diff options
| author | Dave Martin <Dave.Martin@arm.com> | 2020-03-16 16:50:51 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-03-16 17:19:49 +0000 |
| commit | 0537c4cd71e3c729c278c82f5b088460fb66fc33 (patch) | |
| tree | 0200b41d14892d1bc98ae1ca6083361c244e8c3a /arch/arm64 | |
| parent | d2c2ee4cc33bea814eb6739f14d8cb6a4b5265bb (diff) | |
arm64: BTI: Reset BTYPE when skipping emulated instructions
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: Mark Brown <broonie@kernel.org>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/kernel/traps.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 3c986c8ca204..10d6451b2776 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -340,6 +340,8 @@ void arm64_skip_faulting_instruction(struct pt_regs *regs, unsigned long size) if (compat_user_mode(regs)) advance_itstate(regs); + else + regs->pstate &= ~PSR_BTYPE_MASK; } static LIST_HEAD(undef_hook); |