Vitaly Kuznetsov | a52482d | 2017-03-14 18:35:45 +0100 | [diff] [blame] | 1 | #include <asm/smp.h> |
| 2 | |
Boris Ostrovsky | 84d582d | 2017-04-24 15:04:53 -0400 | [diff] [blame] | 3 | #include <xen/events.h> |
| 4 | |
Vitaly Kuznetsov | a52482d | 2017-03-14 18:35:45 +0100 | [diff] [blame] | 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 | { |
Boris Ostrovsky | 84d582d | 2017-04-24 15:04:53 -0400 | [diff] [blame] | 54 | if (!xen_have_vector_callback) |
| 55 | return; |
| 56 | |
Vitaly Kuznetsov | a52482d | 2017-03-14 18:35:45 +0100 | [diff] [blame] | 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 | } |