static int xen_pv_cpu_up(unsigned int cpu, struct task_struct *idle)
{
int rc;
common_cpu_up(cpu, idle);
xen_setup_runstate_info(cpu);
/*
* PV VCPUs are always successfully taken down (see 'while' loop
* in xen_cpu_die()), so -EBUSY is an error.
*/
rc = cpu_check_up_prepare(cpu);
if (rc)
return rc;
/* make sure interrupts start blocked */
per_cpu(xen_vcpu, cpu)->evtchn_upcall_mask = 1;
rc = cpu_initialize_context(cpu, idle);
if (rc)
return rc;
xen_pmu_init(cpu);
rc = HYPERVISOR_vcpu_op(VCPUOP_up, xen_vcpu_nr(cpu), NULL);
BUG_ON(rc);
while (cpu_report_state(cpu) != CPU_ONLINE)
HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
return 0;
}
void xen_arch_resume(void)
{
int cpu;
on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
for_each_online_cpu(cpu)
xen_pmu_init(cpu);
}
static void __init xen_pv_smp_prepare_cpus(unsigned int max_cpus)
{
unsigned cpu;
unsigned int i;
if (skip_ioapic_setup) {
char *m = (max_cpus == 0) ?
"The nosmp parameter is incompatible with Xen; " \
"use Xen dom0_max_vcpus=1 parameter" :
"The noapic parameter is incompatible with Xen";
xen_raw_printk(m);
panic(m);
}
xen_init_lock_cpu(0);
smp_store_boot_cpu_info();
cpu_data(0).x86_max_cores = 1;
for_each_possible_cpu(i) {
zalloc_cpumask_var(&per_cpu(cpu_sibling_map, i), GFP_KERNEL);
zalloc_cpumask_var(&per_cpu(cpu_core_map, i), GFP_KERNEL);
zalloc_cpumask_var(&per_cpu(cpu_llc_shared_map, i), GFP_KERNEL);
}
set_cpu_sibling_map(0);
speculative_store_bypass_ht_init();
xen_pmu_init(0);
if (xen_smp_intr_init(0) || xen_smp_intr_init_pv(0))
BUG();
if (!alloc_cpumask_var(&xen_cpu_initialized_map, GFP_KERNEL))
panic("could not allocate xen_cpu_initialized_map\n");
cpumask_copy(xen_cpu_initialized_map, cpumask_of(0));
/* Restrict the possible_map according to max_cpus. */
while ((num_possible_cpus() > 1) && (num_possible_cpus() > max_cpus)) {
for (cpu = nr_cpu_ids - 1; !cpu_possible(cpu); cpu--)
continue;
set_cpu_possible(cpu, false);
}
for_each_possible_cpu(cpu)
set_cpu_present(cpu, true);
}
static int __init hyper_sysfs_init(void)
{
int ret;
if (!xen_domain())
return -ENODEV;
ret = xen_sysfs_type_init();
if (ret)
goto out;
ret = xen_sysfs_version_init();
if (ret)
goto version_out;
ret = xen_compilation_init();
if (ret)
goto comp_out;
ret = xen_sysfs_uuid_init();
if (ret)
goto uuid_out;
ret = xen_properties_init();
if (ret)
goto prop_out;
#ifdef CONFIG_XEN_HAVE_VPMU
if (xen_initial_domain()) {
ret = xen_pmu_init();
if (ret) {
sysfs_remove_group(hypervisor_kobj,
&xen_properties_group);
goto prop_out;
}
}
#endif
goto out;
prop_out:
sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
uuid_out:
sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
comp_out:
sysfs_remove_group(hypervisor_kobj, &version_group);
version_out:
sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
out:
return ret;
}