The patch titled
Subject: mm/powerpc: add missing pud helpers
has been added to the -mm mm-unstable branch. Its filename is
mm-powerpc-add-missing-pud-helpers.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-powerpc-add-missing-pud-helpers.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Peter Xu <peterx@xxxxxxxxxx>
Subject: mm/powerpc: add missing pud helpers
Date: Wed, 7 Aug 2024 15:48:07 -0400
These new helpers will be needed for pud entry updates soon. Introduce
them by referencing the pmd ones. Namely:
- pudp_invalidate()
- pud_modify()
Link: https://lkml.kernel.org/r/20240807194812.819412-4-peterx@xxxxxxxxxx
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: "Edgecombe, Rick P" <rick.p.edgecombe@xxxxxxxxx>
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: James Houghton <jthoughton@xxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxxx>
Cc: Sean Christopherson <seanjc@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/asm/book3s/64/pgtable.h | 3 ++
arch/powerpc/mm/book3s64/pgtable.c | 20 +++++++++++++++++
2 files changed, 23 insertions(+)
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h~mm-powerpc-add-missing-pud-helpers
+++ a/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1124,6 +1124,7 @@ extern pmd_t pfn_pmd(unsigned long pfn,
extern pud_t pfn_pud(unsigned long pfn, pgprot_t pgprot);
extern pmd_t mk_pmd(struct page *page, pgprot_t pgprot);
extern pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot);
+extern pud_t pud_modify(pud_t pud, pgprot_t newprot);
extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t pmd);
extern void set_pud_at(struct mm_struct *mm, unsigned long addr,
@@ -1384,6 +1385,8 @@ static inline pgtable_t pgtable_trans_hu
#define __HAVE_ARCH_PMDP_INVALIDATE
extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp);
+extern pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
+ pud_t *pudp);
#define pmd_move_must_withdraw pmd_move_must_withdraw
struct spinlock;
--- a/arch/powerpc/mm/book3s64/pgtable.c~mm-powerpc-add-missing-pud-helpers
+++ a/arch/powerpc/mm/book3s64/pgtable.c
@@ -176,6 +176,17 @@ pmd_t pmdp_invalidate(struct vm_area_str
return __pmd(old_pmd);
}
+pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
+ pud_t *pudp)
+{
+ unsigned long old_pud;
+
+ VM_WARN_ON_ONCE(!pud_present(*pudp));
+ old_pud = pud_hugepage_update(vma->vm_mm, address, pudp, _PAGE_PRESENT, _PAGE_INVALID);
+ flush_pud_tlb_range(vma, address, address + HPAGE_PUD_SIZE);
+ return __pud(old_pud);
+}
+
pmd_t pmdp_huge_get_and_clear_full(struct vm_area_struct *vma,
unsigned long addr, pmd_t *pmdp, int full)
{
@@ -259,6 +270,15 @@ pmd_t pmd_modify(pmd_t pmd, pgprot_t new
pmdv &= _HPAGE_CHG_MASK;
return pmd_set_protbits(__pmd(pmdv), newprot);
}
+
+pud_t pud_modify(pud_t pud, pgprot_t newprot)
+{
+ unsigned long pudv;
+
+ pudv = pud_val(pud);
+ pudv &= _HPAGE_CHG_MASK;
+ return pud_set_protbits(__pud(pudv), newprot);
+}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
/* For use by kexec, called with MMU off */
_
Patches currently in -mm which might be from peterx@xxxxxxxxxx are
mm-dax-dump-start-address-in-fault-handler.patch
mm-mprotect-push-mmu-notifier-to-puds.patch
mm-powerpc-add-missing-pud-helpers.patch
mm-x86-make-pud_leaf-only-care-about-pse-bit.patch
mm-x86-arch_check_zapped_pud.patch
mm-x86-add-missing-pud-helpers.patch
mm-mprotect-fix-dax-pud-handlings.patch
