v4.19.13 snapshot.
diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/asm/tlb.h
new file mode 100644
index 0000000..f0e571b
--- /dev/null
+++ b/arch/powerpc/include/asm/tlb.h
@@ -0,0 +1,113 @@
+/*
+ * TLB shootdown specifics for powerpc
+ *
+ * Copyright (C) 2002 Anton Blanchard, IBM Corp.
+ * Copyright (C) 2002 Paul Mackerras, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#ifndef _ASM_POWERPC_TLB_H
+#define _ASM_POWERPC_TLB_H
+#ifdef __KERNEL__
+
+#ifndef __powerpc64__
+#include <asm/pgtable.h>
+#endif
+#include <asm/pgalloc.h>
+#ifndef __powerpc64__
+#include <asm/page.h>
+#include <asm/mmu.h>
+#endif
+
+#include <linux/pagemap.h>
+
+#define tlb_start_vma(tlb, vma) do { } while (0)
+#define tlb_end_vma(tlb, vma) do { } while (0)
+#define __tlb_remove_tlb_entry __tlb_remove_tlb_entry
+#define tlb_remove_check_page_size_change tlb_remove_check_page_size_change
+
+extern void tlb_flush(struct mmu_gather *tlb);
+
+/* Get the generic bits... */
+#include <asm-generic/tlb.h>
+
+extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
+ unsigned long address);
+
+static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
+ unsigned long address)
+{
+#ifdef CONFIG_PPC_STD_MMU_32
+ if (pte_val(*ptep) & _PAGE_HASHPTE)
+ flush_hash_entry(tlb->mm, ptep, address);
+#endif
+}
+
+static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
+ unsigned int page_size)
+{
+ if (!tlb->page_size)
+ tlb->page_size = page_size;
+ else if (tlb->page_size != page_size) {
+ if (!tlb->fullmm)
+ tlb_flush_mmu(tlb);
+ /*
+ * update the page size after flush for the new
+ * mmu_gather.
+ */
+ tlb->page_size = page_size;
+ }
+}
+
+#ifdef CONFIG_SMP
+static inline int mm_is_core_local(struct mm_struct *mm)
+{
+ return cpumask_subset(mm_cpumask(mm),
+ topology_sibling_cpumask(smp_processor_id()));
+}
+
+#ifdef CONFIG_PPC_BOOK3S_64
+static inline int mm_is_thread_local(struct mm_struct *mm)
+{
+ if (atomic_read(&mm->context.active_cpus) > 1)
+ return false;
+ return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
+}
+static inline void mm_reset_thread_local(struct mm_struct *mm)
+{
+ WARN_ON(atomic_read(&mm->context.copros) > 0);
+ /*
+ * It's possible for mm_access to take a reference on mm_users to
+ * access the remote mm from another thread, but it's not allowed
+ * to set mm_cpumask, so mm_users may be > 1 here.
+ */
+ WARN_ON(current->mm != mm);
+ atomic_set(&mm->context.active_cpus, 1);
+ cpumask_clear(mm_cpumask(mm));
+ cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
+}
+#else /* CONFIG_PPC_BOOK3S_64 */
+static inline int mm_is_thread_local(struct mm_struct *mm)
+{
+ return cpumask_equal(mm_cpumask(mm),
+ cpumask_of(smp_processor_id()));
+}
+#endif /* !CONFIG_PPC_BOOK3S_64 */
+
+#else /* CONFIG_SMP */
+static inline int mm_is_core_local(struct mm_struct *mm)
+{
+ return 1;
+}
+
+static inline int mm_is_thread_local(struct mm_struct *mm)
+{
+ return 1;
+}
+#endif
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_POWERPC_TLB_H */