From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751467AbbBFFMB (ORCPT ); Fri, 6 Feb 2015 00:12:01 -0500 Received: from ozlabs.org ([103.22.144.67]:39541 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750739AbbBFFL7 (ORCPT ); Fri, 6 Feb 2015 00:11:59 -0500 From: Rusty Russell To: "lkml" Cc: "Michael S. Tsirkin" Subject: [PATCH 1/5] virtio: define VIRTIO_PCI_CAP_PCI_CFG in header. Date: Fri, 6 Feb 2015 15:36:52 +1030 Message-Id: <1423199216-2094-2-git-send-email-rusty@rustcorp.com.au> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1423199216-2094-1-git-send-email-rusty@rustcorp.com.au> References: <1423199216-2094-1-git-send-email-rusty@rustcorp.com.au> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This provides backdoor access to the device MMIOs, and every device should have one. From the virtio 1.0 spec (CS03): 4.1.4.7.1 Device Requirements: PCI configuration access capability The device MUST present at least one VIRTIO_PCI_CAP_PCI_CFG capability. Signed-off-by: Rusty Russell --- include/uapi/linux/virtio_pci.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h index 3b7e4d2765fb..75301468359f 100644 --- a/include/uapi/linux/virtio_pci.h +++ b/include/uapi/linux/virtio_pci.h @@ -109,8 +109,10 @@ #define VIRTIO_PCI_CAP_NOTIFY_CFG 2 /* ISR access */ #define VIRTIO_PCI_CAP_ISR_CFG 3 -/* Device specific confiuration */ +/* Device specific configuration */ #define VIRTIO_PCI_CAP_DEVICE_CFG 4 +/* PCI configuration access */ +#define VIRTIO_PCI_CAP_PCI_CFG 5 /* This is the PCI capability header: */ struct virtio_pci_cap { -- 2.1.0