static void nmi_cpu_shutdown(void *dummy) { unsigned int v; int cpu = smp_processor_id(); struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu); v = apic_read(APIC_LVTERR); apic_write(APIC_LVTERR, v | APIC_LVT_MASKED); apic_write(APIC_LVTPC, per_cpu(saved_lvtpc, cpu)); apic_write(APIC_LVTERR, v); nmi_cpu_restore_registers(msrs); }
static void nmi_cpu_shutdown(void *dummy) { unsigned int v; int cpu = smp_processor_id(); struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu); /* restoring APIC_LVTPC can trigger an apic error because the delivery * mode and vector nr combination can be illegal. That's by design: on * power on apic lvt contain a zero vector nr which are legal only for * NMI delivery mode. So inhibit apic err before restoring lvtpc */ v = apic_read(APIC_LVTERR); apic_write(APIC_LVTERR, v | APIC_LVT_MASKED); apic_write(APIC_LVTPC, per_cpu(saved_lvtpc, cpu)); apic_write(APIC_LVTERR, v); nmi_cpu_restore_registers(msrs); }