[for-4.20][PATCH 3/3] xen/flask: Wire up XEN_DOMCTL_set_llc_colors

[Michal Orzel]

Addition of FLASK permission for this hypercall was overlooked in the
original patch. Fix it. Setting LLC colors is only possible during domain
creation.

Fixes: 6985aa5e0c3c ("xen: extend domctl interface for cache coloring")
Signed-off-by: Michal Orzel <michal.or...@amd.com>
---
 tools/flask/policy/modules/xen.if   | 2 +-
 xen/xsm/flask/hooks.c               | 3 +++
 xen/xsm/flask/policy/access_vectors | 2 ++
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/flask/policy/modules/xen.if 
b/tools/flask/policy/modules/xen.if
index def60da88301..f7cf7c43c80b 100644
--- a/tools/flask/policy/modules/xen.if
+++ b/tools/flask/policy/modules/xen.if
@@ -54,7 +54,7 @@ define(`create_domain_common', `
        allow $1 $2:domain2 { set_cpu_policy settsc setscheduler setclaim
                        set_vnumainfo get_vnumainfo cacheflush
                        psr_cmt_op psr_alloc soft_reset
-                       resource_map get_cpu_policy vuart_op };
+                       resource_map get_cpu_policy vuart_op set_llc_colors };
        allow $1 $2:security check_context;
        allow $1 $2:shadow enable;
        allow $1 $2:mmu { map_read map_write adjust memorymap physmap pinpage 
mmuext_op updatemp };
diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c
index e263e745d441..14d84df9cad6 100644
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -847,6 +847,9 @@ static int cf_check flask_domctl(struct domain *d, unsigned 
int cmd,
     case XEN_DOMCTL_dt_overlay:
         return current_has_perm(d, SECCLASS_DOMAIN2, DOMAIN2__DT_OVERLAY);
 
+    case XEN_DOMCTL_set_llc_colors:
+        return current_has_perm(d, SECCLASS_DOMAIN2, DOMAIN2__SET_LLC_COLORS);
+
     default:
         return avc_unknown_permission("domctl", cmd);
     }
diff --git a/xen/xsm/flask/policy/access_vectors 
b/xen/xsm/flask/policy/access_vectors
index 78fe37583b18..320d77706dee 100644
--- a/xen/xsm/flask/policy/access_vectors
+++ b/xen/xsm/flask/policy/access_vectors
@@ -255,6 +255,8 @@ class domain2
     vuart_op
 # XEN_DOMCTL_dt_overlay
     dt_overlay
+# XEN_DOMCTL_set_llc_colors
+    set_llc_colors
 }
 
 # Similar to class domain, but primarily contains domctls related to HVM 
domains
-- 
2.25.1