LXR linux/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
  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