[PATCH v7 13/15] x86/altp2m: XSM hooks for altp2m HVM ops

[Ed White <edmund.h.white@intel.com>]

From: Ravi Sahita <ravi.sahita@intel.com>

Signed-off-by: Ravi Sahita <ravi.sahita@intel.com>

Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
---
Changes since v6:
        no changes

 tools/flask/policy/policy/modules/xen/xen.if |  4 ++--
 xen/arch/x86/hvm/hvm.c                       |  6 ++++++
 xen/include/xsm/dummy.h                      | 12 ++++++++++++
 xen/include/xsm/xsm.h                        | 12 ++++++++++++
 xen/xsm/dummy.c                              |  2 ++
 xen/xsm/flask/hooks.c                        | 12 ++++++++++++
 xen/xsm/flask/policy/access_vectors          |  7 +++++++
 7 files changed, 53 insertions(+), 2 deletions(-)

diff --git a/tools/flask/policy/policy/modules/xen/xen.if b/tools/flask/policy/policy/modules/xen/xen.if
index da4c95b..a2f25e1 100644
--- a/tools/flask/policy/policy/modules/xen/xen.if
+++ b/tools/flask/policy/policy/modules/xen/xen.if
@@ -8,7 +8,7 @@
 define(`declare_domain_common', `
 	allow $1 $2:grant { query setup };
 	allow $1 $2:mmu { adjust physmap map_read map_write stat pinpage updatemp mmuext_op };
-	allow $1 $2:hvm { getparam setparam };
+	allow $1 $2:hvm { getparam setparam altp2mhvm_op };
 	allow $1 $2:domain2 get_vnumainfo;
 ')
 
@@ -58,7 +58,7 @@ define(`create_domain_common', `
 	allow $1 $2:mmu { map_read map_write adjust memorymap physmap pinpage mmuext_op updatemp };
 	allow $1 $2:grant setup;
 	allow $1 $2:hvm { cacheattr getparam hvmctl irqlevel pciroute sethvmc
-			setparam pcilevel trackdirtyvram nested };
+			setparam pcilevel trackdirtyvram nested altp2mhvm altp2mhvm_op };
 ')
 
 # create_domain(priv, target)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 55e70f0..cd5d8d5 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -6005,6 +6005,9 @@ static int hvmop_set_param(
                 nestedhvm_vcpu_destroy(v);
         break;
     case HVM_PARAM_ALTP2M:
+        rc = xsm_hvm_param_altp2mhvm(XSM_PRIV, d);
+        if ( rc )
+            break;
         if ( a.value > 1 )
             rc = -EINVAL;
         if ( a.value &&
@@ -6189,6 +6192,9 @@ static int do_altp2m_op(
         goto out;
     }
 
+    if ( (rc = xsm_hvm_altp2mhvm_op(XSM_TARGET, d ? d : current->domain)) )
+        goto out;
+
     switch ( a.cmd )
     {
     case HVMOP_altp2m_get_domain_state:
diff --git a/xen/include/xsm/dummy.h b/xen/include/xsm/dummy.h
index adb02bc..bbbfce7 100644
--- a/xen/include/xsm/dummy.h
+++ b/xen/include/xsm/dummy.h
@@ -548,6 +548,18 @@ static XSM_INLINE int xsm_hvm_param_nested(XSM_DEFAULT_ARG struct domain *d)
     return xsm_default_action(action, current->domain, d);
 }
 
+static XSM_INLINE int xsm_hvm_param_altp2mhvm(XSM_DEFAULT_ARG struct domain *d)
+{
+    XSM_ASSERT_ACTION(XSM_PRIV);
+    return xsm_default_action(action, current->domain, d);
+}
+
+static XSM_INLINE int xsm_hvm_altp2mhvm_op(XSM_DEFAULT_ARG struct domain *d)
+{
+    XSM_ASSERT_ACTION(XSM_TARGET);
+    return xsm_default_action(action, current->domain, d);
+}
+
 static XSM_INLINE int xsm_vm_event_control(XSM_DEFAULT_ARG struct domain *d, int mode, int op)
 {
     XSM_ASSERT_ACTION(XSM_PRIV);
diff --git a/xen/include/xsm/xsm.h b/xen/include/xsm/xsm.h
index 7886574..3678a93 100644
--- a/xen/include/xsm/xsm.h
+++ b/xen/include/xsm/xsm.h
@@ -147,6 +147,8 @@ struct xsm_operations {
     int (*hvm_param) (struct domain *d, unsigned long op);
     int (*hvm_control) (struct domain *d, unsigned long op);
     int (*hvm_param_nested) (struct domain *d);
+    int (*hvm_param_altp2mhvm) (struct domain *d);
+    int (*hvm_altp2mhvm_op) (struct domain *d);
     int (*get_vnumainfo) (struct domain *d);
 
     int (*vm_event_control) (struct domain *d, int mode, int op);
@@ -587,6 +589,16 @@ static inline int xsm_hvm_param_nested (xsm_default_t def, struct domain *d)
     return xsm_ops->hvm_param_nested(d);
 }
 
+static inline int xsm_hvm_param_altp2mhvm (xsm_default_t def, struct domain *d)
+{
+    return xsm_ops->hvm_param_altp2mhvm(d);
+}
+
+static inline int xsm_hvm_altp2mhvm_op (xsm_default_t def, struct domain *d)
+{
+    return xsm_ops->hvm_altp2mhvm_op(d);
+}
+
 static inline int xsm_get_vnumainfo (xsm_default_t def, struct domain *d)
 {
     return xsm_ops->get_vnumainfo(d);
diff --git a/xen/xsm/dummy.c b/xen/xsm/dummy.c
index 06ac911..21b1bf8 100644
--- a/xen/xsm/dummy.c
+++ b/xen/xsm/dummy.c
@@ -116,6 +116,8 @@ void xsm_fixup_ops (struct xsm_operations *ops)
     set_to_dummy_if_null(ops, hvm_param);
     set_to_dummy_if_null(ops, hvm_control);
     set_to_dummy_if_null(ops, hvm_param_nested);
+    set_to_dummy_if_null(ops, hvm_param_altp2mhvm);
+    set_to_dummy_if_null(ops, hvm_altp2mhvm_op);
 
     set_to_dummy_if_null(ops, do_xsm_op);
 #ifdef CONFIG_COMPAT
diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c
index 882681f..7a4522e 100644
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -1176,6 +1176,16 @@ static int flask_hvm_param_nested(struct domain *d)
     return current_has_perm(d, SECCLASS_HVM, HVM__NESTED);
 }
 
+static int flask_hvm_param_altp2mhvm(struct domain *d)
+{
+    return current_has_perm(d, SECCLASS_HVM, HVM__ALTP2MHVM);
+}
+
+static int flask_hvm_altp2mhvm_op(struct domain *d)
+{
+    return current_has_perm(d, SECCLASS_HVM, HVM__ALTP2MHVM_OP);
+}
+
 static int flask_vm_event_control(struct domain *d, int mode, int op)
 {
     return current_has_perm(d, SECCLASS_DOMAIN2, DOMAIN2__VM_EVENT);
@@ -1687,6 +1697,8 @@ static struct xsm_operations flask_ops = {
     .hvm_param = flask_hvm_param,
     .hvm_control = flask_hvm_param,
     .hvm_param_nested = flask_hvm_param_nested,
+    .hvm_param_altp2mhvm = flask_hvm_param_altp2mhvm,
+    .hvm_altp2mhvm_op = flask_hvm_altp2mhvm_op,
 
     .do_xsm_op = do_flask_op,
     .get_vnumainfo = flask_get_vnumainfo,
diff --git a/xen/xsm/flask/policy/access_vectors b/xen/xsm/flask/policy/access_vectors
index b2a20c3..71495fd 100644
--- a/xen/xsm/flask/policy/access_vectors
+++ b/xen/xsm/flask/policy/access_vectors
@@ -282,6 +282,13 @@ class hvm
     share_mem
 # HVMOP_set_param setting HVM_PARAM_NESTEDHVM
     nested
+# HVMOP_set_param setting HVM_PARAM_ALTP2MHVM
+    altp2mhvm
+# HVMOP_altp2m_set_domain_state HVMOP_altp2m_get_domain_state
+# HVMOP_altp2m_vcpu_enable_notify HVMOP_altp2m_create_p2m
+# HVMOP_altp2m_destroy_p2m HVMOP_altp2m_switch_p2m
+# HVMOP_altp2m_set_mem_access HVMOP_altp2m_change_gfn
+    altp2mhvm_op
 }
 
 # Class event describes event channels.  Interdomain event channels have their
-- 
1.9.1