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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/include/xen/mem-reservation.h
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/* SPDX-License-Identifier: GPL-2.0 */

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/*

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 * Xen memory reservation utilities.

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 *

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 * Copyright (c) 2003, B Dragovic

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 * Copyright (c) 2003-2004, M Williamson, K Fraser

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 * Copyright (c) 2005 Dan M. Smith, IBM Corporation

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 * Copyright (c) 2010 Daniel Kiper

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 * Copyright (c) 2018 Oleksandr Andrushchenko, EPAM Systems Inc.

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 */

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#ifndef _XENMEM_RESERVATION_H

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#define _XENMEM_RESERVATION_H

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#include <linux/highmem.h>

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#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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{

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	if (xen_scrub_pages)

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		clear_highpage(page);

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}

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#ifdef CONFIG_XEN_HAVE_PVMMU

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void __xenmem_reservation_va_mapping_update(unsigned long count,

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					    struct page **pages,

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					    xen_pfn_t *frames);

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void __xenmem_reservation_va_mapping_reset(unsigned long count,

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					   struct page **pages);

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#endif

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static inline void xenmem_reservation_va_mapping_update(unsigned long count,

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							struct page **pages,

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							xen_pfn_t *frames)

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{

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#ifdef CONFIG_XEN_HAVE_PVMMU

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	if (!xen_feature(XENFEAT_auto_translated_physmap))

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		__xenmem_reservation_va_mapping_update(count, pages, frames);

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#endif

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}

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static inline void xenmem_reservation_va_mapping_reset(unsigned long count,

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						       struct page **pages)

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{

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#ifdef CONFIG_XEN_HAVE_PVMMU

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	if (!xen_feature(XENFEAT_auto_translated_physmap))

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		__xenmem_reservation_va_mapping_reset(count, pages);

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#endif

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}

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int xenmem_reservation_increase(int count, xen_pfn_t *frames);

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int xenmem_reservation_decrease(int count, xen_pfn_t *frames);

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#endif

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