cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

hibernate.c (864B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * hibernate.c:  Hibernaton support specific for sparc64.
      4 *
      5 * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)
      6 */
      7
      8#include <linux/mm.h>
      9
     10#include <asm/hibernate.h>
     11#include <asm/visasm.h>
     12#include <asm/page.h>
     13#include <asm/sections.h>
     14#include <asm/tlb.h>
     15
     16struct saved_context saved_context;
     17
     18/*
     19 *	pfn_is_nosave - check if given pfn is in the 'nosave' section
     20 */
     21
     22int pfn_is_nosave(unsigned long pfn)
     23{
     24	unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin);
     25	unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end);
     26
     27	return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
     28}
     29
     30void save_processor_state(void)
     31{
     32	save_and_clear_fpu();
     33}
     34
     35void restore_processor_state(void)
     36{
     37	struct mm_struct *mm = current->active_mm;
     38
     39	tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context));
     40}