Author: alc
Date: Sat Jul 1 16:42:09 2017
New Revision: 320546
URL: https://svnweb.freebsd.org/changeset/base/320546
Log:
When "force" is specified to pmap_invalidate_cache_range(), the given
start address is not required to be page aligned. However, the loop
within pmap_invalidate_cache_range() that performs the actual cache
line invalidations requires that the starting address be truncated to
a multiple of the cache line size. This change corrects an error in
that truncation.
Submitted by: Brett Gutstein <bgutst...@rice.edu>
Reviewed by: kib
MFC after: 1 week
Modified:
head/sys/amd64/amd64/pmap.c
head/sys/i386/i386/pmap.c
Modified: head/sys/amd64/amd64/pmap.c
==============================================================================
--- head/sys/amd64/amd64/pmap.c Sat Jul 1 15:58:57 2017 (r320545)
+++ head/sys/amd64/amd64/pmap.c Sat Jul 1 16:42:09 2017 (r320546)
@@ -1868,7 +1868,7 @@ pmap_invalidate_cache_range(vm_offset_t sva, vm_offset
{
if (force) {
- sva &= ~(vm_offset_t)cpu_clflush_line_size;
+ sva &= ~(vm_offset_t)(cpu_clflush_line_size - 1);
} else {
KASSERT((sva & PAGE_MASK) == 0,
("pmap_invalidate_cache_range: sva not page-aligned"));
Modified: head/sys/i386/i386/pmap.c
==============================================================================
--- head/sys/i386/i386/pmap.c Sat Jul 1 15:58:57 2017 (r320545)
+++ head/sys/i386/i386/pmap.c Sat Jul 1 16:42:09 2017 (r320546)
@@ -1289,7 +1289,7 @@ pmap_invalidate_cache_range(vm_offset_t sva, vm_offset
{
if (force) {
- sva &= ~(vm_offset_t)cpu_clflush_line_size;
+ sva &= ~(vm_offset_t)(cpu_clflush_line_size - 1);
} else {
KASSERT((sva & PAGE_MASK) == 0,
("pmap_invalidate_cache_range: sva not page-aligned"));
_______________________________________________
svn-src-head@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
