1 files changed, 38 insertions, 0 deletions
diff --git a/sys/compat/linux/linux_mmap.c b/sys/compat/linux/linux_mmap.c
index 9fecb6ebb2ad..4fe0df4d5d07 100644
--- a/sys/compat/linux/linux_mmap.c
+++ b/sys/compat/linux/linux_mmap.c
@@ -248,6 +248,44 @@ linux_mprotect_common(struct thread *td, uintptr_t addr, size_t len, int prot)
 }
 
 /*
+ * x86 memory protection keys.  The common entry points perform the
+ * parameter validation Linux applies regardless of hardware support,
+ * then defer to the machine-dependent back end.
+ */
+
+int
+linux_pkey_alloc_common(struct thread *td, uint64_t flags, uint64_t init_val)
+{
+
+	if (flags != 0)
+		return (EINVAL);
+	if ((init_val & ~(uint64_t)LINUX_PKEY_ACCESS_MASK) != 0)
+		return (EINVAL);
+	return (linux_pkey_alloc_machdep(td, init_val));
+}
+
+int
+linux_pkey_free_common(struct thread *td, int pkey)
+{
+
+	if (pkey < 0 || pkey >= LINUX_PKEY_MAX)
+		return (EINVAL);
+	return (linux_pkey_free_machdep(td, pkey));
+}
+
+int
+linux_pkey_mprotect_common(struct thread *td, uintptr_t addr, size_t len,
+    int prot, int pkey)
+{
+
+	if (pkey < -1 || pkey >= LINUX_PKEY_MAX)
+		return (EINVAL);
+	if (pkey == -1)
+		return (linux_mprotect_common(td, addr, len, prot));
+	return (linux_pkey_mprotect_machdep(td, addr, len, prot, pkey));
+}
+
+/*
  * Implement Linux madvise(MADV_DONTNEED), which has unusual semantics: for
  * anonymous memory, pages in the range are immediately discarded.
  */