From patchwork Thu Oct 26 08:17:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ekansh Gupta X-Patchwork-Id: 738759 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 A2F18C25B6F for ; Thu, 26 Oct 2023 08:18:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344550AbjJZIST (ORCPT ); Thu, 26 Oct 2023 04:18:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51484 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230283AbjJZISR (ORCPT ); Thu, 26 Oct 2023 04:18:17 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4A26DE; Thu, 26 Oct 2023 01:18:15 -0700 (PDT) Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39Q84QkD005464; Thu, 26 Oct 2023 08:18:14 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=hsibUURuaOSyADWg6+k+o19Ya1zYqRn0cGAJHu9TGow=; b=bOlQ0wH8sduyri08tHaW3tjayKiPU4p7/byZYApA8L0En5eReb31Eil3CVDXDS8T5Spp p/n/yuapNsYHgFJf87TivWd4LJrhgHSSLxcj+wSagdAdwTCRKrAA0IIzeDhEQIz9jW0d nCQw+iau/GMK30P8rkF66Esgqyt9DGmkTx7fk3H7ktnaasRQadOU7WOAhDyOzVRQoSBK fADOedQSgkzWNApoiwsX3zKPo5VX8ZjNOYpp3hzK+VPyUnS1xh4/qeXJqEjuEvVGV/vY TRJpUfe8jFVSZtSqGwMSrRkWNagh5aVlxc1gphGWbAtOnKG2MyICKQB55fsaqNMncy/q 7g== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3txtw1k4rj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 26 Oct 2023 08:18:13 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 39Q8ICIs017837 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 26 Oct 2023 08:18:12 GMT Received: from ekangupt-linux.qualcomm.com (10.80.80.8) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.39; Thu, 26 Oct 2023 01:18:10 -0700 From: Ekansh Gupta To: , CC: , Subject: [PATCH v6 2/5] misc: fastrpc: Add CRC support for remote buffers Date: Thu, 26 Oct 2023 13:47:59 +0530 Message-ID: <1698308282-8648-3-git-send-email-quic_ekangupt@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1698308282-8648-1-git-send-email-quic_ekangupt@quicinc.com> References: <1698308282-8648-1-git-send-email-quic_ekangupt@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: XRz_8GQ4-u_bW3nMSRy8ihqkK7RgC1WQ X-Proofpoint-GUID: XRz_8GQ4-u_bW3nMSRy8ihqkK7RgC1WQ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-26_05,2023-10-25_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 malwarescore=0 priorityscore=1501 adultscore=0 suspectscore=0 bulkscore=0 mlxlogscore=999 lowpriorityscore=0 clxscore=1015 impostorscore=0 mlxscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310170001 definitions=main-2310260068 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org CRC check for input and output argument helps in ensuring data consistency over a remote call. If user intends to enable CRC check, first local user CRC is calculated at user end and a CRC buffer is passed to DSP to capture remote CRC values. DSP is expected to write to the remote CRC buffer which is then compared at user level with the local CRC values. Signed-off-by: Ekansh Gupta --- drivers/misc/fastrpc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index e392e2a..825ff91 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -611,6 +611,7 @@ static struct fastrpc_invoke_ctx *fastrpc_context_alloc( /* Released in fastrpc_context_put() */ fastrpc_channel_ctx_get(cctx); + ctx->crc = (u32 *)(uintptr_t)invoke->crc; ctx->sc = sc; ctx->retval = -1; ctx->pid = current->pid; @@ -1066,6 +1067,7 @@ static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, struct fastrpc_invoke_buf *list; struct fastrpc_phy_page *pages; u64 *fdlist; + u32 *crclist; int i, inbufs, outbufs, handles; inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); @@ -1073,7 +1075,8 @@ static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, handles = REMOTE_SCALARS_INHANDLES(ctx->sc) + REMOTE_SCALARS_OUTHANDLES(ctx->sc); list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); pages = fastrpc_phy_page_start(list, ctx->nscalars); - fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); + fdlist = (u64 *)(pages + inbufs + outbufs + handles); + crclist = (u32 *)(fdlist + FASTRPC_MAX_FDLIST); for (i = inbufs; i < ctx->nbufs; ++i) { if (!ctx->maps[i]) { @@ -1097,6 +1100,10 @@ static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, fastrpc_map_put(mmap); } + if (ctx->crc && crclist && rpra) { + if (copy_to_user((void __user *)ctx->crc, crclist, FASTRPC_MAX_CRCLIST * sizeof(u32))) + return -EFAULT; + } return 0; } @@ -1721,6 +1728,7 @@ static int fastrpc_multimode_invoke(struct fastrpc_user *fl, char __user *argp) switch (invoke.req) { case FASTRPC_INVOKE: + case FASTRPC_INVOKE_ENHANCED: /* nscalars is truncated here to max supported value */ if (copy_from_user(&einv, (void __user *)(uintptr_t)invoke.invparam, invoke.size))