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67 lines
3.3 KiB
C
67 lines
3.3 KiB
C
/*******************************************************************************
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Copyright (c) 2018 NVIDIA Corporation
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to
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deal in the Software without restriction, including without limitation the
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rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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sell copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*******************************************************************************/
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#ifndef __UVM_POPULATE_PAGEABLE_H__
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#define __UVM_POPULATE_PAGEABLE_H__
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// Types of permissions to influence the address range population.
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// PERMISSIONS_INHERIT will use the permissions of the vma.
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// PERMISSIONS_ANY will populate the pages with any permissions allowed by the
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// vma. This behaves the same as PERMISSIONS_INHERIT except that write mappings
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// are not guaranteed if the vma has VM_WRITE.
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// PERMISSIONS_WRITE will populate the pages only if the vma has write access.
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// This guarantees write mappings are populated.
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typedef enum
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{
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UVM_POPULATE_PERMISSIONS_INHERIT,
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UVM_POPULATE_PERMISSIONS_ANY,
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UVM_POPULATE_PERMISSIONS_WRITE,
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} uvm_populate_permissions_t;
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// Populate the pages of the given vma that overlap with the
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// [start:start+length) range. If any of the pages was not populated, we return
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// NV_ERR_NO_MEMORY. See the comment below for details on the touch argument.
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//
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// Locking: vma->vm_mm->mmap_lock must be held in read or write mode
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NV_STATUS uvm_populate_pageable_vma(struct vm_area_struct *vma,
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unsigned long start,
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unsigned long length,
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int min_prot,
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bool touch,
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uvm_populate_permissions_t populate_permissions);
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// Populate all the pages in the given range by calling get_user_pages. The
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// range must be fully backed by vmas. If any of the pages was not populated, we
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// return NV_ERR_NO_MEMORY. The caller can request a touch of the populated
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// pages. This can be useful in virtualization environment. See
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// uvm_ats_service_fault() for example usage.
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//
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// Locking: mm->mmap_lock must be held in read or write mode
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NV_STATUS uvm_populate_pageable(struct mm_struct *mm,
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unsigned long start,
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unsigned long length,
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int min_prot,
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bool touch,
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uvm_populate_permissions_t populate_permissions);
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#endif
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