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docs/zh_CN: Add tpm tpm_tis Chinese translation
Translate .../security/tpm/tpm_tis.rst into Chinese.
Update the translation through commit 8a55256a84
("Documentation: tpm_tis")
Reviewed-by: Alex Shi <alexs@kernel.org>
Signed-off-by: Shuo Zhao <zhaoshuo@cqsoftware.com.cn>
Reviewed-by: Yanteng Si <si.yanteng@linux.dev>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/ac55092bc3f1b3ec51f3e2dd596616ade1a32076.1737603330.git.zhaoshuo@cqsoftware.com.cn
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tpm_event_log
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tpm-security
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tpm_tis
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TODOLIST:
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* tpm_tis
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* tpm_vtpm_proxy
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* xen-tpmfront
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* tpm_ftpm_tee
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43
Documentation/translations/zh_CN/security/tpm/tpm_tis.rst
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43
Documentation/translations/zh_CN/security/tpm/tpm_tis.rst
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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/security/tpm/tpm_tis.rst
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:翻译:
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赵硕 Shuo Zhao <zhaoshuo@cqsoftware.com.cn>
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TPM FIFO接口驱动
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================
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TCG PTP规范定义了两种接口类型:FIFO和CRB。前者基于顺序的读写操作,
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后者基于包含完整命令或响应的缓冲区。
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FIFO(先进先出)接口被tpm_tis_core依赖的驱动程序使用。最初,Linux只
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有一个名为tpm_tis的驱动,覆盖了内存映射(即 MMIO)接口,但后来它被
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扩展以支持TCG标准所支持的其他物理接口。
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由于历史原因,最初的MMIO驱动被称为tpm_tis,而FIFO驱动的框架被命名为
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tpm_tis_core。在tpm_tis中的“tis”后缀来自TPM接口规范,这是针对TPM1.x
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芯片的硬件接口规范。
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通信基于一个由TPM芯片通过硬件总线或内存映射共享的20KiB 缓冲区,具体
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取决于物理接线。该缓冲区进一步分为五个相等大小的4KiB缓冲区,为CPU和
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TPM之间的通信提供等效的寄存器集。这些通信端点在TCG术语中称为localities。
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当内核想要向TPM芯片发送命令时,它首先通过在TPM_ACCESS寄存器中设置
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requestUse位来保留locality0。当访问被授予时,该位由芯片清除。一旦完成
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通信,内核会写入TPM_ACCESS.activeLocality位。这告诉芯片该本地性已被
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释放。
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待处理的本地性由芯片按优先级降序逐个服务,一次一个:
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- Locality0优先级最低。
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- Locality5优先级最高。
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关于localities的更多信息和含义,请参阅TCG PC客户端平台TPM 配置文件规范的第3.2节。
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参考文献
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========
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TCG PC客户端平台TPM配置文件(PTP)规范
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https://trustedcomputinggroup.org/resource/pc-client-platform-tpm-profile-ptp-specification/
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