From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 10715606A31D for ; Thu, 29 Oct 2026 17:47:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=TbIYeQ+n; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=kcRnpPJD DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Date: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Cc:To:Subject: From:Message-ID:MIME-Version:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=J/TblnclnFoCka+GHUfBxKb2uy4EUXad9o50TA7nORg=; b=TbIYeQ+nn/l7ezFsnKBO+iD3xF KiP5YXwgMhFAa5nRNCcAbJ4ub+E4y10M8TL49F2LCKE8rjPyRR4bT0QC22Nrp9BfnXji5ocrJCIV3 XpmsxATVHsFa4mcPkxsraHWbtjqOvhjPbw4r02pMRBPFkmGamxSRUgyuO9/2xCCqyJxe1p/B0KBfV ljlzPLSInqshZe1dO9qPn/8kHDIQAn3+H8COCgQ+CwoB8fQKBKEt8PBVkKbSMkfTBSDtMr8ktdPJX P+fcHw2Zcsfo+tWsQb1sOdBoa5sZCqnA2TIVUY08LxF/uTNgGo1kQFDOVFjfa8HteVVIS9Kns7Tai OLUky9dw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xMUDb-0000000A0GF-3jw0; Thu, 29 Oct 2026 17:47:15 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xMUDZ-0000000A0Fq-3pp3 for kexec@lists.infradead.org; Thu, 29 Oct 2026 17:47:13 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 08DB043E5C; Thu, 29 Oct 2026 17:47:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38FBB1F01816; Thu, 29 Oct 2026 17:47:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793296032; bh=J/TblnclnFoCka+GHUfBxKb2uy4EUXad9o50TA7nORg=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=kcRnpPJDPNH/Ew7RxOhmUgl2lCv88KchSLZGjH9sV43pz50vCQ3uXwYrDpzWiBDus jkc7Z1Vx/bs04C9iEXjYHuyfSo9wcZ4mILv0m4M2cB5/oTGEFXOdgY0YCmk5nvzMGM gUEoVR5YPHfUAMrYVNdMoFsMzmoW4EsLpFvLfNxPf5fvQGTzGI5gn5vZIj3cz2+zC4 wC3+fhrrtjZ0x1kSvKX6vEjqW3QVi89zJ7/0tZilHbWdBB56bKeduLbV/V6iH1Kc/D I799pSlNlBqS7f/7YpeObZ4Si/+YKHTWdt2ofNVNcXDL/qM+GiZEXmN8D35n4dBgay 5BWeitw5lRnHg== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v6 1/8] efi: Pass KHO state to the next kernel in a configuration table To: "George Guo" , rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, chenhuacai@kernel.org, ardb@kernel.org, shuah@kernel.org Cc: ilias.apalodimas@linaro.org, akpm@linux-foundation.org, baoquan.he@linux.dev, ruirui.yang@linux.dev, guodongtai@kylinos.cn, kernel@xen0n.name, graf@amazon.com, liukexin@kylinos.cn, kexec@lists.infradead.org In-Reply-To: <20261029172956.20791-2-dongtai.guo@linux.dev> References: <20261029172956.20791-1-dongtai.guo@linux.dev> <20261029172956.20791-2-dongtai.guo@linux.dev> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 29 Oct 2026 17:47:11 +0000 X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Sender: "kexec" X-Spam-Status: No, score=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 X-Archived-By: > From: George Guo >=20 > KHO has to give the next kernel two addresses: the KHO FDT and the > bootmem area list. arm64 and riscv put them under /chosen in the boot > FDT. LoongArch systems booting with EFI and ACPI do not require a boot > FDT, so KHO needs another way to pass this information. >=20 > Add a Linux EFI configuration table for them, under > LINUX_EFI_KEXEC_HANDOVER_GUID. It points to a struct linux_efi_kho_data. >=20 > - On a cold boot, the LoongArch EFI stub installs the table, zeroed. > Each kexec'd kernel is given the same EFI system table, so it finds > the same table. >=20 > - In early boot, efi_config_parse_tables() reserves the table so > neither the page allocator nor kexec segments use it, and calls > kho_populate() if the table holds KHO state. >=20 > - Provide efi_kho_update() to update the table before kexec. Map the > table during boot so updates do not require allocation or mapping > at panic time. >=20 > - efi_kho_table_found() tells architecture code whether the table was > found at boot, so it can turn KHO off when the table is missing. >=20 > Only the LoongArch stub installs the table, and only with > CONFIG_KEXEC_HANDOVER. Elsewhere there is no table and this code does > nothing. >=20 > Signed-off-by: George Guo Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261029172956.2079= 1-1-dongtai.guo@linux.dev?part=3D1