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Re: [Qemu-devel] [PATCH 0/2] pci-assign: MSI affinity support
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From: |
Jan Kiszka |
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Subject: |
Re: [Qemu-devel] [PATCH 0/2] pci-assign: MSI affinity support |
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Date: |
Fri, 10 May 2013 14:40:04 +0200 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2013-05-09 18:35, Alex Williamson wrote:
> I posted these about 6 months ago and Jan felt we should implement
> MSI notifiers like we have for MSI-X. That still hasn't happened.
Device assignments are the only currently known users - and you provide
this feature, so...
POWER does this nice configuration of MSI messages via a side channel.
Not that it already fires the MSI-X notifiers properly, but a generic
notifier based approach is the right way to abstract away the different
modification channels (instead of encoding them at the consumer side
like in your patches).
Moreover, having different designs for MSI and MSI-X is just ugly.
Jan
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Siemens AG, Corporate Technology, CT RTC ITP SDP-DE
Corporate Competence Center Embedded Linux