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1965e933dd
Now after we're sure all pXd_huge() definitions are the same as pXd_leaf(), reuse it. Luckily, pXd_huge() isn't widely used. Link: https://lkml.kernel.org/r/20240318200404.448346-12-peterx@redhat.com Signed-off-by: Peter Xu <peterx@redhat.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: Andreas Larsson <andreas@gaisler.com> Cc: "Aneesh Kumar K.V" <aneesh.kumar@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Bjorn Andersson <andersson@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Fabio Estevam <festevam@denx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Konrad Dybcio <konrad.dybcio@linaro.org> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Mark Salter <msalter@redhat.com> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Muchun Song <muchun.song@linux.dev> Cc: Naoya Horiguchi <nao.horiguchi@gmail.com> Cc: "Naveen N. Rao" <naveen.n.rao@linux.ibm.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
76 lines
1.5 KiB
C
76 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/hugetlb.h>
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#include <linux/pagemap.h>
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#include <linux/err.h>
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#include <linux/sysctl.h>
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#include <asm/mman.h>
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#include <asm/tlb.h>
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#include <asm/tlbflush.h>
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pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
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unsigned long addr, unsigned long sz)
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{
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pgd_t *pgd;
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p4d_t *p4d;
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pud_t *pud;
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pte_t *pte = NULL;
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pgd = pgd_offset(mm, addr);
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p4d = p4d_alloc(mm, pgd, addr);
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pud = pud_alloc(mm, p4d, addr);
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if (pud)
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pte = (pte_t *)pmd_alloc(mm, pud, addr);
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return pte;
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}
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pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr,
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unsigned long sz)
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{
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pgd_t *pgd;
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p4d_t *p4d;
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pud_t *pud;
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pmd_t *pmd = NULL;
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pgd = pgd_offset(mm, addr);
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if (pgd_present(*pgd)) {
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p4d = p4d_offset(pgd, addr);
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if (p4d_present(*p4d)) {
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pud = pud_offset(p4d, addr);
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if (pud_present(*pud))
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pmd = pmd_offset(pud, addr);
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}
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}
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return (pte_t *) pmd;
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}
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int pmd_huge(pmd_t pmd)
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{
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return (pmd_val(pmd) & _PAGE_HUGE) != 0;
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}
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int pud_huge(pud_t pud)
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{
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return (pud_val(pud) & _PAGE_HUGE) != 0;
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}
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uint64_t pmd_to_entrylo(unsigned long pmd_val)
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{
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uint64_t val;
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/* PMD as PTE. Must be huge page */
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if (!pmd_leaf(__pmd(pmd_val)))
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panic("%s", __func__);
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val = pmd_val ^ _PAGE_HUGE;
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val |= ((val & _PAGE_HGLOBAL) >>
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(_PAGE_HGLOBAL_SHIFT - _PAGE_GLOBAL_SHIFT));
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return val;
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}
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