x86/mce: Streamline MCE subsystem's naming

Rename the containing folder to "mce" which is the most widespread name.
Drop the "mce[-_]" filename prefix of some compilation units (while
others don't have it).

This unifies the file naming in the MCE subsystem:

mce/
|-- amd.c
|-- apei.c
|-- core.c
|-- dev-mcelog.c
|-- genpool.c
|-- inject.c
|-- intel.c
|-- internal.h
|-- Makefile
|-- p5.c
|-- severity.c
|-- therm_throt.c
|-- threshold.c
`-- winchip.c

No functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20181205141323.14995-1-bp@alien8.de

1 files changed, 44 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/mce/winchip.c b/arch/x86/kernel/cpu/mce/winchip.c
new file mode 100644
index 000000000000..3b45b270a865
--- /dev/null
+++ b/arch/x86/kernel/cpu/mce/winchip.c
@@ -0,0 +1,44 @@
+// 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");
+}