The patch titled
Subject: mm: introduce pte_advance_pfn() and use for pte_next_pfn()
has been added to the -mm mm-unstable branch. Its filename is
mm-introduce-pte_advance_pfn-and-use-for-pte_next_pfn.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-introduce-pte_advance_pfn-and-use-for-pte_next_pfn.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: Ryan Roberts <ryan.roberts@xxxxxxx>
Subject: mm: introduce pte_advance_pfn() and use for pte_next_pfn()
Date: Thu, 15 Feb 2024 10:31:50 +0000
The goal is to be able to advance a PTE by an arbitrary number of PFNs.
So introduce a new API that takes a nr param. Define the default
implementation here and allow for architectures to override.
pte_next_pfn() becomes a wrapper around pte_advance_pfn().
Follow up commits will convert each overriding architecture's
pte_next_pfn() to pte_advance_pfn().
Link: https://lkml.kernel.org/r/20240215103205.2607016-4-ryan.roberts@xxxxxxx
Signed-off-by: Ryan Roberts <ryan.roberts@xxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: Barry Song <21cnbao@xxxxxxxxx>
Cc: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: James Morse <james.morse@xxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: Marc Zyngier <maz@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/pgtable.h | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
--- a/include/linux/pgtable.h~mm-introduce-pte_advance_pfn-and-use-for-pte_next_pfn
+++ a/include/linux/pgtable.h
@@ -212,14 +212,17 @@ static inline int pmd_dirty(pmd_t pmd)
#define arch_flush_lazy_mmu_mode() do {} while (0)
#endif
-
#ifndef pte_next_pfn
-static inline pte_t pte_next_pfn(pte_t pte)
+#ifndef pte_advance_pfn
+static inline pte_t pte_advance_pfn(pte_t pte, unsigned long nr)
{
- return __pte(pte_val(pte) + (1UL << PFN_PTE_SHIFT));
+ return __pte(pte_val(pte) + (nr << PFN_PTE_SHIFT));
}
#endif
+#define pte_next_pfn(pte) pte_advance_pfn(pte, 1)
+#endif
+
#ifndef set_ptes
/**
* set_ptes - Map consecutive pages to a contiguous range of addresses.
_
Patches currently in -mm which might be from ryan.roberts@xxxxxxx are
tools-mm-add-thpmaps-script-to-dump-thp-usage-info.patch
arm64-mm-make-set_ptes-robust-when-oas-cross-48-bit-boundary.patch
mm-clarify-the-spec-for-set_ptes.patch
mm-thp-batch-collapse-pmd-with-set_ptes.patch
mm-introduce-pte_advance_pfn-and-use-for-pte_next_pfn.patch
arm64-mm-convert-pte_next_pfn-to-pte_advance_pfn.patch
x86-mm-convert-pte_next_pfn-to-pte_advance_pfn.patch
mm-tidy-up-pte_next_pfn-definition.patch
arm64-mm-convert-read_onceptep-to-ptep_getptep.patch
arm64-mm-convert-set_pte_at-to-set_ptes-1.patch
arm64-mm-convert-ptep_clear-to-ptep_get_and_clear.patch
arm64-mm-new-ptep-layer-to-manage-contig-bit.patch
arm64-mm-split-__flush_tlb_range-to-elide-trailing-dsb.patch
arm64-mm-wire-up-pte_cont-for-user-mappings.patch
arm64-mm-implement-new-wrprotect_ptes-batch-api.patch
arm64-mm-implement-new-clear_full_ptes-batch-apis.patch
mm-add-pte_batch_hint-to-reduce-scanning-in-folio_pte_batch.patch
arm64-mm-implement-pte_batch_hint.patch
arm64-mm-__always_inline-to-improve-fork-perf.patch
arm64-mm-automatically-fold-contpte-mappings.patch
