linux/include/xen/interface
Olaf Hering 254d1a3f02 xen/pv-on-hvm kexec: shutdown watches from old kernel
Add xs_reset_watches function to shutdown watches from old kernel after
kexec boot.  The old kernel does not unregister all watches in the
shutdown path.  They are still active, the double registration can not
be detected by the new kernel.  When the watches fire, unexpected events
will arrive and the xenwatch thread will crash (jumps to NULL).  An
orderly reboot of a hvm guest will destroy the entire guest with all its
resources (including the watches) before it is rebuilt from scratch, so
the missing unregister is not an issue in that case.

With this change the xenstored is instructed to wipe all active watches
for the guest.  However, a patch for xenstored is required so that it
accepts the XS_RESET_WATCHES request from a client (see changeset
23839:42a45baf037d in xen-unstable.hg). Without the patch for xenstored
the registration of watches will fail and some features of a PVonHVM
guest are not available. The guest is still able to boot, but repeated
kexec boots will fail.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-07-19 15:52:02 -04:00
..
hvm hvc_xen: support PV on HVM consoles 2012-03-13 19:23:32 -04:00
io xen/pv-on-hvm kexec: shutdown watches from old kernel 2012-07-19 15:52:02 -04:00
callback.h
elfnote.h Fix common misspellings 2011-03-31 11:26:23 -03:00
event_channel.h
features.h xen: support GSI -> pirq remapping in PV on HVM guests 2010-10-22 21:25:42 +01:00
grant_table.h xen/granttable: Introducing grant table V2 stucture 2011-11-22 09:23:44 -05:00
memory.h xen: implement XENMEM_machphys_mapping 2010-11-12 15:00:06 -08:00
physdev.h xen: support pirq_eoi_map 2012-03-20 15:34:07 -04:00
platform.h xen/pcpu: Xen physical cpus online/offline sys interface 2012-07-19 15:51:39 -04:00
sched.h watchdog: Xen watchdog driver 2011-03-15 16:02:18 +00:00
vcpu.h
version.h
xen-mca.h xen/mce: Add mcelog support for Xen platform 2012-07-19 15:51:36 -04:00
xen.h xen/pcpu: Xen physical cpus online/offline sys interface 2012-07-19 15:51:39 -04:00
xencomm.h