forked from Minki/linux
ae4c51a50c
Memory {increase|decrease}_reservation and VA mappings update/reset
code used in balloon driver can be made common, so other drivers can
also re-use the same functionality without open-coding.
Create a dedicated file for the shared code and export corresponding
symbols for other kernel modules.
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/* 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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static inline void xenmem_reservation_scrub_page(struct page *page)
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{
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#ifdef CONFIG_XEN_SCRUB_PAGES
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clear_highpage(page);
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#endif
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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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