Since normal execution of any non-branch instruction resets the
PSTATE BTYPE field to 0, so do the same thing when emulating a
trapped instruction.
Branches don't trap directly, so we should never need to assign a
non-zero value to BTYPE here.
Signed-off-by: Dave Martin <dave.mar...@arm.com>
---
Changes since v2:
* Drop (u64) case when masking out PSR_BTYPE_MASK in
arm64_skip_faulting_instruction().
PSTATE may grow, but we should address this more generally rather
than with point hacks in this series.
---
arch/arm64/kernel/traps.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 3af2768..5c46a7b 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -331,6 +331,8 @@ void arm64_skip_faulting_instruction(struct pt_regs *regs,
unsigned long size)
if (regs->pstate & PSR_MODE32_BIT)
advance_itstate(regs);
+ else
+ regs->pstate &= ~PSR_BTYPE_MASK;
}
static LIST_HEAD(undef_hook);
--
2.1.4
