[PATCH v5 03/12] powerpc/mm: implement arch_flush_lazy_mmu_mode()
From: Kevin Brodsky <hidden>
Date: 2025-11-24 13:22:59
Also in:
linux-arm-kernel, linux-mm, lkml, sparclinux, xen-devel
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
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. The radix_enabled() check is required in both as arch_flush_lazy_mmu_mode() will be called directly from the generic layer in a subsequent patch. Note: the additional this_cpu_ptr() and radix_enabled() calls on the arch_leave_lazy_mmu_mode() path will be removed in a subsequent patch. Acked-by: David Hildenbrand <redacted> Signed-off-by: Kevin Brodsky <redacted> --- .../powerpc/include/asm/book3s/64/tlbflush-hash.h | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 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..2d45f57df169 100644
--- a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h@@ -41,7 +41,7 @@ static inline void arch_enter_lazy_mmu_mode(void) batch->active = 1; } -static inline void arch_leave_lazy_mmu_mode(void) +static inline void arch_flush_lazy_mmu_mode(void) { struct ppc64_tlb_batch *batch;
@@ -51,12 +51,21 @@ static inline void arch_leave_lazy_mmu_mode(void) if (batch->index) __flush_tlb_pending(batch); +} + +static inline void arch_leave_lazy_mmu_mode(void) +{ + struct ppc64_tlb_batch *batch; + + if (radix_enabled()) + return; + batch = this_cpu_ptr(&ppc64_tlb_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,
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2.51.2