xsm: add CMT related xsm policies

Add xsm policies for CMT related hypercalls.

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Release-Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

tools/flask/policy/policy/modules/xen/xen.if

@@ -49,7 +49,7 @@ define(`create_domain_common', `
 			getdomaininfo hypercall setvcpucontext setextvcpucontext
 			getscheduler getvcpuinfo getvcpuextstate getaddrsize
 			getaffinity setaffinity };
-	allow $1 $2:domain2 { set_cpuid settsc setscheduler setclaim set_max_evtchn set_vnumainfo get_vnumainfo };
+	allow $1 $2:domain2 { set_cpuid settsc setscheduler setclaim set_max_evtchn set_vnumainfo get_vnumainfo psr_cmt_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 };

tools/flask/policy/policy/modules/xen/xen.te

@@ -66,6 +66,7 @@ allow dom0_t xen_t:xen {
 };
 allow dom0_t xen_t:xen2 {
     resource_op
+    psr_cmt_op
 };
 allow dom0_t xen_t:mmu memorymap;
 
@@ -79,7 +80,7 @@ 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
+	set_cpuid gettsc settsc setscheduler set_max_evtchn set_vnumainfo get_vnumainfo psr_cmt_op
 };
 allow dom0_t dom0_t:resource { add remove };
 

xen/xsm/flask/hooks.c

@@ -724,6 +724,8 @@ static int flask_domctl(struct domain *d, int cmd)
 
     case XEN_DOMCTL_setvnumainfo:
         return current_has_perm(d, SECCLASS_DOMAIN, DOMAIN2__SET_VNUMAINFO);
+    case XEN_DOMCTL_psr_cmt_op:
+        return current_has_perm(d, SECCLASS_DOMAIN2, DOMAIN2__PSR_CMT_OP);
 
     default:
         printk("flask_domctl: Unknown op %d\n", cmd);
@@ -780,6 +782,10 @@ static int flask_sysctl(int cmd)
     case XEN_SYSCTL_numainfo:
         return domain_has_xen(current->domain, XEN__PHYSINFO);
 
+    case XEN_SYSCTL_psr_cmt_op:
+        return avc_current_has_perm(SECINITSID_XEN, SECCLASS_XEN2,
+                                    XEN2__PSR_CMT_OP, NULL);
+
     default:
         printk("flask_sysctl: Unknown op %d\n", cmd);
         return -EPERM;

xen/xsm/flask/policy/access_vectors

@@ -81,6 +81,8 @@ class xen2
 {
 # XENPF_resource_op
     resource_op
+# XEN_SYSCTL_psr_cmt_op
+    psr_cmt_op
 }
 
 # Classes domain and domain2 consist of operations that a domain performs on
@@ -212,6 +214,8 @@ class domain2
     set_vnumainfo
 # XENMEM_getvnumainfo
     get_vnumainfo
+# XEN_DOMCTL_psr_cmt_op
+    psr_cmt_op
 }
 
 # Similar to class domain, but primarily contains domctls related to HVM domains