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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ac630dd98a
The code requires the use of the proper per-exception-vector stub
functions (set up as the early_idt_handlers[] array - note the 's') that
make sure to set up the error vector number. This is true regardless of
whether CONFIG_EARLY_PRINTK is set or not.
Why? The stack offset for the comparison of __KERNEL_CS won't be right
otherwise, nor will the new check (from commit 8170e6bed4: "x86,
64bit: Use a #PF handler to materialize early mappings on demand") for
the page fault exception vector.
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
25 lines
478 B
C
25 lines
478 B
C
#ifndef _ASM_X86_PROTO_H
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#define _ASM_X86_PROTO_H
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#include <asm/ldt.h>
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/* misc architecture specific prototypes */
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void system_call(void);
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void syscall_init(void);
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void ia32_syscall(void);
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void ia32_cstar_target(void);
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void ia32_sysenter_target(void);
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void syscall32_cpu_init(void);
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void x86_configure_nx(void);
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void x86_report_nx(void);
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extern int reboot_force;
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long do_arch_prctl(struct task_struct *task, int code, unsigned long addr);
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#endif /* _ASM_X86_PROTO_H */
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