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 AC657606A31A for ; Sun, 25 Oct 2026 17:57:10 +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=PykdQOHz; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=oymLPXF6 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:To:Subject:From :Message-ID:Cc:MIME-Version:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; 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Sun, 25 Oct 2026 17:57:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792951028; bh=lKmk6tLv6L2dAKAc8GVLYo9OEWkc9cBlXHb/4fkDSnM=; h=From:Subject:Reply-To:To:In-Reply-To:References:Date; b=oymLPXF6/ZNIhs+CrOQtaXVKVyberOi04NMOL+efrvecUTHfKhtfWqA4PSKYSiNsq Yt+fGJ1K9VsZ4+oTVw8Rh7RssBpXCM+/5eh5jc+7yRHmfeiaf8A+Lauc+rKfBm7JBf kqYekh2kUDLiL9IWVvgf45Vrp3RbBds0bkdPiymJ1tZe7NCS22oo05UoWH7yoI781a JUF3YZA3M7l+BE49YdN523geQs9ITU58iMt9/BsVPg+Hwg786E1GqJo2uj/UpCZM2+ NbM0PchK+5alBYNWz+JfwV5Tpv+9AeOPrJLG0B9bvXQCD5Wd1FPFXHMNoOeOnyweHp rzTNk5Dq3vHSg== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 9/9] selftests: kho: add read-only KHO test to vmtest.sh To: "Pasha Tatashin" , rppt@kernel.org, kuba@kernel.org, enelsonmoore@gmail.com, bp@alien8.de, shuah@kernel.org, david@kernel.org, akpm@linux-foundation.org, ljs@kernel.org, mhocko@suse.com, skhan@linuxfoundation.org, vbabka@kernel.org, dapeng1.mi@linux.intel.com, corbet@lwn.net, surenb@google.com, kexec@lists.infradead.org, pratyush@kernel.org, rdunlap@infradead.org, elver@google.com, graf@amazon.com, lirongqing@baidu.com, liam@infradead.org, jlayton@kernel.org In-Reply-To: <20261025174017.3870481-10-pasha.tatashin@soleen.com> References: <20261025174017.3870481-1-pasha.tatashin@soleen.com> <20261025174017.3870481-10-pasha.tatashin@soleen.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Sun, 25 Oct 2026 17:57:07 +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=-8.2 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,LOTS_OF_MONEY, 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: > vmtest.sh currently only tests standard KHO restoration and does not > exercise read-only KHO mode ('kho_ro=3D') in QEMU. >=20 > Extend tools/testing/selftests/kho/vmtest.sh and init.c to enable both > CONFIG_KEXEC_HANDOVER=3Dy and CONFIG_KEXEC_HANDOVER_READONLY=3Dy in the > kernel configuration and run a second QEMU test verifying read-only KHO > after the standard KHO test on both x86_64 and aarch64: >=20 > - Enable CONFIG_KEXEC_HANDOVER_READONLY=3Dy alongside > CONFIG_KEXEC_HANDOVER=3Dy in build_kernel(). > - Pass KHO_RO_CMDLINE ('nokaslr kho_bootmem=3D64M,64M,64M' on x86_64) to > the first kernel in the read-only test run and configure 4G of RAM on > aarch64 so GFP_KERNEL KHO allocations are placed in ZONE_NORMAL above > 4G, outside the read-only kernel's System RAM. > - When booted with 'kho_ro_test', read /debugfs/kho/out/fdt_phys in > init.c and kexec into the target kernel with 'kho_ro=3D' and > architecture-specific memory parameters > ('memmap=3D792M$16M memmap=3D24M$1000M' on x86_64, 'mem=3D128M' on aarc= h64) > so the preserved pages are excluded from the boot memory map and > mapped via kho_ro_map_folio(). > - Verify 'KHO restore succeeded' from test_kho in read-only mode. >=20 > Signed-off-by: Pasha Tatashin Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261025174017.3870= 481-1-pasha.tatashin@soleen.com?part=3D9