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Add host_memory_backend_pagesize() helper

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There are a couple places (one generic, one target specific) where we need
to get the host page size associated with a particular memory backend.  I
have some upcoming code which will add another place which wants this.  So,
for convenience, add a helper function to calculate this.

host_memory_backend_pagesize() returns the host pagesize for a given
HostMemoryBackend object.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
David Gibson 2018-04-03 15:05:45 +10:00
parent 0de6e2a3ca
commit 2b10808539
4 changed files with 23 additions and 8 deletions
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5
exec.c
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@ -1491,9 +1491,8 @@ static int find_max_supported_pagesize(Object *obj, void *opaque)
long *hpsize_min = opaque;
if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
char *mem_path = object_property_get_str(obj, "mem-path", NULL);
long hpsize = qemu_mempath_getpagesize(mem_path);
g_free(mem_path);
long hpsize = host_memory_backend_pagesize(MEMORY_BACKEND(obj));
if (hpsize < *hpsize_min) {
*hpsize_min = hpsize;
}