45 lines
980 B
C
45 lines
980 B
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* IA-32 Huge TLB Page Support for Kernel.
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*
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* Copyright (C) 2002, Rohit Seth <rohit.seth@intel.com>
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*/
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/sched/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 <linux/compat.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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#include <asm/elf.h>
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#ifdef CONFIG_X86_64
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bool __init arch_hugetlb_valid_size(unsigned long size)
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{
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if (size == PMD_SIZE)
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return true;
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else if (size == PUD_SIZE && boot_cpu_has(X86_FEATURE_GBPAGES))
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return true;
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else
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return false;
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}
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#ifdef CONFIG_CONTIG_ALLOC
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static __init int gigantic_pages_init(void)
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{
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/* With compaction or CMA we can allocate gigantic pages at runtime */
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if (boot_cpu_has(X86_FEATURE_GBPAGES))
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hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
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return 0;
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}
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arch_initcall(gigantic_pages_init);
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#endif
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#endif
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