xsm: add CAT related policies

Add xsm policies for Cache Allocation Technology(CAT) related hypercalls
to restrict the functions visibility to control domain only.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>

diff --git a/tools/flask/policy/policy/modules/xen/xen.if b/tools/flask/policy/policy/modules/xen/xen.if
index f4cde11ec591495df00ec65d1b3fe4407c18f603..da4c95bcfb0ca1bc98b97c0d4f83fbe2c7585832 100644 (file)
--- a/tools/flask/policy/policy/modules/xen/xen.if
+++ b/tools/flask/policy/policy/modules/xen/xen.if
@@ -52,7 +52,7 @@ define(`create_domain_common', `
                        getaffinity setaffinity setvcpuextstate };
        allow $1 $2:domain2 { set_cpuid settsc setscheduler setclaim
                        set_max_evtchn set_vnumainfo get_vnumainfo cacheflush
-                       psr_cmt_op };
+                       psr_cmt_op psr_cat_op };
        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/tools/flask/policy/policy/modules/xen/xen.te b/tools/flask/policy/policy/modules/xen/xen.te
index 51f59c566c3989ed924418b12a4d92ba6963a432..50aacfe7d75218c6c0bf0b1db02b80e51d49f733 100644 (file)
--- a/tools/flask/policy/policy/modules/xen/xen.te
+++ b/tools/flask/policy/policy/modules/xen/xen.te
@@ -67,6 +67,7 @@ allow dom0_t xen_t:xen {
 allow dom0_t xen_t:xen2 {
     resource_op
     psr_cmt_op
+    psr_cat_op
 };
 allow dom0_t xen_t:mmu memorymap;
 
@@ -80,7 +81,8 @@ allow dom0_t dom0_t:domain {
        getpodtarget setpodtarget set_misc_info set_virq_handler
 };
 allow dom0_t dom0_t:domain2 {
-       set_cpuid gettsc settsc setscheduler set_max_evtchn set_vnumainfo get_vnumainfo psr_cmt_op
+       set_cpuid gettsc settsc setscheduler set_max_evtchn set_vnumainfo
+       get_vnumainfo psr_cmt_op psr_cat_op
 };
 allow dom0_t dom0_t:resource { add remove };
 

diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c
index 6e37d2928d05c4c0ff3e69c1b1ab42b7f7044f20..317f50fc9d95c431452d65b33c769071108fa40f 100644 (file)
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -735,6 +735,9 @@ static int flask_domctl(struct domain *d, int cmd)
     case XEN_DOMCTL_psr_cmt_op:
         return current_has_perm(d, SECCLASS_DOMAIN2, DOMAIN2__PSR_CMT_OP);
 
+    case XEN_DOMCTL_psr_cat_op:
+        return current_has_perm(d, SECCLASS_DOMAIN2, DOMAIN2__PSR_CAT_OP);
+
     default:
         printk("flask_domctl: Unknown op %d\n", cmd);
         return -EPERM;
@@ -794,6 +797,9 @@ static int flask_sysctl(int cmd)
     case XEN_SYSCTL_psr_cmt_op:
         return avc_current_has_perm(SECINITSID_XEN, SECCLASS_XEN2,
                                     XEN2__PSR_CMT_OP, NULL);
+    case XEN_SYSCTL_psr_cat_op:
+        return avc_current_has_perm(SECINITSID_XEN, SECCLASS_XEN2,
+                                    XEN2__PSR_CAT_OP, NULL);
 
     default:
         printk("flask_sysctl: Unknown op %d\n", cmd);

diff --git a/xen/xsm/flask/policy/access_vectors b/xen/xsm/flask/policy/access_vectors
index 68284d5b0df9dbe37ad7f9e5a70bb5c39ba799a8..e1a11b2b6c4b619f67a335dd4a36d8d7a2664450 100644 (file)
--- a/xen/xsm/flask/policy/access_vectors
+++ b/xen/xsm/flask/policy/access_vectors
@@ -85,6 +85,8 @@ class xen2
     resource_op
 # XEN_SYSCTL_psr_cmt_op
     psr_cmt_op
+# XEN_SYSCTL_psr_cat_op
+    psr_cat_op
 }
 
 # Classes domain and domain2 consist of operations that a domain performs on
@@ -230,6 +232,8 @@ class domain2
     mem_paging
 # XENMEM_sharing_op
     mem_sharing
+# XEN_DOMCTL_psr_cat_op
+    psr_cat_op
 }
 
 # Similar to class domain, but primarily contains domctls related to HVM domains