Nicholas Piggin
6fdb0f410b
powerpc/64: add context tracking to asynchronous interrupts
...
Previously context tracking was not done for asynchronous interrupts,
(those that run in interrupt context), and if those would cause a
reschedule when they exit, then scheduling functions (schedule_user,
preempt_schedule_irq) call exception_enter/exit to fix this up and
exit user context.
This is a hack we would like to get away from, so do context tracking
for asynchronous interrupts too.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com >
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au >
Link: https://lore.kernel.org/r/20210130130852.2952424-34-npiggin@gmail.com
2021-02-09 00:10:48 +11:00
Nicholas Piggin
540d4d34be
powerpc/64: context tracking move to interrupt wrappers
...
This moves exception_enter/exit calls to wrapper functions for
synchronous interrupts. More interrupt handlers are covered by
this than previously.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com >
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au >
Link: https://lore.kernel.org/r/20210130130852.2952424-33-npiggin@gmail.com
2021-02-09 00:10:46 +11:00
Nicholas Piggin
e6f8a6c86c
powerpc: add interrupt_cond_local_irq_enable helper
...
Simple helper for synchronous interrupt handlers (i.e., process-context)
to enable interrupts if it was taken in an interrupts-enabled context.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com >
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au >
Link: https://lore.kernel.org/r/20210130130852.2952424-30-npiggin@gmail.com
2021-02-09 00:02:12 +11:00
Nicholas Piggin
3a96570ffc
powerpc: convert interrupt handlers to use wrappers
...
Signed-off-by: Nicholas Piggin <npiggin@gmail.com >
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au >
Link: https://lore.kernel.org/r/20210130130852.2952424-29-npiggin@gmail.com
2021-02-09 00:02:12 +11:00
Nicholas Piggin
25b7e6bb74
powerpc: add interrupt wrapper entry / exit stub functions
...
These will be used by subsequent patches.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com >
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au >
Link: https://lore.kernel.org/r/20210130130852.2952424-28-npiggin@gmail.com
2021-02-09 00:02:12 +11:00
Nicholas Piggin
8d41fc618a
powerpc: interrupt handler wrapper functions
...
Add wrapper functions (derived from x86 macros) for interrupt handler
functions. This allows interrupt entry code to be written in C.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com >
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au >
Link: https://lore.kernel.org/r/20210130130852.2952424-27-npiggin@gmail.com
2021-02-09 00:02:11 +11:00
