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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 65016C433DF for ; Mon, 18 May 2020 03:00:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3896320787 for ; Mon, 18 May 2020 03:00:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727033AbgERDAr (ORCPT ); Sun, 17 May 2020 23:00:47 -0400 Received: from mga17.intel.com ([192.55.52.151]:34839 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726680AbgERDAr (ORCPT ); Sun, 17 May 2020 23:00:47 -0400 IronPort-SDR: G3+DSFow9qx80B57ytZLh7cpJqSFR5aT88/0bhqJ/HvoQT4lyMxEr9k//UvgfaItjwx9XIHRed knCx3Cp/Bjpw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 May 2020 20:00:46 -0700 IronPort-SDR: 8hFVjjQ1rWf9g9PItNpkMFb9V3x0CZN8lj2Z4/VZzX/rkoAdE4rdqqUwAGVYLx53UuMj1meEdK wh+K/MufHlIQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,405,1583222400"; d="scan'208";a="411105557" Received: from joy-optiplex-7040.sh.intel.com ([10.239.13.16]) by orsmga004.jf.intel.com with ESMTP; 17 May 2020 20:00:43 -0700 From: Yan Zhao To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: alex.williamson@redhat.com, cohuck@redhat.com, zhenyuw@linux.intel.com, zhi.a.wang@intel.com, kevin.tian@intel.com, shaopeng.he@intel.com, yi.l.liu@intel.com, xin.zeng@intel.com, hang.yuan@intel.com, Tina Zhang , Eric Auger Subject: [RFC PATCH v4 06/10] vfio: Define device specific irq type capability Date: Sun, 17 May 2020 22:50:52 -0400 Message-Id: <20200518025052.14369-1-yan.y.zhao@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200518024202.13996-1-yan.y.zhao@intel.com> References: <20200518024202.13996-1-yan.y.zhao@intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tina Zhang Cap the number of irqs with fixed indexes and use capability chains to chain device specific irqs. v2: - Irq capability index starts from 1. Signed-off-by: Tina Zhang Signed-off-by: Eric Auger --- 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 0fe7c9a6f211..2d0d85c7c4d4 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -683,11 +683,27 @@ 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 count; /* Number of IRQs within this index */ + __u32 cap_offset; /* Offset within info struct of first cap */ }; #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 1 + +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) * @@ -789,7 +805,8 @@ 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 */ }; /* -- 2.17.1