Re: [PATCH v8 08/26] arm64: Make PMR part of task context

[Catalin Marinas]

On Tue, Jan 08, 2019 at 02:07:26PM +0000, Julien Thierry wrote:
> 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 <julien.thierry@xxxxxxx>
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Will Deacon <will.deacon@xxxxxxx>
> Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
> Cc: Dave Martin <Dave.Martin@xxxxxxx>

Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>