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| author | Ian Munsie <imunsie@au1.ibm.com> | 2012-11-14 22:49:50 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-01-10 08:09:08 +0400 |
| commit | e5e84f0a66e0dedba92f881c2dec787dbd8619d5 (patch) | |
| tree | 39944b8696f8a164dbf600d875788c79a1b87386 /arch/powerpc/platforms/pseries/Kconfig | |
| parent | 440bc685532fd17c16ec2a3aae2c7877d30b7942 (diff) | |
| download | linux-e5e84f0a66e0dedba92f881c2dec787dbd8619d5.tar.xz | |
powerpc: Hook up doorbells on server
This patch actually hooks up doorbell interrupts on POWER8:
- Select the PPC_DOORBELL Kconfig option from PPC_PSERIES
- Add the doorbell CPU feature bit to POWER8
- We define a new pSeries_cause_ipi_mux() function that issues a
doorbell interrupt if the recipient is another thread within the same
core as the sender. If the recipient is in a different core it falls
back to using XICS to deliver the IPI as before.
- During pSeries_smp_probe() at boot, we check if doorbell interrupts
are supported. If they are we set the cause_ipi function pointer to
the above mentioned function, otherwise we leave it as whichever XICS
cause_ipi function was determined by xics_smp_probe().
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Tested-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/pseries/Kconfig')
| -rw-r--r-- | arch/powerpc/platforms/pseries/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig index 837cf49357ed..9a0941bc4d31 100644 --- a/arch/powerpc/platforms/pseries/Kconfig +++ b/arch/powerpc/platforms/pseries/Kconfig @@ -17,6 +17,7 @@ config PPC_PSERIES select PPC_NATIVE select PPC_PCI_CHOICE if EXPERT select ZLIB_DEFLATE + select PPC_DOORBELL default y config PPC_SPLPAR |