* [PATCH] dt-bindings: virtio,mmio: Allow setting devices 'dma-coherent'
@ 2022-03-10 1:35 Rob Herring
2022-03-20 19:08 ` Rob Herring
0 siblings, 1 reply; 2+ messages in thread
From: Rob Herring @ 2022-03-10 1:35 UTC (permalink / raw)
To: Michael S. Tsirkin, Jason Wang, Krzysztof Kozlowski,
Jean-Philippe Brucker
Cc: virtualization, devicetree, linux-kernel
'virtio,mmio' devices are always coherent within a guest. As Arm DTs
are default non-coherent, the 'dma-coherent' property needs to be set on
the virtio device to mark them as such. This aligns with the QEMU 'virt'
machine DTB.
Signed-off-by: Rob Herring <robh@kernel.org>
---
Documentation/devicetree/bindings/virtio/mmio.yaml | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/devicetree/bindings/virtio/mmio.yaml b/Documentation/devicetree/bindings/virtio/mmio.yaml
index 4b7a0273181c..10c22b5bd16a 100644
--- a/Documentation/devicetree/bindings/virtio/mmio.yaml
+++ b/Documentation/devicetree/bindings/virtio/mmio.yaml
@@ -20,6 +20,8 @@ properties:
reg:
maxItems: 1
+ dma-coherent: true
+
interrupts:
maxItems: 1
--
2.32.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] dt-bindings: virtio,mmio: Allow setting devices 'dma-coherent'
2022-03-10 1:35 [PATCH] dt-bindings: virtio,mmio: Allow setting devices 'dma-coherent' Rob Herring
@ 2022-03-20 19:08 ` Rob Herring
0 siblings, 0 replies; 2+ messages in thread
From: Rob Herring @ 2022-03-20 19:08 UTC (permalink / raw)
To: Rob Herring
Cc: virtualization, devicetree, linux-kernel, Jason Wang,
Jean-Philippe Brucker, Michael S. Tsirkin, Krzysztof Kozlowski
On Wed, 09 Mar 2022 19:35:27 -0600, Rob Herring wrote:
> 'virtio,mmio' devices are always coherent within a guest. As Arm DTs
> are default non-coherent, the 'dma-coherent' property needs to be set on
> the virtio device to mark them as such. This aligns with the QEMU 'virt'
> machine DTB.
>
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
> Documentation/devicetree/bindings/virtio/mmio.yaml | 2 ++
> 1 file changed, 2 insertions(+)
>
Applied, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
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