Avi Kivity wrote: > On 10/09/2011 12:05 PM, Liu, Jinsong wrote: >> Marcelo, >> >> I add test case for tsc deadline timer >> https://github.com/avikivity/kvm-unit-tests, as attached. >> >> According to the kvm-unit-tests README, I try to run >> qemu-system-x86_64 -device testdev,chardev=testlog -chardev >> file,id=testlog,path=apic.out -kernel ./x86/apic.flat but get >> nothing from the testlog 'apic.out' (BTW, at kvm side I did observe >> the expected tsc deadline timer action) >> >> I also try to run the README example >> qemu-system-x86_64 -device testdev,chardev=testlog -chardev >> file,id=testlog,path=msr.out -kernel ./x86/msr.flat but still get >> nothing from 'msr.out' >> >> Do I miss something? how can I get test log? > > This was recently changed, it now outputs to the serial port. > > Try > > > qemu-system-x86_64 -device testdev,chardev=testlog -chardev > file,id=testlog,path=apic.out -serial stdio -kernel ./x86/apic.flat > > Thanks Avi, I got test log as: enabling apic paging enabled cr0 = 80010011 cr3 = 7fff000 cr4 = 20 apic version: 50014 apic existence: PASS enabling apic x2apic not detected self ipi: PASS ioapic interrupt: PASS ioapic simultaneous interrupt: PASS tsc deadline timer: PASS tsc deadline timer enabled summary: 5 tests, 0 failures >> + >> +static void start_tsc_deadline_timer(void) >> +{ >> + unsigned a, d; >> + >> + handle_irq(TSC_DEADLINE_TIMER_VECTOR, tsc_deadline_timer_isr); >> + irq_enable(); + >> + asm ("rdmsr" : "=a"(a), "=d"(d) : "c"(MSR_IA32_TSC)); >> + asm ("wrmsr" : : "a"(a), "d"(d), "c"(MSR_IA32_TSCDEADLINE)); + >> asm volatile ("nop"); + report("tsc deadline timer", tdt_count == >> 1); +} > > Please use rdmsr()/wrmsr() from processor.h. > Updated. Thanks, Jinsong >> + >> +static int enable_tsc_deadline_timer(void) >> +{ >> + unsigned a, b, c, d; >> + uint32_t lvtt; >> + >> + asm ("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(1)); > > cpuid()... > >> + >> + if (c& (1<< 24)) { >> + lvtt = TSC_DEADLINE_TIMER_MODE | TSC_DEADLINE_TIMER_VECTOR; >> + apic_write(APIC_LVTT, lvtt); >> + start_tsc_deadline_timer(); >> + return 1; >> + } else { >> + return 0; >> + } >> +} >> + >> +static void test_tsc_deadline_timer(void) >> +{ >> + if(enable_tsc_deadline_timer()) { >> + printf("tsc deadline timer enabled\n"); >> + } else { >> + printf("tsc deadline timer not detected\n"); + } >> +} >> + >> #define MSR_APIC_BASE 0x0000001b >> >> void test_enable_x2apic(void) >> @@ -291,6 +342,8 @@ int main() >> test_sti_nmi(); >> test_multiple_nmi(); >> >> + test_tsc_deadline_timer(); >> + >> printf("\nsummary: %d tests, %d failures\n", g_tests, g_fail); >> >> return g_fail != 0; -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
