Am Dienstag, 09 August 2016, 09:01:13 schrieb Mimi Zohar:

On Tue, 2016-08-09 at 20:59 +1000, Michael Ellerman wrote:

quoted

Mimi Zohar [off-list ref] writes:

quoted

diff --git a/security/integrity/ima/ima.h

b/security/integrity/ima/ima.h
index b5728da..84e8d36 100644

--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h

@@ -102,6 +102,13 @@ struct ima_queue_entry {

 };
 extern struct list_head ima_measurements;	/* list of all 

measurements

quoted

quoted

 */

+/* Some details preceding the binary serialized measurement list */
+struct ima_kexec_hdr {
+	unsigned short version;
+	unsigned long buffer_size;
+	unsigned long count;
+} __packed;
+

Am I understanding it correctly that this structure is passed between
kernels?

Yes, the header prefixes the measurement list, which is being passed on
the same computer to the next kernel.  Could the architecture (eg.
LE/BE) change between soft re-boots?

Yes. I am able to boot a BE kernel from an LE kernel with my patches. 
Whether we want to support that or not is another question...
-- 
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center