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Diffstat (limited to 'drivers/xen/sys-hypervisor.c')
-rw-r--r--drivers/xen/sys-hypervisor.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/xen/sys-hypervisor.c b/drivers/xen/sys-hypervisor.c
index fdb6d229c9b..5e5ad7e2885 100644
--- a/drivers/xen/sys-hypervisor.c
+++ b/drivers/xen/sys-hypervisor.c
@@ -114,7 +114,7 @@ static void xen_sysfs_version_destroy(void)
/* UUID */
-static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
+static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer)
{
char *vm, *val;
int ret;
@@ -135,6 +135,17 @@ static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
return ret;
}
+static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ xen_domain_handle_t uuid;
+ int ret;
+ ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
+ if (ret)
+ return uuid_show_fallback(attr, buffer);
+ ret = sprintf(buffer, "%pU\n", uuid);
+ return ret;
+}
+
HYPERVISOR_ATTR_RO(uuid);
static int __init xen_sysfs_uuid_init(void)