Messages in this thread | | | Date | Tue, 08 Jun 2010 11:11:07 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86/sfi: fix ioapic gsi range |
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On 06/08/2010 01:10 AM, Alan Cox wrote: >>> You may not use a 1-1 mapping if you don't have legacy irqs. Linux >>> irqs 0-15 are the ISA irqs you may not use those irq numbers for > > Linux IRQ 0 is "no IRQ assigned", except buried in certain bits of arch > specific historical knowledge. > > Also calling 1-15 ISA IRQ lines is also somewhat misleading given they > are almost certainly routing for PCI devices. "PIC IRQ routing" maybe - > but even that is not really true on a lot of PC hardware today except by > convention.
Yes, but I gather IRQ/GSI 0 is an early-acquire primary timer on MRST on Moorestown just as on PC/AT... just a different one. Hence "special" in the same sort of way. I don't really care, personally, though.
-hpa
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