MIPS: mm: Use the TLBINVF instruction to flush the VTLB

[firefly-linux-kernel-4.4.55.git] / arch / mips / mm / tlb-r4k.c

diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index 363aa0343bbe398357aeea21cfa9850fedc83987..427dcacca586b9931fc5d85856fc5cff23a2e5ce 100644 (file)
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -83,13 +83,19 @@ void local_flush_tlb_all(void)
        entry = read_c0_wired();
 
        /* Blast 'em all away. */
-       while (entry < current_cpu_data.tlbsize) {
-               /* Make sure all entries differ. */
-               write_c0_entryhi(UNIQUE_ENTRYHI(entry));
-               write_c0_index(entry);
+       if (cpu_has_tlbinv && current_cpu_data.tlbsize) {
+               write_c0_index(0);
                mtc0_tlbw_hazard();
-               tlb_write_indexed();
-               entry++;
+               tlbinvf();  /* invalidate VTLB */
+       } else {
+               while (entry < current_cpu_data.tlbsize) {
+                       /* Make sure all entries differ. */
+                       write_c0_entryhi(UNIQUE_ENTRYHI(entry));
+                       write_c0_index(entry);
+                       mtc0_tlbw_hazard();
+                       tlb_write_indexed();
+                       entry++;
+               }
        }
        tlbw_use_hazard();
        write_c0_entryhi(old_ctx);