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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suspend.c (619B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Suspend support specific for power.
      4 *
      5 * Copyright (c) 2002 Pavel Machek <pavel@ucw.cz>
      6 * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org>
      7 */
      8
      9#include <linux/mm.h>
     10#include <linux/suspend.h>
     11#include <asm/page.h>
     12#include <asm/sections.h>
     13
     14/*
     15 *	pfn_is_nosave - check if given pfn is in the 'nosave' section
     16 */
     17
     18int pfn_is_nosave(unsigned long pfn)
     19{
     20	unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT;
     21	unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT;
     22	return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
     23}