diff options
| -rw-r--r-- | Documentation/x86/x86_64/boot-options.txt | 5 | ||||
| -rw-r--r-- | arch/x86/include/asm/acpi.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/acpi/boot.c | 5 | ||||
| -rw-r--r-- | drivers/acpi/apei/hest.c | 3 |
4 files changed, 14 insertions, 1 deletions
diff --git a/Documentation/x86/x86_64/boot-options.txt b/Documentation/x86/x86_64/boot-options.txt index e9e8ddbbf376..1228b22e142b 100644 --- a/Documentation/x86/x86_64/boot-options.txt +++ b/Documentation/x86/x86_64/boot-options.txt @@ -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 diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h index b31bf97775fc..42db2b88953b 100644 --- a/arch/x86/include/asm/acpi.h +++ b/arch/x86/include/asm/acpi.h @@ -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) { } diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 230c8ea878e5..d1998d580080 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -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; diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c index b108b116bf28..502024502b13 100644 --- a/drivers/acpi/apei/hest.c +++ b/drivers/acpi/apei/hest.c @@ -262,7 +262,8 @@ void __init acpi_hest_init(void) goto err; } - apei_hest_parse(hest_parse_cmc, NULL); + if (!acpi_disable_cmcff) + apei_hest_parse(hest_parse_cmc, NULL); if (!ghes_disable) { rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count); |