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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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2965faa5e0
There are two kexec load syscalls, kexec_load another and kexec_file_load. kexec_file_load has been splited as kernel/kexec_file.c. In this patch I split kexec_load syscall code to kernel/kexec.c. And add a new kconfig option KEXEC_CORE, so we can disable kexec_load and use kexec_file_load only, or vice verse. The original requirement is from Ted Ts'o, he want kexec kernel signature being checked with CONFIG_KEXEC_VERIFY_SIG enabled. But kexec-tools use kexec_load syscall can bypass the checking. Vivek Goyal proposed to create a common kconfig option so user can compile in only one syscall for loading kexec kernel. KEXEC/KEXEC_FILE selects KEXEC_CORE so that old config files still work. Because there's general code need CONFIG_KEXEC_CORE, so I updated all the architecture Kconfig with a new option KEXEC_CORE, and let KEXEC selects KEXEC_CORE in arch Kconfig. Also updated general kernel code with to kexec_load syscall. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Dave Young <dyoung@redhat.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Petr Tesarik <ptesarik@suse.cz> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Josh Boyer <jwboyer@fedoraproject.org> Cc: David Howells <dhowells@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
40 lines
942 B
C
40 lines
942 B
C
#ifndef _ASM_X86_KDEBUG_H
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#define _ASM_X86_KDEBUG_H
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#include <linux/notifier.h>
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struct pt_regs;
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/* Grossly misnamed. */
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enum die_val {
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DIE_OOPS = 1,
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DIE_INT3,
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DIE_DEBUG,
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DIE_PANIC,
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DIE_NMI,
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DIE_DIE,
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DIE_KERNELDEBUG,
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DIE_TRAP,
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DIE_GPF,
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DIE_CALL,
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DIE_PAGE_FAULT,
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DIE_NMIUNKNOWN,
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};
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extern void printk_address(unsigned long address);
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extern void die(const char *, struct pt_regs *,long);
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extern int __must_check __die(const char *, struct pt_regs *, long);
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extern void show_trace(struct task_struct *t, struct pt_regs *regs,
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unsigned long *sp, unsigned long bp);
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extern void __show_regs(struct pt_regs *regs, int all);
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extern unsigned long oops_begin(void);
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extern void oops_end(unsigned long, struct pt_regs *, int signr);
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#ifdef CONFIG_KEXEC_CORE
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extern int in_crash_kexec;
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#else
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/* no crash dump is ever in progress if no crash kernel can be kexec'd */
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#define in_crash_kexec 0
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#endif
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#endif /* _ASM_X86_KDEBUG_H */
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