Don't share privregs with hvm domain and twist IA64 xen dump core format
slightly. Xen shares privregs pages with IA64 HVM domain for xm dump-core
to dump the pages. However sharing the page allows hvm guest domain
peek/destroy the page contents that might cause xen crash. And the xen
dump core file doesn't need privregs page because cpu context should be
obtained from vcpu context in case of IA64 HVM domain.
Although this patch modify xen dump core format, current crash utility
(at least crash 4.0-4.7) doesn't look into .xen_ia64_mmapped_regs section
and I don't know any other tools to understand xen dump core file.
So this format modification doesn't cause incompatibility issue.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
So far the order isn't specified and may be random in theory.
But sorted array is requested by crash utility for efficient search.
Fortunately it is the case except ia64 full virtualized domain.
Update document such that those array must be sorted and fix the ia64
full virtualized domain case.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Keir Fraser
Alex Williamson
kfraser@localhost.localdomain
Keir Fraser