[PATCH v7 3/7] xen/asm-generic: introduce stub header monitor.h

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

The header is shared between several archs so it is
moved to asm-generic.

Switch partly Arm and PPC to asm-generic/monitor.h and only
arch_monitor_get_capabilities() left in arch-specific/monitor.h.

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
Changes in V7:
 - Drop definition of arch_monitor_domctl_event for PPC.
 - define arch_monitor_domctl_event in asm-generic/monitor.h.
 - add "define HAS_ARCH_MONITOR_DOMCTL_EVENT" in arm/.../monitor.h as it has 
arch specific implementation.
---
Changes in V6:
 - Rebase only.
---
Changes in V5:
  - Switched partly Arm and PPC to asm-generic monitor.h only
    arch_monitor_get_capabilities() left in arch-specific/monitor.h.
  - Updated the commit message.
---
Changes in V4:
 - Removed the double blank line.
 - Added Acked-by: Jan Beulich <jbeulich@xxxxxxxx>.
 - Update the commit message
---
Changes in V3:
 - Use forward-declaration of struct domain instead of " #include <xen/sched.h> 
".
 - Add ' include <xen/errno.h> '
 - Drop PPC's monitor.h.
---
Changes in V2:
        - remove inclusion of "+#include <public/domctl.h>"
        - add "struct xen_domctl_monitor_op;"
        - remove one of SPDX tags.
---
 xen/arch/arm/include/asm/monitor.h | 25 +-----------
 xen/arch/ppc/include/asm/monitor.h | 28 +------------
 xen/arch/ppc/stubs.c               |  8 ----
 xen/include/asm-generic/monitor.h  | 64 ++++++++++++++++++++++++++++++
 4 files changed, 67 insertions(+), 58 deletions(-)
 create mode 100644 xen/include/asm-generic/monitor.h

diff --git a/xen/arch/arm/include/asm/monitor.h 
b/xen/arch/arm/include/asm/monitor.h
index 7567be66bd..77a3c1a36c 100644
--- a/xen/arch/arm/include/asm/monitor.h
+++ b/xen/arch/arm/include/asm/monitor.h
@@ -25,34 +25,13 @@
 #include <xen/sched.h>
 #include <public/domctl.h>
 
-static inline
-void arch_monitor_allow_userspace(struct domain *d, bool allow_userspace)
-{
-}
+#define HAS_ARCH_MONITOR_DOMCTL_EVENT
 
-static inline
-int arch_monitor_domctl_op(struct domain *d, struct xen_domctl_monitor_op *mop)
-{
-    /* No arch-specific monitor ops on ARM. */
-    return -EOPNOTSUPP;
-}
+#include <asm-generic/monitor.h>
 
 int arch_monitor_domctl_event(struct domain *d,
                               struct xen_domctl_monitor_op *mop);
 
-static inline
-int arch_monitor_init_domain(struct domain *d)
-{
-    /* No arch-specific domain initialization on ARM. */
-    return 0;
-}
-
-static inline
-void arch_monitor_cleanup_domain(struct domain *d)
-{
-    /* No arch-specific domain cleanup on ARM. */
-}
-
 static inline uint32_t arch_monitor_get_capabilities(struct domain *d)
 {
     uint32_t capabilities = 0;
diff --git a/xen/arch/ppc/include/asm/monitor.h 
b/xen/arch/ppc/include/asm/monitor.h
index e5b0282bf1..89000dacc6 100644
--- a/xen/arch/ppc/include/asm/monitor.h
+++ b/xen/arch/ppc/include/asm/monitor.h
@@ -6,33 +6,7 @@
 #include <public/domctl.h>
 #include <xen/errno.h>
 
-static inline
-void arch_monitor_allow_userspace(struct domain *d, bool allow_userspace)
-{
-}
-
-static inline
-int arch_monitor_domctl_op(struct domain *d, struct xen_domctl_monitor_op *mop)
-{
-    /* No arch-specific monitor ops on PPC. */
-    return -EOPNOTSUPP;
-}
-
-int arch_monitor_domctl_event(struct domain *d,
-                              struct xen_domctl_monitor_op *mop);
-
-static inline
-int arch_monitor_init_domain(struct domain *d)
-{
-    /* No arch-specific domain initialization on PPC. */
-    return 0;
-}
-
-static inline
-void arch_monitor_cleanup_domain(struct domain *d)
-{
-    /* No arch-specific domain cleanup on PPC. */
-}
+#include <asm-generic/monitor.h>
 
 static inline uint32_t arch_monitor_get_capabilities(struct domain *d)
 {
diff --git a/xen/arch/ppc/stubs.c b/xen/arch/ppc/stubs.c
index a96e45626d..da193839bd 100644
--- a/xen/arch/ppc/stubs.c
+++ b/xen/arch/ppc/stubs.c
@@ -95,14 +95,6 @@ void arch_get_domain_info(const struct domain *d,
     BUG_ON("unimplemented");
 }
 
-/* monitor.c */
-
-int arch_monitor_domctl_event(struct domain *d,
-                              struct xen_domctl_monitor_op *mop)
-{
-    BUG_ON("unimplemented");
-}
-
 /* smp.c */
 
 void arch_flush_tlb_mask(const cpumask_t *mask)
diff --git a/xen/include/asm-generic/monitor.h 
b/xen/include/asm-generic/monitor.h
new file mode 100644
index 0000000000..1ade289099
--- /dev/null
+++ b/xen/include/asm-generic/monitor.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * include/asm-generic/monitor.h
+ *
+ * Arch-specific monitor_op domctl handler.
+ *
+ * Copyright (c) 2015 Tamas K Lengyel (tamas@xxxxxxxxxxxxx)
+ * Copyright (c) 2016, Bitdefender S.R.L.
+ *
+ */
+
+#ifndef __ASM_GENERIC_MONITOR_H__
+#define __ASM_GENERIC_MONITOR_H__
+
+#include <xen/errno.h>
+#include <xen/lib.h>
+
+struct domain;
+struct xen_domctl_monitor_op;
+
+static inline
+void arch_monitor_allow_userspace(struct domain *d, bool allow_userspace)
+{
+}
+
+static inline
+int arch_monitor_domctl_op(struct domain *d, struct xen_domctl_monitor_op *mop)
+{
+    /* No arch-specific monitor ops on GENERIC. */
+    return -EOPNOTSUPP;
+}
+
+#ifndef HAS_ARCH_MONITOR_DOMCTL_EVENT
+static inline
+int arch_monitor_domctl_event(struct domain *d,
+                              struct xen_domctl_monitor_op *mop)
+{
+    BUG_ON("unimplemented");
+}
+#endif
+
+static inline
+int arch_monitor_init_domain(struct domain *d)
+{
+    /* No arch-specific domain initialization on GENERIC. */
+    return 0;
+}
+
+static inline
+void arch_monitor_cleanup_domain(struct domain *d)
+{
+    /* No arch-specific domain cleanup on GENERIC. */
+}
+
+#endif /* __ASM_GENERIC_MONITOR_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: BSD
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
-- 
2.43.0