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include/xen/mem-reservation.h 1.49 KB
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ae4c51a50   Oleksandr Andrushchenko   xen/balloon: Shar... 
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  /* SPDX-License-Identifier: GPL-2.0 */
  
  /*
   * Xen memory reservation utilities.
   *
   * Copyright (c) 2003, B Dragovic
   * Copyright (c) 2003-2004, M Williamson, K Fraser
   * Copyright (c) 2005 Dan M. Smith, IBM Corporation
   * Copyright (c) 2010 Daniel Kiper
   * Copyright (c) 2018 Oleksandr Andrushchenko, EPAM Systems Inc.
   */
  
  #ifndef _XENMEM_RESERVATION_H
  #define _XENMEM_RESERVATION_H
  
  #include <linux/highmem.h>
  
  #include <xen/page.h>
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  extern bool xen_scrub_pages;
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  static inline void xenmem_reservation_scrub_page(struct page *page)
  {
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  	if (xen_scrub_pages)
  		clear_highpage(page);
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  }
  
  #ifdef CONFIG_XEN_HAVE_PVMMU
  void __xenmem_reservation_va_mapping_update(unsigned long count,
  					    struct page **pages,
  					    xen_pfn_t *frames);
  
  void __xenmem_reservation_va_mapping_reset(unsigned long count,
  					   struct page **pages);
  #endif
  
  static inline void xenmem_reservation_va_mapping_update(unsigned long count,
  							struct page **pages,
  							xen_pfn_t *frames)
  {
  #ifdef CONFIG_XEN_HAVE_PVMMU
  	if (!xen_feature(XENFEAT_auto_translated_physmap))
  		__xenmem_reservation_va_mapping_update(count, pages, frames);
  #endif
  }
  
  static inline void xenmem_reservation_va_mapping_reset(unsigned long count,
  						       struct page **pages)
  {
  #ifdef CONFIG_XEN_HAVE_PVMMU
  	if (!xen_feature(XENFEAT_auto_translated_physmap))
  		__xenmem_reservation_va_mapping_reset(count, pages);
  #endif
  }
  
  int xenmem_reservation_increase(int count, xen_pfn_t *frames);
  
  int xenmem_reservation_decrease(int count, xen_pfn_t *frames);
  
  #endif