Currently there are many offenders of the unaligned access checks, which makes booting with the unaligned check a PVH Dom0 impossible.
The main offenders seem to be the ACPI code, the VMX code and specially the intremap code (set_ire_sid). Signed-off-by: Roger Pau Monné <[email protected]> --- Cc: Andrew Cooper <[email protected]> Cc: George Dunlap <[email protected]> Cc: Ian Jackson <[email protected]> Cc: Jan Beulich <[email protected]> Cc: Konrad Rzeszutek Wilk <[email protected]> Cc: Stefano Stabellini <[email protected]> Cc: Tim Deegan <[email protected]> Cc: Wei Liu <[email protected]> Cc: Julien Grall <[email protected]> --- I'm not sure whether we prefer to fix the offenders, or just disable the alignment wholesale. In any case if we decide to disable the check, the patch should have vary low impact, and hence should be committed to 4.10 on the base that it only affects ubsan, which is not enabled by default and not to be used on production systems. --- xen/Rules.mk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/Rules.mk b/xen/Rules.mk index 2659f8a4d1..1472adf1d6 100644 --- a/xen/Rules.mk +++ b/xen/Rules.mk @@ -120,7 +120,7 @@ $(filter-out %.init.o $(nogcov-y),$(obj-y) $(obj-bin-y) $(extra-y)): CFLAGS += - endif ifeq ($(CONFIG_UBSAN),y) -$(filter-out %.init.o $(noubsan-y),$(obj-y) $(obj-bin-y) $(extra-y)): CFLAGS += -fsanitize=undefined +$(filter-out %.init.o $(noubsan-y),$(obj-y) $(obj-bin-y) $(extra-y)): CFLAGS += -fsanitize=undefined -fno-sanitize=alignment endif ifeq ($(CONFIG_LTO),y) -- 2.13.5 (Apple Git-94) _______________________________________________ Xen-devel mailing list [email protected] https://lists.xen.org/xen-devel
