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

Byungchul Park
2024-02-26T03:06:31Z

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(+)

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.
--
2.17.1