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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Nov 2025 12:42:15.0615 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c617dd2e-b96e-4aa9-f951-08de25d6bcad X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF0002636C.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8645 Content-Type: text/plain; charset="utf-8" From: Ankit Agrawal Take out the implementation to map the VMA to the PTE/PMD/PUD as a separate function. Export the function to be used by nvgrace-gpu module. Signed-off-by: Ankit Agrawal --- drivers/vfio/pci/vfio_pci_core.c | 46 ++++++++++++++++++++------------ include/linux/vfio_pci_core.h | 2 ++ 2 files changed, 31 insertions(+), 17 deletions(-) diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_c= ore.c index 7dcf5439dedc..29dcf78905a6 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -1640,6 +1640,34 @@ static unsigned long vma_to_pfn(struct vm_area_struc= t *vma) return (pci_resource_start(vdev->pdev, index) >> PAGE_SHIFT) + pgoff; } =20 +vm_fault_t vfio_pci_map_pfn(struct vm_fault *vmf, + unsigned long pfn, + unsigned int order) +{ + vm_fault_t ret; + + switch (order) { + case 0: + ret =3D vmf_insert_pfn(vmf->vma, vmf->address, pfn); + break; +#ifdef CONFIG_ARCH_SUPPORTS_PMD_PFNMAP + case PMD_ORDER: + ret =3D vmf_insert_pfn_pmd(vmf, pfn, false); + break; +#endif +#ifdef CONFIG_ARCH_SUPPORTS_PUD_PFNMAP + case PUD_ORDER: + ret =3D vmf_insert_pfn_pud(vmf, pfn, false); + break; +#endif + default: + ret =3D VM_FAULT_FALLBACK; + } + + return ret; +} +EXPORT_SYMBOL_GPL(vfio_pci_map_pfn); + static vm_fault_t vfio_pci_mmap_huge_fault(struct vm_fault *vmf, unsigned int order) { @@ -1662,23 +1690,7 @@ static vm_fault_t vfio_pci_mmap_huge_fault(struct vm= _fault *vmf, if (vdev->pm_runtime_engaged || !__vfio_pci_memory_enabled(vdev)) goto out_unlock; =20 - switch (order) { - case 0: - ret =3D vmf_insert_pfn(vma, vmf->address, pfn); - break; -#ifdef CONFIG_ARCH_SUPPORTS_PMD_PFNMAP - case PMD_ORDER: - ret =3D vmf_insert_pfn_pmd(vmf, pfn, false); - break; -#endif -#ifdef CONFIG_ARCH_SUPPORTS_PUD_PFNMAP - case PUD_ORDER: - ret =3D vmf_insert_pfn_pud(vmf, pfn, false); - break; -#endif - default: - ret =3D VM_FAULT_FALLBACK; - } + ret =3D vfio_pci_map_pfn(vmf, pfn, order); =20 out_unlock: up_read(&vdev->memory_lock); diff --git a/include/linux/vfio_pci_core.h b/include/linux/vfio_pci_core.h index f541044e42a2..058acded858b 100644 --- a/include/linux/vfio_pci_core.h +++ b/include/linux/vfio_pci_core.h @@ -119,6 +119,8 @@ ssize_t vfio_pci_core_read(struct vfio_device *core_vde= v, char __user *buf, size_t count, loff_t *ppos); ssize_t vfio_pci_core_write(struct vfio_device *core_vdev, const char __us= er *buf, size_t count, loff_t *ppos); +vm_fault_t vfio_pci_map_pfn(struct vm_fault *vmf, unsigned long pfn, + unsigned int order); int vfio_pci_core_mmap(struct vfio_device *core_vdev, struct vm_area_struc= t *vma); void vfio_pci_core_request(struct vfio_device *core_vdev, unsigned int cou= nt); int vfio_pci_core_match(struct vfio_device *core_vdev, char *buf); --=20 2.34.1