Messages in this thread | | | Date | Tue, 01 Jan 2008 14:39:44 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override. |
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Rene Herman wrote: >> >> Yes, we do. It's exactly this side effect which makes this safer than >> either 0x80 or 0xED -- it's a port that *guaranteed* can't be >> reclaimed for other purposes without breaking MS-DOS compatibility. > > I see that with CR0.NE set (*) we indeed don't care about IGNNE#... > > However, I'm worried about this comment in arch/x86/kernel/i8259_32.c > > === > /* > * New motherboards sometimes make IRQ 13 be a PCI interrupt, > * so allow interrupt sharing. > */ > === > > Is it really safe to just blindly negate IRQ13 on everything out there, > from regular PC through funky embedded thingies? >
It's not any IRQ 13, it's IRQ 13 from the FPU.
-hpa
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