[src/trunk]: src/sys/uvm/pmap When adjusting the max ASID count, check if ti-...

[simonb <simonb%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ad60872db127
branches:  trunk
changeset: 990442:ad60872db127
user:      simonb <simonb%NetBSD.org@localhost>
date:      Wed Oct 27 05:33:59 2021 +0000

description:
When adjusting the max ASID count, check if ti->ti_asid_max == 0 as
well.  This defaults to 0 for the non-PMAP_TLB_NUM_PIDS case, so would
skip the updated test.

Fix for port-pmax/56466 (which affects all MIPS).

ok srkll@

diffstat:

 sys/uvm/pmap/pmap_tlb.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 8384f4343b36 -r ad60872db127 sys/uvm/pmap/pmap_tlb.c
--- a/sys/uvm/pmap/pmap_tlb.c   Wed Oct 27 05:18:51 2021 +0000
+++ b/sys/uvm/pmap/pmap_tlb.c   Wed Oct 27 05:33:59 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap_tlb.c,v 1.47 2021/10/08 07:17:32 skrll Exp $      */
+/*     $NetBSD: pmap_tlb.c,v 1.48 2021/10/27 05:33:59 simonb Exp $     */
 
 /*-
  * Copyright (c) 2010 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(0, "$NetBSD: pmap_tlb.c,v 1.47 2021/10/08 07:17:32 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap_tlb.c,v 1.48 2021/10/27 05:33:59 simonb Exp $");
 
 /*
  * Manages address spaces in a TLB.
@@ -379,7 +379,7 @@
 #endif
 
        const tlb_asid_t asid_max = pmap_md_tlb_asid_max();
-       if (asid_max < ti->ti_asid_max) {
+       if (ti->ti_asid_max == 0 || asid_max < ti->ti_asid_max) {
                ti->ti_asid_max = asid_max;
                ti->ti_asids_free = TLBINFO_ASID_INITIAL_FREE(ti->ti_asid_max);
        }