From patchwork Wed Jan 11 11:43:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sibi Sankar X-Patchwork-Id: 641330 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C403C54EBC for ; Wed, 11 Jan 2023 11:46:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238609AbjAKLqd (ORCPT ); Wed, 11 Jan 2023 06:46:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41492 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231766AbjAKLpm (ORCPT ); Wed, 11 Jan 2023 06:45:42 -0500 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8EAA71A393; Wed, 11 Jan 2023 03:44:34 -0800 (PST) Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30B8FOMd017129; Wed, 11 Jan 2023 11:44:22 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=1EdzcPkSdTelfhGkPLjKsbQZu84wO2e6Uzz+oZFdaZ4=; b=MVy4f/+7njHzxRCNsw6arjCtmCss3q7C1buU0KQ5UdXw1uTPATjMsPSfYEWOKi0cfZgD djTs3yQsSX/Z5yUY+ASdKSxPjKmdr+CDW1aTfTW8DqYRQ795/+Z8aR6kM9ZEX5Q+HFo9 Oh9F8B0a4vuApiWy8iNdkWVLsSa6DUotqSyTs8fq8hVT/Tq3gtRjtDrWOEB4Kl1mIZ8m NU58kQXtILS8N6NUrRr4GgpYKIB905m9A8bWqDaeDbuiik15H8K7JJJOhYgaG/X32Jfy 0y4XucYCBxwXu+PFx6Pum2EyGp4crDwsvbYg/N0o7jQBk/Xc9JsSskw6F+Ukiz8KmeLu 9Q== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3n1m6p11y2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 11 Jan 2023 11:44:22 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 30BBiL1u029626 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 11 Jan 2023 11:44:21 GMT Received: from blr-ubuntu-87.ap.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Wed, 11 Jan 2023 03:44:16 -0800 From: Sibi Sankar To: , , CC: , , , , , , , , , , , , Sibi Sankar Subject: [PATCH V3 05/10] remoteproc: qcom_q6v5_mss: Use a carveout to authenticate modem headers Date: Wed, 11 Jan 2023 17:13:32 +0530 Message-ID: <20230111114337.24782-6-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230111114337.24782-1-quic_sibis@quicinc.com> References: <20230111114337.24782-1-quic_sibis@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: KeQHVx3XQORwXc1wJ8tqqV72KvC6JGrh X-Proofpoint-GUID: KeQHVx3XQORwXc1wJ8tqqV72KvC6JGrh X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2023-01-11_05,2023-01-11_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 suspectscore=0 mlxscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 mlxlogscore=999 clxscore=1015 spamscore=0 phishscore=0 priorityscore=1501 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301110086 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Any access to the dynamically allocated metadata region by the application processor after assigning it to the remote Q6 will result in a XPU violation. Fix this by replacing the dynamically allocated memory region with a no-map carveout and unmap the modem metadata memory region before passing control to the remote Q6. Reported-and-tested-by: Amit Pundir Fixes: 6c5a9dc2481b ("remoteproc: qcom: Make secure world call for mem ownership switch") Signed-off-by: Sibi Sankar --- v3: * Drop revert no_kernel_mapping since it's already on the list [Mani] * kfree metadata from the branch for parity drivers/remoteproc/qcom_q6v5_mss.c | 48 ++++++++++++++++++++++++++---- 1 file changed, 42 insertions(+), 6 deletions(-) diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c index e2f765f87ec9..e25d44e20ae7 100644 --- a/drivers/remoteproc/qcom_q6v5_mss.c +++ b/drivers/remoteproc/qcom_q6v5_mss.c @@ -215,6 +215,7 @@ struct q6v5 { size_t mba_size; size_t dp_size; + phys_addr_t mdata_phys; phys_addr_t mpss_phys; phys_addr_t mpss_reloc; size_t mpss_size; @@ -973,15 +974,29 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw, if (IS_ERR(metadata)) return PTR_ERR(metadata); - ptr = dma_alloc_attrs(qproc->dev, size, &phys, GFP_KERNEL, dma_attrs); - if (!ptr) { - kfree(metadata); - dev_err(qproc->dev, "failed to allocate mdt buffer\n"); - return -ENOMEM; + if (qproc->mdata_phys) { + phys = qproc->mdata_phys; + ptr = memremap(qproc->mdata_phys, size, MEMREMAP_WC); + if (!ptr) { + kfree(metadata); + dev_err(qproc->dev, "unable to map memory region: %pa+%zx\n", + &qproc->mdata_phys, size); + return -EBUSY; + } + } else { + ptr = dma_alloc_attrs(qproc->dev, size, &phys, GFP_KERNEL, dma_attrs); + if (!ptr) { + kfree(metadata); + dev_err(qproc->dev, "failed to allocate mdt buffer\n"); + return -ENOMEM; + } } memcpy(ptr, metadata, size); + if (qproc->mdata_phys) + memunmap(ptr); + /* Hypervisor mapping to access metadata by modem */ mdata_perm = BIT(QCOM_SCM_VMID_HLOS); ret = q6v5_xfer_mem_ownership(qproc, &mdata_perm, false, true, @@ -1010,7 +1025,8 @@ static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw, "mdt buffer not reclaimed system may become unstable\n"); free_dma_attrs: - dma_free_attrs(qproc->dev, size, ptr, phys, dma_attrs); + if (!qproc->mdata_phys) + dma_free_attrs(qproc->dev, size, ptr, phys, dma_attrs); kfree(metadata); return ret < 0 ? ret : 0; @@ -1893,6 +1909,26 @@ static int q6v5_alloc_memory_region(struct q6v5 *qproc) qproc->mpss_phys = qproc->mpss_reloc = r.start; qproc->mpss_size = resource_size(&r); + if (!child) { + node = of_parse_phandle(qproc->dev->of_node, "memory-region", 2); + } else { + child = of_get_child_by_name(qproc->dev->of_node, "metadata"); + node = of_parse_phandle(child, "memory-region", 0); + of_node_put(child); + } + + if (!node) + return 0; + + ret = of_address_to_resource(node, 0, &r); + of_node_put(node); + if (ret) { + dev_err(qproc->dev, "unable to resolve metadata region\n"); + return ret; + } + + qproc->mdata_phys = r.start; + return 0; }