[xen staging] xen/mm: Introduce mm-types.h

[patchbot@xxxxxxx]

commit 08d03e12d3ab5b00ac3e0e0add695659e1c879b3
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Apr 25 11:20:09 2025 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Fri May 2 00:02:42 2025 +0100

    xen/mm: Introduce mm-types.h
    
    The type used for pagetable attributes/permissions is currently unsigned 
int,
    but needs to become architecture dependent as PPC needs unsigned long.
    
    Introduce mm-types.h to house pte_attr_t.
    
    Given the new toolchain baseline, we can use __has_include() now to remove 
the
    need for boilerplate on most architectures.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/include/xen/mm-types.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/xen/include/xen/mm-types.h b/xen/include/xen/mm-types.h
new file mode 100644
index 0000000000..19f692e9aa
--- /dev/null
+++ b/xen/include/xen/mm-types.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef XEN_MM_TYPES_H
+#define XEN_MM_TYPES_H
+
+/*
+ * Types used to abstract away architecture-specific details in the memory
+ * management code.
+ *
+ * Architectures need only provide their own asm/mm-types.h if they want to
+ * override the defaults given here.
+ */
+#if __has_include(<asm/mm-types.h>)
+# include <asm/mm-types.h>
+#else /* !__has_include(<asm/mm-types.h>) */
+
+typedef unsigned int pte_attr_t;
+
+#endif /* !__has_include(<asm/mm-types.h>) */
+#endif /* XEN_MM_TYPES_H */
--
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