> On 08-Jul-2020, at 4:45 PM, Michael Ellerman <m...@ellerman.id.au> wrote: > > Athira Rajeev <atraj...@linux.vnet.ibm.com > <mailto:atraj...@linux.vnet.ibm.com>> writes: >> From: Madhavan Srinivasan <ma...@linux.ibm.com> >> >> Add power10 feature function to dt_cpu_ftrs.c along >> with a power10 specific init() to initialize pmu sprs. >> >> Signed-off-by: Madhavan Srinivasan <ma...@linux.ibm.com> >> --- >> arch/powerpc/include/asm/reg.h | 3 +++ >> arch/powerpc/kernel/cpu_setup_power.S | 7 +++++++ >> arch/powerpc/kernel/dt_cpu_ftrs.c | 26 ++++++++++++++++++++++++++ >> 3 files changed, 36 insertions(+) >> >> diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h >> index 21a1b2d..900ada1 100644 >> --- a/arch/powerpc/include/asm/reg.h >> +++ b/arch/powerpc/include/asm/reg.h >> @@ -1068,6 +1068,9 @@ >> #define MMCR0_PMC2_LOADMISSTIME 0x5 >> #endif >> >> +/* BHRB disable bit for PowerISA v3.10 */ >> +#define MMCRA_BHRB_DISABLE 0x0000002000000000 >> + >> /* >> * SPRG usage: >> * >> diff --git a/arch/powerpc/kernel/cpu_setup_power.S >> b/arch/powerpc/kernel/cpu_setup_power.S >> index efdcfa7..e8b3370c 100644 >> --- a/arch/powerpc/kernel/cpu_setup_power.S >> +++ b/arch/powerpc/kernel/cpu_setup_power.S >> @@ -233,3 +233,10 @@ __init_PMU_ISA207: >> li r5,0 >> mtspr SPRN_MMCRS,r5 >> blr >> + >> +__init_PMU_ISA31: >> + li r5,0 >> + mtspr SPRN_MMCR3,r5 >> + LOAD_REG_IMMEDIATE(r5, MMCRA_BHRB_DISABLE) >> + mtspr SPRN_MMCRA,r5 >> + blr > > This doesn't seem like it belongs in this patch. It's not called?
Yes, you are right, this needs to be called from `__setup_cpu_power10`. Since we didn’t had setup part for power10 in the tree initially, missed it. I will include this update in V3 Thanks Athira > > cheers