From patchwork Mon Mar 23 17:19:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Diana Madalina Craciun X-Patchwork-Id: 11453575 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 674331668 for ; Mon, 23 Mar 2020 17:19:45 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C64DD20722 for ; Mon, 23 Mar 2020 17:19:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Mj6hwo5+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C64DD20722 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oss.nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=d3UPDAZaHHjEbdpcy0G9F5G75cqtR96eq/Ll5faCKCo=; b=Mj6hwo5+14Ire2zvDy53sXqlty Mo+Hn0FVDf6N4dlgw+0GRG4F1bgL1919akNZ+Vxdq6GgHOwM1MxyCRfuPh4fSPu8NhZLomEODJXzp RcHOVMGgzH/+pIuxNW0spFpS5dedesPxUTmXw6klN7pOnQAIwqeO7FIm4TPxhGrxXkxUfP0d5ih8/ h4d6yhWtff86khih4fgexfmXpQArxbAIVIFT+Mxg9A2Jo7k/WJnH6m/8ibANJ0yCH2Cx48Wg0nM6h hBEhUkmahXBCjmci+Wjyl9sgVreGU9KiUxGi8wM0f0LSkOqsRdnLxdhyp8vLudouXc2uc5k9NxISp pC5LTMTA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGQjl-0003xV-0d; Mon, 23 Mar 2020 17:19:41 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGQjb-0003n8-9C for linux-arm-kernel@lists.infradead.org; Mon, 23 Mar 2020 17:19:32 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 9B313201848; Mon, 23 Mar 2020 18:19:28 +0100 (CET) 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 8E2A52012E7; Mon, 23 Mar 2020 18:19:28 +0100 (CET) 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 F12E62035C; Mon, 23 Mar 2020 18:19:27 +0100 (CET) From: Diana Craciun To: kvm@vger.kernel.org, alex.williamson@redhat.com, laurentiu.tudor@nxp.com, linux-arm-kernel@lists.infradead.org, bharatb.yadav@gmail.com Subject: [PATCH 3/9] vfio/fsl-mc: Implement VFIO_DEVICE_GET_INFO ioctl Date: Mon, 23 Mar 2020 19:19:05 +0200 Message-Id: <20200323171911.27178-4-diana.craciun@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200323171911.27178-1-diana.craciun@oss.nxp.com> References: <20200323171911.27178-1-diana.craciun@oss.nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200323_101931_457021_368D4ACC X-CRM114-Status: UNSURE ( 7.86 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [92.121.34.21 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 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: Bharat Bhushan , linux-kernel@vger.kernel.org, Diana Craciun MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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 | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c index 5cc533808bc1..ab1cde375fc6 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c @@ -31,10 +31,30 @@ 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 -EINVAL; + 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: {