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d=kalray.eu; s=32AE1B44-9502-11E5-BA35-3734643DEF29; t=1580838264; bh=8wiJQBti4vPAr2jhTr5E2seOWp5XeIkMbSxfFO5TqVI=; h=From:To:Date:Message-Id; b=P0YqHFmaJNA5Mma8FNfbnyy7NMhawB6Ddl71Y3sVRzw7AFeI5qLDyGyTEnXeffqpA aD/MNv2IuvLqzvlMUccBp7RwUdsCfHvfyX9/BP6IjSxzf6y9DgugTidFvgkwlZSD+M 3Kfn8W7nrXlDvOQ69Rbs+qIQo8OIME6dzWjTaaXM= 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 OMRxddzq87Ep; Tue, 4 Feb 2020 18:44:24 +0100 (CET) Received: from triton.lin.mbt.kalray.eu (unknown [192.168.37.25]) by zimbra2.kalray.eu (Postfix) with ESMTPSA id C231127E1660; Tue, 4 Feb 2020 18:44:24 +0100 (CET) From: Clement Leger To: Ohad Ben-Cohen , Bjorn Andersson , Jonathan Corbet , Shawn Guo , Sascha Hauer , linux-remoteproc@vger.kernel.org Subject: [PATCH v3 2/2] remoteproc: Add elf64 support in elf loader Date: Tue, 4 Feb 2020 18:44:12 +0100 Message-Id: <20200204174412.16814-3-cleger@kalray.eu> X-Mailer: git-send-email 2.15.0.276.g89ea799 In-Reply-To: <20200204174412.16814-1-cleger@kalray.eu> References: <20200129163013.GA16538@xps15> <20200204174412.16814-1-cleger@kalray.eu> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200204_094427_487035_6CA4F92D X-CRM114-Status: GOOD ( 22.33 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [92.103.151.219 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mathieu Poirier , Loic PALLARDY , linux-doc@vger.kernel.org, linux-arm-msm@vger.kernel.org, Arnaud Pouliquen , Patrice Chotard , linux-kernel@vger.kernel.org, Clement Leger , Andy Gross , NXP Linux Team , Pengutronix Kernel Team , s-anna , Fabio Estevam , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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 accommodate 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 Tested-by: Arnaud POULIQUEN --- Documentation/remoteproc.txt | 2 +- drivers/remoteproc/remoteproc_elf_loader.c | 147 ++++++++++++++++++----------- drivers/remoteproc/remoteproc_elf_loader.h | 69 ++++++++++++++ drivers/remoteproc/remoteproc_internal.h | 2 +- drivers/remoteproc/st_remoteproc.c | 2 +- include/linux/remoteproc.h | 4 +- 6 files changed, 167 insertions(+), 59 deletions(-) create mode 100644 drivers/remoteproc/remoteproc_elf_loader.h diff --git a/Documentation/remoteproc.txt b/Documentation/remoteproc.txt index 03c3d2e568b0..2be1147256e0 100644 --- a/Documentation/remoteproc.txt +++ b/Documentation/remoteproc.txt @@ -230,7 +230,7 @@ in the used rings. Binary Firmware Structure ========================= -At this point remoteproc only supports ELF32 firmware binaries. However, +At this point remoteproc supports ELF32 and ELF64 firmware binaries. However, it is quite expected that other platforms/devices which we'd want to support with this framework will be based on different binary formats. diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c index 606aae166eba..21fd2b2fe5ae 100644 --- a/drivers/remoteproc/remoteproc_elf_loader.c +++ b/drivers/remoteproc/remoteproc_elf_loader.c @@ -23,6 +23,7 @@ #include #include "remoteproc_internal.h" +#include "remoteproc_elf_loader.h" /** * rproc_elf_sanity_check() - Sanity Check ELF firmware image @@ -35,8 +36,16 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) { const char *name = rproc->firmware; struct device *dev = &rproc->dev; + /* + * Elf files are beginning with the same structure. Thus, to simplify + * header parsing, we can use the elf32_hdr one for both elf64 and + * elf32. + */ 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); @@ -50,13 +59,22 @@ 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; } + if (class == ELFCLASS64 && fw->size < sizeof(struct elf64_hdr)) { + dev_err(dev, "elf64 header is too small\n"); + return -EINVAL; + } + /* We assume the firmware has the same endianness as the host */ # ifdef __LITTLE_ENDIAN if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) { @@ -67,26 +85,29 @@ 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); @@ -102,11 +123,9 @@ 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); @@ -137,37 +156,41 @@ 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; @@ -176,14 +199,15 @@ 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. @@ -200,24 +224,35 @@ 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; - - for (i = 0; i < ehdr->e_shnum; i++, shdr++) { - u32 size = shdr->sh_size; - u32 offset = shdr->sh_offset; - - if (strcmp(name_table + shdr->sh_name, ".resource_table")) + /* First, get the section header according to the elf class */ + shdr = elf_data + elf_hdr_e_shoff(class, ehdr); + /* Compute name table section header entry in shdr array */ + name_table_shdr = shdr + (shstrndx * elf_shdr_size); + /* Finally, compute the name table section address in elf */ + name_table = elf_data + elf_shdr_sh_offset(class, name_table_shdr); + + 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 + name, ".resource_table")) continue; table = (struct resource_table *)(elf_data + offset); @@ -270,21 +305,21 @@ 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 @@ -317,13 +352,17 @@ 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..fac3565734f9 --- /dev/null +++ b/drivers/remoteproc/remoteproc_elf_loader.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Remote processor elf loader defines + * + * Copyright (C) 2019 Kalray, Inc. + */ + +#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 004867061721..eeb26434220e 100644 --- a/drivers/remoteproc/remoteproc_internal.h +++ b/drivers/remoteproc/remoteproc_internal.h @@ -55,7 +55,7 @@ phys_addr_t rproc_va_to_pa(void *cpu_addr); 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/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c index ee13d23b43a9..a3268d95a50e 100644 --- a/drivers/remoteproc/st_remoteproc.c +++ b/drivers/remoteproc/st_remoteproc.c @@ -190,7 +190,7 @@ static int st_rproc_start(struct rproc *rproc) } } - dev_info(&rproc->dev, "Started from 0x%x\n", rproc->bootaddr); + dev_info(&rproc->dev, "Started from 0x%llx\n", rproc->bootaddr); return 0; diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index f84bd5fe0211..82cebca9344c 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -382,7 +382,7 @@ 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); }; /** @@ -498,7 +498,7 @@ 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;