parisc: Flush ITLB in flush_tlb_all_local() only on split TLB machines

flush_tlb_all_local() flushes the ITLB and DTLB of the CPU. In case the machine does not have separate ITLBs and DTLBs, use the alternative functionality to replace the code which flushes the ITLB with nops while keeping the code which flushes the DTLB. Signed-off-by: Helge Deller <[email protected]>
jb55 · Jul 21, 2019 · 69245c9 · 69245c9
1 parent f5e03d3
commit 69245c9
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S
@@ -63,7 +63,7 @@ ENTRY_CFI(flush_tlb_all_local)
 
 	/* Flush Instruction Tlb */
 
-	LDREG		ITLB_SID_BASE(%r1), %r20
+88:	LDREG		ITLB_SID_BASE(%r1), %r20
 	LDREG		ITLB_SID_STRIDE(%r1), %r21
 	LDREG		ITLB_SID_COUNT(%r1), %r22
 	LDREG		ITLB_OFF_BASE(%r1), %arg0
@@ -103,6 +103,7 @@ fitonemiddle:					/* Loop if LOOP = 1 */
 	add		%r21, %r20, %r20		/* increment space */
 
 fitdone:
+	ALTERNATIVE(88b, fitdone, ALT_COND_NO_SPLIT_TLB, INSN_NOP)
 
 	/* Flush Data Tlb */