函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\fpu\xstate.c Create Date:2022-07-27 08:50:43
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：We could cache this like xstate_size[], but we only use* it here, so it would be a waste of space.

函数原型：static int xfeature_is_aligned(int xfeature_nr)

返回类型：int

参数：

类型参数名称
intxfeature_nr
331  This check is important because it is easy to get XSTATE_** confused with XSTATE_BIT_*.(xfeature_nr)
332  cpuid_count(XSTATE_CPUID, xfeature_nr, & eax, & ebx, & ecx, & edx)
338  返回:非非ecx按位与2的值
调用者
名称描述
setup_xstate_compThis function sets up offsets and sizes of all extended states in* xsave area. This supports both standard format and compacted format* of the xsave aread.
do_extra_xstate_size_checksThis essentially double-checks what the cpu told us about* how large the XSAVE buffer needs to be. We are recalculating* it to be safe.