[src/trunk]: src/sys/arch/arm/arm32 Add pmap locking to pmap_kenter_pa/kremove

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

details:   https://anonhg.NetBSD.org/src/rev/f2fa8cd7ea76
branches:  trunk
changeset: 337371:f2fa8cd7ea76
user:      matt <matt%NetBSD.org@localhost>
date:      Mon Apr 13 16:19:42 2015 +0000

description:
Add pmap locking to pmap_kenter_pa/kremove

diffstat:

 sys/arch/arm/arm32/pmap.c |  9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diffs (51 lines):

diff -r 72e6a89f4ae0 -r f2fa8cd7ea76 sys/arch/arm/arm32/pmap.c
--- a/sys/arch/arm/arm32/pmap.c Mon Apr 13 16:03:51 2015 +0000
+++ b/sys/arch/arm/arm32/pmap.c Mon Apr 13 16:19:42 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.319 2015/04/11 15:21:33 skrll Exp $ */
+/*     $NetBSD: pmap.c,v 1.320 2015/04/13 16:19:42 matt Exp $  */
 
 /*
  * Copyright 2003 Wasabi Systems, Inc.
@@ -216,7 +216,7 @@
 
 #include <arm/locore.h>
 
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.319 2015/04/11 15:21:33 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.320 2015/04/13 16:19:42 matt Exp $");
 
 //#define PMAP_DEBUG
 #ifdef PMAP_DEBUG
@@ -3671,6 +3671,7 @@
        }
 
        pmap_t kpm = pmap_kernel();
+       pmap_acquire_pmap_lock(kpm);
        struct l2_bucket * const l2b = pmap_get_l2_bucket(kpm, va);
        const size_t l1slot __diagused = l1pte_index(va);
        KASSERTMSG(l2b != NULL,
@@ -3718,6 +3719,7 @@
                        cpu_cpwait();
                }
        }
+       pmap_release_pmap_lock(kpm);
 
        pt_entry_t npte = L2_S_PROTO | pa | L2_S_PROT(PTE_KERNEL, prot)
            | ((flags & PMAP_NOCACHE)
@@ -3814,6 +3816,8 @@
 
        const vaddr_t eva = va + len;
 
+       pmap_acquire_pmap_lock(pmap_kernel());
+
        while (va < eva) {
                vaddr_t next_bucket = L2_NEXT_BUCKET_VA(va);
                if (next_bucket > eva)
@@ -3875,6 +3879,7 @@
                total_mappings += mappings;
 #endif
        }
+       pmap_release_pmap_lock(pmap_kernel());
        cpu_cpwait();
        UVMHIST_LOG(maphist, "  <--- done (%u mappings removed)",
            total_mappings, 0, 0, 0);