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tsc: fix it being broken when max base leaf < 0x15

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Matheus
2024-10-28 16:24:43 -03:00
parent 9c108b8656
commit e0f1fd3e03
1 changed files with 3 additions and 4 deletions
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kernel-src/arch/x86-64/tsc.c
+3 -4
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@@ -37,15 +37,13 @@ static timekeeper_source_info_t *tsc_init(void) {
if (hz)
goto leave;
bool need_calibration = false;
bool need_calibration = true;
if (cpuid_base_max_leaf() >= 0x15) {
cpuid_results_t cpuid_results;
cpuid(0x15, &cpuid_results);
if (cpuid_results.eax == 0 || cpuid_results.ebx == 0 || cpuid_results.ecx == 0) {
need_calibration = true;
if (cpuid_results.eax == 0 || cpuid_results.ebx == 0 || cpuid_results.ecx == 0)
goto calibrate;
}
uint64_t core_frequency = cpuid_results.ecx;
uint64_t core_numerator = cpuid_results.ebx;
@@ -53,6 +51,7 @@ static timekeeper_source_info_t *tsc_init(void) {
uint64_t tsc_frequency = core_frequency * core_numerator / core_denominator;
hz = tsc_frequency;
need_calibration = false;
}
calibrate: