powerpc/mm/radix: Invalidate ERAT on tlbiel for POWER9 DD1

On POWER9 DD1, when we do a local TLB invalidate we also need to explicitly
invalidate the ERAT.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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

@@ -460,5 +460,6 @@
 
 #define PPC_SLBIA(IH)	stringify_in_c(.long PPC_INST_SLBIA | \
 				       ((IH & 0x7) << 21))
+#define PPC_INVALIDATE_ERAT	PPC_SLBIA(7)
 
 #endif /* _ASM_POWERPC_PPC_OPCODE_H */

arch/powerpc/mm/tlb-radix.c

@@ -50,6 +50,8 @@ 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_INVALIDATE_ERAT : : :"memory");
 	return;
 }
 
@@ -83,6 +85,8 @@ static inline void _tlbiel_va(unsigned long va, unsigned long pid,
 	asm volatile(PPC_TLBIEL(%0, %4, %3, %2, %1)
 		     : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
 	asm volatile("ptesync": : :"memory");
+	if (cpu_has_feature(CPU_FTR_POWER9_DD1))
+		asm volatile(PPC_INVALIDATE_ERAT : : :"memory");
 }
 
 static inline void _tlbie_va(unsigned long va, unsigned long pid,