Tarl Neustaedter Tarl.Neustaedter@sun.com writes:
Eric W. Biederman wrote:
The only interesting thing I have is that in when using APICs interrupts are routed differently than when using the legacy x86 PIC.
Ah. That I missed. I'd never thought of interrupts being routed differently depending on something else. Assuming Linux is only going to use APICs, I wouldn't bother describing the legacy PIC, unless I'm missing something about interrupt configuration requiring that information anyway.
The APICs are not always present, and UP kernels tend not to use them. For the Opteron in 64bit mode you could probably not worry about it though.
It has come up too many times in the past that I need to support both that ignoring the legacy PIC in the design is just silly.
We currently can describe both the tables are just a hack and don't adjust when things like pci bus numbers change, or hypertransport unitids change.
Eric