arm64: entry: mask DAIF before returning from C EL1 handlers

Most EL1 exceptions already call local_daif_mask() before returning,
with the exception of debug exception handlers which do not change
DAIF, and the IRQ/FIQ/Error handlers.

However, DAIF get masked in kernel_exit() in all cases when returning
from EL1 C handlers anyway.

Move this masking from assembly to C by calling local_daif_mask()
before irqentry_nmi_exit(). Unlike the raw DAIF masking helper,
local_daif_mask() invokes trace_hardirqs_off(), so it must execute
while RCU is still watching.

Remove the disable_daif assembly macro, as this was its only use.

Signed-off-by: Ada Couprie Diaz <ada.coupriediaz@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: Will Deacon <will@kernel.org>

0 files changed, 0 insertions, 0 deletions