powerpc/book3e: Resend doorbell exceptions to ourself
If we are soft disabled and receive a doorbell exception we don't process it immediately. This means we need to check on the way out of irq restore if there are any doorbell exceptions to process. The problem is at that point we don't know what our regs are, and that in turn makes xmon unhappy. To workaround the problem, instead of checking for and processing doorbells, we check for any doorbells and if there were any we send ourselves another. Signed-off-by: NMichael Ellerman <michael@ellerman.id.au> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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