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target-ppc: Make host CPU a subclass of the host's CPU model 

This avoids assigning individual class fields and contributors
forgetting to add field assignments in KVM-only code.

ppc_cpu_class_find_by_pvr() requires the CPU model classes to be
registered, so defer host CPU type registration to kvm_arch_init().

Only register the host CPU type if there is a class with matching PVR.
This lets us drop error handling from instance_init.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Andreas Färber 2013-02-23 11:22:12 +00:00 committed by Alexander Graf
parent 987422bc4a
commit 5ba4576b85
2 changed files with 31 additions and 50 deletions
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66
target-ppc/kvm.c
View File

@ -81,6 +81,8 @@ static void kvm_kick_cpu(void *opaque)
qemu_cpu_kick(CPU(cpu));
}
static int kvm_ppc_register_host_cpu_type(void);
int kvm_arch_init(KVMState *s)
{
cap_interrupt_unset = kvm_check_extension(s, KVM_CAP_PPC_UNSET_IRQ);
@ -98,6 +100,8 @@ int kvm_arch_init(KVMState *s)
"VM to stall at times!\n");
}
kvm_ppc_register_host_cpu_type();
return 0;
}
@ -1488,44 +1492,15 @@ static void alter_insns(uint64_t *word, uint64_t flags, bool on)
static void kvmppc_host_cpu_initfn(Object *obj)
{
PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(obj);
assert(kvm_enabled());
if (pcc->pvr != mfpvr()) {
fprintf(stderr, "Your host CPU is unsupported.\n"
"Please choose a supported model instead, see -cpu ?.\n");
exit(1);
}
}
static void kvmppc_host_cpu_class_init(ObjectClass *oc, void *data)
{
PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
uint32_t host_pvr = mfpvr();
PowerPCCPUClass *pvr_pcc;
uint32_t vmx = kvmppc_get_vmx();
uint32_t dfp = kvmppc_get_dfp();
pvr_pcc = ppc_cpu_class_by_pvr(host_pvr);
if (pvr_pcc != NULL) {
pcc->pvr = pvr_pcc->pvr;
pcc->svr = pvr_pcc->svr;
pcc->insns_flags = pvr_pcc->insns_flags;
pcc->insns_flags2 = pvr_pcc->insns_flags2;
pcc->msr_mask = pvr_pcc->msr_mask;
pcc->mmu_model = pvr_pcc->mmu_model;
pcc->excp_model = pvr_pcc->excp_model;
pcc->bus_model = pvr_pcc->bus_model;
pcc->flags = pvr_pcc->flags;
pcc->bfd_mach = pvr_pcc->bfd_mach;
#ifdef TARGET_PPC64
pcc->sps = pvr_pcc->sps;
#endif
pcc->init_proc = pvr_pcc->init_proc;
pcc->check_pow = pvr_pcc->check_pow;
}
/* Now fix up the class with information we can query from the host */
if (vmx != -1) {
@ -1552,6 +1527,25 @@ int kvmppc_fixup_cpu(PowerPCCPU *cpu)
return 0;
}
static int kvm_ppc_register_host_cpu_type(void)
{
TypeInfo type_info = {
.name = TYPE_HOST_POWERPC_CPU,
.instance_init = kvmppc_host_cpu_initfn,
.class_init = kvmppc_host_cpu_class_init,
};
uint32_t host_pvr = mfpvr();
PowerPCCPUClass *pvr_pcc;
pvr_pcc = ppc_cpu_class_by_pvr(host_pvr);
if (pvr_pcc == NULL) {
return -1;
}
type_info.parent = object_class_get_name(OBJECT_CLASS(pvr_pcc));
type_register(&type_info);
return 0;
}
bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
{
@ -1567,17 +1561,3 @@ int kvm_arch_on_sigbus(int code, void *addr)
{
return 1;
}
static const TypeInfo kvm_host_cpu_type_info = {
.name = TYPE_HOST_POWERPC_CPU,
.parent = TYPE_POWERPC_CPU,
.instance_init = kvmppc_host_cpu_initfn,
.class_init = kvmppc_host_cpu_class_init,
};
static void kvm_ppc_register_types(void)
{
type_register_static(&kvm_host_cpu_type_info);
}
type_init(kvm_ppc_register_types)

15
target-ppc/translate_init.c
View File

@ -8298,13 +8298,6 @@ static ObjectClass *ppc_cpu_class_by_name(const char *name)
const char *p;
int i, len;
if (strcasecmp(name, "host") == 0) {
if (kvm_enabled()) {
ret = object_class_by_name(TYPE_HOST_POWERPC_CPU);
}
return ret;
}
/* Check if the given name is a PVR */
len = strlen(name);
if (len == 10 && name[0] == '0' && name[1] == 'x') {
@ -8405,6 +8398,9 @@ static void ppc_cpu_list_entry(gpointer data, gpointer user_data)
return;
}
#endif
if (unlikely(strcmp(typename, TYPE_HOST_POWERPC_CPU) == 0)) {
return;
}
name = g_strndup(typename,
strlen(typename) - strlen("-" TYPE_POWERPC_CPU));
@ -8427,6 +8423,11 @@ void ppc_cpu_list(FILE *f, fprintf_function cpu_fprintf)
g_slist_foreach(list, ppc_cpu_list_entry, &s);
g_slist_free(list);
#ifdef CONFIG_KVM
cpu_fprintf(f, "\n");
cpu_fprintf(f, "PowerPC %-16s\n", "host");
#endif
cpu_fprintf(f, "\n");
for (i = 0; i < ARRAY_SIZE(ppc_cpu_aliases); i++) {
ObjectClass *oc = ppc_cpu_class_by_name(ppc_cpu_aliases[i].model);