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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5bc329503e
When we are about to kexec a crash kernel and right then and there a broadcasted MCE fires while we're still in the first kernel and while the other CPUs remain in a holding pattern, the #MC handler of the first kernel will timeout and then panic due to never completing MCE synchronization. Handle this in a similar way as to when the CPUs are offlined when that broadcasted MCE happens. [ Boris: rewrote commit message and comments. ] Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Xunlei Pang <xlpang@redhat.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Tony Luck <tony.luck@intel.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: kexec@lists.infradead.org Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/1487857012-9059-1-git-send-email-xlpang@redhat.com Link: http://lkml.kernel.org/r/20170313095019.19351-1-bp@alien8.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
32 lines
811 B
C
32 lines
811 B
C
#ifndef _ASM_X86_REBOOT_H
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#define _ASM_X86_REBOOT_H
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#include <linux/kdebug.h>
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struct pt_regs;
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struct machine_ops {
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void (*restart)(char *cmd);
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void (*halt)(void);
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void (*power_off)(void);
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void (*shutdown)(void);
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void (*crash_shutdown)(struct pt_regs *);
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void (*emergency_restart)(void);
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};
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extern struct machine_ops machine_ops;
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extern int crashing_cpu;
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void native_machine_crash_shutdown(struct pt_regs *regs);
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void native_machine_shutdown(void);
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void __noreturn machine_real_restart(unsigned int type);
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/* These must match dispatch in arch/x86/realmore/rm/reboot.S */
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#define MRR_BIOS 0
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#define MRR_APM 1
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typedef void (*nmi_shootdown_cb)(int, struct pt_regs*);
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void nmi_shootdown_cpus(nmi_shootdown_cb callback);
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void run_crash_ipi_callback(struct pt_regs *regs);
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#endif /* _ASM_X86_REBOOT_H */
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