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
20extern bool xen_scrub_pages;
21
22static 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
29void __xenmem_reservation_va_mapping_update(unsigned long count,
30 struct page **pages,
31 xen_pfn_t *frames);
32
33void __xenmem_reservation_va_mapping_reset(unsigned long count,
34 struct page **pages);
35#endif
36
37static 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
47static 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
56int xenmem_reservation_increase(int count, xen_pfn_t *frames);
57
58int xenmem_reservation_decrease(int count, xen_pfn_t *frames);
59
60#endif
61