linux-toradex.git/drivers/xen, branch v3.1

xen/irq: Alter the locking to use a mutex instead of a spinlock.

2011-09-15T08:32:02+00:00

When we allocate/change the IRQ informations, we do not
need to use spinlocks. We can use a mutex (which is
what the generic IRQ code does for allocations/changes).
Fixes a slew of:

BUG: sleeping function called from invalid context at /linux/kernel/mutex.c:271
in_atomic(): 1, irqs_disabled(): 0, pid: 3216, name: xenstored
2 locks held by xenstored/3216:
 #0:  (&u->bind_mutex){......}, at: [] evtchn_ioctl+0x30/0x3a0 [xen_evtchn]
 #1:  (irq_mapping_update_lock){......}, at: [] bind_evtchn_to_irq+0x24/0x90
Pid: 3216, comm: xenstored Not tainted 3.1.0-rc6-00021-g437a3d1 #2
Call Trace:
 [] __might_sleep+0x100/0x130
 [] mutex_lock_nested+0x2f/0x50
 [] __irq_alloc_descs+0x49/0x200
 [] ? evtchn_ioctl+0x30/0x3a0 [xen_evtchn]
 [] xen_allocate_irq_dynamic+0x34/0x70
 [] bind_evtchn_to_irq+0x5d/0x90
 [] ? evtchn_bind_to_user+0x60/0x60 [xen_evtchn]
 [] bind_evtchn_to_irqhandler+0x32/0x80
 [] evtchn_bind_to_user+0x49/0x60 [xen_evtchn]
 [] evtchn_ioctl+0x144/0x3a0 [xen_evtchn]
 [] ? vfsmount_lock_local_unlock+0x50/0x80
 [] do_vfs_ioctl+0x9a/0x5e0
 [] ? mntput+0x1f/0x30
 [] ? fput+0x199/0x240
 [] sys_ioctl+0xa1/0xb0
 [] system_call_fastpath+0x16/0x1b

Reported-by: Jim Burns 
Acked-by: Ian Campbell 
Signed-off-by: Konrad Rzeszutek Wilk

xen: xen-selfballoon.c needs more header files

2011-08-10T19:21:46+00:00

Fix build errors (found when CONFIG_SYSFS is not enabled):

drivers/xen/xen-selfballoon.c:446: warning: data definition has no type or storage class
drivers/xen/xen-selfballoon.c:446: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL'
drivers/xen/xen-selfballoon.c:446: warning: parameter names (without types) in function declaration
drivers/xen/xen-selfballoon.c:485: error: expected declaration specifiers or '...' before string constant
drivers/xen/xen-selfballoon.c:485: warning: data definition has no type or storage class
drivers/xen/xen-selfballoon.c:485: warning: type defaults to 'int' in declaration of 'MODULE_LICENSE'
drivers/xen/xen-selfballoon.c:485: warning: function declaration isn't a prototype

Signed-off-by: Randy Dunlap 
Signed-off-by: Konrad Rzeszutek Wilk

xen/self-balloon: Add dependency on tmem.

2011-08-03T18:34:57+00:00

Without enabling CONFIG_XEN_TMEM we get this:

drivers/xen/xen-selfballoon.c:461: undefined reference to `tmem_enabled'

Signed-off-by: Konrad Rzeszutek Wilk

xen/balloon: Fix compile errors - missing header files.

2011-08-03T18:34:55+00:00

With a specific enough .config file compile errors show
for missing workqueue declarations.

Reported-by: Randy Dunlap 
Signed-off-by: Konrad Rzeszutek Wilk

xen/grant: Fix compile warning.

2011-08-03T18:34:53+00:00

drivers/xen/grant-table.c:85: warning: ‘rc’ may be used uninitialized in this function

Signed-off-by: Konrad Rzeszutek Wilk

xen/pciback: remove duplicated #include

2011-08-03T18:34:52+00:00

Remove duplicated #include('s) in
  drivers/xen/xen-pciback/xenbus.c

Signed-off-by: Huang Weiyi 
Signed-off-by: Konrad Rzeszutek Wilk

xen/balloon: memory hotplug support for Xen balloon driver

2011-07-26T03:57:08+00:00

Memory hotplug support for Xen balloon driver.  It should be mentioned
that hotplugged memory is not onlined automatically.  It should be onlined
by user through standard sysfs interface.

Memory could be hotplugged in following steps:

  1) dom0: xl mem-max  
     where  is >= requested memory size,

  2) dom0: xl mem-set  
     where  is requested memory size; alternatively memory
     could be added by writing proper value to
     /sys/devices/system/xen_memory/xen_memory0/target or
     /sys/devices/system/xen_memory/xen_memory0/target_kb on dumU,

  3) domU: for i in /sys/devices/system/memory/memory*/state; do \
             [ "`cat "$i"`" = offline ] && echo online > "$i"; done

Memory could be onlined automatically on domU by adding following line to
udev rules:

  SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /sys$devpath/state'"

In that case step 3 should be omitted.

Signed-off-by: Daniel Kiper 
Acked-by: Konrad Rzeszutek Wilk 
Cc: Ian Campbell 
Cc: Jeremy Fitzhardinge 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'stable/drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

2011-07-22T20:45:15+00:00

* 'stable/drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/pciback: Have 'passthrough' option instead of XEN_PCIDEV_BACKEND_PASS and XEN_PCIDEV_BACKEND_VPCI
  xen/pciback: Remove the DEBUG option.
  xen/pciback: Drop two backends, squash and cleanup some code.
  xen/pciback: Print out the MSI/MSI-X (PIRQ) values
  xen/pciback: Don't setup an fake IRQ handler for SR-IOV devices.
  xen: rename pciback module to xen-pciback.
  xen/pciback: Fine-grain the spinlocks and fix BUG: scheduling while atomic cases.
  xen/pciback: Allocate IRQ handler for device that is shared with guest.
  xen/pciback: Disable MSI/MSI-X when reseting a device
  xen/pciback: guest SR-IOV support for PV guest
  xen/pciback: Register the owner (domain) of the PCI device.
  xen/pciback: Cleanup the driver based on checkpatch warnings and errors.
  xen/pciback: xen pci backend driver.
  xen: tmem: self-ballooning and frontswap-selfshrinking
  xen: Add module alias to autoload backend drivers
  xen: Populate xenbus device attributes
  xen: Add __attribute__((format(printf... where appropriate
  xen: prepare tmem shim to handle frontswap
  xen: allow enable use of VGA console on dom0

Merge branch 'stable/xen-pciback-0.6.3' into stable/drivers

2011-07-20T19:33:51+00:00

* stable/xen-pciback-0.6.3:
  xen/pciback: Have 'passthrough' option instead of XEN_PCIDEV_BACKEND_PASS and XEN_PCIDEV_BACKEND_VPCI
  xen/pciback: Remove the DEBUG option.
  xen/pciback: Drop two backends, squash and cleanup some code.
  xen/pciback: Print out the MSI/MSI-X (PIRQ) values
  xen/pciback: Don't setup an fake IRQ handler for SR-IOV devices.
  xen: rename pciback module to xen-pciback.
  xen/pciback: Fine-grain the spinlocks and fix BUG: scheduling while atomic cases.
  xen/pciback: Allocate IRQ handler for device that is shared with guest.
  xen/pciback: Disable MSI/MSI-X when reseting a device
  xen/pciback: guest SR-IOV support for PV guest
  xen/pciback: Register the owner (domain) of the PCI device.
  xen/pciback: Cleanup the driver based on checkpatch warnings and errors.
  xen/pciback: xen pci backend driver.

Conflicts:
	drivers/xen/Kconfig

xen/pciback: Have 'passthrough' option instead of XEN_PCIDEV_BACKEND_PASS and XEN_PCIDEV_BACKEND_VPCI

2011-07-20T01:04:20+00:00

.. compile options. This way the user can decide during runtime whether they
want the default 'vpci' (virtual pci passthrough) or where the PCI devices
are passed in without any BDF renumbering. The option 'passthrough' allows
the user to toggle the it from 0 (vpci) to 1 (passthrough).

Signed-off-by: Konrad Rzeszutek Wilk