linux/drivers/xen
Konrad Rzeszutek Wilk 3066616ce2 xen/xenbus: Add quirk to deal with misconfigured backends.
A rather annoying and common case is when booting a PVonHVM guest
and exposing the PV KBD and PV VFB - as broken toolstacks don't
always initialize the backends correctly.

Normally The HVM guest is using the VGA driver and the emulated
keyboard for this (though upstream version of QEMU implements
PV KBD, but still uses a VGA driver). We provide a very basic
two-stage wait mechanism - where we wait for 30 seconds for all
devices, and then for 270 for all them except the two mentioned.

That allows us to wait for the essential devices, like network
or disk for the full 6 minutes.

To trigger this, put this in your guest config:

vfb = [ 'vnc=1, vnclisten=0.0.0.0 ,vncunused=1']

instead of this:
vnc=1
vnclisten="0.0.0.0"

CC: stable@kernel.org
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
[v3: Split delay in non-essential (30 seconds) and essential
 devices per Ian and Stefano suggestion]
[v4: Added comments per Stefano suggestion]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-04-19 12:45:01 -04:00
..
xen-pciback Two fixes for regressions: 2012-04-06 17:54:53 -07:00
xenbus xen/xenbus: Add quirk to deal with misconfigured backends. 2012-04-19 12:45:01 -04:00
xenfs xen: Add xenbus device driver 2011-12-16 13:29:39 -05:00
balloon.c xen/balloon: Avoid OOM when requesting highmem 2011-11-16 12:13:43 -05:00
biomerge.c xen: using EXPORT_SYMBOL requires including export.h 2012-01-18 15:37:49 -08:00
cpu_hotplug.c xen/bootup: During bootup suppress XENBUS: Unable to read cpu state 2012-02-03 16:05:30 -05:00
events.c xen: support pirq_eoi_map 2012-03-20 15:34:07 -04:00
evtchn.c xen/event: Add reference counting to event channels 2011-11-21 17:14:48 -05:00
features.c xen: clean up asm/xen/hypervisor.h 2008-12-16 21:50:31 +01:00
gntalloc.c xen-gntalloc: introduce missing kfree 2012-01-03 13:39:04 -05:00
gntdev.c xen/gntdev: do not set VM_PFNMAP 2012-04-17 13:27:17 -04:00
grant-table.c Merge commit 'c104f1fa1ecf4ee0fc06e31b1f77630b2551be81' into stable/for-linus-3.4 2012-04-18 15:52:50 -04:00
Kconfig xen/acpi: Fix Kconfig dependency on CPU_FREQ 2012-03-24 09:23:06 -04:00
Makefile xen/acpi-processor: C and P-state driver that uploads said data to hypervisor. 2012-03-14 12:35:42 -04:00
manage.c PM / Sleep: Introduce "late suspend" and "early resume" of devices 2012-01-29 20:38:29 +01:00
pci.c Merge branch 'stable/cleanups-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2011-11-06 20:13:34 -08:00
platform-pci.c xen: initialize platform-pci even if xen_emul_unplug=never 2012-03-22 11:37:11 -04:00
privcmd.c xen/privcmd: Remove unused support for arch specific privcmp mmap 2011-12-16 13:29:42 -05:00
privcmd.h xen: Add privcmd device driver 2011-12-16 13:29:31 -05:00
swiotlb-xen.c X86 & IA64: adapt for dma_map_ops changes 2012-03-28 16:36:31 +02:00
sys-hypervisor.c xen: constify all instances of "struct attribute_group" 2012-03-14 12:34:19 -04:00
tmem.c One tiny feature that accidentally got lost in the initial git pull: 2012-03-24 12:20:25 -07:00
xen-acpi-processor.c xen/acpi: Remove the WARN's as they just create noise. 2012-03-21 12:17:22 -04:00
xen-balloon.c Features: 2012-03-22 20:16:14 -07:00
xen-selfballoon.c xen: constify all instances of "struct attribute_group" 2012-03-14 12:34:19 -04:00
xencomm.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00