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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setup.h (3627B)


      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _ASM_X86_SETUP_H
      3#define _ASM_X86_SETUP_H
      4
      5#include <uapi/asm/setup.h>
      6
      7#define COMMAND_LINE_SIZE 2048
      8
      9#include <linux/linkage.h>
     10#include <asm/page_types.h>
     11#include <asm/ibt.h>
     12
     13#ifdef __i386__
     14
     15#include <linux/pfn.h>
     16/*
     17 * Reserved space for vmalloc and iomap - defined in asm/page.h
     18 */
     19#define MAXMEM_PFN	PFN_DOWN(MAXMEM)
     20#define MAX_NONPAE_PFN	(1 << 20)
     21
     22#endif /* __i386__ */
     23
     24#define PARAM_SIZE 4096		/* sizeof(struct boot_params) */
     25
     26#define OLD_CL_MAGIC		0xA33F
     27#define OLD_CL_ADDRESS		0x020	/* Relative to real mode data */
     28#define NEW_CL_POINTER		0x228	/* Relative to real mode data */
     29
     30#ifndef __ASSEMBLY__
     31#include <asm/bootparam.h>
     32#include <asm/x86_init.h>
     33
     34extern u64 relocated_ramdisk;
     35
     36/* Interrupt control for vSMPowered x86_64 systems */
     37#ifdef CONFIG_X86_64
     38void vsmp_init(void);
     39#else
     40static inline void vsmp_init(void) { }
     41#endif
     42
     43struct pt_regs;
     44
     45void setup_bios_corruption_check(void);
     46void early_platform_quirks(void);
     47
     48extern unsigned long saved_video_mode;
     49
     50extern void reserve_standard_io_resources(void);
     51extern void i386_reserve_resources(void);
     52extern unsigned long __startup_64(unsigned long physaddr, struct boot_params *bp);
     53extern void startup_64_setup_env(unsigned long physbase);
     54extern void early_setup_idt(void);
     55extern void __init do_early_exception(struct pt_regs *regs, int trapnr);
     56
     57#ifdef CONFIG_X86_INTEL_MID
     58extern void x86_intel_mid_early_setup(void);
     59#else
     60static inline void x86_intel_mid_early_setup(void) { }
     61#endif
     62
     63#ifdef CONFIG_X86_INTEL_CE
     64extern void x86_ce4100_early_setup(void);
     65#else
     66static inline void x86_ce4100_early_setup(void) { }
     67#endif
     68
     69#ifndef _SETUP
     70
     71#include <asm/espfix.h>
     72#include <linux/kernel.h>
     73
     74/*
     75 * This is set up by the setup-routine at boot-time
     76 */
     77extern struct boot_params boot_params;
     78extern char _text[];
     79
     80static inline bool kaslr_enabled(void)
     81{
     82	return IS_ENABLED(CONFIG_RANDOMIZE_MEMORY) &&
     83		!!(boot_params.hdr.loadflags & KASLR_FLAG);
     84}
     85
     86/*
     87 * Apply no randomization if KASLR was disabled at boot or if KASAN
     88 * is enabled. KASAN shadow mappings rely on regions being PGD aligned.
     89 */
     90static inline bool kaslr_memory_enabled(void)
     91{
     92	return kaslr_enabled() && !IS_ENABLED(CONFIG_KASAN);
     93}
     94
     95static inline unsigned long kaslr_offset(void)
     96{
     97	return (unsigned long)&_text - __START_KERNEL;
     98}
     99
    100/*
    101 * Do NOT EVER look at the BIOS memory size location.
    102 * It does not work on many machines.
    103 */
    104#define LOWMEMSIZE()	(0x9f000)
    105
    106/* exceedingly early brk-like allocator */
    107extern unsigned long _brk_end;
    108void *extend_brk(size_t size, size_t align);
    109
    110/*
    111 * Reserve space in the .brk section, which is a block of memory from which the
    112 * caller is allowed to allocate very early (before even memblock is available)
    113 * by calling extend_brk().  All allocated memory will be eventually converted
    114 * to memblock.  Any leftover unallocated memory will be freed.
    115 *
    116 * The size is in bytes.
    117 */
    118#define RESERVE_BRK(name, size)					\
    119	__section(".bss..brk") __aligned(1) __used	\
    120	static char __brk_##name[size]
    121
    122extern void probe_roms(void);
    123
    124void clear_bss(void);
    125
    126#ifdef __i386__
    127
    128asmlinkage void __init i386_start_kernel(void);
    129
    130#else
    131asmlinkage void __init x86_64_start_kernel(char *real_mode);
    132asmlinkage void __init x86_64_start_reservations(char *real_mode_data);
    133
    134#endif /* __i386__ */
    135#endif /* _SETUP */
    136
    137#else  /* __ASSEMBLY */
    138
    139.macro __RESERVE_BRK name, size
    140	.pushsection .bss..brk, "aw"
    141SYM_DATA_START(__brk_\name)
    142	.skip \size
    143SYM_DATA_END(__brk_\name)
    144	.popsection
    145.endm
    146
    147#define RESERVE_BRK(name, size) __RESERVE_BRK name, size
    148
    149#endif /* __ASSEMBLY__ */
    150
    151#endif /* _ASM_X86_SETUP_H */