powerpc: Add support for setting SPRN_TIDR

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We need the SPRN_TIDR to be set for use with fast thread-wakeup (core-
to-core wakeup) and also with CAPI.

Each thread in a process needs to have a unique id within the process.
But for now, we assign globally unique thread ids to all threads in
the system.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Philippe Bergheaud <felix@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
[mpe: Simplify tidr clearing on fork() and ctx switch code]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Sukadev Bhattiprolu 2017-11-07 18:23:53 -08:00 • committed by Michael Ellerman

parent ece4e51291

commit ec233ede4c

3 changed files with 120 additions and 0 deletions

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1

arch/powerpc/include/asm/processor.h

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3

arch/powerpc/include/asm/switch_to.h

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116

arch/powerpc/kernel/process.c

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