Introduce a helper which decides if a given pfn type has data
in the migration stream.
No change in behaviour intended, except for invalid page types which now
have a safer default.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Introduce a helper which decides if a given pfn in the migration
stream is backed by memory.
This highlights more clearly that type XEN_DOMCTL_PFINFO_XALLOC (a
synthetic toolstack-only type used between Xen 4.2 to 4.5 which
indicated a dirty page on the sending side for which no data will be
send in the initial iteration) does get populated in the VM.
No change in behaviour intended, except for invalid page types which now
have a safer default.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Users of xc_get_pfn_type_batch may want to sanity check the data
returned by Xen. Add helpers for this purpose:
is_known_page_type verifies the type returned by Xen on the saving
side, or the incoming type for a page on the restoring side, is known
by the save/restore code.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
After 32-bit PV-guests have been security de-supported when not running
under PV-shim, the hypervisor will no longer be configured to support
those domains per default when not being built as PV-shim.
Unfortunately libxenguest will fail saving or restoring a PV domain
due to this restriction, as it is trying to get the compat MFN list
even for 64 bit guests.
Fix that by obtaining the compat MFN list only for 32-bit PV guests.
Fixes: 1a0f2fe229 ("SUPPORT.md: Un-shimmed 32-bit PV guests are no longer supported")
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Today xenctrl_dom.h is part of libxenctrl as it is included by
xc_private.c. This seems not to be needed, so merge xenctrl_dom.h into
xenguest.h where its contents really should be.
Replace all #includes of xenctrl_dom.h by xenguest.h ones or drop them
if xenguest.h is already included.
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wl@xen.org>
tools/libxc now contains libxenguest only. Move it to tools/libs/guest.
When generating the pkg-config file for libxenguest a filter is now
required for replacing "xenctrl" by "xencontrol" in the
"Requires.private:" entry. Add this filter to tools/libs/libs.mk.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org> (stubdom parts)
Alejandro Vallejo
Olaf Hering
Juergen Gross