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[99.254.121.117]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7a67f3fd6c1sm491055185a.121.2024.08.26.13.44.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Aug 2024 13:44:19 -0700 (PDT) From: Peter Xu To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Gavin Shan , Catalin Marinas , x86@kernel.org, Ingo Molnar , Andrew Morton , Paolo Bonzini , Dave Hansen , Thomas Gleixner , Alistair Popple , kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sean Christopherson , peterx@redhat.com, Oscar Salvador , Jason Gunthorpe , Borislav Petkov , Zi Yan , Axel Rasmussen , David Hildenbrand , Yan Zhao , Will Deacon , Kefeng Wang , Alex Williamson Subject: [PATCH v2 12/19] mm/x86/pat: Use the new follow_pfnmap API Date: Mon, 26 Aug 2024 16:43:46 -0400 Message-ID: <20240826204353.2228736-13-peterx@redhat.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240826204353.2228736-1-peterx@redhat.com> References: <20240826204353.2228736-1-peterx@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Use the new API that can understand huge pfn mappings. Cc: x86@kernel.org Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Signed-off-by: Peter Xu --- arch/x86/mm/pat/memtype.c | 17 +++++++---------- 1 file 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 s= ize) 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 =3D { .vma =3D vma, .address =3D vma->vm_s= tart }; =20 - if (follow_pte(vma, vma->vm_start, &ptep, &ptl)) + if (follow_pfnmap_start(&args)) return -EINVAL; =20 - pte =3D 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; } =20 - *prot =3D pgprot_val(pte_pgprot(pte)); - *phys =3D (resource_size_t)pte_pfn(pte) << PAGE_SHIFT; - pte_unmap_unlock(ptep, ptl); + *prot =3D pgprot_val(args.pgprot); + *phys =3D (resource_size_t)args.pfn << PAGE_SHIFT; + follow_pfnmap_end(&args); return 0; } =20 --=20 2.45.0