[PATCH 02/11] xen/xsm: Wrap around xsm_platform_op with CONFIG_PLATFORM_OP

[Jiqian Chen <Jiqian.Chen@xxxxxxx>]

As function xsm_platform_op() is solely invoked in platform_hypercall.c,
it needs to be wrapped around with CONFIG_PLATFORM_OP.

Signed-off-by: Jiqian Chen <Jiqian.Chen@xxxxxxx>
---
cc: "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>
---
 xen/include/xsm/xsm.h | 4 ++++
 xen/xsm/dummy.c       | 3 +++
 xen/xsm/flask/hooks.c | 5 +++++
 3 files changed, 12 insertions(+)

diff --git a/xen/include/xsm/xsm.h b/xen/include/xsm/xsm.h
index 9a23d2827cc0..bc0a0776c895 100644
--- a/xen/include/xsm/xsm.h
+++ b/xen/include/xsm/xsm.h
@@ -678,7 +678,11 @@ static inline int xsm_mem_sharing(xsm_default_t def, 
struct domain *d)
 
 static inline int xsm_platform_op(xsm_default_t def, uint32_t op)
 {
+#ifdef CONFIG_PLATFORM_OP
     return alternative_call(xsm_ops.platform_op, op);
+#else
+    return -EOPNOTSUPP;
+#endif
 }
 
 #ifdef CONFIG_X86
diff --git a/xen/xsm/dummy.c b/xen/xsm/dummy.c
index 8b7e01b50690..d9f4d3ee12b1 100644
--- a/xen/xsm/dummy.c
+++ b/xen/xsm/dummy.c
@@ -129,7 +129,10 @@ static const struct xsm_ops __initconst_cf_clobber 
dummy_ops = {
     .mem_sharing                   = xsm_mem_sharing,
 #endif
 
+#ifdef CONFIG_PLATFORM_OP
     .platform_op                   = xsm_platform_op,
+#endif
+
 #ifdef CONFIG_X86
     .do_mca                        = xsm_do_mca,
     .shadow_control                = xsm_shadow_control,
diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c
index b0308e1b26e0..a56a6d07475c 100644
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -1527,6 +1527,7 @@ static int cf_check flask_deassign_dtdevice(
 }
 #endif /* HAS_PASSTHROUGH && HAS_DEVICE_TREE_DISCOVERY */
 
+#ifdef CONFIG_PLATFORM_OP
 static int cf_check flask_platform_op(uint32_t op)
 {
     switch ( op )
@@ -1598,6 +1599,7 @@ static int cf_check flask_platform_op(uint32_t op)
         return avc_unknown_permission("platform_op", op);
     }
 }
+#endif /* CONFIG_PLATFORM_OP */
 
 #ifdef CONFIG_X86
 static int cf_check flask_do_mca(void)
@@ -2000,7 +2002,10 @@ static const struct xsm_ops __initconst_cf_clobber 
flask_ops = {
     .deassign_dtdevice = flask_deassign_dtdevice,
 #endif
 
+#ifdef CONFIG_PLATFORM_OP
     .platform_op = flask_platform_op,
+#endif
+
 #ifdef CONFIG_X86
     .do_mca = flask_do_mca,
     .shadow_control = flask_shadow_control,
-- 
2.34.1