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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | ||
3 | /* | |
4 | * Xen memory reservation utilities. | |
5 | * | |
6 | * Copyright (c) 2003, B Dragovic | |
7 | * Copyright (c) 2003-2004, M Williamson, K Fraser | |
8 | * Copyright (c) 2005 Dan M. Smith, IBM Corporation | |
9 | * Copyright (c) 2010 Daniel Kiper | |
10 | * Copyright (c) 2018 Oleksandr Andrushchenko, EPAM Systems Inc. | |
11 | */ | |
12 | ||
13 | #ifndef _XENMEM_RESERVATION_H | |
14 | #define _XENMEM_RESERVATION_H | |
15 | ||
16 | #include <linux/highmem.h> | |
17 | ||
18 | #include <xen/page.h> | |
19 | ||
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20 | extern bool xen_scrub_pages; |
21 | ||
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22 | static inline void xenmem_reservation_scrub_page(struct page *page) |
23 | { | |
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24 | if (xen_scrub_pages) |
25 | clear_highpage(page); | |
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26 | } |
27 | ||
28 | #ifdef CONFIG_XEN_HAVE_PVMMU | |
29 | void __xenmem_reservation_va_mapping_update(unsigned long count, | |
30 | struct page **pages, | |
31 | xen_pfn_t *frames); | |
32 | ||
33 | void __xenmem_reservation_va_mapping_reset(unsigned long count, | |
34 | struct page **pages); | |
35 | #endif | |
36 | ||
37 | static inline void xenmem_reservation_va_mapping_update(unsigned long count, | |
38 | struct page **pages, | |
39 | xen_pfn_t *frames) | |
40 | { | |
41 | #ifdef CONFIG_XEN_HAVE_PVMMU | |
42 | if (!xen_feature(XENFEAT_auto_translated_physmap)) | |
43 | __xenmem_reservation_va_mapping_update(count, pages, frames); | |
44 | #endif | |
45 | } | |
46 | ||
47 | static inline void xenmem_reservation_va_mapping_reset(unsigned long count, | |
48 | struct page **pages) | |
49 | { | |
50 | #ifdef CONFIG_XEN_HAVE_PVMMU | |
51 | if (!xen_feature(XENFEAT_auto_translated_physmap)) | |
52 | __xenmem_reservation_va_mapping_reset(count, pages); | |
53 | #endif | |
54 | } | |
55 | ||
56 | int xenmem_reservation_increase(int count, xen_pfn_t *frames); | |
57 | ||
58 | int xenmem_reservation_decrease(int count, xen_pfn_t *frames); | |
59 | ||
60 | #endif |