1 #include <asm/smp.h> 2 3 #include <xen/events.h> 4 5 #include "xen-ops.h" 6 #include "smp.h" 7 8 9 static void __init xen_hvm_smp_prepare_boot_cpu(void) 10 { 11 BUG_ON(smp_processor_id() != 0); 12 native_smp_prepare_boot_cpu(); 13 14 /* 15 * Setup vcpu_info for boot CPU. 16 */ 17 xen_vcpu_setup(0); 18 19 /* 20 * The alternative logic (which patches the unlock/lock) runs before 21 * the smp bootup up code is activated. Hence we need to set this up 22 * the core kernel is being patched. Otherwise we will have only 23 * modules patched but not core code. 24 */ 25 xen_init_spinlocks(); 26 } 27 28 static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus) 29 { 30 native_smp_prepare_cpus(max_cpus); 31 WARN_ON(xen_smp_intr_init(0)); 32 33 xen_init_lock_cpu(0); 34 } 35 36 #ifdef CONFIG_HOTPLUG_CPU 37 static void xen_hvm_cpu_die(unsigned int cpu) 38 { 39 if (common_cpu_die(cpu) == 0) { 40 xen_smp_intr_free(cpu); 41 xen_uninit_lock_cpu(cpu); 42 xen_teardown_timer(cpu); 43 } 44 } 45 #else 46 static void xen_hvm_cpu_die(unsigned int cpu) 47 { 48 BUG(); 49 } 50 #endif 51 52 void __init xen_hvm_smp_init(void) 53 { 54 if (!xen_have_vector_callback) 55 return; 56 57 smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus; 58 smp_ops.smp_send_reschedule = xen_smp_send_reschedule; 59 smp_ops.cpu_die = xen_hvm_cpu_die; 60 smp_ops.send_call_func_ipi = xen_smp_send_call_function_ipi; 61 smp_ops.send_call_func_single_ipi = xen_smp_send_call_function_single_ipi; 62 smp_ops.smp_prepare_boot_cpu = xen_hvm_smp_prepare_boot_cpu; 63 } 64