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1/* SPDX-License-Identifier: GPL-2.0 */2 3/*4 * Xen memory reservation utilities.5 *6 * Copyright (c) 2003, B Dragovic7 * Copyright (c) 2003-2004, M Williamson, K Fraser8 * Copyright (c) 2005 Dan M. Smith, IBM Corporation9 * Copyright (c) 2010 Daniel Kiper10 * Copyright (c) 2018 Oleksandr Andrushchenko, EPAM Systems Inc.11 */12 13#ifndef _XENMEM_RESERVATION_H14#define _XENMEM_RESERVATION_H15 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_PVMMU29void __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#endif36 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_PVMMU42 if (!xen_feature(XENFEAT_auto_translated_physmap))43 __xenmem_reservation_va_mapping_update(count, pages, frames);44#endif45}46 47static inline void xenmem_reservation_va_mapping_reset(unsigned long count,48 struct page **pages)49{50#ifdef CONFIG_XEN_HAVE_PVMMU51 if (!xen_feature(XENFEAT_auto_translated_physmap))52 __xenmem_reservation_va_mapping_reset(count, pages);53#endif54}55 56int xenmem_reservation_increase(int count, xen_pfn_t *frames);57 58int xenmem_reservation_decrease(int count, xen_pfn_t *frames);59 60#endif61