From patchwork Thu Dec 17 17:37:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lakshmi Ramasubramanian X-Patchwork-Id: 11980355 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 92146C2BBCA for ; Thu, 17 Dec 2020 17:38:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 679F0235DD for ; Thu, 17 Dec 2020 17:38:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729151AbgLQRiF (ORCPT ); Thu, 17 Dec 2020 12:38:05 -0500 Received: from linux.microsoft.com ([13.77.154.182]:52032 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728707AbgLQRh4 (ORCPT ); Thu, 17 Dec 2020 12:37:56 -0500 Received: from localhost.localdomain (c-73-42-176-67.hsd1.wa.comcast.net [73.42.176.67]) by linux.microsoft.com (Postfix) with ESMTPSA id 4C03820B7189; Thu, 17 Dec 2020 09:37:15 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 4C03820B7189 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1608226635; bh=9Lk1fz7t188AYsAzmyufdPIlfAK/H2affdeV0+ugZM4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QpqNIqyDCTmUJKDOIB/d/ptR06MKyjLd3BlMZ5bPQeSs/B6mwiX4A02SSoS3gTB+x p9dws95cuvubFcOJfIaAoLCkbJNfYZJt0DcLrBW96wxlG3a7Sfl/qOO9W/pqSb1Mnk UfaCfP7aYzMObVyqZP5ZsJttgURagbk7VcFTsrmw= From: Lakshmi Ramasubramanian To: zohar@linux.ibm.com, bauerman@linux.ibm.com, robh@kernel.org, takahiro.akashi@linaro.org, gregkh@linuxfoundation.org, will@kernel.org, catalin.marinas@arm.com, mpe@ellerman.id.au Cc: =james.morse@arm.com, sashal@kernel.org, benh@kernel.crashing.org, paulus@samba.org, frowand.list@gmail.com, vincenzo.frascino@arm.com, mark.rutland@arm.com, dmitry.kasatkin@gmail.com, jmorris@namei.org, serge@hallyn.com, pasha.tatashin@soleen.com, allison@lohutok.net, masahiroy@kernel.org, bhsharma@redhat.com, mbrugger@suse.com, hsinyi@chromium.org, tao.li@vivo.com, christophe.leroy@c-s.fr, prsriva@linux.microsoft.com, balajib@linux.microsoft.com, linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org Subject: [PATCH v12 4/4] arm64: Add IMA log information in kimage used for kexec Date: Thu, 17 Dec 2020 09:37:08 -0800 Message-Id: <20201217173708.6940-5-nramas@linux.microsoft.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201217173708.6940-1-nramas@linux.microsoft.com> References: <20201217173708.6940-1-nramas@linux.microsoft.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org Address and size of the buffer containing the IMA measurement log need to be passed from the current kernel to the next kernel on kexec. Any existing "linux,ima-kexec-buffer" property in the device tree needs to be removed and its corresponding memory reservation in the currently running kernel needs to be freed. The address and size of the current kernel's IMA measurement log need to be added to the device tree's IMA kexec buffer node and memory for the buffer needs to be reserved for the log to be carried over to the next kernel on the kexec call. Add address and size fields to "struct kimage_arch" for ARM64 platform to hold the address and size of the IMA measurement log buffer. Remove any existing "linux,ima-kexec-buffer" property in the device tree and free the corresponding memory reservation in the currently running kernel. Add "linux,ima-kexec-buffer" property to the device tree and reserve the memory for storing the IMA log that needs to be passed from the current kernel to the next one. Update CONFIG_KEXEC_FILE to select CONFIG_HAVE_IMA_KEXEC to indicate that the IMA measurement log information is present in the device tree for ARM64. Signed-off-by: Lakshmi Ramasubramanian --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/kexec.h | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1d466addb078..c85d18b1f2fd 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1094,6 +1094,7 @@ config KEXEC config KEXEC_FILE bool "kexec file based system call" select KEXEC_CORE + select HAVE_IMA_KEXEC help This is new version of kexec system call. This system call is file based and takes file descriptors as system call argument diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h index d24b527e8c00..2bd19ccb6c43 100644 --- a/arch/arm64/include/asm/kexec.h +++ b/arch/arm64/include/asm/kexec.h @@ -100,6 +100,11 @@ struct kimage_arch { void *elf_headers; unsigned long elf_headers_mem; unsigned long elf_headers_sz; + +#ifdef CONFIG_IMA_KEXEC + phys_addr_t ima_buffer_addr; + size_t ima_buffer_size; +#endif }; extern const struct kexec_file_ops kexec_image_ops;