powerpc/powernv: POWER9 support for msgsnd/doorbell IPI

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POWER9 requires msgsync for receiver-side synchronization, and a DD1
workaround restricts IPIs to core-local.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Drop no longer needed asm feature macro changes]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Nicholas Piggin 2017-04-13 20:16:24 +10:00 • committed by Michael Ellerman

parent a5adf28246

commit 6b3edefefa

3 changed files with 31 additions and 2 deletions

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3

arch/powerpc/include/asm/dbell.h

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2

arch/powerpc/include/asm/ppc-opcode.h

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28

arch/powerpc/platforms/powernv/smp.c

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