84 lines
1.4 KiB
C
84 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <asm/pgalloc.h>
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#include <linux/gfp.h>
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#include <linux/kernel.h>
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#include <linux/pgtable.h>
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#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
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int p4d_set_huge(p4d_t *p4d, phys_addr_t addr, pgprot_t prot)
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{
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return 0;
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}
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void p4d_clear_huge(p4d_t *p4d)
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{
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}
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int pud_set_huge(pud_t *pud, phys_addr_t phys, pgprot_t prot)
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{
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pud_t new_pud = pfn_pud(__phys_to_pfn(phys), prot);
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set_pud(pud, new_pud);
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return 1;
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}
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int pud_clear_huge(pud_t *pud)
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{
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if (!pud_leaf(READ_ONCE(*pud)))
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return 0;
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pud_clear(pud);
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return 1;
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}
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int pud_free_pmd_page(pud_t *pud, unsigned long addr)
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{
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pmd_t *pmd = pud_pgtable(*pud);
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int i;
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pud_clear(pud);
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flush_tlb_kernel_range(addr, addr + PUD_SIZE);
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for (i = 0; i < PTRS_PER_PMD; i++) {
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if (!pmd_none(pmd[i])) {
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pte_t *pte = (pte_t *)pmd_page_vaddr(pmd[i]);
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pte_free_kernel(NULL, pte);
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}
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}
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pmd_free(NULL, pmd);
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return 1;
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}
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int pmd_set_huge(pmd_t *pmd, phys_addr_t phys, pgprot_t prot)
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{
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pmd_t new_pmd = pfn_pmd(__phys_to_pfn(phys), prot);
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set_pmd(pmd, new_pmd);
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return 1;
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}
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int pmd_clear_huge(pmd_t *pmd)
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{
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if (!pmd_leaf(READ_ONCE(*pmd)))
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return 0;
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pmd_clear(pmd);
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return 1;
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}
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int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
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{
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pte_t *pte = (pte_t *)pmd_page_vaddr(*pmd);
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pmd_clear(pmd);
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flush_tlb_kernel_range(addr, addr + PMD_SIZE);
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pte_free_kernel(NULL, pte);
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return 1;
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}
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#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
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