diff options
| author | Peter Xu <peterx@redhat.com> | 2024-08-26 16:43:46 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-17 01:06:59 -0700 |
| commit | cbea8536d933d546ceb1005bf9c04f9d01da8092 (patch) | |
| tree | 4aa8c01262d7a271fc36993456f74ed6168a00ef | |
| parent | bd8c2d18bf5cccd8842d00b17d6f222beb98b1b3 (diff) | |
mm/x86/pat: use the new follow_pfnmap API
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>
| -rw-r--r-- | arch/x86/mm/pat/memtype.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/arch/x86/mm/pat/memtype.c b/arch/x86/mm/pat/memtype.c index 1fa0bf6ed295..f73b5ce270b3 100644 --- a/arch/x86/mm/pat/memtype.c +++ b/arch/x86/mm/pat/memtype.c @@ -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; } |