src/sys/dev/tprof/tprof_x86_intel.c - diff

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version 1.2.8.2, 2019/06/10 22:07:33

version 1.2.8.3, 2020/04/13 08:04:49

Line 119 tprof_intel_start_cpu(void *arg1, void *

wrmsr(MSR_PERFCTR0, counter_reset_val);

wrmsr(MSR_EVNTSEL0, evtval);

intel_lapic_saved[cpu_index(ci)] = lapic_readreg(LAPIC_PCINT);

intel_lapic_saved[cpu_index(ci)] = lapic_readreg(LAPIC_LVT_PCINT);

lapic_writereg(LAPIC_PCINT, LAPIC_DLMODE_NMI);

lapic_writereg(LAPIC_LVT_PCINT, LAPIC_DLMODE_NMI);

}

static void

Line 131 tprof_intel_stop_cpu(void *arg1, void *a

wrmsr(MSR_EVNTSEL0, 0);

wrmsr(MSR_PERFCTR0, 0);

lapic_writereg(LAPIC_PCINT, intel_lapic_saved[cpu_index(ci)]);

lapic_writereg(LAPIC_LVT_PCINT, intel_lapic_saved[cpu_index(ci)]);

}

static int

Line 162 tprof_intel_nmi(const struct trapframe *

wrmsr(MSR_PERFCTR0, counter_reset_val);

/* unmask PMI */

pcint = lapic_readreg(LAPIC_PCINT);

pcint = lapic_readreg(LAPIC_LVT_PCINT);

KASSERT((pcint & LAPIC_LVT_MASKED) != 0);

lapic_writereg(LAPIC_PCINT, pcint & ~LAPIC_LVT_MASKED);

lapic_writereg(LAPIC_LVT_PCINT, pcint & ~LAPIC_LVT_MASKED);

return 1;

}