Commit 8b21ab14 authored May 20, 2013 by Michael S. Tsirkin Committed by Rusty Russell May 20, 2013

virtio_pci: better macro exported in uapi



Macro VIRTIO_PCI_CONFIG assumes that userspace actually has a structure
with a field named msix_enabled.  Add VIRTIO_PCI_CONFIG_OFF that gets
the msix_enabled by value instead, to make it useful for userspace.  We
still keep VIRTIO_PCI_CONFIG around for now, in case some userspace uses
it.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

parent d5fe85af

include/uapi/linux/virtio_pci.h

+3 −1

Original line number	Diff line number	Diff line
		@@ -80,7 +80,9 @@

		/* The remaining space is defined by each driver as the per-driver
		* configuration space */
		#define VIRTIO_PCI_CONFIG(dev) ((dev)->msix_enabled ? 24 : 20)
		#define VIRTIO_PCI_CONFIG_OFF(msix_enabled) ((msix_enabled) ? 24 : 20)
		/* Deprecated: please use VIRTIO_PCI_CONFIG_OFF instead */
		#define VIRTIO_PCI_CONFIG(dev) VIRTIO_PCI_CONFIG_OFF((dev)->msix_enabled)

		/* Virtio ABI version, this must match exactly */
		#define VIRTIO_PCI_ABI_VERSION 0