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Re: [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding optio
From: |
Jean-Philippe Brucker |
Subject: |
Re: [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding option |
Date: |
Fri, 7 Feb 2020 11:05:40 +0100 |
Hi Eric,
On Fri, Feb 07, 2020 at 10:32:00AM +0100, Eric Auger wrote:
> At the moment, the kernel only supports device tree
> integration of the virtio-iommu. DT bindings between the
> PCI root complex and the IOMMU must be created by the machine
> in conformance to:
>
> Documentation/devicetree/bindings/virtio/iommu.txt.
>
> To make sure the end-user is aware of this, force him to use the
> temporary device option "x-dt-binding" and also double check the
> machine has a hotplug handler for the virtio-iommu-pci device.
> This hotplug handler is in charge of creating those DT bindings.
>
> Signed-off-by: Eric Auger <address@hidden>
> Suggested-by: Michael S. Tsirkin <address@hidden>
[...]
> @@ -39,6 +42,21 @@ static void virtio_iommu_pci_realize(VirtIOPCIProxy
> *vpci_dev, Error **errp)
> VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev);
> DeviceState *vdev = DEVICE(&dev->vdev);
>
> + if (!dev->dt_binding) {
> + error_setg(errp,
> + "Instantiation currently only is possible if the machine "
> + "creates device tree iommu-map bindings, ie. ACPI is not "
> + "yet supported");
> + error_append_hint(errp, "use -virtio-iommu-pci,x-dt-binding\n");
"use -device virtio-iommu-pci,x-dt-binding"?
Can the option be safely removed as soon as we implement a topology
description for the remaining platforms? Or will we need to carry it
forever for backward-compatibility (ie. ensure that an old command-line
invocation that contains this option still works)?
Thanks,
Jean
- [PATCH v14 01/11] virtio-iommu: Add skeleton, (continued)
- [PATCH v14 01/11] virtio-iommu: Add skeleton, Eric Auger, 2020/02/07
- [PATCH v14 02/11] virtio-iommu: Decode the command payload, Eric Auger, 2020/02/07
- [PATCH v14 03/11] virtio-iommu: Implement attach/detach command, Eric Auger, 2020/02/07
- [PATCH v14 04/11] virtio-iommu: Implement map/unmap, Eric Auger, 2020/02/07
- [PATCH v14 05/11] virtio-iommu: Implement translate, Eric Auger, 2020/02/07
- [PATCH v14 06/11] virtio-iommu: Implement fault reporting, Eric Auger, 2020/02/07
- [PATCH v14 07/11] virtio-iommu-pci: Add virtio iommu pci support, Eric Auger, 2020/02/07
- [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding option, Eric Auger, 2020/02/07
- Re: [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding option,
Jean-Philippe Brucker <=
- Re: [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding option, Auger Eric, 2020/02/07
- Re: [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding option, Michael S. Tsirkin, 2020/02/07
- Re: [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding option, Auger Eric, 2020/02/07
- Re: [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding option, Peter Xu, 2020/02/07
- Re: [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding option, Michael S. Tsirkin, 2020/02/09
- Re: [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding option, Peter Xu, 2020/02/10
Re: [PATCH v14 08/11] virtio-iommu-pci: Introduce the x-dt-binding option, Michael S. Tsirkin, 2020/02/07