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bugfix: 修正某些情况下多核启动信号丢失的问题

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This commit is contained in:
fslongjin 2022-07-11 18:37:09 +08:00
parent 88bcbdc681
commit fdc5151049
1 changed files with 6 additions and 4 deletions
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10
kernel/smp/smp.c
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@ -46,19 +46,21 @@ void smp_init()
ipi_regiserIPI(0xc8, NULL, &ipi_0xc8_handler, NULL, NULL, "IPI 0xc8");
ipi_send_IPI(DEST_PHYSICAL, IDLE, ICR_LEVEL_DE_ASSERT, EDGE_TRIGGER, 0x00, ICR_INIT, ICR_ALL_EXCLUDE_Self, true, 0x00);
kdebug("total_processor_num=%d", total_processor_num);
for (int i = 1; i < total_processor_num; ++i) // i从1开始，不初始化bsp
{
if (proc_local_apic_structs[i]->ACPI_Processor_UID == 0)
--total_processor_num;
if (proc_local_apic_structs[i]->local_apic_id > total_processor_num)
continue;
{
--total_processor_num;
continue;}
kdebug("[core %d] acpi processor UID=%d, APIC ID=%d, flags=%#010lx", i, proc_local_apic_structs[i]->ACPI_Processor_UID, proc_local_apic_structs[i]->local_apic_id, proc_local_apic_structs[i]->flags);
spin_lock(&multi_core_starting_lock);
preempt_enable(); // 由于ap处理器的pcb与bsp的不同，因此ap处理器放锁时，bsp的自旋锁持有计数不会发生改变,需要手动恢复preempt count
current_starting_cpu = proc_local_apic_structs[i]->local_apic_id;
kdebug("[core %d] acpi processor UID=%d, APIC ID=%d, flags=%#010lx", i, proc_local_apic_structs[i]->ACPI_Processor_UID, proc_local_apic_structs[i]->local_apic_id, proc_local_apic_structs[i]->flags);
// 为每个AP处理器分配栈空间
cpu_core_info[current_starting_cpu].stack_start = (uint64_t)kmalloc(STACK_SIZE, 0) + STACK_SIZE;
@ -154,7 +156,7 @@ void smp_ap_start()
spin_unlock(&multi_core_starting_lock);
preempt_disable();// 由于ap处理器的pcb与bsp的不同，因此ap处理器放锁时，需要手动恢复preempt count
sti();
kdebug("1212221212");
while (1)
hlt();