From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
To: Julien Grall <julien.grall@arm.com>
Cc: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>,
nd@arm.com, sstabellini@kernel.org, xen-devel@lists.xen.org
Subject: Re: [PATCH v1 0/1] xen/arm: zynqmp: Disable PCIe
Date: Tue, 1 Aug 2017 02:01:01 +0200 [thread overview]
Message-ID: <20170801000101.GE12347@toto> (raw)
In-Reply-To: <217597b3-e7c4-1666-b21e-36ca18cd6ca7@arm.com>
On Mon, Jul 31, 2017 at 11:11:39PM +0100, Julien Grall wrote:
>
>
> On 31/07/2017 20:37, Edgar E. Iglesias wrote:
> >From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
> >
> >Hi,
>
> Hi Edgar,
>
>
> >We're seeing panics in dom0 with PCIe enabled due to what seems
> >to be wrongly created mappings by Xen. With older kernels we
> >didn't see the panics but PCIe wasn't functional in dom0.
> >
> >This disables the PCIe nodes on the ZynqMP until Xen/ARM gets
> >more PCIe support.
>
> I feel a bit sad to ack a patch disabling PCIe in the ZynqMP.
>
> Before doing that. Can you describe what is the exact problem with Xen? It
> might be possible that we don't parse correctly the device-tree.
Yes, it was related to the DTB since we had a workaround with a modified
DTB.
Anyway, I was to quick with sending out the patch.
We've been carrying this for a while and your questions prompted me
to have a look again and dig out the details. Turns out I can't reproduce it
with our latest kernel and the latest Xen. I don't know what fixed
it yet but PCIe works ATM both on QEMU models and on real HW.
I don't think it ever has before without modified DTBs.
So please ignore this patch for now :-)
Cheers,
Edgar
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next prev parent reply other threads:[~2017-08-01 0:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-31 19:37 [PATCH v1 0/1] xen/arm: zynqmp: Disable PCIe Edgar E. Iglesias
2017-07-31 19:37 ` [PATCH v1 1/1] xen/arm: Disable PCIe on the ZynqMP Edgar E. Iglesias
2017-07-31 22:11 ` [PATCH v1 0/1] xen/arm: zynqmp: Disable PCIe Julien Grall
2017-08-01 0:01 ` Edgar E. Iglesias [this message]
2017-08-01 20:26 ` Stefano Stabellini
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