Re: [PATCH v2] powerpc/mm/radix: Invalidate ERAT on tlbiel for POWER9 DD1
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2016-11-16 10:51:51
Michael Neuling [off-list ref] writes:
quoted hunk ↗ jump to hunk
diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c index bda8c43be7..4a19cdd8a0 100644 --- a/arch/powerpc/mm/tlb-radix.c +++ b/arch/powerpc/mm/tlb-radix.c@@ -50,6 +50,9 @@ static inline void _tlbiel_pid(unsigned long pid, unsigned long ric) for (set = 0; set < POWER9_TLB_SETS_RADIX ; set++) { __tlbiel_pid(pid, set, ric); } + if (cpu_has_feature(CPU_FTR_POWER9_DD1)) + asm volatile(PPC_SLBIA(0x7) + : : :"memory");
Ah of course I'll use slbia to invalidate the ERAT. How about we do: #define PPC_INVALIDATE_ERAT PPC_SLBIA(0x7) Or bike-shed me a name for it. cheers