From 26f46189276789b399ddab4ed791dfdaa2440123 Mon Sep 17 00:00:00 2001 From: Leonid Yegoshin Date: Thu, 14 Nov 2013 16:12:30 +0000 Subject: [PATCH] MIPS: mm: Use the TLBINVF instruction to flush the VTLB The TLBINVF instruction can be used to flush the entire VTLB. This eliminates the need for the TLBWI loop and improves performance. Reviewed-by: Paul Burton Signed-off-by: Leonid Yegoshin Signed-off-by: Markos Chandras Acked-by: John Crispin Patchwork: http://patchwork.linux-mips.org/patch/6138/ --- arch/mips/mm/tlb-r4k.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c index 363aa0343bbe..427dcacca586 100644 --- 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); -- 2.39.5