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Change check to be sure Extended Topology Information (CPUID.0BH:EBX[15:0]) is supported

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This commit is contained in:
Sam Demeulemeester 2022-08-15 22:26:22 +02:00
parent 9660eead4e
commit 02702fa8c5
1 changed files with 6 additions and 2 deletions
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8
system/cpuid.c
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@ -181,7 +181,11 @@ void cpuid_init(void)
case 'G':
if (cpuid_info.vendor_id.str[7] == 'T') break; // Transmeta
// Intel
if (cpuid_info.max_cpuid >= 0xB && cpuid_info.flags.x2apic) {
if (cpuid_info.max_cpuid >= 0xB) {
cpuid(0xB, 0, &reg[0], &reg[1], &reg[2], &reg[3]);
}
if (cpuid_info.max_cpuid >= 0xB && (reg[1] & 0xFF) != 0) { // Check if Extended Topology Information is available
// Populate Hybrid Status (CPUID 7.EDX[15]) for Alder Lake+
cpuid(0x7, 0, &reg[0], &reg[1], &reg[2], &reg[3]);
@ -191,7 +195,7 @@ void cpuid_init(void)
cpuid_info.topology.ecore_count = 0;
}
for (int i=0; i < 4; i++) {
for (int i = 0; i < 4; i++) {
cpuid(0xB, i, &reg[0], &reg[1], &reg[2], &reg[3]);
switch((reg[2] >> 8) & 0xFF) {