virtio-mmio: Devices parameter parsing

This patch adds an option to instantiate guest virtio-mmio devices
basing on a kernel command line (or module) parameter, for example:

	virtio_mmio.devices=0x100@0x100b0000:48

Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
index 1a61939b85fc..f38b17a86c35 100644
--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -46,4 +46,15 @@ config VIRTIO_BALLOON
 
          If unsure, say N.
 
+config VIRTIO_MMIO_CMDLINE_DEVICES
+        bool "Memory mapped virtio devices parameter parsing"
+        depends on VIRTIO_MMIO
+        ---help---
+         Allow virtio-mmio devices instantiation via the kernel command line
+         or module parameters. Be aware that using incorrect parameters (base
+         address in particular) can crash your system - you have been warned.
+         See Documentation/kernel-parameters.txt for details.
+
+         If unsure, say 'N'.
+
 endmenu