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- #include "libcflat.h"
- #include "processor.h"
- #define IA32_TSC_ADJUST 0x3b
- int main()
- {
- u64 t1, t2, t3, t4, t5;
- u64 est_delta_time;
- if (cpuid(7).b & (1 << 1)) {
- report("IA32_TSC_ADJUST msr initialization",
- rdmsr(IA32_TSC_ADJUST) == 0x0);
- t3 = 100000000000ull;
- t1 = rdtsc();
- wrmsr(IA32_TSC_ADJUST, t3);
- t2 = rdtsc();
- report("IA32_TSC_ADJUST msr read / write",
- rdmsr(IA32_TSC_ADJUST) == t3);
- report("TSC adjustment for IA32_TSC_ADJUST value",
- (t2 - t1) >= t3);
- t3 = 0x0;
- wrmsr(IA32_TSC_ADJUST, t3);
- report("IA32_TSC_ADJUST msr read / write",
- rdmsr(IA32_TSC_ADJUST) == t3);
- t4 = 100000000000ull;
- t1 = rdtsc();
- wrtsc(t4);
- t2 = rdtsc();
- t5 = rdmsr(IA32_TSC_ADJUST);
-
-
- est_delta_time = t4 - t5 - t1;
-
- report("IA32_TSC_ADJUST msr adjustment on tsc write",
- est_delta_time <= (2 * (t2 - t4)));
- }
- else {
- report("IA32_TSC_ADJUST feature not enabled", true);
- }
- return report_summary();
- }
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