svn commit: r322063 - stable/10/sys/amd64/amd64
Marius Strobl
marius at FreeBSD.org
Fri Aug 4 21:38:35 UTC 2017
Author: marius
Date: Fri Aug 4 21:38:34 2017
New Revision: 322063
URL: https://svnweb.freebsd.org/changeset/base/322063
Log:
MFC: r290156, r318354
pmap_change_attr: Only fixup DMAP for DMAPed ranges
Modified:
stable/10/sys/amd64/amd64/pmap.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/amd64/amd64/pmap.c
==============================================================================
--- stable/10/sys/amd64/amd64/pmap.c Fri Aug 4 21:06:47 2017 (r322062)
+++ stable/10/sys/amd64/amd64/pmap.c Fri Aug 4 21:38:34 2017 (r322063)
@@ -6559,7 +6559,7 @@ pmap_change_attr_locked(vm_offset_t va, vm_size_t size
*/
for (tmpva = base; tmpva < base + size; ) {
pdpe = pmap_pdpe(kernel_pmap, tmpva);
- if (*pdpe == 0)
+ if (pdpe == NULL || *pdpe == 0)
return (EINVAL);
if (*pdpe & PG_PS) {
/*
@@ -6632,7 +6632,8 @@ pmap_change_attr_locked(vm_offset_t va, vm_size_t size
X86_PG_PDE_CACHE);
changed = TRUE;
}
- if (tmpva >= VM_MIN_KERNEL_ADDRESS) {
+ if (tmpva >= VM_MIN_KERNEL_ADDRESS &&
+ (*pdpe & PG_PS_FRAME) < dmaplimit) {
if (pa_start == pa_end) {
/* Start physical address run. */
pa_start = *pdpe & PG_PS_FRAME;
@@ -6661,7 +6662,8 @@ pmap_change_attr_locked(vm_offset_t va, vm_size_t size
X86_PG_PDE_CACHE);
changed = TRUE;
}
- if (tmpva >= VM_MIN_KERNEL_ADDRESS) {
+ if (tmpva >= VM_MIN_KERNEL_ADDRESS &&
+ (*pde & PG_PS_FRAME) < dmaplimit) {
if (pa_start == pa_end) {
/* Start physical address run. */
pa_start = *pde & PG_PS_FRAME;
@@ -6688,7 +6690,8 @@ pmap_change_attr_locked(vm_offset_t va, vm_size_t size
X86_PG_PTE_CACHE);
changed = TRUE;
}
- if (tmpva >= VM_MIN_KERNEL_ADDRESS) {
+ if (tmpva >= VM_MIN_KERNEL_ADDRESS &&
+ (*pte & PG_FRAME) < dmaplimit) {
if (pa_start == pa_end) {
/* Start physical address run. */
pa_start = *pte & PG_FRAME;
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