函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\cpu\common.c Create Date:2022-07-27 08:55:20
Last Modify:2020-03-16 20:28:31 Copyright©Brick
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函数名称：Load a fixmap remapping of the per-cpu GDT

函数原型：void load_fixmap_gdt(int cpu)

返回类型：void

参数：

类型参数名称
intcpu
604  address等于Provide the fixmap address of the remapped GDT
605  size等于GDT_SIZE减1
606  load_gdt( & gdt_descr)
调用者
名称描述
cpu_initpu_init() initializes state that is per-CPU. Some data is already* initialized (naturally) in the bootstrap process, such as the GDT* and IDT. We reload them nevertheless, this function acts as a* 'CPU state barrier', nothing should get across.
native_load_tr_descThe LTR instruction marks the TSS GDT entry as busy. On 64-bit, the GDT is* a read-only remapping. To prevent a page fault, the GDT is switched to the* original writeable version when needed.