[PATCH v3 03/13] powerpc/mm: implement arch_flush_lazy_mmu_mode()

Kevin Brodsky
2025-10-15T08:27:59Z

Upcoming changes to the lazy_mmu API will cause
arch_flush_lazy_mmu_mode() to be called when leaving a nested
lazy_mmu section.

Move the relevant logic from arch_leave_lazy_mmu_mode() to
arch_flush_lazy_mmu_mode() and have the former call the latter.

Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
---
.../powerpc/include/asm/book3s/64/tlbflush-hash.h | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
index 146287d9580f..7704dbe8e88d 100644
--- a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
@@ -41,6 +41,16 @@ static inline void arch_enter_lazy_mmu_mode(void)
batch->active = 1;
}

+static inline void arch_flush_lazy_mmu_mode(void)
+{
+ struct ppc64_tlb_batch *batch;
+
+ batch = this_cpu_ptr(&ppc64_tlb_batch);
+
+ if (batch->index)
+ __flush_tlb_pending(batch);
+}
+
static inline void arch_leave_lazy_mmu_mode(void)
{
struct ppc64_tlb_batch *batch;
@@ -49,14 +59,11 @@ static inline void arch_leave_lazy_mmu_mode(void)
return;
batch = this_cpu_ptr(&ppc64_tlb_batch);

- if (batch->index)
- __flush_tlb_pending(batch);
+ arch_flush_lazy_mmu_mode();
batch->active = 0;
preempt_enable();
}

-#define arch_flush_lazy_mmu_mode() do {} while (0)
-
extern void hash__tlbiel_all(unsigned int action);

extern void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize,
--
2.47.0