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i386: Introduce use_epyc_apic_id_encoding in X86CPUDefinition

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Add a boolean variable use_epyc_apic_id_encoding in X86CPUDefinition.
This will be set if this cpu model needs to use new EPYC based
apic id encoding.

Override the handlers with EPYC based handlers if use_epyc_apic_id_encoding
is set. This will be done in x86_cpus_init.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <158396723514.58170.14825482171652019765.stgit@naples-babu.amd.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Babu Moger 2020-03-11 17:53:55 -05:00 committed by Eduardo Habkost
parent 6121c7fbfd
commit 0c1538cb1a
2 changed files with 17 additions and 0 deletions
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16
target/i386/cpu.c
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@ -1614,6 +1614,10 @@ typedef struct X86CPUDefinition {
FeatureWordArray features;
const char *model_id;
CPUCaches *cache_info;
/* Use AMD EPYC encoding for apic id */
bool use_epyc_apic_id_encoding;
/*
* Definitions for alternative versions of CPU model.
* List is terminated by item with version == 0.
@ -1655,6 +1659,18 @@ static const X86CPUVersionDefinition *x86_cpu_def_get_versions(X86CPUDefinition
return def->versions ?: default_version_list;
}
bool cpu_x86_use_epyc_apic_id_encoding(const char *cpu_type)
{
X86CPUClass *xcc = X86_CPU_CLASS(object_class_by_name(cpu_type));
assert(xcc);
if (xcc->model && xcc->model->cpudef) {
return xcc->model->cpudef->use_epyc_apic_id_encoding;
} else {
return false;
}
}
static CPUCaches epyc_cache_info = {
.l1d_cache = &(CPUCacheInfo) {
.type = DATA_CACHE,

1
target/i386/cpu.h
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@ -1897,6 +1897,7 @@ void cpu_clear_apic_feature(CPUX86State *env);
void host_cpuid(uint32_t function, uint32_t count,
uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx);
void host_vendor_fms(char *vendor, int *family, int *model, int *stepping);
bool cpu_x86_use_epyc_apic_id_encoding(const char *cpu_type);
/* helper.c */
bool x86_cpu_tlb_fill(CPUState *cs, vaddr address, int size,