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[v1.05][X86] Improve support for old x86 CPUs (#220) by improving Pentium uarch detection and adding support to infer the CPU name from uarch when the corresponding CPUID level is not available

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Dr-Noob
2024-02-13 21:29:08 +00:00
parent 1504c5d0ef
commit cc16bc56ef
3 changed files with 181 additions and 130 deletions
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16
src/x86/cpuid.c
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@@ -486,9 +486,8 @@ struct cpuInfo* get_cpu_info(void) {
cpu->cpu_name = get_str_cpu_name_internal();
}
else {
cpu->cpu_name = emalloc(sizeof(char) * (strlen(STRING_UNKNOWN) + 1));
strcpy(cpu->cpu_name, STRING_UNKNOWN);
printWarn("Can't read cpu name from cpuid (needed extended level is 0x%.8X, max is 0x%.8X)", 0x80000004, cpu->maxExtendedLevels);
cpu->cpu_name = NULL;
printWarn("Can't read CPU name from cpuid (needed extended level is 0x%.8X, max is 0x%.8X)", 0x80000004, cpu->maxExtendedLevels);
}
cpu->topology_extensions = false;
@@ -538,12 +537,17 @@ struct cpuInfo* get_cpu_info(void) {
ptr->first_core_id = first_core;
ptr->feat = get_features_info(ptr);
// If any field of the struct is NULL,
// return inmideately, as further functions
// require valid fields (cach, topo, etc)
ptr->arch = get_cpu_uarch(ptr);
ptr->freq = get_frequency_info(ptr);
if (cpu->cpu_name == NULL && ptr == cpu) {
// If we couldnt read CPU name from cpuid, infer it now
cpu->cpu_name = infer_cpu_name_from_uarch(cpu->arch);
}
// If any field of the struct is NULL,
// return early, as next functions
// require non NULL fields in cach and topo
ptr->cach = get_cache_info(ptr);
if(ptr->cach == NULL) return cpu;