From patchwork Tue Feb 9 18:21:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lakshmi Ramasubramanian X-Patchwork-Id: 12078843 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=-26.3 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 861F8C433DB for ; Tue, 9 Feb 2021 18:41:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4B24264DF2 for ; Tue, 9 Feb 2021 18:41:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233481AbhBISjv (ORCPT ); Tue, 9 Feb 2021 13:39:51 -0500 Received: from linux.microsoft.com ([13.77.154.182]:58442 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233426AbhBIS1l (ORCPT ); Tue, 9 Feb 2021 13:27:41 -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 315AE20B57A2; Tue, 9 Feb 2021 10:22:32 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 315AE20B57A2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1612894952; bh=gAtuZsBcO2vXqFiI6uHmbmNO+jCXKZYLafO4CGNYZ8M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PNCsLI29Bgk+GW590E/SBoknj9Nt1Pgt3YriZ50tnmyndfbu295SSbQBFW8TW+/d2 RlMGxwCjlj6ranFsa8tjATmsRMgMPxdrAZBwKiuMTBFh7nCKFFE5eKv425xI3Xzaac xoJGUbWjH3cEab1mf7AuSn8D71lAto177pH8QgPI= 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, joe@perches.com, 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, 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, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v17 05/10] powerpc: Move ima buffer fields to struct kimage Date: Tue, 9 Feb 2021 10:21:55 -0800 Message-Id: <20210209182200.30606-6-nramas@linux.microsoft.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210209182200.30606-1-nramas@linux.microsoft.com> References: <20210209182200.30606-1-nramas@linux.microsoft.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org The fields ima_buffer_addr and ima_buffer_size in "struct kimage_arch" for powerpc are used to carry forward the IMA measurement list across kexec system call. These fields are not architecture specific, but are currently limited to powerpc. arch_ima_add_kexec_buffer() defined in "arch/powerpc/kexec/ima.c" sets ima_buffer_addr and ima_buffer_size for the kexec system call. This function does not have architecture specific code, but is currently limited to powerpc. Move ima_buffer_addr and ima_buffer_size to "struct kimage". Rename arch_ima_add_kexec_buffer() to of_ima_add_kexec_buffer() and move it in drivers/of/kexec.c. Co-developed-by: Prakhar Srivastava Signed-off-by: Prakhar Srivastava Signed-off-by: Lakshmi Ramasubramanian Suggested-by: Will Deacon --- arch/powerpc/include/asm/ima.h | 3 --- arch/powerpc/include/asm/kexec.h | 5 ----- arch/powerpc/kexec/ima.c | 29 ++++++----------------------- drivers/of/kexec.c | 23 +++++++++++++++++++++++ include/linux/kexec.h | 3 +++ include/linux/of.h | 5 +++++ security/integrity/ima/ima_kexec.c | 3 ++- 7 files changed, 39 insertions(+), 32 deletions(-) diff --git a/arch/powerpc/include/asm/ima.h b/arch/powerpc/include/asm/ima.h index ead488cf3981..51f64fd06c19 100644 --- a/arch/powerpc/include/asm/ima.h +++ b/arch/powerpc/include/asm/ima.h @@ -14,9 +14,6 @@ static inline void remove_ima_buffer(void *fdt, int chosen_node) {} #endif #ifdef CONFIG_IMA_KEXEC -int arch_ima_add_kexec_buffer(struct kimage *image, unsigned long load_addr, - size_t size); - int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node); #else static inline int setup_ima_buffer(const struct kimage *image, void *fdt, diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h index bdd0ddb9ac4d..ecf88533d6b4 100644 --- a/arch/powerpc/include/asm/kexec.h +++ b/arch/powerpc/include/asm/kexec.h @@ -112,11 +112,6 @@ struct kimage_arch { unsigned long elf_headers_sz; void *elf_headers; void *fdt; - -#ifdef CONFIG_IMA_KEXEC - phys_addr_t ima_buffer_addr; - size_t ima_buffer_size; -#endif }; char *setup_kdump_cmdline(struct kimage *image, char *cmdline, diff --git a/arch/powerpc/kexec/ima.c b/arch/powerpc/kexec/ima.c index 720e50e490b6..ed38125e2f87 100644 --- a/arch/powerpc/kexec/ima.c +++ b/arch/powerpc/kexec/ima.c @@ -128,23 +128,6 @@ void remove_ima_buffer(void *fdt, int chosen_node) } #ifdef CONFIG_IMA_KEXEC -/** - * arch_ima_add_kexec_buffer - do arch-specific steps to add the IMA buffer - * - * Architectures should use this function to pass on the IMA buffer - * information to the next kernel. - * - * Return: 0 on success, negative errno on error. - */ -int arch_ima_add_kexec_buffer(struct kimage *image, unsigned long load_addr, - size_t size) -{ - image->arch.ima_buffer_addr = load_addr; - image->arch.ima_buffer_size = size; - - return 0; -} - static int write_number(void *p, u64 value, int cells) { if (cells == 1) { @@ -180,7 +163,7 @@ int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node) u8 value[16]; remove_ima_buffer(fdt, chosen_node); - if (!image->arch.ima_buffer_size) + if (!image->ima_buffer_size) return 0; ret = get_addr_size_cells(&addr_cells, &size_cells); @@ -192,11 +175,11 @@ int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node) if (entry_size > sizeof(value)) return -EINVAL; - ret = write_number(value, image->arch.ima_buffer_addr, addr_cells); + ret = write_number(value, image->ima_buffer_addr, addr_cells); if (ret) return ret; - ret = write_number(value + 4 * addr_cells, image->arch.ima_buffer_size, + ret = write_number(value + 4 * addr_cells, image->ima_buffer_size, size_cells); if (ret) return ret; @@ -206,13 +189,13 @@ int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node) if (ret < 0) return -EINVAL; - ret = fdt_add_mem_rsv(fdt, image->arch.ima_buffer_addr, - image->arch.ima_buffer_size); + ret = fdt_add_mem_rsv(fdt, image->ima_buffer_addr, + image->ima_buffer_size); if (ret) return -EINVAL; pr_debug("IMA buffer at 0x%llx, size = 0x%zx\n", - image->arch.ima_buffer_addr, image->arch.ima_buffer_size); + image->ima_buffer_addr, image->ima_buffer_size); return 0; } diff --git a/drivers/of/kexec.c b/drivers/of/kexec.c index 469e09613cdd..9f33d215b9f2 100644 --- a/drivers/of/kexec.c +++ b/drivers/of/kexec.c @@ -63,6 +63,29 @@ static int fdt_find_and_del_mem_rsv(void *fdt, unsigned long start, unsigned lon return -ENOENT; } +#ifdef CONFIG_IMA_KEXEC +/** + * of_ima_add_kexec_buffer - Add IMA buffer for next kernel + * + * @image: kimage struct to set IMA buffer data + * @load_addr: Starting address where IMA buffer is loaded at + * @size: Number of bytes in the IMA buffer + * + * Use this function to pass on the IMA buffer information to + * the next kernel across kexec system call. + * + * Return: 0 on success, negative errno on error. + */ +int of_ima_add_kexec_buffer(struct kimage *image, + unsigned long load_addr, size_t size) +{ + image->ima_buffer_addr = load_addr; + image->ima_buffer_size = size; + + return 0; +} +#endif /* CONFIG_IMA_KEXEC */ + /* * of_kexec_alloc_and_setup_fdt - Alloc and setup a new Flattened Device Tree * diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 5f61389f5f36..75c670f0dfbb 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -304,6 +304,9 @@ struct kimage { #ifdef CONFIG_IMA_KEXEC /* Virtual address of IMA measurement buffer for kexec syscall */ void *ima_buffer; + + phys_addr_t ima_buffer_addr; + size_t ima_buffer_size; #endif }; diff --git a/include/linux/of.h b/include/linux/of.h index f0eff5e84353..03e0e694be29 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -573,6 +573,11 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image, unsigned long initrd_len, const char *cmdline); +#ifdef CONFIG_IMA_KEXEC +int of_ima_add_kexec_buffer(struct kimage *image, + unsigned long load_addr, size_t size); +#endif /* CONFIG_IMA_KEXEC */ + #else /* CONFIG_OF */ static inline void of_core_init(void) diff --git a/security/integrity/ima/ima_kexec.c b/security/integrity/ima/ima_kexec.c index e29bea3dd4cc..d346eed2d236 100644 --- a/security/integrity/ima/ima_kexec.c +++ b/security/integrity/ima/ima_kexec.c @@ -10,6 +10,7 @@ #include #include #include +#include #include "ima.h" #ifdef CONFIG_IMA_KEXEC @@ -123,7 +124,7 @@ void ima_add_kexec_buffer(struct kimage *image) return; } - ret = arch_ima_add_kexec_buffer(image, kbuf.mem, kexec_segment_size); + ret = of_ima_add_kexec_buffer(image, kbuf.mem, kexec_segment_size); if (ret) { pr_err("Error passing over kexec measurement buffer.\n"); return;