On Wed, 13 Dec 2023 12:50:18 +0000 Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx> wrote: > From: James Morse <james.morse@xxxxxxx> > > Add the new flag field to the MADT's GICC structure. > > 'Online Capable' indicates a disabled CPU can be enabled later. See > ACPI specification 6.5 Tabel 5.37: GICC CPU Interface Flags. > > Signed-off-by: James Morse <james.morse@xxxxxxx> > Tested-by: Miguel Luis <miguel.luis@xxxxxxxxxx> > Tested-by: Vishnu Pajjuri <vishnu@xxxxxxxxxxxxxxxxxxxxxx> > Tested-by: Jianyong Wu <jianyong.wu@xxxxxxx> > Signed-off-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx> I see there is an acpica pull request including this bit but with a different name For reference. https://github.com/acpica/acpica/pull/914/commits/453a5f67567786522021d5f6913f561f8b3cabf6 +CC Lorenzo who submitted that. > --- > This patch probably needs to go via the upstream acpica project, > but is included here so the feature can be tested. > > If the ACPICA header files are updated before merging this patch set, > this patch will need to be dropped. > > Changes since RFC v2: > * Add ACPI specification reference. > --- > 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 */ ACPI_MADT_GICC_ONLINE_CAPABLE > > /* 12: Generic Distributor (ACPI 5.0 + ACPI 6.0 changes) */ >
