57 lines
1.3 KiB
ReStructuredText
57 lines
1.3 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0
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.. include:: ../../disclaimer-zh_CN.rst
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:Original: Documentation/virt/acrn/cpuid.rst
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:翻译:
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司延腾 Yanteng Si <siyanteng@loongson.cn>
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:校译:
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时奎亮 Alex Shi <alexs@kernel.org>
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.. _cn_virt_acrn_cpuid:
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==============
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ACRN CPUID位域
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==============
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在ACRN超级管理器上运行的客户虚拟机可以使用CPUID检查其一些功能。
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ACRN的cpuid函数是:
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函数: 0x40000000
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返回::
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eax = 0x40000010
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ebx = 0x4e524341
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ecx = 0x4e524341
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edx = 0x4e524341
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注意，ebx，ecx和edx中的这个值对应于字符串“ACRNACRNACRN”。eax中的值对应于这个叶子
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中存在的最大cpuid函数，如果将来有更多的函数加入，将被更新。
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函数: define ACRN_CPUID_FEATURES (0x40000001)
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返回::
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ebx, ecx, edx
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eax = an OR'ed group of (1 << flag)
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其中 ``flag`` 的定义如下:
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================================= =========== ================================
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标志 值 描述
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================================= =========== ================================
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ACRN_FEATURE_PRIVILEGED_VM 0 客户虚拟机是一个有特权的虚拟机
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================================= =========== ================================
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函数: 0x40000010
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返回::
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ebx, ecx, edx
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eax = (Virtual) TSC frequency in kHz.
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