASS(pvr_pcc));
type_register(&type_info);
- if (object_dynamic_cast(OBJECT(ms), TYPE_SPAPR_MACHINE)) {
- /* override TCG default cpu type with 'host' cpu model */
- mc->default_cpu_type = TYPE_HOST_POWERPC_CPU;
- }
+ /* override TCG default cpu type with 'host' cpu model */
+ object_class_foreach(pseries_machine_class_fixup, TYPE_SPAPR_MACHINE,
+ false, NULL);
oc = object_class_by_name(type_info.name);
g_assert(oc);
--
2.21.0
- [PATCH] spapr/kvm: Set default cpu model for all machine classes,
David Gibson <=
- Re: [PATCH] spapr/kvm: Set default cpu model for all machine classes, David Hildenbrand, 2019/10/30
- Re: [PATCH] spapr/kvm: Set default cpu model for all machine classes, no-reply, 2019/10/30
- Re: [PATCH] spapr/kvm: Set default cpu model for all machine classes, no-reply, 2019/10/30
- Re: [PATCH] spapr/kvm: Set default cpu model for all machine classes, Greg Kurz, 2019/10/31
- Re: [PATCH] spapr/kvm: Set default cpu model for all machine classes, Peter Maydell, 2019/10/31