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[v8,2/8] arm64: tlbflush: Add APIs manipulating tlb batch's arch data

Message ID 20240219060407.25254-3-byungchul@sk.com (mailing list archive)
State New
Headers show
Series Reduce TLB flushes by 94% by improving folio migration | expand

Commit Message

Byungchul Park Feb. 19, 2024, 6:04 a.m. UTC 
This is a preparation for migrc mechanism that requires to manipulate
tlb batch's arch data. Even though arm64 does nothing with it, arch
with CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH should provide the APIs.

Signed-off-by: Byungchul Park <byungchul@sk.com>
---
 arch/arm64/include/asm/tlbflush.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
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Patch

diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h
index bb2c2833a987..4f2094843e7a 100644
--- a/arch/arm64/include/asm/tlbflush.h
+++ b/arch/arm64/include/asm/tlbflush.h
@@ -328,6 +328,25 @@  static inline void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch)
 	dsb(ish);
 }
 
+static inline void arch_tlbbatch_clear(struct arch_tlbflush_unmap_batch *batch)
+{
+	/* nothing to do */
+}
+
+static inline void arch_tlbbatch_fold(struct arch_tlbflush_unmap_batch *bdst,
+			       struct arch_tlbflush_unmap_batch *bsrc)
+{
+	/* nothing to do */
+}
+
+static inline bool arch_tlbbatch_done(struct arch_tlbflush_unmap_batch *bdst,
+			       struct arch_tlbflush_unmap_batch *bsrc)
+{
+	/* nothing to do */
+
+	return false;
+}
+
 /*
  * This is meant to avoid soft lock-ups on large TLB flushing ranges and not
  * necessarily a performance improvement.