cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mem-reservation.h (1523B)

      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