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Commit df660251 authored by Ian Campbell's avatar Ian Campbell Committed by Konrad Rzeszutek Wilk
Browse files

xen: add backend driver support 



Impact: backend device support

Add the basic machinery to support backend drivers.

Signed-off-by: default avatarIan Campbell <ian.campbell@citrix.com>
Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
[corresponds to 79727b851bac in git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git

]
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 2de06cc1

drivers/xen/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -29,6 +29,14 @@ config XEN_DEV_EVTCHN 
	  firing.

	  If in doubt, say yes.



config XEN_BACKEND

	tristate "Backend driver support"

	depends on XEN_DOM0

	default y

	help

	  Support for backend device drivers that provide I/O services

	  to other virtual machines.



config XENFS

	tristate "Xen filesystem"

	default y

drivers/xen/xenbus/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -6,4 +6,7 @@ xenbus-objs += xenbus_comms.o 
xenbus-objs += xenbus_xs.o

xenbus-objs += xenbus_probe.o



xenbus-be-objs-$(CONFIG_XEN_BACKEND) += xenbus_probe_backend.o

xenbus-objs += $(xenbus-be-objs-y)



obj-$(CONFIG_XEN_XENBUS_FRONTEND) += xenbus_probe_frontend.o

drivers/xen/xenbus/xenbus_comms.c

+1 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ static DECLARE_WAIT_QUEUE_HEAD(xb_waitq); 
static irqreturn_t wake_waiting(int irq, void *unused)

{

	if (unlikely(xenstored_ready == 0)) {

		printk(KERN_CRIT "xenbus_probe wake_waiting\n");

		xenstored_ready = 1;

		schedule_work(&probe_work);

	}

drivers/xen/xenbus/xenbus_probe.c

+2 −11
Original line number Diff line number Diff line
@@ -95,17 +95,6 @@ int xenbus_match(struct device *_dev, struct device_driver *_drv) 
EXPORT_SYMBOL_GPL(xenbus_match);





int xenbus_uevent(struct device *_dev, struct kobj_uevent_env *env)

{

	struct xenbus_device *dev = to_xenbus_device(_dev);



	if (add_uevent_var(env, "MODALIAS=xen:%s", dev->devicetype))

		return -ENOMEM;



	return 0;

}

EXPORT_SYMBOL_GPL(xenbus_uevent);



static void free_otherend_details(struct xenbus_device *dev)

{

	kfree(dev->otherend);
@@ -690,6 +679,8 @@ void xenbus_probe(struct work_struct *unused) 
{

	xenstored_ready = 1;



	printk(KERN_CRIT "xenbus_probe wake_waiting\n");



	/* Notify others that xenstore is up */

	blocking_notifier_call_chain(&xenstore_chain, 0, NULL);

}

drivers/xen/xenbus/xenbus_probe.h

+0 −1
Original line number Diff line number Diff line
@@ -60,7 +60,6 @@ extern int xenbus_probe_devices(struct xen_bus_type *bus); 


extern void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);



extern int xenbus_uevent(struct device *_dev, struct kobj_uevent_env *env);

extern void xenbus_dev_shutdown(struct device *_dev);



extern int xenbus_dev_suspend(struct device *dev, pm_message_t state);