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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - arch/x86/kernel/cpu/mcheck/winchip.c
1 // SPDX-License-Identifier: GPL-2.0
3 * IDT Winchip specific Machine Check Exception Reporting
4 * (C) Copyright 2002 Alan Cox <alan@lxorguk.ukuu.org.uk>
6 #include <linux/interrupt.h>
7 #include <linux/kernel.h>
8 #include <linux/types.h>
10 #include <asm/processor.h>
11 #include <asm/traps.h>
12 #include <asm/tlbflush.h>
16 /* Machine check handler for WinChip C6: */
17 static void winchip_machine_check(struct pt_regs
*regs
, long error_code
)
21 pr_emerg("CPU0: Machine Check Exception.\n");
22 add_taint(TAINT_MACHINE_CHECK
, LOCKDEP_NOW_UNRELIABLE
);
27 /* Set up machine check reporting on the Winchip C6 series */
28 void winchip_mcheck_init(struct cpuinfo_x86
*c
)
32 machine_check_vector
= winchip_machine_check
;
33 /* Make sure the vector pointer is visible before we enable MCEs: */
36 rdmsr(MSR_IDT_FCR1
, lo
, hi
);
37 lo
|= (1<<2); /* Enable EIERRINT (int 18 MCE) */
38 lo
&= ~(1<<4); /* Enable MCE */
39 wrmsr(MSR_IDT_FCR1
, lo
, hi
);
41 cr4_set_bits(X86_CR4_MCE
);
43 pr_info("Winchip machine check reporting enabled on CPU#0.\n");