Merge tag 'mips_kvm_4.11_1' into mips-for-linux-next

MIPS dependencies for KVM

Miscellaneous MIPS architecture changes depended on by the MIPS KVM
changes in the KVM tree.

- Move pgd_alloc() out of header.
- Exports so KVM can access page table management and TLBEX functions.
- Add return errors to protected cache ops.

1 files changed, 25 insertions, 0 deletions

diff --git a/arch/mips/mm/pgtable.c b/arch/mips/mm/pgtable.c
new file mode 100644
index 000000000000..05560b042d82
--- /dev/null
+++ b/arch/mips/mm/pgtable.c
@@ -0,0 +1,25 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/export.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <asm/pgalloc.h>
+
+pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+	pgd_t *ret, *init;
+
+	ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
+	if (ret) {
+		init = pgd_offset(&init_mm, 0UL);
+		pgd_init((unsigned long)ret);
+		memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
+		       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pgd_alloc);