diff options
Diffstat (limited to 'drivers/acpi/processor_core.c')
| -rw-r--r-- | drivers/acpi/processor_core.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c index cf34d903f4fb..2e299f27c1eb 100644 --- a/drivers/acpi/processor_core.c +++ b/drivers/acpi/processor_core.c @@ -90,6 +90,27 @@ static int map_lsapic_id(struct acpi_subtable_header *entry, return 1; } +static int map_gic_id(struct acpi_subtable_header *entry, + int device_declaration, u32 acpi_id, int *apic_id) +{ + struct acpi_madt_generic_interrupt *gic = + (struct acpi_madt_generic_interrupt *)entry; + + if (!(gic->flags & ACPI_MADT_ENABLED)) + return 0; + + /* In the GIC interrupt model, logical processors are + * required to have a Processor Device object in the DSDT, + * so we should check device_declaration here + */ + if (device_declaration && (gic->uid == acpi_id)) { + *apic_id = gic->gic_id; + return 1; + } + + return 0; +} + static int map_madt_entry(int type, u32 acpi_id) { unsigned long madt_end, entry; @@ -125,6 +146,9 @@ static int map_madt_entry(int type, u32 acpi_id) } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { if (map_lsapic_id(header, type, acpi_id, &apic_id)) break; + } else if (header->type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) { + if (map_gic_id(header, type, acpi_id, &apic_id)) + break; } entry += header->length; } @@ -155,6 +179,8 @@ static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) map_lapic_id(header, acpi_id, &apic_id); } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { map_lsapic_id(header, type, acpi_id, &apic_id); + } else if (header->type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) { + map_gic_id(header, type, acpi_id, &apic_id); } exit: @@ -209,6 +235,7 @@ int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) if (apic_id == 0) return apic_id; #endif + return -1; } EXPORT_SYMBOL_GPL(acpi_get_cpuid); |