| hmm.h (704f3f2cf63cdb76925ac2ff432182c73574b20b) | hmm.h (25f23a0c7127b65c4d8200ccda8a352ad5ce1e1d) |
|---|---|
| 1/* 2 * Copyright 2013 Red Hat Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * --- 351 unchanged lines hidden (view full) --- 360 * To snapshot the CPU page table, call hmm_vma_get_pfns(), then take a device 361 * driver lock that serializes device page table updates, then call 362 * hmm_vma_range_done(), to check if the snapshot is still valid. The same 363 * device driver page table update lock must also be used in the 364 * hmm_mirror_ops.sync_cpu_device_pagetables() callback, so that CPU page 365 * table invalidation serializes on it. 366 * 367 * YOU MUST CALL hmm_vma_range_done() ONCE AND ONLY ONCE EACH TIME YOU CALL | 1/* 2 * Copyright 2013 Red Hat Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * --- 351 unchanged lines hidden (view full) --- 360 * To snapshot the CPU page table, call hmm_vma_get_pfns(), then take a device 361 * driver lock that serializes device page table updates, then call 362 * hmm_vma_range_done(), to check if the snapshot is still valid. The same 363 * device driver page table update lock must also be used in the 364 * hmm_mirror_ops.sync_cpu_device_pagetables() callback, so that CPU page 365 * table invalidation serializes on it. 366 * 367 * YOU MUST CALL hmm_vma_range_done() ONCE AND ONLY ONCE EACH TIME YOU CALL |
| 368 * hmm_vma_get_pfns() WITHOUT ERROR ! | 368 * hmm_range_snapshot() WITHOUT ERROR ! |
| 369 * 370 * IF YOU DO NOT FOLLOW THE ABOVE RULE THE SNAPSHOT CONTENT MIGHT BE INVALID ! 371 */ | 369 * 370 * IF YOU DO NOT FOLLOW THE ABOVE RULE THE SNAPSHOT CONTENT MIGHT BE INVALID ! 371 */ |
| 372int hmm_vma_get_pfns(struct hmm_range *range); | 372long hmm_range_snapshot(struct hmm_range *range); |
| 373bool hmm_vma_range_done(struct hmm_range *range); 374 375 376/* 377 * Fault memory on behalf of device driver. Unlike handle_mm_fault(), this will 378 * not migrate any device memory back to system memory. The HMM pfn array will 379 * be updated with the fault result and current snapshot of the CPU page table 380 * for the range. --- 221 unchanged lines hidden --- | 373bool hmm_vma_range_done(struct hmm_range *range); 374 375 376/* 377 * Fault memory on behalf of device driver. Unlike handle_mm_fault(), this will 378 * not migrate any device memory back to system memory. The HMM pfn array will 379 * be updated with the fault result and current snapshot of the CPU page table 380 * for the range. --- 221 unchanged lines hidden --- |