Messages in this thread | | | Date | Wed, 17 Sep 2008 12:15:42 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC 0/4] dynamically allocate arch specific system vectors |
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Dean Nelson wrote: > > sgi-gru driver > > The GRU is not an actual external device that is connected to an IOAPIC. > The gru is a hardware mechanism that is embedded in the node controller > (UV hub) that directly connects to the cpu socket. Any cpu (with permission) > can do direct loads and stores to the gru. Some of these stores will result > in an interrupt being sent back to the cpu that did the store. > > The interrupt vector used for this interrupt is not in an IOAPIC. Instead > it must be loaded into the GRU at boot or driver initialization time. >
Could you clarify there: is this one vector number per CPU, or are you issuing a specific vector number and just varying the CPU number?
-hpa
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