On Wed, 13 Sep 2023 16:38:15 +0000 James Morse <james.morse@xxxxxxx> wrote: > Add the new flag field to the MADT's GICC structure. > > 'Online Capable' indicates a disabled CPU can be enabled later. > > Signed-off-by: James Morse <james.morse@xxxxxxx> Why [code first?] it's in ACPI 6.5 https://uefi.org/sites/default/files/resources/ACPI_Spec_6_5_Aug29.pdf Spec reference would be good though. It's 6.5 Tabel 5.37: GICC CPU Interface Flags I think > --- > This patch probably needs to go via the upstream acpica project, > but is included here so the feature can be testd. tested > --- > include/acpi/actbl2.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h > index 3751ae69432f..c433a079d8e1 100644 > --- a/include/acpi/actbl2.h > +++ b/include/acpi/actbl2.h > @@ -1046,6 +1046,7 @@ struct acpi_madt_generic_interrupt { > /* ACPI_MADT_ENABLED (1) Processor is usable if set */ > #define ACPI_MADT_PERFORMANCE_IRQ_MODE (1<<1) /* 01: Performance Interrupt Mode */ > #define ACPI_MADT_VGIC_IRQ_MODE (1<<2) /* 02: VGIC Maintenance Interrupt mode */ > +#define ACPI_MADT_GICC_CPU_CAPABLE (1<<3) /* 03: CPU is online capable */ bikeshed colour time.... It's capable of being a CPU? ACPI_MADT_GICC_ONLINE_CAPABLE GICC already tells us it's a CPU (last C) despite the table in ACPI being labeled Table 5.37: GICC CPU Interface table > > /* 12: Generic Distributor (ACPI 5.0 + ACPI 6.0 changes) */ >
