Vitaly Kuznetsov 919845cb33 x86/xen: Support kexec/kdump in HVM guests by doing a soft reset ... commit 0b34a166f2 upstream. Currently there is a number of issues preventing PVHVM Xen guests from doing successful kexec/kdump: - Bound event channels. - Registered vcpu_info. - PIRQ/emuirq mappings. - shared_info frame after XENMAPSPACE_shared_info operation. - Active grant mappings. Basically, newly booted kernel stumbles upon already set up Xen interfaces and there is no way to reestablish them. In Xen-4.7 a new feature called 'soft reset' is coming. A guest performing kexec/kdump operation is supposed to call SCHEDOP_shutdown hypercall with SHUTDOWN_soft_reset reason before jumping to new kernel. Hypervisor (with some help from toolstack) will do full domain cleanup (but keeping its memory and vCPU contexts intact) returning the guest to the state it had when it was first booted and thus allowing it to start over. Doing SHUTDOWN_soft_reset on Xen hypervisors which don't support it is probably OK as by default all unknown shutdown reasons cause domain destroy with a message in toolstack log: 'Unknown shutdown reason code 5. Destroying domain.' which gives a clue to what the problem is and eliminates false expectations. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-10-22 14:37:50 -07:00
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hvm	Feature:	2012-10-12 22:20:28 +09:00
io	xen-netback: coalesce slots in TX path and fix regressions	2013-04-22 15:37:01 -04:00
callback.h	UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers	2012-10-02 18:01:25 +01:00
elfnote.h	Fix common misspellings	2011-03-31 11:26:23 -03:00
event_channel.h	xen: Add EVTCHNOP_reset in Xen interface header files.	2012-12-17 21:58:05 -05:00
features.h	xen/arm: get privilege status	2012-08-08 17:20:18 +00:00
grant_table.h	xen: grant: use xen_pfn_t type for frame_list.	2012-10-19 15:17:55 -04:00
memory.h	xen: implement updated XENMEM_add_to_physmap_range ABI	2013-02-19 22:01:55 -05:00
physdev.h	xen-pciback: notify hypervisor about devices intended to be assigned to guests	2013-03-22 10:20:55 -04:00
platform.h	xen/acpi: ACPI cpu hotplug	2013-02-19 22:02:29 -05:00
sched.h	x86/xen: Support kexec/kdump in HVM guests by doing a soft reset	2015-10-22 14:37:50 -07:00
vcpu.h	xen: add missing definitions in include/xen/interface/vcpu.h which ia64/xen needs	2008-04-24 23:57:32 +02:00
version.h	xen/acpi: Move the xen_running_on_version_or_later function.	2012-11-28 14:39:31 -05:00
xen-mca.h	xen/mce: Add mcelog support for Xen platform	2012-07-19 15:51:36 -04:00
xen.h	xen: event channel arrays are xen_ulong_t and not unsigned long	2013-02-20 08:45:07 -05:00
xencomm.h	xen: import arch generic part of xencomm	2008-04-24 23:57:32 +02:00