On 09.12.2011 14:46, heicars2@xxxxxxxxxxxxxxxxxx wrote:
On Fri, Dec 09, 2011 at 01:49:35PM +0100, Carsten Otte wrote:
This patch introduces an interface to access the guest visible
storage keys. It supports three operations that model the behavior
that SSKE/ISKE/RRBE instructions would have if they were issued by
the guest. These instructions are all documented in the z architecture
principles of operation book.
Signed-off-by: Carsten Otte<cotte@xxxxxxxxxx>
---
[...]
+ spin_lock(¤t->mm->page_table_lock);
+ ptep = ptep_for_addr(addr);
+ if (!ptep)
+ goto out_unlock;
FWIW, this is also a bit odd: if the guest would perform a storage key
operation on such an address it would succeed. If the host will do it,
it will fail (which doesn't match your description above).
No?
Good catch, will fix.
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