Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
x86: implement gbpages support in change_page_attr()
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
authored by
Andi Kleen
and committed by
Ingo Molnar
f07333fd
b5360222
+15
-2
arch/x86/mm/pageattr.c
+15
-2
arch/x86/mm/pageattr.c
···
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psize = PMD_PAGE_SIZE;
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pmask = PMD_PAGE_MASK;
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break;
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case PG_LEVEL_1G:
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default:
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res = -EINVAL;
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goto out_unlock;
···
348
{
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pgprot_t ref_prot;
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gfp_t gfp_flags = GFP_KERNEL;
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-
unsigned long flags, addr, pfn;
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pte_t *pbase, *tmp;
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struct page *base;
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unsigned int i, level;
···
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#endif
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ref_prot = pte_pgprot(pte_clrhuge(*kpte));
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/*
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* Get the target pfn from the original entry:
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*/
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pfn = pte_pfn(*kpte);
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-
for (i = 0; i < PTRS_PER_PTE; i++, pfn++)
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set_pte(&pbase[i], pfn_pte(pfn, ref_prot));
386
387
/*
···
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psize = PMD_PAGE_SIZE;
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pmask = PMD_PAGE_MASK;
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break;
284
+
#ifdef CONFIG_X86_64
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case PG_LEVEL_1G:
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+
psize = PMD_PAGE_SIZE;
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+
pmask = PMD_PAGE_MASK;
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+
break;
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+
#endif
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default:
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res = -EINVAL;
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goto out_unlock;
···
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{
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pgprot_t ref_prot;
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gfp_t gfp_flags = GFP_KERNEL;
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+
unsigned long flags, addr, pfn, pfninc = 1;
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pte_t *pbase, *tmp;
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struct page *base;
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unsigned int i, level;
···
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#endif
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ref_prot = pte_pgprot(pte_clrhuge(*kpte));
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+
#ifdef CONFIG_X86_64
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+
if (level == PG_LEVEL_1G) {
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+
pfninc = PMD_PAGE_SIZE >> PAGE_SHIFT;
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+
pgprot_val(ref_prot) |= _PAGE_PSE;
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+
addr &= PUD_PAGE_MASK;
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+
}
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+
#endif
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+
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/*
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* Get the target pfn from the original entry:
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*/
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pfn = pte_pfn(*kpte);
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+
for (i = 0; i < PTRS_PER_PTE; i++, pfn += pfninc)
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set_pte(&pbase[i], pfn_pte(pfn, ref_prot));
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/*