From: Rusty Russell <rusty@rustcorp.com.au>
Date: Wed, 11 Feb 2015 04:31:14 +0000 (+1030)
Subject: virtio: define VIRTIO_PCI_CAP_PCI_CFG in header.
X-Git-Tag: firefly_0821_release~176^2~2282^2~51
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e6a02746e0a9cdda5114db912fe2aadfed289aae;p=firefly-linux-kernel-4.4.55.git

virtio: define VIRTIO_PCI_CAP_PCI_CFG in header.

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 <rusty@rustcorp.com.au>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
---

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 {