Release 4.14 arch/x86/kernel/cpu/mcheck/winchip.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);
}

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16.67%
Rusty Russell
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Chen Yucong
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/* 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");
}
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9.09%
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17
12.69%
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27.27%
Andi Kleen
5
3.73%
1
9.09%
Ingo Molnar
5
3.73%
1
9.09%
Chen Yucong
2
1.49%
1
9.09%
Rusty Russell
2
1.49%
1
9.09%
Hidetoshi Seto
2
1.49%
1
9.09%
Alan Cox
1
0.75%
1
9.09%
Greg Kroah-Hartman
1
0.75%
1
9.09%
Total
134
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11
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Directory: arch/x86/kernel/cpu/mcheck

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