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-rw-r--r--arch/powerpc/include/asm/mman.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mman.h b/arch/powerpc/include/asm/mman.h
new file mode 100644
index 0000000000..17a77d47ed
--- /dev/null
+++ b/arch/powerpc/include/asm/mman.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ */
+#ifndef _ASM_POWERPC_MMAN_H
+#define _ASM_POWERPC_MMAN_H
+
+#include <uapi/asm/mman.h>
+
+#ifdef CONFIG_PPC64
+
+#include <asm/cputable.h>
+#include <linux/mm.h>
+#include <linux/pkeys.h>
+#include <asm/cpu_has_feature.h>
+#include <asm/firmware.h>
+
+static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
+ unsigned long pkey)
+{
+#ifdef CONFIG_PPC_MEM_KEYS
+ return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
+#else
+ return ((prot & PROT_SAO) ? VM_SAO : 0);
+#endif
+}
+#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
+
+static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
+{
+ if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
+ return false;
+ if (prot & PROT_SAO) {
+ if (!cpu_has_feature(CPU_FTR_SAO))
+ return false;
+ if (firmware_has_feature(FW_FEATURE_LPAR) &&
+ !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR))
+ return false;
+ }
+ return true;
+}
+#define arch_validate_prot arch_validate_prot
+
+#endif /* CONFIG_PPC64 */
+#endif /* _ASM_POWERPC_MMAN_H */