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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 D93C9C04AB6 for ; Tue, 28 May 2019 21:43:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B8E7921670 for ; Tue, 28 May 2019 21:43:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728090AbfE1Vnp (ORCPT ); Tue, 28 May 2019 17:43:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48056 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726526AbfE1Vno (ORCPT ); Tue, 28 May 2019 17:43:44 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E4695300194A; Tue, 28 May 2019 21:43:43 +0000 (UTC) Received: from x1.home (ovpn-116-22.phx2.redhat.com [10.3.116.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0DD485C241; Tue, 28 May 2019 21:43:43 +0000 (UTC) Date: Tue, 28 May 2019 15:43:42 -0600 From: Alex Williamson To: Pierre Morel Cc: sebott@linux.vnet.ibm.com, gerald.schaefer@de.ibm.com, pasic@linux.vnet.ibm.com, borntraeger@de.ibm.com, walling@linux.ibm.com, linux-s390@vger.kernel.org, iommu@lists.linux-foundation.org, joro@8bytes.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, robin.murphy@arm.com Subject: Re: [PATCH v3 2/3] vfio: zpci: defining the VFIO headers Message-ID: <20190528154342.7b0f3946@x1.home> In-Reply-To: <1558614326-24711-3-git-send-email-pmorel@linux.ibm.com> References: <1558614326-24711-1-git-send-email-pmorel@linux.ibm.com> <1558614326-24711-3-git-send-email-pmorel@linux.ibm.com> Organization: Red Hat MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.40]); Tue, 28 May 2019 21:43:44 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 23 May 2019 14:25:25 +0200 Pierre Morel wrote: > We define a new device region in vfio.h to be able to > get the ZPCI CLP information by reading this region from > userland. > > We create a new file, vfio_zdev.h to define the structure > of the new region we defined in vfio.h > > Signed-off-by: Pierre Morel > --- > include/uapi/linux/vfio.h | 4 ++++ > include/uapi/linux/vfio_zdev.h | 34 ++++++++++++++++++++++++++++++++++ > 2 files changed, 38 insertions(+) > create mode 100644 include/uapi/linux/vfio_zdev.h > > diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h > index 8f10748..56595b8 100644 > --- a/include/uapi/linux/vfio.h > +++ b/include/uapi/linux/vfio.h > @@ -306,6 +306,10 @@ struct vfio_region_info_cap_type { > #define VFIO_REGION_TYPE_GFX (1) > #define VFIO_REGION_SUBTYPE_GFX_EDID (1) > > +/* IBM Subtypes */ > +#define VFIO_REGION_TYPE_IBM_ZDEV (1) This one defines (but never uses) a conflicting region type to GFX above. > +#define VFIO_REGION_SUBTYPE_ZDEV_CLP (1) If we're using a PCI vendor type, which the next patch indicates we are, this is the one you need. But please also specify it as a PCI vendor sub-type with the hex PCI vendor ID, and perhaps group it with the Intel vendor sub-types. > + > /** > * struct vfio_region_gfx_edid - EDID region layout. > * > diff --git a/include/uapi/linux/vfio_zdev.h b/include/uapi/linux/vfio_zdev.h > new file mode 100644 > index 0000000..84b1a82 > --- /dev/null > +++ b/include/uapi/linux/vfio_zdev.h > @@ -0,0 +1,34 @@ > +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ > +/* > + * Region definition for ZPCI devices > + * > + * Copyright IBM Corp. 2019 > + * > + * Author(s): Pierre Morel > + */ > + > +#ifndef _VFIO_ZDEV_H_ > +#define _VFIO_ZDEV_H_ > + > +#include > + > +/** > + * struct vfio_region_zpci_info - ZPCI information. > + * > + */ > +struct vfio_region_zpci_info { > + __u64 dasm; > + __u64 start_dma; > + __u64 end_dma; > + __u64 msi_addr; > + __u64 flags; > + __u16 pchid; > + __u16 mui; > + __u16 noi; > + __u8 gid; > + __u8 version; > +#define VFIO_PCI_ZDEV_FLAGS_REFRESH 1 > + __u8 util_str[CLP_UTIL_STR_LEN]; I don't see where CLP_UTIL_STR_LEN is defined in a uapi consumable header. Should this simply be [] where the string length is implied by the remaining region size? QEMU hard codes it, that doesn't validate the vfio uapi. > +} __packed; > + > +#endif