mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
3e1e9002aa
Impact: fix trampoline sizing bug, save space While debugging a suspend-to-RAM related issue it occured to me that if the trampoline code had grown past 4 KB, we would have been allocating too little memory for it, since the 4 KB size of the trampoline is hardcoded into arch/x86/kernel/e820.c . Change that by making the kernel compute the trampoline size and allocate as much memory as necessary. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
29 lines
726 B
C
29 lines
726 B
C
#ifndef _ASM_X86_TRAMPOLINE_H
|
|
#define _ASM_X86_TRAMPOLINE_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#ifdef CONFIG_X86_TRAMPOLINE
|
|
/*
|
|
* Trampoline 80x86 program as an array.
|
|
*/
|
|
extern const unsigned char trampoline_data [];
|
|
extern const unsigned char trampoline_end [];
|
|
extern unsigned char *trampoline_base;
|
|
|
|
extern unsigned long init_rsp;
|
|
extern unsigned long initial_code;
|
|
|
|
#define TRAMPOLINE_SIZE roundup(trampoline_end - trampoline_data, PAGE_SIZE)
|
|
#define TRAMPOLINE_BASE 0x6000
|
|
|
|
extern unsigned long setup_trampoline(void);
|
|
extern void __init reserve_trampoline_memory(void);
|
|
#else
|
|
static inline void reserve_trampoline_memory(void) {};
|
|
#endif /* CONFIG_X86_TRAMPOLINE */
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_X86_TRAMPOLINE_H */
|