[PATCH 2/3] VFIO: VFIO_DEVICE_SET_ADDR_MAPPING command

[Gavin Shan]

The address (domain/bus/slot/function) of the passed PCI device
looks quite different from perspective of host and guest. Some
architectures like PPC need to setup the mapping in host. The patch
introduces additional VFIO device IOCTL command to address that.

Signed-off-by: Gavin Shan <shangw at linux.vnet.ibm.com>
---
 include/uapi/linux/vfio.h |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 6e58d9b..ecc4f38 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -289,6 +289,22 @@ struct vfio_irq_set {
  */
 #define VFIO_DEVICE_RESET		_IO(VFIO_TYPE, VFIO_BASE + 11)
 
+/**
+ * VFIO_DEVICE_SET_ADDR_MAPPING - _IO(VFIO_TYPE, VFIO_BASE + 12)
+ *
+ * The address, which comprised of domain/bus/slot/function looks
+ * different between host and guest. We need to setup the mapping
+ * in host for some architectures like PPC so that the passed PCI
+ * devices could support RTAS smoothly.
+ */
+struct vfio_addr_mapping {
+	__u64 buid;
+	__u8  bus;
+	__u8  slot;
+	__u8  func;
+};
+#define VFIO_DEVICE_SET_ADDR_MAPPING	_IO(VFIO_TYPE, VFIO_BASE + 12)
+
 /*
  * The VFIO-PCI bus driver makes use of the following fixed region and
  * IRQ index mapping.  Unimplemented regions return a size of zero.
-- 
1.7.5.4