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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/powerpc/include/asm/tlb.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/include/asm/tlb.h')
-rw-r--r--arch/powerpc/include/asm/tlb.h91
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/asm/tlb.h
new file mode 100644
index 0000000000..b3de6102a9
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+++ b/arch/powerpc/include/asm/tlb.h
@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * TLB shootdown specifics for powerpc
+ *
+ * Copyright (C) 2002 Anton Blanchard, IBM Corp.
+ * Copyright (C) 2002 Paul Mackerras, IBM Corp.
+ */
+#ifndef _ASM_POWERPC_TLB_H
+#define _ASM_POWERPC_TLB_H
+#ifdef __KERNEL__
+
+#ifndef __powerpc64__
+#include <linux/pgtable.h>
+#endif
+#ifndef __powerpc64__
+#include <asm/page.h>
+#include <asm/mmu.h>
+#endif
+
+#include <linux/pagemap.h>
+
+#define __tlb_remove_tlb_entry __tlb_remove_tlb_entry
+
+#define tlb_flush tlb_flush
+extern void tlb_flush(struct mmu_gather *tlb);
+/*
+ * book3s:
+ * Hash does not use the linux page-tables, so we can avoid
+ * the TLB invalidate for page-table freeing, Radix otoh does use the
+ * page-tables and needs the TLBI.
+ *
+ * nohash:
+ * We still do TLB invalidate in the __pte_free_tlb routine before we
+ * add the page table pages to mmu gather table batch.
+ */
+#define tlb_needs_table_invalidate() radix_enabled()
+
+/* Get the generic bits... */
+#include <asm-generic/tlb.h>
+
+static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
+ unsigned long address)
+{
+#ifdef CONFIG_PPC_BOOK3S_32
+ if (pte_val(*ptep) & _PAGE_HASHPTE)
+ flush_hash_entry(tlb->mm, ptep, address);
+#endif
+}
+
+#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));
+}
+#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
+
+#define arch_supports_page_table_move arch_supports_page_table_move
+static inline bool arch_supports_page_table_move(void)
+{
+ return radix_enabled();
+}
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_POWERPC_TLB_H */