[PATCH v4 01/14] xen/asm-generic: introduce stub header paging.h

[Oleksii Kurochko <oleksii.kurochko@gmail.com>]

The patch introduces generic paging.h header for Arm, PPC and
RISC-V.

All mentioned above architectures use hardware virt extensions
and hardware pagetable extensions thereby it makes sense to set
paging_mode_translate and paging_mode_external by default.

Also in this patch Arm and PPC architectures are switched to
generic paging.h header.

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
---
Changes in V4:
 - Added Acked-by: Julien Grall <jgrall@amazon.com>.
---
Changes in V3:
 - Sort xen/arch/{arm,ppc}/include/asm/Makefile alphabetically.
 - Add Reviewed-by: Jan Beulich <jbeulich@suse.com>
---
Changes in V2:
	- evaluate argument of macros
	- covert macros to true
	- use proper tabs
	- switch Arm & PPC to generic paging.h
	- update commit message
---
 xen/arch/arm/include/asm/Makefile |  1 +
 xen/arch/arm/include/asm/paging.h | 16 ----------------
 xen/arch/ppc/include/asm/Makefile |  1 +
 xen/arch/ppc/include/asm/paging.h |  7 -------
 xen/include/asm-generic/paging.h  | 19 +++++++++++++++++++
 5 files changed, 21 insertions(+), 23 deletions(-)
 delete mode 100644 xen/arch/arm/include/asm/paging.h
 delete mode 100644 xen/arch/ppc/include/asm/paging.h
 create mode 100644 xen/include/asm-generic/paging.h

diff --git a/xen/arch/arm/include/asm/Makefile b/xen/arch/arm/include/asm/Makefile
index 821addb0bf..ece7fa66dd 100644
--- a/xen/arch/arm/include/asm/Makefile
+++ b/xen/arch/arm/include/asm/Makefile
@@ -1,2 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0-only
+generic-y += paging.h
 generic-y += vm_event.h
diff --git a/xen/arch/arm/include/asm/paging.h b/xen/arch/arm/include/asm/paging.h
deleted file mode 100644
index 6d1a000246..0000000000
--- a/xen/arch/arm/include/asm/paging.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef _XEN_PAGING_H
-#define _XEN_PAGING_H
-
-#define paging_mode_translate(d)              (1)
-#define paging_mode_external(d)               (1)
-
-#endif /* XEN_PAGING_H */
-
-/*
- * Local variables:
- * mode: C
- * c-file-style: "BSD"
- * c-basic-offset: 4
- * indent-tabs-mode: nil
- * End:
- */
diff --git a/xen/arch/ppc/include/asm/Makefile b/xen/arch/ppc/include/asm/Makefile
index 821addb0bf..ece7fa66dd 100644
--- a/xen/arch/ppc/include/asm/Makefile
+++ b/xen/arch/ppc/include/asm/Makefile
@@ -1,2 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0-only
+generic-y += paging.h
 generic-y += vm_event.h
diff --git a/xen/arch/ppc/include/asm/paging.h b/xen/arch/ppc/include/asm/paging.h
deleted file mode 100644
index eccacece29..0000000000
--- a/xen/arch/ppc/include/asm/paging.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef __ASM_PPC_PAGING_H__
-#define __ASM_PPC_PAGING_H__
-
-#define paging_mode_translate(d)              (1)
-#define paging_mode_external(d)               (1)
-
-#endif /* __ASM_PPC_PAGING_H__ */
diff --git a/xen/include/asm-generic/paging.h b/xen/include/asm-generic/paging.h
new file mode 100644
index 0000000000..8df534cfdc
--- /dev/null
+++ b/xen/include/asm-generic/paging.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_GENERIC_PAGING_H__
+#define __ASM_GENERIC_PAGING_H__
+
+#include <xen/stdbool.h>
+
+#define paging_mode_translate(d)    ((void)(d), true)
+#define paging_mode_external(d)     ((void)(d), true)
+
+#endif /* __ASM_GENERIC_PAGING_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
-- 
2.43.0