From patchwork Tue Apr 2 08:28:56 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Cl=C3=A9ment_Leger?= X-Patchwork-Id: 10881237 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EF5A71669 for ; Tue, 2 Apr 2019 08:29:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D7846288AC for ; Tue, 2 Apr 2019 08:29:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CB6FE288B6; Tue, 2 Apr 2019 08:29:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ADA7B288AC for ; Tue, 2 Apr 2019 08:29:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726558AbfDBI3A (ORCPT ); Tue, 2 Apr 2019 04:29:00 -0400 Received: from zimbra2.kalray.eu ([92.103.151.219]:51546 "EHLO zimbra2.kalray.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725884AbfDBI3A (ORCPT ); Tue, 2 Apr 2019 04:29:00 -0400 Received: from localhost (localhost [127.0.0.1]) by zimbra2.kalray.eu (Postfix) with ESMTP id B9F0C27E042C; Tue, 2 Apr 2019 10:28:57 +0200 (CEST) Received: from zimbra2.kalray.eu ([127.0.0.1]) by localhost (zimbra2.kalray.eu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id L-zePF1AiWSo; Tue, 2 Apr 2019 10:28:57 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zimbra2.kalray.eu (Postfix) with ESMTP id EF89A27E042B; Tue, 2 Apr 2019 10:28:56 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.10.3 zimbra2.kalray.eu EF89A27E042B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kalray.eu; s=32AE1B44-9502-11E5-BA35-3734643DEF29; t=1554193737; bh=1eL/MRneVDeVY/p4LvoXphvR0XpBKq1yjp8BOZveExE=; h=Date:From:To:Message-ID:MIME-Version; b=cpPm+jrvHUR2xdW37MKK5jj4GVEm70lOoaV9mnIniO0tYwmi+nA74CHtX/XSuxhkQ zDtTZw1en8s78upr9ZZE7AFUNo8/fs4IgoxBOq4+4/qX6mnmu3mTJingRhN4NK7/Vi InAdWnmHhn/hCVZNRsL2EAxNJAic/u+YMfUhqhNU= X-Virus-Scanned: amavisd-new at zimbra2.kalray.eu Received: from zimbra2.kalray.eu ([127.0.0.1]) by localhost (zimbra2.kalray.eu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id hMmTZ-mEW7kX; Tue, 2 Apr 2019 10:28:56 +0200 (CEST) Received: from zimbra2.kalray.eu (zimbra2.kalray.eu [192.168.40.202]) by zimbra2.kalray.eu (Postfix) with ESMTP id D280B27E042A; Tue, 2 Apr 2019 10:28:56 +0200 (CEST) Date: Tue, 2 Apr 2019 10:28:56 +0200 (CEST) From: =?utf-8?q?Cl=C3=A9ment?= Leger To: linux-remoteproc , Ohad Ben-Cohen , Bjorn Andersson Cc: Loic PALLARDY Message-ID: <200341833.8193594.1554193736818.JavaMail.zimbra@kalray.eu> Subject: [RFC PATCH] rproc: Add elf64 support in elf loader MIME-Version: 1.0 X-Originating-IP: [192.168.40.202] X-Mailer: Zimbra 8.8.11_GA_3780 (ZimbraWebClient - GC71 (Linux)/8.8.11_GA_3787) Thread-Index: BEkhkMiGOnBSYshE/E2mIgycfVYDcg== Thread-Topic: rproc: Add elf64 support in elf loader Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP elf32 and elf64 mainly differ by their types. In order to avoid copy/pasting the whole loader code, generate static inline functions which will access values according to the elf class. It allows to keep a common loader basis. In order to accomodate both elf types sizes, the maximum size for a elf header member is chosen using the maximum value of both elf class. Signed-off-by: Clement Leger Signed-off-by: Clement Leger Tested-by: Arnaud POULIQUEN --- drivers/remoteproc/remoteproc_elf_loader.c | 130 +++++++++++++++++------------ drivers/remoteproc/remoteproc_elf_loader.h | 78 +++++++++++++++++ drivers/remoteproc/remoteproc_internal.h | 2 +- include/linux/remoteproc.h | 4 +- 4 files changed, 159 insertions(+), 55 deletions(-) create mode 100644 drivers/remoteproc/remoteproc_elf_loader.h diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c index b17d72ec8603..f6aefa46e45c 100644 --- a/drivers/remoteproc/remoteproc_elf_loader.c +++ b/drivers/remoteproc/remoteproc_elf_loader.c @@ -31,6 +31,7 @@ #include #include "remoteproc_internal.h" +#include "remoteproc_elf_loader.h" /** * rproc_elf_sanity_check() - Sanity Check ELF firmware image @@ -44,7 +45,10 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) const char *name = rproc->firmware; struct device *dev = &rproc->dev; struct elf32_hdr *ehdr; + u32 elf_shdr_size; + u64 phoff, shoff; char class; + u16 phnum; if (!fw) { dev_err(dev, "failed to load %s\n", name); @@ -58,9 +62,13 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) ehdr = (struct elf32_hdr *)fw->data; - /* We only support ELF32 at this point */ + if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { + dev_err(dev, "Image is corrupted (bad magic)\n"); + return -EINVAL; + } + class = ehdr->e_ident[EI_CLASS]; - if (class != ELFCLASS32) { + if (class != ELFCLASS32 && class != ELFCLASS64) { dev_err(dev, "Unsupported class: %d\n", class); return -EINVAL; } @@ -75,26 +83,29 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) return -EINVAL; } - if (fw->size < ehdr->e_shoff + sizeof(struct elf32_shdr)) { - dev_err(dev, "Image is too small\n"); - return -EINVAL; - } + phoff = elf_hdr_e_phoff(class, fw->data); + shoff = elf_hdr_e_shoff(class, fw->data); + phnum = elf_hdr_e_phnum(class, fw->data); + elf_shdr_size = elf_size_of_shdr(class); - if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { - dev_err(dev, "Image is corrupted (bad magic)\n"); + if (fw->size < shoff + elf_shdr_size) { + dev_err(dev, "Image is too small\n"); return -EINVAL; } - if (ehdr->e_phnum == 0) { + if (phnum == 0) { dev_err(dev, "No loadable segments\n"); return -EINVAL; } - if (ehdr->e_phoff > fw->size) { + if (phoff > fw->size) { dev_err(dev, "Firmware size is too small\n"); return -EINVAL; } + dev_dbg(dev, "Firmware is an elf%d file\n", + class == ELFCLASS32 ? 32 : 64); + return 0; } EXPORT_SYMBOL(rproc_elf_sanity_check); @@ -110,11 +121,9 @@ EXPORT_SYMBOL(rproc_elf_sanity_check); * Note that the boot address is not a configurable property of all remote * processors. Some will always boot at a specific hard-coded address. */ -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw) +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw) { - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; - - return ehdr->e_entry; + return elf_hdr_e_entry(fw_elf_get_class(fw), fw->data); } EXPORT_SYMBOL(rproc_elf_get_boot_addr); @@ -145,37 +154,41 @@ EXPORT_SYMBOL(rproc_elf_get_boot_addr); int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) { struct device *dev = &rproc->dev; - struct elf32_hdr *ehdr; - struct elf32_phdr *phdr; + const void *ehdr, *phdr; int i, ret = 0; + u16 phnum; const u8 *elf_data = fw->data; + u8 class = fw_elf_get_class(fw); + u32 elf_phdr_size = elf_size_of_phdr(class); - ehdr = (struct elf32_hdr *)elf_data; - phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff); + ehdr = elf_data; + phnum = elf_hdr_e_phnum(class, ehdr); + phdr = elf_data + elf_hdr_e_phoff(class, ehdr); /* go through the available ELF segments */ - for (i = 0; i < ehdr->e_phnum; i++, phdr++) { - u32 da = phdr->p_paddr; - u32 memsz = phdr->p_memsz; - u32 filesz = phdr->p_filesz; - u32 offset = phdr->p_offset; + for (i = 0; i < phnum; i++, phdr += elf_phdr_size) { + u64 da = elf_phdr_p_paddr(class, phdr); + u64 memsz = elf_phdr_p_memsz(class, phdr); + u64 filesz = elf_phdr_p_filesz(class, phdr); + u64 offset = elf_phdr_p_offset(class, phdr); + u32 type = elf_phdr_p_type(class, phdr); void *ptr; - if (phdr->p_type != PT_LOAD) + if (type != PT_LOAD) continue; - dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n", - phdr->p_type, da, memsz, filesz); + dev_dbg(dev, "phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n", + type, da, memsz, filesz); if (filesz > memsz) { - dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n", + dev_err(dev, "bad phdr filesz 0x%llx memsz 0x%llx\n", filesz, memsz); ret = -EINVAL; break; } if (offset + filesz > fw->size) { - dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n", + dev_err(dev, "truncated fw: need 0x%llx avail 0x%zx\n", offset + filesz, fw->size); ret = -EINVAL; break; @@ -184,14 +197,15 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) /* grab the kernel address for this device address */ ptr = rproc_da_to_va(rproc, da, memsz); if (!ptr) { - dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz); + dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da, + memsz); ret = -EINVAL; break; } /* put the segment where the remote processor expects it */ - if (phdr->p_filesz) - memcpy(ptr, elf_data + phdr->p_offset, filesz); + if (filesz) + memcpy(ptr, elf_data + offset, filesz); /* * Zero out remaining memory for this segment. @@ -208,24 +222,32 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) } EXPORT_SYMBOL(rproc_elf_load_segments); -static struct elf32_shdr * -find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size) +static const void * +find_table(struct device *dev, const struct firmware *fw) { - struct elf32_shdr *shdr; + const void *shdr, *name_table_shdr; int i; const char *name_table; struct resource_table *table = NULL; - const u8 *elf_data = (void *)ehdr; + const u8 *elf_data = (void *)fw->data; + u8 class = fw_elf_get_class(fw); + size_t fw_size = fw->size; + const void *ehdr = elf_data; + u16 shnum = elf_hdr_e_shnum(class, ehdr); + u32 elf_shdr_size = elf_size_of_shdr(class); + u16 shstrndx = elf_hdr_e_shstrndx(class, ehdr); /* look for the resource table and handle it */ - shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff); - name_table = elf_data + shdr[ehdr->e_shstrndx].sh_offset; + shdr = elf_data + elf_hdr_e_shoff(class, ehdr); + name_table_shdr = shdr + (shstrndx * elf_shdr_size); + name_table = elf_data + elf_shdr_sh_offset(class, name_table_shdr); - for (i = 0; i < ehdr->e_shnum; i++, shdr++) { - u32 size = shdr->sh_size; - u32 offset = shdr->sh_offset; + for (i = 0; i < shnum; i++, shdr += elf_shdr_size) { + u64 size = elf_shdr_sh_size(class, shdr); + u64 offset = elf_shdr_sh_offset(class, shdr); + u32 name = elf_shdr_sh_name(class, shdr); - if (strcmp(name_table + shdr->sh_name, ".resource_table")) + if (strcmp(name_table + name, ".resource_table")) continue; table = (struct resource_table *)(elf_data + offset); @@ -279,21 +301,21 @@ find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size) */ int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw) { - struct elf32_hdr *ehdr; - struct elf32_shdr *shdr; + const void *shdr; struct device *dev = &rproc->dev; struct resource_table *table = NULL; const u8 *elf_data = fw->data; size_t tablesz; + u8 class = fw_elf_get_class(fw); + u64 sh_offset; - ehdr = (struct elf32_hdr *)elf_data; - - shdr = find_table(dev, ehdr, fw->size); + shdr = find_table(dev, fw); if (!shdr) return -EINVAL; - table = (struct resource_table *)(elf_data + shdr->sh_offset); - tablesz = shdr->sh_size; + sh_offset = elf_shdr_sh_offset(class, shdr); + table = (struct resource_table *)(elf_data + sh_offset); + tablesz = elf_shdr_sh_size(class, shdr); /* * Create a copy of the resource table. When a virtio device starts @@ -326,13 +348,17 @@ EXPORT_SYMBOL(rproc_elf_load_rsc_table); struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw) { - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; - struct elf32_shdr *shdr; + const void *shdr; + u64 sh_addr, sh_size; + u8 class = fw_elf_get_class(fw); - shdr = find_table(&rproc->dev, ehdr, fw->size); + shdr = find_table(&rproc->dev, fw); if (!shdr) return NULL; - return rproc_da_to_va(rproc, shdr->sh_addr, shdr->sh_size); + sh_addr = elf_shdr_sh_addr(class, shdr); + sh_size = elf_shdr_sh_size(class, shdr); + + return rproc_da_to_va(rproc, sh_addr, sh_size); } EXPORT_SYMBOL(rproc_elf_find_loaded_rsc_table); diff --git a/drivers/remoteproc/remoteproc_elf_loader.h b/drivers/remoteproc/remoteproc_elf_loader.h new file mode 100644 index 000000000000..e37a55c61eae --- /dev/null +++ b/drivers/remoteproc/remoteproc_elf_loader.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Remote processor elf loader defines + * + * Copyright (C) 2019 Kalray, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef REMOTEPROC_ELF_LOADER_H +#define REMOTEPROC_ELF_LOADER_H + +#include +#include + +/** + * fw_elf_get_class - Get elf class + * @fw: the ELF firmware image + * + * Note that we use and elf32_hdr to access the class since the start of the + * struct is the same for both elf class + * + * Return: elf class of the firmware + */ +static inline u8 fw_elf_get_class(const struct firmware *fw) +{ + struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; + + return ehdr->e_ident[EI_CLASS]; +} + +#define ELF_GET_FIELD(__s, __field, __type) \ +static inline __type elf_##__s##_##__field(u8 class, const void *arg) \ +{ \ + if (class == ELFCLASS32) \ + return (__type) ((const struct elf32_##__s *) arg)->__field; \ + else \ + return (__type) ((const struct elf64_##__s *) arg)->__field; \ +} + +ELF_GET_FIELD(hdr, e_entry, u64) +ELF_GET_FIELD(hdr, e_phnum, u16) +ELF_GET_FIELD(hdr, e_shnum, u16) +ELF_GET_FIELD(hdr, e_phoff, u64) +ELF_GET_FIELD(hdr, e_shoff, u64) +ELF_GET_FIELD(hdr, e_shstrndx, u16) + +ELF_GET_FIELD(phdr, p_paddr, u64) +ELF_GET_FIELD(phdr, p_filesz, u64) +ELF_GET_FIELD(phdr, p_memsz, u64) +ELF_GET_FIELD(phdr, p_type, u32) +ELF_GET_FIELD(phdr, p_offset, u64) + +ELF_GET_FIELD(shdr, sh_size, u64) +ELF_GET_FIELD(shdr, sh_offset, u64) +ELF_GET_FIELD(shdr, sh_name, u32) +ELF_GET_FIELD(shdr, sh_addr, u64) + +#define ELF_STRUCT_SIZE(__s) \ +static inline unsigned long elf_size_of_##__s(u8 class) \ +{ \ + if (class == ELFCLASS32)\ + return sizeof(struct elf32_##__s); \ + else \ + return sizeof(struct elf64_##__s); \ +} + +ELF_STRUCT_SIZE(shdr) +ELF_STRUCT_SIZE(phdr) + +#endif /* REMOTEPROC_ELF_LOADER_H */ diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h index b02b15f74a5e..6d4a5ffcb28b 100644 --- a/drivers/remoteproc/remoteproc_internal.h +++ b/drivers/remoteproc/remoteproc_internal.h @@ -55,7 +55,7 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, int len); int rproc_trigger_recovery(struct rproc *rproc); int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw); -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw); +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw); int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw); int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw); struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index a3edd981220e..9a7c4c3f1c92 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -381,7 +381,7 @@ struct rproc_ops { struct rproc *rproc, const struct firmware *fw); int (*load)(struct rproc *rproc, const struct firmware *fw); int (*sanity_check)(struct rproc *rproc, const struct firmware *fw); - u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); + u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); }; /** @@ -497,7 +497,7 @@ struct rproc { int num_traces; struct list_head carveouts; struct list_head mappings; - u32 bootaddr; + u64 bootaddr; struct list_head rvdevs; struct list_head subdevs; struct idr notifyids;