diff options
| 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/include | |
| 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/include')
| -rw-r--r-- | arch/powerpc/include/asm/cputable.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h index 76f81bd64f1d..fc4d2c5b6522 100644 --- a/arch/powerpc/include/asm/cputable.h +++ b/arch/powerpc/include/asm/cputable.h @@ -408,7 +408,8 @@ extern const char *powerpc_base_platform; CPU_FTR_PURR | CPU_FTR_SPURR | CPU_FTR_REAL_LE | \ CPU_FTR_DSCR | CPU_FTR_SAO | \ CPU_FTR_STCX_CHECKS_ADDRESS | CPU_FTR_POPCNTB | CPU_FTR_POPCNTD | \ - CPU_FTR_ICSWX | CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY) + CPU_FTR_ICSWX | CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \ + CPU_FTR_DBELL) #define CPU_FTRS_CELL (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \ CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \ CPU_FTR_ALTIVEC_COMP | CPU_FTR_MMCRA | CPU_FTR_SMT | \ |