x86/mm: Rework stale p2m auditing

The p2m audit code doesn't even compile, let alone work. It also
partially supports ept. Make it:

- compile
- lay groundwork for eventual ept support
- move out of the way of all calls and turn it into a domctl. It's
  obviously not being used by anybody presently.
- enable it via said domctl

Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Signed-off-by: Tim Deegan <tim@xen.org>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Tim Deegan <tim@xen.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h
index ea8fce63d9..b265a47aec 100644
--- a/xen/include/public/domctl.h
+++ b/xen/include/public/domctl.h
@@ -800,6 +800,16 @@ struct xen_domctl_mem_sharing_op {
 typedef struct xen_domctl_mem_sharing_op xen_domctl_mem_sharing_op_t;
 DEFINE_XEN_GUEST_HANDLE(xen_domctl_mem_sharing_op_t);
 
+struct xen_domctl_audit_p2m {
+    /* OUT error counts */
+    uint64_t orphans_debug;
+    uint64_t orphans_invalid;
+    uint64_t m2p_bad;
+    uint64_t p2m_bad;
+};
+typedef struct xen_domctl_audit_p2m xen_domctl_audit_p2m_t;
+DEFINE_XEN_GUEST_HANDLE(xen_domctl_audit_p2m_t);
+
 #if defined(__i386__) || defined(__x86_64__)
 /* XEN_DOMCTL_setvcpuextstate */
 /* XEN_DOMCTL_getvcpuextstate */
@@ -898,6 +908,7 @@ struct xen_domctl {
 #define XEN_DOMCTL_setvcpuextstate               62
 #define XEN_DOMCTL_getvcpuextstate               63
 #define XEN_DOMCTL_set_access_required           64
+#define XEN_DOMCTL_audit_p2m                     65
 #define XEN_DOMCTL_gdbsx_guestmemio            1000
 #define XEN_DOMCTL_gdbsx_pausevcpu             1001
 #define XEN_DOMCTL_gdbsx_unpausevcpu           1002
@@ -951,6 +962,7 @@ struct xen_domctl {
         struct xen_domctl_vcpuextstate      vcpuextstate;
 #endif
         struct xen_domctl_set_access_required access_required;
+        struct xen_domctl_audit_p2m         audit_p2m;
         struct xen_domctl_gdbsx_memio       gdbsx_guest_memio;
         struct xen_domctl_gdbsx_pauseunp_vcpu gdbsx_pauseunp_vcpu;
         struct xen_domctl_gdbsx_domstatus   gdbsx_domstatus;