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