From: Haiwei Li <lihaiwei.kernel@gmail.com>
To: Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: peter.maydell@linaro.org, ehabkost@redhat.com,
"Michael S. Tsirkin" <mst@redhat.com>,
richard.henderson@linaro.org, qemu-devel@nongnu.org,
shannon.zhaosl@gmail.com, qemu-arm@nongnu.org,
eric.auger@redhat.com, Paolo Bonzini <pbonzini@redhat.com>,
ani@anisinha.ca, imammedo@redhat.com
Subject: Re: [PATCH v4 00/11] virtio-iommu: Add ACPI support
Date: Wed, 13 Oct 2021 08:56:16 +0800 [thread overview]
Message-ID: <CAB5KdObfNpWPLFFnawrOOpk1FBM+0ue5XgZYE12YAbQ_RPdTcQ@mail.gmail.com> (raw)
In-Reply-To: <YWR1q1bL6a4e4a7v@myrica>
On Tue, Oct 12, 2021 at 1:34 AM Jean-Philippe Brucker
<jean-philippe@linaro.org> wrote:
>
> Hi Haiwei,
>
> On Mon, Oct 11, 2021 at 06:10:07PM +0800, Haiwei Li wrote:
> [...]
> > Gave up waiting for root file system device. Common problems:
> > - Boot args (cat /proc/cmdline)
> > - Check rootdelay= (did the system wait long enough?)
> > - Missing modules (cat /proc/modules; ls /dev)
> > ALERT! UUID=3caf26b5-4d08-43e0-8634-7573269c4f70 does not exist.
> > Dropping to a shell!
> >
> > Any suggestions? Thanks.
>
> It's possible that the rootfs is on a disk behind the IOMMU, and the IOMMU
> driver doesn't get loaded. That could happen, for example, if the
> virtio-iommu module is not present in the initramfs. Since IOMMU drivers
> are typically built into the kernel rather than modules, distro tools that
> build the initramfs might not pick up IOMMU modules. I'm guessing this
> could be the issue here because of the hints and "Dropping to a shell"
> line.
>
> The clean solution will be to patch the initramfs tools to learn about
> IOMMU drivers (I'm somewhat working on that). In the meantime, if this is
> indeed the problem, you could try explicitly adding the virtio-iommu
> module to the initramfs, or building the kernel with CONFIG_VIRTIO_IOMMU=y
> rather than =m, though that requires VIRTIO and VIRTIO_PCI to be built-in
> as well.
Thanks, Jean. It works.
--
Haiwei
next prev parent reply other threads:[~2021-10-13 0:57 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-01 17:33 [PATCH v4 00/11] virtio-iommu: Add ACPI support Jean-Philippe Brucker
2021-10-01 17:33 ` [PATCH v4 01/11] hw/acpi: Add VIOT table Jean-Philippe Brucker
2021-10-06 8:09 ` Igor Mammedov
2021-10-08 15:20 ` Jean-Philippe Brucker
2021-10-01 17:33 ` [PATCH v4 02/11] hw/arm/virt-acpi-build: Add VIOT table for virtio-iommu Jean-Philippe Brucker
2021-10-01 17:33 ` [PATCH v4 03/11] hw/arm/virt: Remove device tree restriction " Jean-Philippe Brucker
2021-10-05 11:57 ` Eric Auger
2021-10-08 15:20 ` Jean-Philippe Brucker
2021-10-01 17:33 ` [PATCH v4 04/11] hw/arm/virt: Reject instantiation of multiple IOMMUs Jean-Philippe Brucker
2021-10-06 6:35 ` Igor Mammedov
2021-10-01 17:33 ` [PATCH v4 05/11] hw/arm/virt: Use object_property_set instead of qdev_prop_set Jean-Philippe Brucker
2021-10-05 9:27 ` Eric Auger
2021-10-06 6:36 ` Igor Mammedov
2021-10-01 17:33 ` [PATCH v4 06/11] hw/i386: Move vIOMMU uniqueness check into pc.c Jean-Philippe Brucker
2021-10-05 11:41 ` Eric Auger
2021-10-01 17:33 ` [PATCH v4 07/11] pc: Allow instantiating a virtio-iommu device Jean-Philippe Brucker
2021-10-05 19:18 ` Eric Auger
2021-10-06 7:19 ` Igor Mammedov
2021-10-08 15:24 ` Jean-Philippe Brucker
2021-10-08 10:46 ` Michael S. Tsirkin
2021-10-01 17:33 ` [PATCH v4 08/11] tests/acpi: allow updates of VIOT expected data files Jean-Philippe Brucker
2021-10-06 8:12 ` Igor Mammedov
2021-10-08 15:26 ` Jean-Philippe Brucker
2021-10-11 15:55 ` Igor Mammedov
2021-10-01 17:33 ` [PATCH v4 09/11] tests/acpi: add test cases for VIOT Jean-Philippe Brucker
2021-10-05 10:27 ` Ani Sinha
2021-10-08 15:27 ` Jean-Philippe Brucker
2021-10-05 19:40 ` Eric Auger
2021-10-06 8:14 ` Igor Mammedov
2021-10-01 17:33 ` [PATCH v4 10/11] tests/acpi: add expected blob for VIOT test on virt machine Jean-Philippe Brucker
2021-10-05 10:04 ` Ani Sinha
2021-10-08 15:33 ` Jean-Philippe Brucker
2021-10-05 19:38 ` Eric Auger
2021-10-08 15:30 ` Jean-Philippe Brucker
2021-10-01 17:33 ` [PATCH v4 11/11] tests/acpi: add expected blobs for VIOT test on q35 machine Jean-Philippe Brucker
2021-10-05 10:07 ` Ani Sinha
2021-10-05 19:41 ` Eric Auger
2021-10-05 15:45 ` [PATCH v4 00/11] virtio-iommu: Add ACPI support Michael S. Tsirkin
2021-10-08 15:17 ` Jean-Philippe Brucker
2021-10-11 10:10 ` Haiwei Li
2021-10-11 17:34 ` Jean-Philippe Brucker
2021-10-13 0:56 ` Haiwei Li [this message]
2021-10-18 15:25 ` Michael S. Tsirkin
2021-10-19 15:39 ` Jean-Philippe Brucker
2021-10-20 15:17 ` Michael S. Tsirkin
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