From patchwork Thu May 2 11:47:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 10926613 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7720C14C0 for ; Thu, 2 May 2019 11:49:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6596429015 for ; Thu, 2 May 2019 11:49:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 592C12901B; Thu, 2 May 2019 11:49:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 04DB929015 for ; Thu, 2 May 2019 11:49:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726448AbfEBLsk (ORCPT ); Thu, 2 May 2019 07:48:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47968 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726189AbfEBLsj (ORCPT ); Thu, 2 May 2019 07:48:39 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 39AFDF74AB; Thu, 2 May 2019 11:48:39 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.58]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7999317DDF; Thu, 2 May 2019 11:48:34 +0000 (UTC) From: Maxim Levitsky To: linux-nvme@lists.infradead.org Cc: Maxim Levitsky , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Jens Axboe , Alex Williamson , Keith Busch , Christoph Hellwig , Sagi Grimberg , Kirti Wankhede , "David S . Miller" , Mauro Carvalho Chehab , Greg Kroah-Hartman , Wolfram Sang , Nicolas Ferre , "Paul E . McKenney " , Paolo Bonzini , Liang Cunming , Liu Changpeng , Fam Zheng , Amnon Ilan , John Ferlan Subject: [PATCH v2 02/10] vfio/mdev: add .request callback Date: Thu, 2 May 2019 14:47:53 +0300 Message-Id: <20190502114801.23116-3-mlevitsk@redhat.com> In-Reply-To: <20190502114801.23116-1-mlevitsk@redhat.com> References: <20190502114801.23116-1-mlevitsk@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Thu, 02 May 2019 11:48:39 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This will allow the hotplug to be enabled for mediated devices Signed-off-by: Maxim Levitsky --- drivers/vfio/mdev/vfio_mdev.c | 11 +++++++++++ include/linux/mdev.h | 4 ++++ 2 files changed, 15 insertions(+) diff --git a/drivers/vfio/mdev/vfio_mdev.c b/drivers/vfio/mdev/vfio_mdev.c index d230620fe02d..17aa76de0764 100644 --- a/drivers/vfio/mdev/vfio_mdev.c +++ b/drivers/vfio/mdev/vfio_mdev.c @@ -101,6 +101,16 @@ static int vfio_mdev_mmap(void *device_data, struct vm_area_struct *vma) return parent->ops->mmap(mdev, vma); } +static void vfio_mdev_request(void *device_data, unsigned int count) +{ + struct mdev_device *mdev = device_data; + struct mdev_parent *parent = mdev->parent; + + if (unlikely(!parent->ops->request)) + return; + parent->ops->request(mdev, count); +} + static const struct vfio_device_ops vfio_mdev_dev_ops = { .name = "vfio-mdev", .open = vfio_mdev_open, @@ -109,6 +119,7 @@ static const struct vfio_device_ops vfio_mdev_dev_ops = { .read = vfio_mdev_read, .write = vfio_mdev_write, .mmap = vfio_mdev_mmap, + .request = vfio_mdev_request, }; static int vfio_mdev_probe(struct device *dev) diff --git a/include/linux/mdev.h b/include/linux/mdev.h index d7aee90e5da5..6f315cb9575c 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -13,6 +13,9 @@ #ifndef MDEV_H #define MDEV_H +#include +#include + struct mdev_device; /** @@ -81,6 +84,7 @@ struct mdev_parent_ops { long (*ioctl)(struct mdev_device *mdev, unsigned int cmd, unsigned long arg); int (*mmap)(struct mdev_device *mdev, struct vm_area_struct *vma); + void (*request)(struct mdev_device *mdev, unsigned int count); }; /* interface for exporting mdev supported type attributes */