Changes to make the resume from cpu_suspend() code behave more like
secondary boot caused debug exceptions to be unmasked early by
__cpu_setup(). We then go on to restore mdscr_el1 in cpu_do_resume(),
potentially taking break or watch points based on uninitialised registers.
Mask debug exceptions in cpu_do_resume(), which is specific to resume
from cpu_suspend(). Debug exceptions will be restored to their original
state by local_dbg_restore() in cpu_suspend(), which runs after
hw_breakpoint_restore() has re-initialised the other registers.
Reported-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Fixes:
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.. | ||
Makefile | ||
cache.S | ||
context.c | ||
copypage.c | ||
dma-mapping.c | ||
dump.c | ||
extable.c | ||
fault.c | ||
flush.c | ||
hugetlbpage.c | ||
init.c | ||
ioremap.c | ||
kasan_init.c | ||
mm.h | ||
mmap.c | ||
mmu.c | ||
numa.c | ||
pageattr.c | ||
pgd.c | ||
proc.S |