From patchwork Wed Jan 6 21:23:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Siddharth Gupta X-Patchwork-Id: 12002303 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 1F0FEC4332D for ; Wed, 6 Jan 2021 21:24:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EC4312336F for ; Wed, 6 Jan 2021 21:24:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726688AbhAFVYn (ORCPT ); Wed, 6 Jan 2021 16:24:43 -0500 Received: from m43-15.mailgun.net ([69.72.43.15]:61815 "EHLO m43-15.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725815AbhAFVYn (ORCPT ); Wed, 6 Jan 2021 16:24:43 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1609968260; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=4TYWfsSk+aG1z3XPwo/hidVUb383BnbZ9LPVZgIeQqE=; b=YAgCVT5c5jINWZjr8OryZPCkP6sK+AHuHuQvUHlYeN94+284jPeALtasDPAXxjzXGW63oTvI CQs53Tm+Ppb3XOzcvNPjcMBIVC6g84JDeH3zkIOBc2BlOtEXbv8DnYF1pEDmtg/b+sjVbYf8 zljdspHvuPjwOEBG7dSJlIJ6xBE= X-Mailgun-Sending-Ip: 69.72.43.15 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n01.prod.us-west-2.postgun.com with SMTP id 5ff62a62b95fc5932662053d (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 06 Jan 2021 21:23:46 GMT Sender: sidgup=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 877EDC43463; Wed, 6 Jan 2021 21:23:46 +0000 (UTC) Received: from sidgup-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: sidgup) by smtp.codeaurora.org (Postfix) with ESMTPSA id 7AFF9C43464; Wed, 6 Jan 2021 21:23:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 7AFF9C43464 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=sidgup@codeaurora.org From: Siddharth Gupta To: bjorn.andersson@linaro.org, agross@kernel.org, ohad@wizery.com, linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Siddharth Gupta , psodagud@codeaurora.org, rishabhb@codeaurora.org Subject: [PATCH 2/3] soc: qcom: mdt_loader: Handle split bins correctly Date: Wed, 6 Jan 2021 13:23:30 -0800 Message-Id: <1609968211-7579-3-git-send-email-sidgup@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1609968211-7579-1-git-send-email-sidgup@codeaurora.org> References: <1609968211-7579-1-git-send-email-sidgup@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org It may be that the offset of the first program header lies inside the mdt's filesize, in this case the loader would incorrectly assume that the bins were not split. The loading would then continue on to fail for split bins. This change updates the logic used by the mdt loader to understand whether the firmware images are split or not. It figures this out by checking if each program header's segment lies within the file or not. Signed-off-by: Siddharth Gupta --- drivers/soc/qcom/mdt_loader.c | 60 +++++++++++++++++++++++++++---------------- 1 file changed, 38 insertions(+), 22 deletions(-) diff --git a/drivers/soc/qcom/mdt_loader.c b/drivers/soc/qcom/mdt_loader.c index 813216d..c9bbd8c 100644 --- a/drivers/soc/qcom/mdt_loader.c +++ b/drivers/soc/qcom/mdt_loader.c @@ -31,6 +31,26 @@ static bool mdt_phdr_valid(const struct elf32_phdr *phdr) return true; } +static bool qcom_mdt_bins_are_split(const struct firmware *fw) +{ + const struct elf32_phdr *phdrs; + const struct elf32_hdr *ehdr; + uint64_t seg_start, seg_end; + int i; + + ehdr = (struct elf32_hdr *)fw->data; + phdrs = (struct elf32_phdr *)(ehdr + 1); + + for (i = 0; i < ehdr->e_phnum; i++) { + seg_start = phdrs[i].p_offset; + seg_end = phdrs[i].p_offset + phdrs[i].p_filesz; + if (seg_start > fw->size || seg_end > fw->size) + return true; + } + + return false; +} + /** * qcom_mdt_get_size() - acquire size of the memory region needed to load mdt * @fw: firmware object for the mdt file @@ -118,7 +138,7 @@ void *qcom_mdt_read_metadata(const struct firmware *fw, size_t *data_len) return ERR_PTR(-ENOMEM); /* Is the header and hash already packed */ - if (ehdr_size + hash_size == fw->size) + if (qcom_mdt_bins_are_split(fw)) hash_offset = phdrs[0].p_filesz; else hash_offset = phdrs[hash_index].p_offset; @@ -150,6 +170,7 @@ static int __qcom_mdt_load(struct device *dev, const struct firmware *fw, void *metadata; char *fw_name; bool relocate = false; + bool is_split; void *ptr; int ret = 0; int i; @@ -157,6 +178,7 @@ static int __qcom_mdt_load(struct device *dev, const struct firmware *fw, if (!fw || !mem_region || !mem_phys || !mem_size) return -EINVAL; + is_split = qcom_mdt_bins_are_split(fw); ehdr = (struct elf32_hdr *)fw->data; phdrs = (struct elf32_phdr *)(ehdr + 1); @@ -238,28 +260,22 @@ static int __qcom_mdt_load(struct device *dev, const struct firmware *fw, ptr = mem_region + offset; - if (phdr->p_filesz && phdr->p_offset < fw->size) { - /* Firmware is large enough to be non-split */ - if (phdr->p_offset + phdr->p_filesz > fw->size) { - dev_err(dev, - "failed to load segment %d from truncated file %s\n", - i, firmware); - ret = -EINVAL; - break; + if (phdr->p_filesz) { + if (!is_split) { + /* Firmware is large enough to be non-split */ + memcpy(ptr, fw->data + phdr->p_offset, phdr->p_filesz); + } else { + /* Firmware not large enough, load split-out segments */ + snprintf(fw_name + fw_name_len - 3, 4, "b%02d", i); + ret = request_firmware_into_buf(&seg_fw, fw_name, dev, + ptr, phdr->p_filesz); + if (ret) { + dev_err(dev, "failed to load %s\n", fw_name); + break; + } + + release_firmware(seg_fw); } - - memcpy(ptr, fw->data + phdr->p_offset, phdr->p_filesz); - } else if (phdr->p_filesz) { - /* Firmware not large enough, load split-out segments */ - sprintf(fw_name + fw_name_len - 3, "b%02d", i); - ret = request_firmware_into_buf(&seg_fw, fw_name, dev, - ptr, phdr->p_filesz); - if (ret) { - dev_err(dev, "failed to load %s\n", fw_name); - break; - } - - release_firmware(seg_fw); } if (phdr->p_memsz > phdr->p_filesz)