Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support

From	Ray Jui <rjui@broadcom.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support
Date	2015-11-20 00:10 +0100
Message-ID	<qwGv0-7ug-29@gated-at.bofh.it> (permalink)
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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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Thread

[PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Ray Jui <rjui@broadcom.com> - 2015-11-18 01:40 +0100
  Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Marc Zyngier <marc.zyngier@arm.com> - 2015-11-18 09:50 +0100
    Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Arnd Bergmann <arnd@arndb.de> - 2015-11-18 11:00 +0100
      Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Ray Jui <rjui@broadcom.com> - 2015-11-19 20:30 +0100
    Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Ray Jui <rjui@broadcom.com> - 2015-11-19 02:40 +0100
      Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Ray Jui <rjui@broadcom.com> - 2015-11-19 04:00 +0100
      Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Ray Jui <rjui@broadcom.com> - 2015-11-19 08:30 +0100
      Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Arnd Bergmann <arnd@arndb.de> - 2015-11-19 09:40 +0100
        Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Ray Jui <rjui@broadcom.com> - 2015-11-20 00:10 +0100
      Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Marc Zyngier <marc.zyngier@arm.com> - 2015-11-20 10:00 +0100
        Re: [PATCH 4/5] PCI: iproc: Add iProc PCIe MSI support Ray Jui <rjui@broadcom.com> - 2015-11-20 18:10 +0100

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