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mm/x86/pat: use the new follow_pfnmap API

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Use the new API that can understand huge pfn mappings.

Link: https://lkml.kernel.org/r/20240826204353.2228736-13-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Gavin Shan <gshan@redhat.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Niklas Schnelle <schnelle@linux.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Peter Xu 2024-08-26 16:43:46 -04:00 committed by Andrew Morton
parent bd8c2d18bf
commit cbea8536d9
1 changed files with 7 additions and 10 deletions
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17
arch/x86/mm/pat/memtype.c
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@ -951,23 +951,20 @@ static void free_pfn_range(u64 paddr, unsigned long size)
static int follow_phys(struct vm_area_struct *vma, unsigned long *prot,
resource_size_t *phys)
{
pte_t *ptep, pte;
spinlock_t *ptl;
struct follow_pfnmap_args args = { .vma = vma, .address = vma->vm_start };
if (follow_pte(vma, vma->vm_start, &ptep, &ptl))
if (follow_pfnmap_start(&args))
return -EINVAL;
pte = ptep_get(ptep);
/* Never return PFNs of anon folios in COW mappings. */
if (vm_normal_folio(vma, vma->vm_start, pte)) {
pte_unmap_unlock(ptep, ptl);
if (!args.special) {
follow_pfnmap_end(&args);
return -EINVAL;
}
*prot = pgprot_val(pte_pgprot(pte));
*phys = (resource_size_t)pte_pfn(pte) << PAGE_SHIFT;
pte_unmap_unlock(ptep, ptl);
*prot = pgprot_val(args.pgprot);
*phys = (resource_size_t)args.pfn << PAGE_SHIFT;
follow_pfnmap_end(&args);
return 0;
}