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Initial support for AMD Phoenix APU with hybrid architecture

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This work may not work: extended CPU Topology leaf is required.
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The Tumultuous Unicorn Of Darkness 2023-03-25 19:17:44 +01:00
parent 37462ab492
commit 7542db9879
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GPG key ID: 1E55EE2EFF18BC1A
3 changed files with 29 additions and 0 deletions
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3
libcpuid/cpuid_main.c
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@ -1157,6 +1157,9 @@ static cpu_purpose_t cpu_ident_purpose(struct cpu_raw_data_t* raw)
}
switch (vendor) {
case VENDOR_AMD:
purpose = cpuid_identify_purpose_amd(raw);
break;
case VENDOR_INTEL:
purpose = cpuid_identify_purpose_intel(raw);
break;

25
libcpuid/recog_amd.c
View file

@ -646,3 +646,28 @@ void cpuid_get_list_amd(struct cpu_list_t* list)
{
generic_get_cpu_list(cpudb_amd, COUNT_OF(cpudb_amd), list);
}
cpu_purpose_t cpuid_identify_purpose_amd(struct cpu_raw_data_t* raw)
{
/* Check for hybrid architecture
From Processor Programming Reference (PPR) for AMD Family 19h Model 70h, Revision A0 Processors
Available at https://www.amd.com/system/files/TechDocs/57019-A0-PUB_3.00.zip
- CPUID_Fn80000026_ECX [Extended CPU Topology][15:8] is LevelType.
LevelType 01h is Core.
- CPUID_Fn80000026_EBX [Extended CPU Topology][31:28] is CoreType.
Only valid while LevelType=Core.
*/
//FIXME: leaf CPUID_Fn80000026 needs to be added in cpu_raw_data_t
if (EXTRACTS_BITS(raw->ext_cpuid[0x26][ECX], 15, 8) == 0x1) {
debugf(3, "Detected AMD CPU hybrid architecture\n");
switch (EXTRACTS_BITS(raw->ext_cpuid[0x26][EBX], 31, 28)) {
case 0x0: return PURPOSE_PERFORMANCE;
case 0x1: return PURPOSE_EFFICIENCY;
default: return PURPOSE_GENERAL;
}
}
return PURPOSE_GENERAL;
}

1
libcpuid/recog_amd.h
View file

@ -28,5 +28,6 @@
int cpuid_identify_amd(struct cpu_raw_data_t* raw, struct cpu_id_t* data, struct internal_id_info_t* internal);
void cpuid_get_list_amd(struct cpu_list_t* list);
cpu_purpose_t cpuid_identify_purpose_amd(struct cpu_raw_data_t* raw);
#endif /* __RECOG_AMD_H__ */