Vitaly Kuznetsov 6cdd2beb9a 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 14:43:14 -07:00
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interface	x86/xen: Support kexec/kdump in HVM guests by doing a soft reset	2015-10-22 14:43:14 -07:00
acpi.h	xen / ACPI: notify xen when reduced hardware sleep is available	2013-07-31 14:22:35 +02:00
balloon.h	xen/balloon: set a mapping for ballooned out pages	2013-08-09 11:23:24 -04:00
events.h	xen/events: don't bind non-percpu VIRQs with percpu chip	2015-05-19 19:55:36 +01:00
features.h	xen: Core Xen implementation	2007-07-18 08:47:42 -07:00
grant_table.h	xen/grant: introduce func gnttab_unmap_refs_sync()	2015-04-27 11:41:12 +01:00
hvc-console.h	treewide: use __printf not __attribute__((format(printf,...)))	2011-10-31 17:30:54 -07:00
hvm.h	xen: Convert printks to pr_<level>	2013-06-28 11:19:58 -04:00
page.h	xen: add page_to_mfn()	2015-01-14 00:22:00 -05:00
platform_pci.h	xen/pvhvm: Remove the xen_platform_pci int.	2014-01-03 14:54:53 -05:00
swiotlb-xen.h	Merge remote-tracking branch 'stefano/swiotlb-xen-9.1' into stable/for-linus-3.13	2013-11-08 16:10:48 -05:00
tmem.h	xen: tmem: enable Xen tmem shim to be built/loaded as a module	2013-04-30 17:04:01 -07:00
xen-ops.h	xen: Suspend ticks on all CPUs during suspend	2015-04-29 17:10:05 +01:00
xen.h	xen/pvh/x86: Define what an PVH guest is (v3).	2014-01-06 10:43:58 -05:00
xenbus.h	xenbus_client: Extend interface to support multi-page ring	2015-04-15 10:56:47 +01:00
xenbus_dev.h	xenbus: Add support for xenbus backend in stub domain	2012-05-21 09:53:18 -04:00