mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

vhost: Allow adjoining regions

Browse Source 
My rework of section adding combines overlapping or adjoining regions,
but checks they're actually the same underlying RAM block.
Fix the case where two blocks adjoin but don't overlap; that new region
should get added (but not combined), but my previous patch was disallowing it.

Fixes: c1ece84e7c

Reported-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Tested-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2018-03-23 15:39:39 +00:00 committed by Michael S. Tsirkin
parent ea3e6f5a93
commit e7b94a84b6
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
hw/virtio/vhost.c
View File

@ -595,6 +595,10 @@ static void vhost_region_add_section(struct vhost_dev *dev,
prev_sec->offset_within_address_space,
prev_sec->offset_within_region);
} else {
/* adjoining regions are fine, but overlapping ones with
* different blocks/offsets shouldn't happen
*/
if (mrs_gpa != prev_gpa_end + 1) {
error_report("%s: Overlapping but not coherent sections "
"at %"PRIx64,
__func__, mrs_gpa);
@ -602,6 +606,7 @@ static void vhost_region_add_section(struct vhost_dev *dev,
}
}
}
}
if (need_add) {
++dev->n_tmp_sections;