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86 lines
1.9 KiB
86 lines
1.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/thread_info.h> |
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#include <asm/smp.h> |
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#include <xen/events.h> |
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#include "xen-ops.h" |
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#include "smp.h" |
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static void __init xen_hvm_smp_prepare_boot_cpu(void) |
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{ |
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BUG_ON(smp_processor_id() != 0); |
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native_smp_prepare_boot_cpu(); |
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/* |
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* Setup vcpu_info for boot CPU. Secondary CPUs get their vcpu_info |
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* in xen_cpu_up_prepare_hvm(). |
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*/ |
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xen_vcpu_setup(0); |
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/* |
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* The alternative logic (which patches the unlock/lock) runs before |
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* the smp bootup up code is activated. Hence we need to set this up |
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* the core kernel is being patched. Otherwise we will have only |
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* modules patched but not core code. |
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*/ |
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xen_init_spinlocks(); |
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} |
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static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus) |
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{ |
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int cpu; |
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native_smp_prepare_cpus(max_cpus); |
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if (xen_have_vector_callback) { |
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WARN_ON(xen_smp_intr_init(0)); |
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xen_init_lock_cpu(0); |
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} |
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for_each_possible_cpu(cpu) { |
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if (cpu == 0) |
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continue; |
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/* Set default vcpu_id to make sure that we don't use cpu-0's */ |
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per_cpu(xen_vcpu_id, cpu) = XEN_VCPU_ID_INVALID; |
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} |
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} |
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#ifdef CONFIG_HOTPLUG_CPU |
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static void xen_hvm_cpu_die(unsigned int cpu) |
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{ |
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if (common_cpu_die(cpu) == 0) { |
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if (xen_have_vector_callback) { |
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xen_smp_intr_free(cpu); |
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xen_uninit_lock_cpu(cpu); |
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xen_teardown_timer(cpu); |
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} |
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} |
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} |
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#else |
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static void xen_hvm_cpu_die(unsigned int cpu) |
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{ |
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BUG(); |
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} |
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#endif |
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void __init xen_hvm_smp_init(void) |
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{ |
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smp_ops.smp_prepare_boot_cpu = xen_hvm_smp_prepare_boot_cpu; |
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smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus; |
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smp_ops.smp_cpus_done = xen_smp_cpus_done; |
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smp_ops.cpu_die = xen_hvm_cpu_die; |
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if (!xen_have_vector_callback) { |
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#ifdef CONFIG_PARAVIRT_SPINLOCKS |
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nopvspin = true; |
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#endif |
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return; |
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} |
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smp_ops.smp_send_reschedule = xen_smp_send_reschedule; |
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smp_ops.send_call_func_ipi = xen_smp_send_call_function_ipi; |
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smp_ops.send_call_func_single_ipi = xen_smp_send_call_function_single_ipi; |
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}
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