[LinuxBIOS] HT interrupts

yhlu yinghailu at gmail.com
Thu Feb 15 07:18:01 CET 2007

Eric already added HT int support to Linux kernel from 2.6.19.

you could use HT-MSI if you OS doesn't support HT irq directly.


On 2/14/07, Perry Wang <peilien at yahoo.com> wrote:
> Hi,
> Sorry to spam again but I couldn't figure out this on my own.  Questions:
> 1. Does LinuxBIOS actually program the HT interrupt definition registers
> based on the interrupt capability and mobo config, or does Linux do this? Or
> is it up to the driver?
> 2. What's the recommended way of doing HT interrupt that will work with both
> APIC and 8259?  EOI seems to be APIC only (can be turned off in the
> interrupt request) and I guess I can't rely on EOI to always be there?
> 3. EOI in a way acts as flow control.  So without EOI is it possible that I
> can flood the PIC/APIC with too many interrupt packets?  I suppose the
> credit based flow control in HT can take care of this...
> Thanks again
> Perry
> --
> linuxbios mailing list
> linuxbios at linuxbios.org
> http://www.openbios.org/mailman/listinfo/linuxbios

More information about the coreboot mailing list