Messages in this thread | | | Subject | Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support | From | Ray Jui <> | Date | Thu, 19 Nov 2015 15:05:31 -0800 |
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Hi Arnd,
On 11/19/2015 12:31 AM, Arnd Bergmann wrote: > On Wednesday 18 November 2015 17:37:16 Ray Jui wrote:
>> I haven't spent too much time investigating, and am hoping to eventually >> enable affinity support with an incremental patch in the future when I >> have more time to investigate. > > Is it possible that you have a set of MSIs per GIC interrupt (as Marc > suggested earlier) and that the way it is intended to be used is by > having each one of them target a different CPU? That way you can do > affinity by switching to a different MSI in .set_affinity(), I think > that is how the old style MSI all used to work when each CPU had its > own MSI register. > > Arnd >
Okay, I see that Xgene MSI has a very similar implementation to support MSI IRQ affinity. I plan to take a closer look and try it out in the future. But it likely won't be included in the current round of patch set.
Thanks,
Ray
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