[v2] powerpc/64s: make PACA_IRQ_HARD_DIS track MSR[EE] closely

[Michael Ellerman]

On Sun, 2018-06-03 at 12:24:32 UTC, Nicholas Piggin wrote:
> When the masked interrupt handler clears MSR[EE] for an interrupt in
> the PACA_IRQ_MUST_HARD_MASK set, it does not set PACA_IRQ_HARD_DIS.
> This makes them get out of synch.
> 
> With that taken into account, it's only low level irq manipulation
> (and interrupt entry before reconcile) where they can be out of synch.
> This makes the code less surprising.
> 
> It also allows the IRQ replay code to rely on the IRQ_HARD_DIS value
> and not have to mtmsrd again in this case (e.g., for an external
> interrupt that has been masked). The bigger benefit might just be
> that there is not such an element of surprise in these two bits of
> state.
> 
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/9b81c0211c249c1bc8caec2ddbc86e

cheers