On Thu, 24 Nov 2022 16:41:41 +0800, Rahul Tanwar wrote: > Intel defines a few possible interrupt delivery modes. With respect > to boot/init time, mainly two interrupt delivery modes are possible. > PIC Mode - Legacy external 8259 compliant PIC interrupt controller. > Virtual Wire Mode - use lapic as virtual wire interrupt delivery mode. > > For ACPI or MPS spec compliant systems, it is figured out by some read > only bit field/s available in their respective defined data structures. > But for OF based systems, it is by default set to PIC mode. Presently, > it is hardcoded to legacy PIC mode for OF based x86 systems with no > option to choose the configuration between PIC mode & virtual wire mode. > > For this purpose, introduce a new boolean property for interrupt > controller node of lapic which can allow it to be configured to virtual > wire mode as well. > > Property name: 'intel,virtual-wire-mode' > Type: Boolean > > If not present/not defined, interrupt delivery mode defaults to legacy PIC > mode. If present/defined, interrupt delivery mode is set to virtual wire > mode. > > Suggested-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> > Signed-off-by: Rahul Tanwar <rtanwar@xxxxxxxxxxxxx> > --- > .../interrupt-controller/intel,ce4100-lapic.yaml | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
