[src/trunk]: src/sys/arch/mips/mips fix lp64 kvm access for many kernel addre...

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

details:   https://anonhg.NetBSD.org/src/rev/f73286251395
branches:  trunk
changeset: 819893:f73286251395
user:      mrg <mrg%NetBSD.org@localhost>
date:      Thu Dec 22 07:56:38 2016 +0000

description:
fix lp64 kvm access for many kernel addresses.
in mm_md_kernacc() allow an address if it matches MIPS_KSEG0_P().

now a static n64 kvm-using binary runs sanely on an n64 kernel.
(dynamic n64 has problems with non-trivial programs.)

ok matt@.

diffstat:

 sys/arch/mips/mips/mips_machdep.c |  7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diffs (28 lines):

diff -r 339c0f1587a0 -r f73286251395 sys/arch/mips/mips/mips_machdep.c
--- a/sys/arch/mips/mips/mips_machdep.c Thu Dec 22 04:54:54 2016 +0000
+++ b/sys/arch/mips/mips/mips_machdep.c Thu Dec 22 07:56:38 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mips_machdep.c,v 1.274 2016/07/30 05:55:34 matt Exp $  */
+/*     $NetBSD: mips_machdep.c,v 1.275 2016/12/22 07:56:38 mrg Exp $   */
 
 /*
  * Copyright 2002 Wasabi Systems, Inc.
@@ -111,7 +111,7 @@
  */
 
 #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
-__KERNEL_RCSID(0, "$NetBSD: mips_machdep.c,v 1.274 2016/07/30 05:55:34 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mips_machdep.c,v 1.275 2016/12/22 07:56:38 mrg Exp $");
 
 #define __INTR_PRIVATE
 #include "opt_cputype.h"
@@ -2427,7 +2427,8 @@
            mips_round_page(MSGBUFSIZE))) {
                return EFAULT;
        }
-       if (MIPS_XKSEG_P(v) && v < MIPS_KSEG0_START) {
+       if (MIPS_KSEG0_P(v) ||
+           (MIPS_XKSEG_P(v) && v < MIPS_KSEG0_START)) {
                *handled = true;
                return 0;
        }