Commit 9ad95879 authored by Naveen N. Rao's avatar Naveen N. Rao Committed by Tony Luck
Browse files

mce: acpi/apei: Add a boot option to disable ff mode for corrected errors 



Add a boot option to disable firmware first mode for corrected errors.

Signed-off-by: default avatarNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: default avatarBorislav Petkov <bp@suse.de>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent c3d1fb56

Documentation/x86/x86_64/boot-options.txt

+5 −0
Original line number Diff line number Diff line
@@ -176,6 +176,11 @@ ACPI 


  acpi=noirq	Don't route interrupts



  acpi=nocmcff	Disable firmware first mode for corrected errors. This

		disables parsing the HEST CMC error source to check if

		firmware has set the FF flag. This may result in

		duplicate corrected error reports.



PCI



  pci=off		Don't use PCI

arch/x86/include/asm/acpi.h

+2 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ extern int acpi_pci_disabled; 
extern int acpi_skip_timer_override;

extern int acpi_use_timer_override;

extern int acpi_fix_pin2_polarity;

extern int acpi_disable_cmcff;



extern u8 acpi_sci_flags;

extern int acpi_sci_override_gsi;
@@ -168,6 +169,7 @@ static inline void arch_acpi_set_pdc_bits(u32 *buf) 


#define acpi_lapic 0

#define acpi_ioapic 0

#define acpi_disable_cmcff 0

static inline void acpi_noirq_set(void) { }

static inline void acpi_disable_pci(void) { }

static inline void disable_acpi(void) { }

arch/x86/kernel/acpi/boot.c

+5 −0
Original line number Diff line number Diff line
@@ -66,6 +66,7 @@ EXPORT_SYMBOL(acpi_pci_disabled); 
int acpi_lapic;

int acpi_ioapic;

int acpi_strict;

int acpi_disable_cmcff;



u8 acpi_sci_flags __initdata;

int acpi_sci_override_gsi __initdata;
@@ -1619,6 +1620,10 @@ static int __init parse_acpi(char *arg) 
	/* "acpi=copy_dsdt" copys DSDT */

	else if (strcmp(arg, "copy_dsdt") == 0) {

		acpi_gbl_copy_dsdt_locally = 1;

	}

	/* "acpi=nocmcff" disables FF mode for corrected errors */

	else if (strcmp(arg, "nocmcff") == 0) {

		acpi_disable_cmcff = 1;

	} else {

		/* Core will printk when we return error. */

		return -EINVAL;

drivers/acpi/apei/hest.c

+2 −1
Original line number Diff line number Diff line
@@ -262,6 +262,7 @@ void __init acpi_hest_init(void) 
		goto err;

	}



	if (!acpi_disable_cmcff)

		apei_hest_parse(hest_parse_cmc, NULL);



	if (!ghes_disable) {