arm64: Make PMR part of task context

In order to replace PSR.I interrupt disabling/enabling with ICC_PMR_EL1
interrupt masking, ICC_PMR_EL1 needs to be saved/restored when
taking/returning from an exception. This mimics the way hardware saves
and restores PSR.I bit in spsr_el1 for exceptions and ERET.

Add PMR to the registers to save in the pt_regs struct upon kernel entry,
and restore it before ERET. Also, initialize it to a sane value when
creating new tasks.

Signed-off-by: Julien Thierry <[email protected]>
Reviewed-by: Catalin Marinas <[email protected]>
Reviewed-by: Marc Zyngier <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Dave Martin <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>

0 files changed, 0 insertions, 0 deletions