From: Gerd Hoffmann <kraxel@redhat.com>
To: walimis <walimisdev@gmail.com>
Cc: Peter Crosthwaite <peter.crosthwaite@xilinx.com>,
john.williams@xilinx.com, david.holsgrove@xilinx.com,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 1.3] ehci-sysbus: Attach DMA context.
Date: Mon, 03 Dec 2012 13:51:00 +0100 [thread overview]
Message-ID: <50BCA034.2090301@redhat.com> (raw)
In-Reply-To: <20121203120309.GD6029@pek-lwang0-d1>
Hi,
> As said in another mail, I found that the root cause is that xilinx_zynq has
> two EHCI controller. If we use usb-storage disk, the disk will be attached to
> the second EHCI controller, which the kernel uses the first EHCI controller
> by default.
For the linux kernel it shouldn't matter where the usb stick is
connected. Assuming it finds both ehci controllers. Does it?
> For now, qemu doesn't support two EHCI controller, could we remove the second
> EHCI from xilinx_zynq?
Two controllers should work just fine. I'd suggest to find the root
cause instead of doctoring like this. ehci + usb core are fine with two
controllers & busses, maybe the arch plumbing (device tree?) misses
something so the linux kernel doesn't find the second ehci controller.
cheers,
Gerd
next prev parent reply other threads:[~2012-12-03 12:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-29 1:43 [Qemu-devel] [PATCH 1.3] ehci-sysbus: Attach DMA context Peter Crosthwaite
2012-11-29 2:00 ` walimis
2012-11-29 2:05 ` Peter Crosthwaite
2012-12-03 12:03 ` walimis
2012-12-03 12:51 ` Gerd Hoffmann [this message]
2012-12-03 14:50 ` walimis
2012-12-04 5:16 ` Peter Crosthwaite
2012-12-04 6:49 ` walimis
2012-12-04 8:15 ` Gerd Hoffmann
2012-12-05 7:07 ` Peter Crosthwaite
2012-11-29 6:57 ` Gerd Hoffmann
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