mirror of https://gitee.com/openkylin/linux.git
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* IDT Winchip specific Machine Check Exception Reporting
|
|
* (C) Copyright 2002 Alan Cox <alan@lxorguk.ukuu.org.uk>
|
|
*/
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
|
|
#include <asm/processor.h>
|
|
#include <asm/traps.h>
|
|
#include <asm/tlbflush.h>
|
|
#include <asm/mce.h>
|
|
#include <asm/msr.h>
|
|
|
|
/* Machine check handler for WinChip C6: */
|
|
static void winchip_machine_check(struct pt_regs *regs, long error_code)
|
|
{
|
|
ist_enter(regs);
|
|
|
|
pr_emerg("CPU0: Machine Check Exception.\n");
|
|
add_taint(TAINT_MACHINE_CHECK, LOCKDEP_NOW_UNRELIABLE);
|
|
|
|
ist_exit(regs);
|
|
}
|
|
|
|
/* Set up machine check reporting on the Winchip C6 series */
|
|
void winchip_mcheck_init(struct cpuinfo_x86 *c)
|
|
{
|
|
u32 lo, hi;
|
|
|
|
machine_check_vector = winchip_machine_check;
|
|
/* Make sure the vector pointer is visible before we enable MCEs: */
|
|
wmb();
|
|
|
|
rdmsr(MSR_IDT_FCR1, lo, hi);
|
|
lo |= (1<<2); /* Enable EIERRINT (int 18 MCE) */
|
|
lo &= ~(1<<4); /* Enable MCE */
|
|
wrmsr(MSR_IDT_FCR1, lo, hi);
|
|
|
|
cr4_set_bits(X86_CR4_MCE);
|
|
|
|
pr_info("Winchip machine check reporting enabled on CPU#0.\n");
|
|
}
|