From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-m19731100.qiye.163.com (mail-m19731100.qiye.163.com [220.197.31.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1B3E28248C; Mon, 13 Oct 2025 03:35:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.100 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760326506; cv=none; b=D4+FO9LVaVnlm1ZleUJplVYb/hrEX1e2Ehi5q4L8Lm/ZF+XTFDW5p+XTY8ROs8BBFNfDUITRI2xIEJJRykYe0WDGsePHu+gxLvLdRYUSJxFuQX7hdzMlJTMlhY7coLxA9qvFWTIG0bjJVgrGSLNTN1vREXQZTjREL8nSt4nF2v0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760326506; c=relaxed/simple; bh=svEPDG7/Qmde6PXCAlOUZOHbwwzhJEx22CAaTz9dfLU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=chWyw4TJ04mKOmG+jh8W7VkjjLlM1+mzdRAGOJcTZAMOknD7pqid8tXgNnrfeXDPfherIf8xuRNEDk3pUXylHI6p2lOX5e2cIt4MgBGPCOHrVIQkzh0/C6oWkCKTZbZUbxcnBaROmsQeb5sKinEHse8sS6mP8FMIXBHR93iw49M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=cqsoftware.com.cn; spf=pass smtp.mailfrom=cqsoftware.com.cn; dkim=pass (1024-bit key) header.d=cqsoftware.com.cn header.i=@cqsoftware.com.cn header.b=JtCAD0qv; arc=none smtp.client-ip=220.197.31.100 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=cqsoftware.com.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=cqsoftware.com.cn Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=cqsoftware.com.cn header.i=@cqsoftware.com.cn header.b="JtCAD0qv" Received: from localhost.localdomain (unknown [1.193.57.161]) by smtp.qiye.163.com (Hmail) with ESMTP id 25a875df5; Mon, 13 Oct 2025 11:19:37 +0800 (GMT+08:00) From: Shuo Zhao To: alexs@kernel.org, si.yanteng@linux.dev, corbet@lwn.net Cc: dzm91@hust.edu.cn, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Shuo Zhao Subject: [PATCH v2] docs/zh_CN: Add secrets coco Chinese translation Date: Mon, 13 Oct 2025 11:19:27 +0800 Message-ID: <20251013031928.36643-1-zhaoshuo@cqsoftware.com.cn> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-HM-Tid: 0a99db94a98409d0kunm47b4f9442c5cedb X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWS1ZQUlXWQ8JGhUIEh9ZQVlDTkxJVkwZTU1CGRhMGkNKSlYVFAkWGhdVEwETFh oSFyQUDg9ZV1kYEgtZQVlKVUpCSFVOTFVKTUpZV1kWGg8SFR0UWUFZT0tIVUpLSU9PT0hVSktLVU pCS0tZBg++ DKIM-Signature: a=rsa-sha256; b=JtCAD0qvvzp4t4C4q0i97WqrQ7Upf1frE3SArCYeIlhUHxWWq5/ax6qCYw3+mnlwHYSKmGtjq4s2qwrbirOX9ArN44Th6KnOdz0kYtCt7HYcqGFzh9S/VT5Xt0Yeba9G4eidVRTrfkNAJRu/Dd2d4/UJBZC7D4NBQdpNGfGESHY=; s=default; c=relaxed/relaxed; d=cqsoftware.com.cn; v=1; bh=h2/6R3OlWKqibne9cw3Tz9uqHUzrB6MhtFoNxA+g9f8=; h=date:mime-version:subject:message-id:from; Translate .../security/secrets/coco.rst into Chinese. Update the translation through commit d56b699d76d1 ("Documentation: Fix typos"). Signed-off-by: Shuo Zhao --- v2: Revise the references. .../zh_CN/security/secrets/coco.rst | 96 +++++++++++++++++++ .../zh_CN/security/secrets/index.rst | 9 +- 2 files changed, 99 insertions(+), 6 deletions(-) create mode 100644 Documentation/translations/zh_CN/security/secrets/coco.rst diff --git a/Documentation/translations/zh_CN/security/secrets/coco.rst b/Documentation/translations/zh_CN/security/secrets/coco.rst new file mode 100644 index 000000000000..a27bc1acdb7c --- /dev/null +++ b/Documentation/translations/zh_CN/security/secrets/coco.rst @@ -0,0 +1,96 @@ +.. SPDX-License-Identifier: GPL-2.0 +.. include:: ../../disclaimer-zh_CN.rst + +:Original: Documentation/security/secrets/coco.rst + +:翻译: + + 赵硕 Shuo Zhao + +============ +机密计算密钥 +============ + +本文档介绍了在EFI驱动程序和efi_secret内核模块中，机密计算密钥从固件 +到操作系统的注入处理流程。 + +简介 +==== + +机密计算硬件（如AMD SEV，Secure Encrypted Virtualization）允许虚拟机 +所有者将密钥注入虚拟机（VM）内存，且主机/虚拟机监控程序无法读取这些密 +钥。在SEV中，密钥注入需在虚拟机启动流程的早期阶段（客户机开始运行前） +执行。 + +efi_secret内核模块允许用户空间应用程序通过securityfs（安全文件系统）访 +问这些密钥。 + +密钥数据流 +========== + +客户机固件可能会为密钥注入预留一块指定的内存区域，并将该区域的位置（基准 +客户机物理地址GPA和长度）在EFI配置表中，通过 ``LINUX_EFI_COCO_SECRET_AREA_GUID`` +条目（对应的GUID值为 ``adf956ad-e98c-484c-ae11-b51c7d336447`` ）的形式发布。 +固件应将此内存区域标记为 ``EFI_RESERVED_TYPE`` ，因此内核不应将其用于自身用途。 + +虚拟机启动过程中，虚拟机管理器可向该区域注入密钥。在AMD SEV和SEV-ES中，此 +操作通过 ``KVM_SEV_LAUNCH_SECRET`` 命令执行（参见 [sev_CN]_ ）。注入的“客户机 +所有者密钥数据”应采用带GUID的密钥值表结构，其二进制格式在 ``drivers/virt/ +coco/efi_secret/efi_secret.c`` 文件的EFI密钥区域结构部分中有详细描述。 + +内核启动时，内核的EFI驱动程序将保存密钥区域位置（来自EFI配置表）到 ``efi.coco_secret`` +字段。随后，它会检查密钥区域是否已填充：映射该区域并检查其内容是否以 +``EFI_SECRET_TABLE_HEADER_GUID`` （对应的GUID为 ``1e74f542-71dd-4d66-963e-ef4287ff173b`` ） +开头。如果密钥区域已填充，EFI驱动程序将自动加载efi_secret内核模块，并通过securityfs将密钥 +暴露给用户空间应用程序。efi_secret文件系统接口的详细信息请参考 [secrets-coco-abi_CN]_ 。 + + +应用使用示例 +============ + +假设客户机需要对加密文件进行计算处理。客户机所有者通过密钥注入机制提供解密密钥 +（即密钥）。客户机应用程序从efi_secret文件系统读取该密钥，然后将文件解密到内存中， +接着对内容进行需要的计算。 + +在此示例中，主机无法从磁盘镜像中读取文件，因为文件是加密的；主机无法读取解密密钥， +因为它是通过密钥注入机制（即安全通道）传递的；主机也无法读取内存中的解密内容，因为 +这是一个机密型（内存加密）客户机。 + +以下是一个简单的示例，展示了在客户机中使用efi_secret模块的过程，在启动时注入了 +一个包含4个密钥的EFI密钥区域:: + + # ls -la /sys/kernel/security/secrets/coco + total 0 + drwxr-xr-x 2 root root 0 Jun 28 11:54 . + drwxr-xr-x 3 root root 0 Jun 28 11:54 .. + -r--r----- 1 root root 0 Jun 28 11:54 736870e5-84f0-4973-92ec-06879ce3da0b + -r--r----- 1 root root 0 Jun 28 11:54 83c83f7f-1356-4975-8b7e-d3a0b54312c6 + -r--r----- 1 root root 0 Jun 28 11:54 9553f55d-3da2-43ee-ab5d-ff17f78864d2 + -r--r----- 1 root root 0 Jun 28 11:54 e6f5a162-d67f-4750-a67c-5d065f2a9910 + + # hd /sys/kernel/security/secrets/coco/e6f5a162-d67f-4750-a67c-5d065f2a9910 + 00000000 74 68 65 73 65 2d 61 72 65 2d 74 68 65 2d 6b 61 |these-are-the-ka| + 00000010 74 61 2d 73 65 63 72 65 74 73 00 01 02 03 04 05 |ta-secrets......| + 00000020 06 07 |..| + 00000022 + + # rm /sys/kernel/security/secrets/coco/e6f5a162-d67f-4750-a67c-5d065f2a9910 + + # ls -la /sys/kernel/security/secrets/coco + total 0 + drwxr-xr-x 2 root root 0 Jun 28 11:55 . + drwxr-xr-x 3 root root 0 Jun 28 11:54 .. + -r--r----- 1 root root 0 Jun 28 11:54 736870e5-84f0-4973-92ec-06879ce3da0b + -r--r----- 1 root root 0 Jun 28 11:54 83c83f7f-1356-4975-8b7e-d3a0b54312c6 + -r--r----- 1 root root 0 Jun 28 11:54 9553f55d-3da2-43ee-ab5d-ff17f78864d2 + + +参考文献 +======== + +请参见 [sev-api-spec_CN]_ 以获取有关SEV ``LAUNCH_SECRET`` 操作的更多信息。 + +.. [sev_CN] Documentation/virt/kvm/x86/amd-memory-encryption.rst +.. [secrets-coco-abi_CN] Documentation/ABI/testing/securityfs-secrets-coco +.. [sev-api-spec_CN] https://www.amd.com/system/files/TechDocs/55766_SEV-KM_API_Specification.pdf + diff --git a/Documentation/translations/zh_CN/security/secrets/index.rst b/Documentation/translations/zh_CN/security/secrets/index.rst index 5ea78713f10e..38464dcb2c3c 100644 --- a/Documentation/translations/zh_CN/security/secrets/index.rst +++ b/Documentation/translations/zh_CN/security/secrets/index.rst @@ -5,13 +5,10 @@ :翻译: -===================== +======== 密钥文档 -===================== +======== .. toctree:: - -TODOLIST: - -* coco + coco -- 2.49.0