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. Secondary CPUs get their vcpu_info 16 * in xen_cpu_up_prepare_hvm(). 17 */ 18 xen_vcpu_setup(0); 19 20 /* 21 * The alternative logic (which patches the unlock/lock) runs before 22 * the smp bootup up code is activated. Hence we need to set this up 23 * the core kernel is being patched. Otherwise we will have only 24 * modules patched but not core code. 25 */ 26 xen_init_spinlocks(); 27 } 28 29 static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus) 30 { 31 int cpu; 32 33 native_smp_prepare_cpus(max_cpus); 34 WARN_ON(xen_smp_intr_init(0)); 35 36 xen_init_lock_cpu(0); 37 38 for_each_possible_cpu(cpu) { 39 if (cpu == 0) 40 continue; 41 42 /* Set default vcpu_id to make sure that we don't use cpu-0's */ 43 per_cpu(xen_vcpu_id, cpu) = XEN_VCPU_ID_INVALID; 44 } 45 } 46 47 #ifdef CONFIG_HOTPLUG_CPU 48 static void xen_hvm_cpu_die(unsigned int cpu) 49 { 50 if (common_cpu_die(cpu) == 0) { 51 xen_smp_intr_free(cpu); 52 xen_uninit_lock_cpu(cpu); 53 xen_teardown_timer(cpu); 54 } 55 } 56 #else 57 static void xen_hvm_cpu_die(unsigned int cpu) 58 { 59 BUG(); 60 } 61 #endif 62 63 void __init xen_hvm_smp_init(void) 64 { 65 if (!xen_have_vector_callback) 66 return; 67 68 smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus; 69 smp_ops.smp_send_reschedule = xen_smp_send_reschedule; 70 smp_ops.cpu_die = xen_hvm_cpu_die; 71 smp_ops.send_call_func_ipi = xen_smp_send_call_function_ipi; 72 smp_ops.send_call_func_single_ipi = xen_smp_send_call_function_single_ipi; 73 smp_ops.smp_prepare_boot_cpu = xen_hvm_smp_prepare_boot_cpu; 74 smp_ops.smp_cpus_done = xen_smp_cpus_done; 75 } 76