Re: RFC: MSI/MSI-X implementation

[Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost>]

Hi,

(2014/11/13 11:54), David Young wrote:
> On Fri, Nov 07, 2014 at 04:41:55PM +0900, Kengo NAKAHARA wrote:
> > Could you comment the specification and implementation?
>
> The user should not be on the hook to set processor affinity for the
> interrupts.  That is more properly the responsibility of the designer
> and OS.

I wrote unclear explanation..., so please let me redescribe.

This MSI/MSI-X API *design* is independent from processor affinity.
The device dirvers can use MSI/MSI-X and processor affinity
independently of each other. In other words, legacy interrupts and
INTx interrupts can use processor affinity still. Furthermore,
MSI/MSI-X may or may not use processor affinity.

On the other hand, this MSI/MSI-X API *x86 implementation* is dependent
to my IRQ affinity code, due to I want to commonalize similar code.
# The IRQ affinity code has not merged NetBSD-current yet, so I should
# point out it.

Thanks,

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Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost>