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
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#define _ASM_X86_TRAMPOLINE_H
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_X86_TRAMPOLINE
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/*
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* Trampoline 80x86 program as an array.
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*/
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extern const unsigned char trampoline_data [];
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extern const unsigned char trampoline_end [];
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extern unsigned char *trampoline_base;
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extern unsigned long init_rsp;
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extern unsigned long initial_code;
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#define TRAMPOLINE_SIZE roundup(trampoline_end - trampoline_data, PAGE_SIZE)
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#define TRAMPOLINE_BASE 0x6000
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extern unsigned long setup_trampoline(void);
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extern void __init reserve_trampoline_memory(void);
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#else
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static inline void reserve_trampoline_memory(void) {};
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#endif /* CONFIG_X86_TRAMPOLINE */
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_X86_TRAMPOLINE_H */
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