17d36db35SAvi Kivity #include "libcflat.h" 20d7251beSJason Wang #include "processor.h" 37d36db35SAvi Kivity 4867f820dSPaolo Bonzini #define CPUID_80000001_EDX_RDTSCP (1 << 27) 5867f820dSPaolo Bonzini int check_cpuid_80000001_edx(unsigned int bit) 6867f820dSPaolo Bonzini { 7867f820dSPaolo Bonzini return (cpuid(0x80000001).d & bit) != 0; 8867f820dSPaolo Bonzini } 9867f820dSPaolo Bonzini 10*10631a5bSPaolo Bonzini #define CPUID_7_0_ECX_RDPID (1 << 22) 11*10631a5bSPaolo Bonzini int check_cpuid_7_0_ecx(unsigned int bit) 12*10631a5bSPaolo Bonzini { 13*10631a5bSPaolo Bonzini return (cpuid_indexed(7, 0).c & bit) != 0; 14*10631a5bSPaolo Bonzini } 15867f820dSPaolo Bonzini 167d36db35SAvi Kivity void test_wrtsc(u64 t1) 177d36db35SAvi Kivity { 187d36db35SAvi Kivity u64 t2; 197d36db35SAvi Kivity 207d36db35SAvi Kivity wrtsc(t1); 217d36db35SAvi Kivity t2 = rdtsc(); 22b006d7ebSAndrew Jones printf("rdtsc after wrtsc(%" PRId64 "): %" PRId64 "\n", t1, t2); 237d36db35SAvi Kivity } 247d36db35SAvi Kivity 25867f820dSPaolo Bonzini void test_rdtscp(u64 aux) 26867f820dSPaolo Bonzini { 27867f820dSPaolo Bonzini u32 ecx; 28867f820dSPaolo Bonzini 29867f820dSPaolo Bonzini wrmsr(MSR_TSC_AUX, aux); 30867f820dSPaolo Bonzini rdtscp(&ecx); 312ce7a6c7SRadim Krčmář report("Test RDTSCP %" PRIu64, ecx == aux, aux); 32867f820dSPaolo Bonzini } 33867f820dSPaolo Bonzini 34*10631a5bSPaolo Bonzini void test_rdpid(u64 aux) 35*10631a5bSPaolo Bonzini { 36*10631a5bSPaolo Bonzini u32 eax; 37*10631a5bSPaolo Bonzini 38*10631a5bSPaolo Bonzini wrmsr(MSR_TSC_AUX, aux); 39*10631a5bSPaolo Bonzini asm (".byte 0xf3, 0x0f, 0xc7, 0xf8" : "=a" (eax)); 40*10631a5bSPaolo Bonzini report("Test rdpid %%eax %d", eax == aux, aux); 41*10631a5bSPaolo Bonzini } 42*10631a5bSPaolo Bonzini 437d36db35SAvi Kivity int main() 447d36db35SAvi Kivity { 457d36db35SAvi Kivity u64 t1, t2; 467d36db35SAvi Kivity 477d36db35SAvi Kivity t1 = rdtsc(); 487d36db35SAvi Kivity t2 = rdtsc(); 49b006d7ebSAndrew Jones printf("rdtsc latency %u\n", (unsigned)(t2 - t1)); 507d36db35SAvi Kivity 517d36db35SAvi Kivity test_wrtsc(0); 527d36db35SAvi Kivity test_wrtsc(100000000000ull); 53867f820dSPaolo Bonzini 54867f820dSPaolo Bonzini if (check_cpuid_80000001_edx(CPUID_80000001_EDX_RDTSCP)) { 55867f820dSPaolo Bonzini test_rdtscp(0); 56867f820dSPaolo Bonzini test_rdtscp(10); 57867f820dSPaolo Bonzini test_rdtscp(0x100); 58867f820dSPaolo Bonzini } else 59867f820dSPaolo Bonzini printf("rdtscp not supported\n"); 60*10631a5bSPaolo Bonzini 61*10631a5bSPaolo Bonzini if (check_cpuid_7_0_ecx(CPUID_7_0_ECX_RDPID)) { 62*10631a5bSPaolo Bonzini test_rdpid(0); 63*10631a5bSPaolo Bonzini test_rdpid(10); 64*10631a5bSPaolo Bonzini test_rdpid(0x100); 65*10631a5bSPaolo Bonzini } else 66*10631a5bSPaolo Bonzini printf("rdpid not supported\n"); 6732b9603cSRadim Krčmář return report_summary(); 687d36db35SAvi Kivity } 69