arch/x86: convert platform_hypercall to use XSM

The newly introduced xsm_platform_op hook addresses new sub-ops, while
most ops already have their own XSM hooks.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Acked-by: Jan Beulich <jbeulich@suse.com>
Committed-by: Keir Fraser <keir@xen.org>

2 files changed, 13 insertions, 0 deletions

diff --git a/xen/include/xsm/dummy.h b/xen/include/xsm/dummy.h
index b335bd9565..e42965ce26 100644
--- a/xen/include/xsm/dummy.h
+++ b/xen/include/xsm/dummy.h
@@ -593,6 +593,13 @@ static XSM_INLINE int xsm_platform_quirk(uint32_t quirk)
     return 0;
 }
 
+static XSM_INLINE int xsm_platform_op(uint32_t op)
+{
+    if ( !IS_PRIV(current->domain) )
+        return -EPERM;
+    return 0;
+}
+
 static XSM_INLINE int xsm_firmware_info(void)
 {
     return 0;
diff --git a/xen/include/xsm/xsm.h b/xen/include/xsm/xsm.h
index 75c27bbcb4..470e3c07cd 100644
--- a/xen/include/xsm/xsm.h
+++ b/xen/include/xsm/xsm.h
@@ -159,6 +159,7 @@ struct xsm_operations {
     int (*microcode) (void);
     int (*physinfo) (void);
     int (*platform_quirk) (uint32_t);
+    int (*platform_op) (uint32_t cmd);
     int (*firmware_info) (void);
     int (*efi_call) (void);
     int (*acpi_sleep) (void);
@@ -704,6 +705,11 @@ static inline int xsm_platform_quirk (uint32_t quirk)
     return xsm_ops->platform_quirk(quirk);
 }
 
+static inline int xsm_platform_op (uint32_t op)
+{
+    return xsm_ops->platform_op(op);
+}
+
 static inline int xsm_firmware_info (void)
 {
     return xsm_ops->firmware_info();