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Commit ec3d41c4 authored Oct 22, 2007 by Rusty Russell

Virtio interface



This attempts to implement a "virtual I/O" layer which should allow
common drivers to be efficiently used across most virtual I/O
mechanisms.  It will no-doubt need further enhancement.

The virtio drivers add buffers to virtio queues; as the buffers are consumed
the driver "interrupt" callbacks are invoked.

There is also a generic implementation of config space which drivers can query
to get setup information from the host.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Dor Laor <dor.laor@qumranet.com>
Cc: Arnd Bergmann <arnd@arndb.de>

parent 47436aa4

drivers/Kconfig

+2 −0

Original line number	Diff line number	Diff line
		@@ -93,4 +93,6 @@ source "drivers/auxdisplay/Kconfig"
		source "drivers/kvm/Kconfig"

		source "drivers/uio/Kconfig"

		source "drivers/virtio/Kconfig"
		endmenu

drivers/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -91,3 +91,4 @@ obj-$(CONFIG_HID) += hid/
		obj-$(CONFIG_PPC_PS3) += ps3/
		obj-$(CONFIG_OF) += of/
		obj-$(CONFIG_SSB) += ssb/
		obj-$(CONFIG_VIRTIO) += virtio/

drivers/virtio/Kconfig

0 → 100644

+3 −0

Original line number	Diff line number	Diff line
		# Virtio always gets selected by whoever wants it.
		config VIRTIO
		bool

drivers/virtio/Makefile

0 → 100644

+1 −0

Original line number	Diff line number	Diff line
		obj-$(CONFIG_VIRTIO) += virtio.o

drivers/virtio/config.c

0 → 100644

+13 −0

Original line number	Diff line number	Diff line
		/* Configuration space parsing helpers for virtio.
		*
		* The configuration is [type][len][... len bytes ...] fields.
		*
		* Copyright 2007 Rusty Russell, IBM Corporation.
		* GPL v2 or later.
		*/
		#include <linux/err.h>
		#include <linux/virtio.h>
		#include <linux/virtio_config.h>
		#include <linux/bug.h>
		#include <asm/system.h>