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 static inline void xenmem_reservation_scrub_page(struct page *page)
  21 {
  22 #ifdef CONFIG_XEN_SCRUB_PAGES
  23         clear_highpage(page);
  24 #endif
  25 }
  26
  27 #ifdef CONFIG_XEN_HAVE_PVMMU
  28 void __xenmem_reservation_va_mapping_update(unsigned long count,
  29                                             struct page **pages,
  30                                             xen_pfn_t *frames);
  31
  32 void __xenmem_reservation_va_mapping_reset(unsigned long count,
  33                                            struct page **pages);
  34 #endif
  35
  36 static inline void xenmem_reservation_va_mapping_update(unsigned long count,
  37                                                         struct page **pages,
  38                                                         xen_pfn_t *frames)
  39 {
  40 #ifdef CONFIG_XEN_HAVE_PVMMU
  41         if (!xen_feature(XENFEAT_auto_translated_physmap))
  42                 __xenmem_reservation_va_mapping_update(count, pages, frames);
  43 #endif
  44 }
  45
  46 static inline void xenmem_reservation_va_mapping_reset(unsigned long count,
  47                                                        struct page **pages)
  48 {
  49 #ifdef CONFIG_XEN_HAVE_PVMMU
  50         if (!xen_feature(XENFEAT_auto_translated_physmap))
  51                 __xenmem_reservation_va_mapping_reset(count, pages);
  52 #endif
  53 }
  54
  55 int xenmem_reservation_increase(int count, xen_pfn_t *frames);
  56
  57 int xenmem_reservation_decrease(int count, xen_pfn_t *frames);
  58
  59 #endif