Merge tag 'driver-core-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / include / xen / mem-reservation.h
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
20 extern bool xen_scrub_pages;
21
22 static inline void xenmem_reservation_scrub_page(struct page *page)
23 {
24         if (xen_scrub_pages)
25                 clear_highpage(page);
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