From patchwork Thu Jun 27 03:37:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhang, Tina" X-Patchwork-Id: 11018707 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 221A614C0 for ; Thu, 27 Jun 2019 03:44:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 152C728A13 for ; Thu, 27 Jun 2019 03:44:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 073B228A38; Thu, 27 Jun 2019 03:44:24 +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 A959A28A13 for ; Thu, 27 Jun 2019 03:44:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726913AbfF0DoE (ORCPT ); Wed, 26 Jun 2019 23:44:04 -0400 Received: from mga17.intel.com ([192.55.52.151]:21244 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726447AbfF0DoE (ORCPT ); Wed, 26 Jun 2019 23:44:04 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Jun 2019 20:44:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,422,1557212400"; d="scan'208";a="360560962" Received: from gvt.bj.intel.com ([10.238.158.187]) by fmsmga005.fm.intel.com with ESMTP; 26 Jun 2019 20:44:01 -0700 From: Tina Zhang To: intel-gvt-dev@lists.freedesktop.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Tina Zhang , kraxel@redhat.com, zhenyuw@linux.intel.com, zhiyuan.lv@intel.com, zhi.a.wang@intel.com, kevin.tian@intel.com, hang.yuan@intel.com, alex.williamson@redhat.com Subject: [RFC PATCH v3 1/4] vfio: Define device specific irq type capability Date: Thu, 27 Jun 2019 11:37:59 +0800 Message-Id: <20190627033802.1663-2-tina.zhang@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190627033802.1663-1-tina.zhang@intel.com> References: <20190627033802.1663-1-tina.zhang@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Cap the number of irqs with fixed indexes and use capability chains to chain device specific irqs. Signed-off-by: Tina Zhang --- include/uapi/linux/vfio.h | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 02bb7ad6e986..600784acc4ac 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -444,11 +444,27 @@ struct vfio_irq_info { #define VFIO_IRQ_INFO_MASKABLE (1 << 1) #define VFIO_IRQ_INFO_AUTOMASKED (1 << 2) #define VFIO_IRQ_INFO_NORESIZE (1 << 3) +#define VFIO_IRQ_INFO_FLAG_CAPS (1 << 4) /* Info supports caps */ __u32 index; /* IRQ index */ + __u32 cap_offset; /* Offset within info struct of first cap */ __u32 count; /* Number of IRQs within this index */ }; #define VFIO_DEVICE_GET_IRQ_INFO _IO(VFIO_TYPE, VFIO_BASE + 9) +/* + * The irq type capability allows irqs unique to a specific device or + * class of devices to be exposed. + * + * The structures below define version 1 of this capability. + */ +#define VFIO_IRQ_INFO_CAP_TYPE 3 + +struct vfio_irq_info_cap_type { + struct vfio_info_cap_header header; + __u32 type; /* global per bus driver */ + __u32 subtype; /* type specific */ +}; + /** * VFIO_DEVICE_SET_IRQS - _IOW(VFIO_TYPE, VFIO_BASE + 10, struct vfio_irq_set) * @@ -550,7 +566,8 @@ enum { VFIO_PCI_MSIX_IRQ_INDEX, VFIO_PCI_ERR_IRQ_INDEX, VFIO_PCI_REQ_IRQ_INDEX, - VFIO_PCI_NUM_IRQS + VFIO_PCI_NUM_IRQS = 5 /* Fixed user ABI, IRQ indexes >=5 use */ + /* device specific cap to define content */ }; /*