From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: Re: [9fans] what arch
Date: Fri, 9 May 2014 16:44:51 -0400 [thread overview]
Message-ID: <41ab952ad099c8e959649088b919a620@ladd.quanstro.net> (raw)
In-Reply-To: <CAP6exYL5KwdwKGM-KkFboHXpTt+Xv7o7WnHLm08OPGY1QX-xmg@mail.gmail.com>
> Also, from the Akaros side, we've extended the Plan 9 MSI code to
> support MSI-X and tested it on real hardware; works fine. This allowed
> us to stop worrying about ACPI; you don't need it if you do MSI-X.
> Relief! And MSI-X is in some ways easier than MSI.
i don't see how this could be the case for some pretty common hardware.
for example, i have yet to see a usb controller that will do either
msi or msi-x.
for example, on this machine (random intel)
; pci |grep usb
0.26.0: usb 0c.03.20 8086/1c2d 11 0:fbc23000 1024
0.29.0: usb 0c.03.20 8086/1c26 5 0:fbc22000 1024
; pci -vc 0.26.0 0.29.0
0.26.0: pwrmgmt/01 dbgprt/0a advfeat/13
0.29.0: pwrmgmt/01 dbgprt/0a advfeat/13
nope. it's i/o apic interrupts for me! unless there's some magic way
to convert i/o apic into msi-x that i don't know about. hoping this
is the case....
- erik
next prev parent reply other threads:[~2014-05-09 20:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-09 20:37 ron minnich
2014-05-09 20:44 ` erik quanstrom [this message]
2014-05-09 20:48 ` erik quanstrom
2014-05-09 20:51 ` Bakul Shah
2014-05-09 21:40 ` ron minnich
2014-05-09 21:46 ` Charles Forsyth
2014-05-09 22:05 ` ron minnich
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