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xen-mapcache: don't unmap locked entry during mapcache invalidation

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When an IOREQ_TYPE_INVALIDATE is sent to QEMU, it invalidates all entry
of the map cache even if it's locked.

QEMU is not able to know that entry was invalidated, so when an IO
access is requested a segfault occured.

Signed-off-by: Julien Grall <julien.grall@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Julien Grall 2012-04-13 17:33:02 +00:00 • committed by Stefano Stabellini
parent 09ab48ee6c
commit 852a7cec90
1 changed files with 3 additions and 0 deletions
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3
xen-mapcache.c
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@ -387,6 +387,9 @@ void xen_invalidate_map_cache(void)
if (entry->vaddr_base == NULL) {
continue;
}
if (entry->lock > 0) {
continue;
}
if (munmap(entry->vaddr_base, entry->size) != 0) {
perror("unmap fails");