[PATCH v3 05/17] arm64: pgtable: use mmu gather to free p4d level page table
STALE633d
From: Qi Zheng <hidden>
Date: 2024-12-23 09:44:07
Also in:
linux-arch, linux-arm-kernel, linux-m68k, linux-mips, linux-mm, linux-riscv, linux-s390, linux-sh, linux-um, lkml, loongarch, sparclinux
Subsystem:
arm64 port (aarch64 architecture), mmu gather and tlb invalidation, the rest · Maintainers:
Catalin Marinas, Will Deacon, "Aneesh Kumar K.V", Andrew Morton, Nick Piggin, Peter Zijlstra, Linus Torvalds
Revision v3 of 5 in this series.
Revisions (5)
Like other levels of page tables, also use mmu gather mechanism to free p4d level page table. Signed-off-by: Qi Zheng <redacted> Originally-by: Peter Zijlstra (Intel) [off-list ref] Cc: linux-arm-kernel@lists.infradead.org --- arch/arm64/include/asm/pgalloc.h | 1 - arch/arm64/include/asm/tlb.h | 14 ++++++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h
index 2965f5a7e39e3..1b4509d3382c6 100644
--- a/arch/arm64/include/asm/pgalloc.h
+++ b/arch/arm64/include/asm/pgalloc.h@@ -85,7 +85,6 @@ static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgdp, p4d_t *p4dp) __pgd_populate(pgdp, __pa(p4dp), pgdval); } -#define __p4d_free_tlb(tlb, p4d, addr) p4d_free((tlb)->mm, p4d) #else static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t p4dp, pgdval_t prot) {
diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h
index a947c6e784ed2..445282cde9afb 100644
--- a/arch/arm64/include/asm/tlb.h
+++ b/arch/arm64/include/asm/tlb.h@@ -111,4 +111,18 @@ static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp, } #endif +#if CONFIG_PGTABLE_LEVELS > 4 +static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4dp, + unsigned long addr) +{ + struct ptdesc *ptdesc = virt_to_ptdesc(p4dp); + + if (!pgtable_l5_enabled()) + return; + + pagetable_p4d_dtor(ptdesc); + tlb_remove_ptdesc(tlb, ptdesc); +} +#endif + #endif
--
2.20.1