42b682a30f
conventions so that former can be converted to C eventually - Simplify PUSH_AND_CLEAR_REGS so that it can be used at the system call entry paths instead of having opencoded, slightly different variants of it everywhere - Misc other fixes -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmKLeQEACgkQEsHwGGHe VUqFqQ/6AkVfWa9EMnmOcFcUYHjK7srsv7kzppc2P6ly98QOJFsCYagPRHVHXGZF k4Dezk29j2d4AjVdGot/CpTlRezSe0dmPxTcH5QD+SpiJ8bSgMrnH/0La+No0ypi VabOZgQaHWIUboccpE77oIRdglun/ZnePN3gRdBRtQWgmeQZVWxD6ly6L1Ptp1Lk nBXVMpH2h5agLjulsw7j7PihrbM6RFf3qSw4GkaQAAxooxb2i7qb05sG347lm72l 3ppsHtP80MKCmJpe20O+V+O4Hvq1/XJ18Tin6p1bhqSe0PW2pS5QUN7ziF/5orvH 9p8PVWrrH6kTaK1NJilGYG4eIeyuWhSVnObgFqbe7RIITy5eCYXyaq5PLqVahWFD qk1+Z3nsS6g6BLu10dFACnPq7O+6tVEWsoOZ2D4XJAV/zThbEwE75E4rW6x07gnm s0BzXgtzb0s35L46jzTctc9RtdCRFjZmD+iHXSqjEfH/dyS1tsvXX6z5wBTb5qn3 FQE3sVtZs0e5yIFAfp19hzmweY/Mgu9b1p+IfkhQhInrLyJNwUVsMkpH1WFdkL5/ RZWtURuYO7lE6Iw1wwZPL691A7hx+1cE9YWuEBH2Il6byJa4UWP4azXCx1nbMFKk E5ZDKL3iRsDPVI+k+D6NwBN19ih2LAmT2Mxcg1EOV434LLlkHsk= =P80f -----END PGP SIGNATURE----- Merge tag 'x86_asm_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 asm updates from Borislav Petkov: - A bunch of changes towards streamlining low level asm helpers' calling conventions so that former can be converted to C eventually - Simplify PUSH_AND_CLEAR_REGS so that it can be used at the system call entry paths instead of having opencoded, slightly different variants of it everywhere - Misc other fixes * tag 'x86_asm_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/entry: Fix register corruption in compat syscall objtool: Fix STACK_FRAME_NON_STANDARD reloc type linkage: Fix issue with missing symbol size x86/entry: Remove skip_r11rcx x86/entry: Use PUSH_AND_CLEAR_REGS for compat x86/entry: Simplify entry_INT80_compat() x86/mm: Simplify RESERVE_BRK() x86/entry: Convert SWAPGS to swapgs and remove the definition of SWAPGS x86/entry: Don't call error_entry() for XENPV x86/entry: Move CLD to the start of the idtentry macro x86/entry: Move PUSH_AND_CLEAR_REGS out of error_entry() x86/entry: Switch the stack after error_entry() returns x86/traps: Use pt_regs directly in fixup_bad_iret()
145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_SETUP_H
|
|
#define _ASM_X86_SETUP_H
|
|
|
|
#include <uapi/asm/setup.h>
|
|
|
|
#define COMMAND_LINE_SIZE 2048
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/page_types.h>
|
|
#include <asm/ibt.h>
|
|
|
|
#ifdef __i386__
|
|
|
|
#include <linux/pfn.h>
|
|
/*
|
|
* Reserved space for vmalloc and iomap - defined in asm/page.h
|
|
*/
|
|
#define MAXMEM_PFN PFN_DOWN(MAXMEM)
|
|
#define MAX_NONPAE_PFN (1 << 20)
|
|
|
|
#endif /* __i386__ */
|
|
|
|
#define PARAM_SIZE 4096 /* sizeof(struct boot_params) */
|
|
|
|
#define OLD_CL_MAGIC 0xA33F
|
|
#define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */
|
|
#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/bootparam.h>
|
|
#include <asm/x86_init.h>
|
|
|
|
extern u64 relocated_ramdisk;
|
|
|
|
/* Interrupt control for vSMPowered x86_64 systems */
|
|
#ifdef CONFIG_X86_64
|
|
void vsmp_init(void);
|
|
#else
|
|
static inline void vsmp_init(void) { }
|
|
#endif
|
|
|
|
struct pt_regs;
|
|
|
|
void setup_bios_corruption_check(void);
|
|
void early_platform_quirks(void);
|
|
|
|
extern unsigned long saved_video_mode;
|
|
|
|
extern void reserve_standard_io_resources(void);
|
|
extern void i386_reserve_resources(void);
|
|
extern unsigned long __startup_64(unsigned long physaddr, struct boot_params *bp);
|
|
extern void startup_64_setup_env(unsigned long physbase);
|
|
extern void early_setup_idt(void);
|
|
extern void __init do_early_exception(struct pt_regs *regs, int trapnr);
|
|
|
|
#ifdef CONFIG_X86_INTEL_MID
|
|
extern void x86_intel_mid_early_setup(void);
|
|
#else
|
|
static inline void x86_intel_mid_early_setup(void) { }
|
|
#endif
|
|
|
|
#ifdef CONFIG_X86_INTEL_CE
|
|
extern void x86_ce4100_early_setup(void);
|
|
#else
|
|
static inline void x86_ce4100_early_setup(void) { }
|
|
#endif
|
|
|
|
#ifndef _SETUP
|
|
|
|
#include <asm/espfix.h>
|
|
#include <linux/kernel.h>
|
|
|
|
/*
|
|
* This is set up by the setup-routine at boot-time
|
|
*/
|
|
extern struct boot_params boot_params;
|
|
extern char _text[];
|
|
|
|
static inline bool kaslr_enabled(void)
|
|
{
|
|
return IS_ENABLED(CONFIG_RANDOMIZE_MEMORY) &&
|
|
!!(boot_params.hdr.loadflags & KASLR_FLAG);
|
|
}
|
|
|
|
/*
|
|
* Apply no randomization if KASLR was disabled at boot or if KASAN
|
|
* is enabled. KASAN shadow mappings rely on regions being PGD aligned.
|
|
*/
|
|
static inline bool kaslr_memory_enabled(void)
|
|
{
|
|
return kaslr_enabled() && !IS_ENABLED(CONFIG_KASAN);
|
|
}
|
|
|
|
static inline unsigned long kaslr_offset(void)
|
|
{
|
|
return (unsigned long)&_text - __START_KERNEL;
|
|
}
|
|
|
|
/*
|
|
* Do NOT EVER look at the BIOS memory size location.
|
|
* It does not work on many machines.
|
|
*/
|
|
#define LOWMEMSIZE() (0x9f000)
|
|
|
|
/* exceedingly early brk-like allocator */
|
|
extern unsigned long _brk_end;
|
|
void *extend_brk(size_t size, size_t align);
|
|
|
|
/*
|
|
* Reserve space in the brk section. The name must be unique within the file,
|
|
* and somewhat descriptive. The size is in bytes.
|
|
*
|
|
* The allocation is done using inline asm (rather than using a section
|
|
* attribute on a normal variable) in order to allow the use of @nobits, so
|
|
* that it doesn't take up any space in the vmlinux file.
|
|
*/
|
|
#define RESERVE_BRK(name, size) \
|
|
asm(".pushsection .brk_reservation,\"aw\",@nobits\n\t" \
|
|
".brk." #name ":\n\t" \
|
|
".skip " __stringify(size) "\n\t" \
|
|
".size .brk." #name ", " __stringify(size) "\n\t" \
|
|
".popsection\n\t")
|
|
|
|
extern void probe_roms(void);
|
|
#ifdef __i386__
|
|
|
|
asmlinkage void __init i386_start_kernel(void);
|
|
|
|
#else
|
|
asmlinkage void __init x86_64_start_kernel(char *real_mode);
|
|
asmlinkage void __init x86_64_start_reservations(char *real_mode_data);
|
|
|
|
#endif /* __i386__ */
|
|
#endif /* _SETUP */
|
|
#else
|
|
#define RESERVE_BRK(name,sz) \
|
|
.pushsection .brk_reservation,"aw",@nobits; \
|
|
.brk.name: \
|
|
1: .skip sz; \
|
|
.size .brk.name,.-1b; \
|
|
.popsection
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* _ASM_X86_SETUP_H */
|