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=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 AA3C2C433E0 for ; Mon, 1 Feb 2021 13:15:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 47B7F64E2A for ; Mon, 1 Feb 2021 13:15:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231575AbhBANPa (ORCPT ); Mon, 1 Feb 2021 08:15:30 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:51857 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231259AbhBANPP (ORCPT ); Mon, 1 Feb 2021 08:15:15 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612185229; 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=nyvxE4S+tnKGPbbqPNAixL0EJdlwj8mgAwHjE4Qon4Q=; b=JI60f/NXYwslTGjHvGUkKpRqMwO/7yuHSlshervhH+r9WAOqDJS9bdBam6ObfULGmqLs+y NeLVBy3yDB4611OBhwI62/Cn8G5aLupenSTu62Cf+7UJuN3ZqLSBWAEZo6ssBrKvjhZNgj H3HKLN6weEg45PAmCm1YVmUg52QFkEM= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-357-RvuCQ1qwOsO6MWCuhYclTw-1; Mon, 01 Feb 2021 08:13:47 -0500 X-MC-Unique: RvuCQ1qwOsO6MWCuhYclTw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 645488144E6; Mon, 1 Feb 2021 13:13:46 +0000 (UTC) Received: from gondolin (ovpn-113-126.ams2.redhat.com [10.36.113.126]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7CC505D749; Mon, 1 Feb 2021 13:13:42 +0000 (UTC) Date: Mon, 1 Feb 2021 14:13:39 +0100 From: Cornelia Huck To: Steve Sistare Cc: kvm@vger.kernel.org, Alex Williamson , Kirti Wankhede Subject: Re: [PATCH V3 4/9] vfio: interfaces to update vaddr Message-ID: <20210201141339.4d8b964a.cohuck@redhat.com> In-Reply-To: <1611939252-7240-5-git-send-email-steven.sistare@oracle.com> References: <1611939252-7240-1-git-send-email-steven.sistare@oracle.com> <1611939252-7240-5-git-send-email-steven.sistare@oracle.com> Organization: Red Hat GmbH MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Fri, 29 Jan 2021 08:54:07 -0800 Steve Sistare wrote: > Define interfaces that allow the underlying memory object of an iova > range to be mapped to a new host virtual address in the host process: > > - VFIO_DMA_UNMAP_FLAG_VADDR for VFIO_IOMMU_UNMAP_DMA > - VFIO_DMA_MAP_FLAG_VADDR flag for VFIO_IOMMU_MAP_DMA > - VFIO_UPDATE_VADDR extension for VFIO_CHECK_EXTENSION > > Unmap vaddr invalidates the host virtual address in an iova range, and > blocks vfio translation of host virtual addresses. DMA to already-mapped > pages continues. Map vaddr updates the base VA and resumes translation. > See comments in uapi/linux/vfio.h for more details. > > Signed-off-by: Steve Sistare > --- > include/uapi/linux/vfio.h | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) Reviewed-by: Cornelia Huck