From patchwork Thu Jun 16 20:38:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Williamson X-Patchwork-Id: 12884809 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 C438DC43334 for ; Thu, 16 Jun 2022 20:39:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378522AbiFPUjE (ORCPT ); Thu, 16 Jun 2022 16:39:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53448 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378300AbiFPUjA (ORCPT ); Thu, 16 Jun 2022 16:39:00 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id E7A4C5DA23 for ; Thu, 16 Jun 2022 13:38:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1655411936; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0dGui2spriv3iAulrwiNMcWwONMItPuBxb3qL7Yeusw=; b=XHIxL/Cck01mf0sKRYdGZda+4E3E0vLGHJ0DWmyQxyI/Okri6mlNj5o4kG8h3hNQLdftYW HNdKkVrKtX4jTXKRhlH/n9OhsEaiaqiJxoYAAbIqrR15F4O60oiFpcf8G5T60Y3XfcDRGm kTr30moxzpmIopWxI8fWfRegGtwAcEY= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-627-B7Qv_YbCPYOC5_bqB-dG9A-1; Thu, 16 Jun 2022 16:38:54 -0400 X-MC-Unique: B7Qv_YbCPYOC5_bqB-dG9A-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id F354F101AA47; Thu, 16 Jun 2022 20:38:53 +0000 (UTC) Received: from [172.30.41.16] (unknown [10.22.35.67]) by smtp.corp.redhat.com (Postfix) with ESMTP id F37241415108; Thu, 16 Jun 2022 20:38:52 +0000 (UTC) Subject: [PATCH v2 2/2] vfio/pci: Remove console drivers From: Alex Williamson To: corbet@lwn.net, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@linux.ie, daniel@ffwll.ch, deller@gmx.de, gregkh@linuxfoundation.org Cc: Laszlo Ersek , Gerd Hoffmann , linux-doc@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Date: Thu, 16 Jun 2022 14:38:52 -0600 Message-ID: <165541193265.1955826.8778757616438743090.stgit@omen> In-Reply-To: <165541020563.1955826.16350888595945658159.stgit@omen> References: <165541020563.1955826.16350888595945658159.stgit@omen> User-Agent: StGit/1.5.dev2+g9ce680a52bd9 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Console drivers can create conflicts with PCI resources resulting in userspace getting mmap failures to memory BARs. This is especially evident when trying to re-use the system primary console for userspace drivers. Use the aperture helpers to remove these conflicts. Reported-by: Laszlo Ersek Suggested-by: Gerd Hoffmann Signed-off-by: Alex Williamson Reviewed-by: Javier Martinez Canillas --- drivers/vfio/pci/vfio_pci_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index a0d69ddaf90d..5b2a6e9f7cf7 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -10,6 +10,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include #include #include #include @@ -1793,6 +1794,10 @@ static int vfio_pci_vga_init(struct vfio_pci_core_device *vdev) if (!vfio_pci_is_vga(pdev)) return 0; + ret = remove_conflicting_pci_devices(pdev, vdev->vdev.ops->name); + if (ret) + return ret; + ret = vga_client_register(pdev, vfio_pci_set_decode); if (ret) return ret;