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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mm_context.h (1635B)

      1/*
      2 * Copyright (C) 2004 Fujitsu Siemens Computers GmbH
      3 * Licensed under the GPL
      4 *
      5 * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
      6 */
      7
      8#ifndef __ASM_LDT_H
      9#define __ASM_LDT_H
     10
     11#include <linux/mutex.h>
     12#include <asm/ldt.h>
     13
     14extern void ldt_host_info(void);
     15
     16#define LDT_PAGES_MAX \
     17	((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
     18#define LDT_ENTRIES_PER_PAGE \
     19	(PAGE_SIZE/LDT_ENTRY_SIZE)
     20#define LDT_DIRECT_ENTRIES \
     21	((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE)
     22
     23struct ldt_entry {
     24	__u32 a;
     25	__u32 b;
     26};
     27
     28typedef struct uml_ldt {
     29	int entry_count;
     30	struct mutex lock;
     31	union {
     32		struct ldt_entry * pages[LDT_PAGES_MAX];
     33		struct ldt_entry entries[LDT_DIRECT_ENTRIES];
     34	} u;
     35} uml_ldt_t;
     36
     37#define LDT_entry_a(info) \
     38	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
     39
     40#define LDT_entry_b(info) \
     41	(((info)->base_addr & 0xff000000) | \
     42	(((info)->base_addr & 0x00ff0000) >> 16) | \
     43	((info)->limit & 0xf0000) | \
     44	(((info)->read_exec_only ^ 1) << 9) | \
     45	((info)->contents << 10) | \
     46	(((info)->seg_not_present ^ 1) << 15) | \
     47	((info)->seg_32bit << 22) | \
     48	((info)->limit_in_pages << 23) | \
     49	((info)->useable << 20) | \
     50	0x7000)
     51
     52#define _LDT_empty(info) (\
     53	(info)->base_addr	== 0	&& \
     54	(info)->limit		== 0	&& \
     55	(info)->contents	== 0	&& \
     56	(info)->read_exec_only	== 1	&& \
     57	(info)->seg_32bit	== 0	&& \
     58	(info)->limit_in_pages	== 0	&& \
     59	(info)->seg_not_present	== 1	&& \
     60	(info)->useable		== 0	)
     61
     62#ifdef CONFIG_X86_64
     63#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
     64#else
     65#define LDT_empty(info) (_LDT_empty(info))
     66#endif
     67
     68struct uml_arch_mm_context {
     69	uml_ldt_t ldt;
     70};
     71
     72#endif