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arm64: pgtable: use mmu gather to free p4d level page table

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Like other levels of page tables, also use mmu gather mechanism to free
p4d level page table.

Link: https://lkml.kernel.org/r/3fd48525397b34a64f7c0eb76746da30814dc941.1736317725.git.zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Originally-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Alexandre Ghiti <alexghiti@rivosinc.com>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jann Horn <jannh@google.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Qi Zheng
2025-01-08 14:57:21 +08:00
committed by Andrew Morton
parent 5fcf5fa612
commit 440af48d68
2 changed files with 14 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm64/include/asm/pgalloc.h
View File

@@ -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)
{

14
arch/arm64/include/asm/tlb.h
View File

@@ -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