From: Oleksandr <olekstysh@gmail.com>
To: Stefano Stabellini <sstabellini@kernel.org>
Cc: xen-devel@lists.xenproject.org,
virtualization@lists.linux-foundation.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Julien Grall <julien@xen.org>, Juergen Gross <jgross@suse.com>,
Christoph Hellwig <hch@infradead.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [RFC PATCH 3/6] dt-bindings: xen: Add xen,dev-domid property description for xen-virtio layer
Date: Sun, 17 Apr 2022 20:24:07 +0300 [thread overview]
Message-ID: <fd3a53da-e3a4-5503-30d7-07b180c6d227@gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.22.394.2204151300130.915916@ubuntu-linux-20-04-desktop>
On 16.04.22 01:01, Stefano Stabellini wrote:
Hello Stefano
> On Thu, 14 Apr 2022, Oleksandr Tyshchenko wrote:
>> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
>>
>> Introduce Xen specific binding for the virtio-mmio device to be used
>> by Xen virtio support driver in a subsequent commit.
>>
>> This binding specifies the ID of Xen domain where the corresponding
>> device (backend) resides. This is needed for the option to restrict
>> memory access using Xen grant mappings to work.
>>
>> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
>> ---
>> .../devicetree/bindings/virtio/xen,dev-domid.yaml | 39 ++++++++++++++++++++++
>> 1 file changed, 39 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/virtio/xen,dev-domid.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/virtio/xen,dev-domid.yaml b/Documentation/devicetree/bindings/virtio/xen,dev-domid.yaml
>> new file mode 100644
>> index 00000000..78be993
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/virtio/xen,dev-domid.yaml
>> @@ -0,0 +1,39 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/virtio/xen,dev-domid.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Xen specific binding for the virtio device
>> +
>> +maintainers:
>> + - Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
>> +
>> +select: true
>> +
>> +description:
>> + This binding specifies the ID of Xen domain where the corresponding device
>> + (backend) resides. This is needed for the option to restrict memory access
>> + using Xen grant mappings to work.
>> +
>> + Note that current and generic "iommus" bindings are mutually exclusive, since
>> + the restricted memory access model on Xen behaves as a kind of software IOMMU.
> I don't think that this last statement is necessary or fully accurate, so
> I would remove it.
ok, will remove
> Other than that, this looks good to me.
thank you
>
>
>> +properties:
>> + xen,dev-domid:
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + description:
>> + Should contain the ID of device's domain.
> Maybe better as:
> "The domid (domain ID) of the domain where the device (backend) is running"
ok, will change
>
>
>
>> +additionalProperties: true
>> +
>> +examples:
>> + - |
>> + virtio_block@3000 {
>> + compatible = "virtio,mmio";
>> + reg = <0x3000 0x100>;
>> + interrupts = <41>;
>> +
>> + /* The device is located in Xen domain with ID 1 */
>> + xen,dev-domid = <1>;
>> + };
>> --
>> 2.7.4
>>
--
Regards,
Oleksandr Tyshchenko
next prev parent reply other threads:[~2022-04-17 17:24 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-14 19:19 [RFC PATCH 0/6] virtio: Solution to restrict memory access under Xen using xen-virtio DMA ops layer Oleksandr Tyshchenko
2022-04-14 19:19 ` [RFC PATCH 1/6] xen/grants: support allocating consecutive grants Oleksandr Tyshchenko
2022-04-14 19:19 ` [RFC PATCH 2/6] virtio: add option to restrict memory access under Xen Oleksandr Tyshchenko
2022-04-14 19:43 ` H. Peter Anvin
2022-04-15 15:20 ` Oleksandr
2022-04-15 22:01 ` Stefano Stabellini
2022-04-17 17:02 ` Oleksandr
2022-04-18 19:11 ` Stefano Stabellini
2022-04-19 6:21 ` Juergen Gross
2022-04-19 6:37 ` Oleksandr
2022-04-14 19:19 ` [RFC PATCH 3/6] dt-bindings: xen: Add xen,dev-domid property description for xen-virtio layer Oleksandr Tyshchenko
2022-04-15 22:01 ` Stefano Stabellini
2022-04-17 17:24 ` Oleksandr [this message]
2022-04-14 19:19 ` [RFC PATCH 4/6] virtio: Various updates to xen-virtio DMA ops layer Oleksandr Tyshchenko
2022-04-15 22:02 ` Stefano Stabellini
2022-04-17 18:21 ` Oleksandr
2022-04-18 19:11 ` Stefano Stabellini
2022-04-19 6:58 ` Juergen Gross
2022-04-19 7:07 ` Oleksandr
2022-04-16 6:05 ` Christoph Hellwig
2022-04-17 18:39 ` Oleksandr
2022-04-14 19:19 ` [RFC PATCH 5/6] arm/xen: Introduce xen_setup_dma_ops() Oleksandr Tyshchenko
2022-04-15 22:02 ` Stefano Stabellini
2022-04-17 18:43 ` Oleksandr
2022-04-14 19:19 ` [RFC PATCH 6/6] arm/xen: Assign xen-virtio DMA ops for virtio devices in Xen guests Oleksandr Tyshchenko
2022-04-15 22:02 ` Stefano Stabellini
2022-04-16 6:07 ` Christoph Hellwig
2022-04-17 21:05 ` Oleksandr
2022-04-18 19:11 ` Stefano Stabellini
2022-04-19 12:17 ` Oleksandr
2022-04-19 14:48 ` Juergen Gross
2022-04-19 17:11 ` Oleksandr
2022-04-20 0:23 ` Stefano Stabellini
2022-04-20 9:00 ` Oleksandr
2022-04-20 22:49 ` Stefano Stabellini
2022-04-17 19:20 ` Oleksandr
2022-04-15 7:41 ` [RFC PATCH 0/6] virtio: Solution to restrict memory access under Xen using xen-virtio DMA ops layer Christoph Hellwig
2022-04-15 10:04 ` Oleksandr
2022-04-15 8:44 ` Michael S. Tsirkin
2022-04-15 15:29 ` Oleksandr
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