From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 91557C4724C for ; Fri, 8 May 2020 07:20:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DA4920736 for ; Fri, 8 May 2020 07:20:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727032AbgEHHUs (ORCPT ); Fri, 8 May 2020 03:20:48 -0400 Received: from inva021.nxp.com ([92.121.34.21]:59166 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726365AbgEHHUq (ORCPT ); Fri, 8 May 2020 03:20:46 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 469232012D3; Fri, 8 May 2020 09:20:45 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 3A87320096A; Fri, 8 May 2020 09:20:45 +0200 (CEST) Received: from fsr-ub1864-111.ea.freescale.net (fsr-ub1864-111.ea.freescale.net [10.171.82.141]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id A53FD204BD; Fri, 8 May 2020 09:20:44 +0200 (CEST) From: Diana Craciun To: alex.williamson@redhat.com, kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, laurentiu.tudor@nxp.com, bharatb.linux@gmail.com, Diana Craciun , Bharat Bhushan Subject: [PATCH v2 3/9] vfio/fsl-mc: Implement VFIO_DEVICE_GET_INFO ioctl Date: Fri, 8 May 2020 10:20:33 +0300 Message-Id: <20200508072039.18146-4-diana.craciun@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200508072039.18146-1-diana.craciun@oss.nxp.com> References: <20200508072039.18146-1-diana.craciun@oss.nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Allow userspace to get fsl-mc device info (number of regions and irqs). Signed-off-by: Bharat Bhushan Signed-off-by: Diana Craciun --- drivers/vfio/fsl-mc/vfio_fsl_mc.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c index ea301ba81225..8a4d3203b176 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c @@ -33,10 +33,29 @@ static void vfio_fsl_mc_release(void *device_data) static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd, unsigned long arg) { + unsigned long minsz; + struct vfio_fsl_mc_device *vdev = device_data; + struct fsl_mc_device *mc_dev = vdev->mc_dev; + switch (cmd) { case VFIO_DEVICE_GET_INFO: { - return -ENOTTY; + struct vfio_device_info info; + + minsz = offsetofend(struct vfio_device_info, num_irqs); + + if (copy_from_user(&info, (void __user *)arg, minsz)) + return -EFAULT; + + if (info.argsz < minsz) + return -EINVAL; + + info.flags = VFIO_DEVICE_FLAGS_FSL_MC; + info.num_regions = mc_dev->obj_desc.region_count; + info.num_irqs = mc_dev->obj_desc.irq_count; + + return copy_to_user((void __user *)arg, &info, minsz) ? + -EFAULT : 0; } case VFIO_DEVICE_GET_REGION_INFO: { -- 2.17.1