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
+
+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.
+
+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;
--
error compiling committee.c: too many arguments to function
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