From: Bryan O'Donoghue <bod@kernel.org>
To: Brian Daniels <briandaniels@google.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: acourbot@google.com, adelva@google.com, aesteve@redhat.com,
changyeon@google.com, daniel.almeida@collabora.com,
eperezma@redhat.com, gnurou@gmail.com, gurchetansingh@google.com,
hverkuil@xs4all.nl, jasowang@redhat.com,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
mst@redhat.com, nicolas.dufresne@collabora.com,
virtualization@lists.linux.dev, xuanzhuo@linux.alibaba.com
Subject: Re: [PATCH v4 1/8] media: virtio: Add protocol
Date: Tue, 23 Jun 2026 01:57:35 +0100 [thread overview]
Message-ID: <4b2078a0-9422-467b-b167-9a0b5444f18d@kernel.org> (raw)
In-Reply-To: <20260622204343.1994418-2-briandaniels@google.com>
On 22/06/2026 21:43, Brian Daniels wrote:
> + u32 __reserved;
Knowing ~ nothing about virtio with ~ no experience of it I'll offer up
a question/statement anyway.
Aren't your reservations here a bit conservative ? Would you not be well
advised to reserve a bit more space per other virtio protocols ?
➜ grep reserved ./include/uapi/linux/*.h | grep virtio
./include/uapi/linux/virtio_balloon.h: * __u8 reserved[6];
./include/uapi/linux/virtio_balloon.h: * In other words, add explicit
reserved fields to align field and
./include/uapi/linux/virtio_blk.h: __u8 reserved[38];
./include/uapi/linux/virtio_blk.h: __u8 reserved[56];
./include/uapi/linux/virtio_config.h: * VIRTIO_TRANSPORT_F_END are
reserved for the transport
./include/uapi/linux/virtio_crypto.h: __le32 reserved;
./include/uapi/linux/virtio_i2c.h: * Copyright (c) 2021 Intel
Corporation. All rights reserved.
./include/uapi/linux/virtio_input.h: __u8 reserved[5];
./include/uapi/linux/virtio_iommu.h: __u8
reserved[3];
./include/uapi/linux/virtio_iommu.h: __u8
reserved[3];
./include/uapi/linux/virtio_iommu.h: __u8
reserved[3];
./include/uapi/linux/virtio_iommu.h: __u8
reserved[4];
./include/uapi/linux/virtio_iommu.h: __u8
reserved[8];
./include/uapi/linux/virtio_iommu.h: __u8
reserved[4];
./include/uapi/linux/virtio_iommu.h: __u8
reserved[3];
./include/uapi/linux/virtio_iommu.h: __u8
reserved[64];
./include/uapi/linux/virtio_iommu.h: __u8
reserved[3];
./include/uapi/linux/virtio_iommu.h: __u8
reserved2[4];
./include/uapi/linux/virtio_net.h: __le16 reserved[4];
./include/uapi/linux/virtio_net.h: __le16 reserved;
./include/uapi/linux/virtio_net.h: __le16 reserved[3];
./include/uapi/linux/virtio_net.h: __u8 reserved;
./include/uapi/linux/virtio_net.h: __le16 reserved1;
./include/uapi/linux/virtio_pcidev.h: * @VIRTIO_PCIDEV_OP_RESERVED:
reserved to catch errors
./include/uapi/linux/virtio_pcidev.h: * @reserved: reserved
./include/uapi/linux/virtio_pcidev.h: __u16 reserved;
./include/uapi/linux/virtio_pci.h: * 2-65535 - reserved
./include/uapi/linux/virtio_pci.h: /* Unused, reserved for future
extensions. */
./include/uapi/linux/virtio_pci.h: __u8 reserved1[12];
./include/uapi/linux/virtio_pci.h: /* Unused, reserved for future
extensions. */
./include/uapi/linux/virtio_pci.h: __u8 reserved2[4];
./include/uapi/linux/virtio_pci.h: __u8 reserved[7];
./include/uapi/linux/virtio_pci.h: __u8 reserved[6];
./include/uapi/linux/virtio_pci.h: __u8 reserved[6];
./include/uapi/linux/virtio_pci.h: __u8 reserved[2];
./include/uapi/linux/virtio_pci.h: __u8 reserved[7];
./include/uapi/linux/virtio_pci.h: __u8 reserved[7];
./include/uapi/linux/virtio_pci.h: __u8 reserved;
./include/uapi/linux/virtio_pci.h: __le32 reserved;
./include/uapi/linux/virtio_pci.h: __u8 reserved[6];
./include/uapi/linux/virtio_pci.h: __le32 reserved;
./include/uapi/linux/virtio_pci.h: __le32 reserved;
./include/uapi/linux/virtio_pci.h: __le32 reserved;
./include/uapi/linux/virtio_pci.h: __u8 reserved[7];
./include/uapi/linux/virtio_rtc.h: * Copyright (c) 2024 Qualcomm
Innovation Center, Inc. All rights reserved.
./include/uapi/linux/virtio_rtc.h: __u8 reserved[6];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[7];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[6];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[6];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[5];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[6];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[6];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[5];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[5];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[7];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[6];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[7];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[5];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[5];
./include/uapi/linux/virtio_rtc.h: __u8 reserved[6];
./include/uapi/linux/virtio_spi.h: * Copyright (C) 2025 Qualcomm
Innovation Center, Inc. All rights reserved.
./include/uapi/linux/virtio_spi.h: * other bits are reserved as 0,
1-bit transfer is always supported.
./include/uapi/linux/virtio_spi.h: * other bits are reserved as 0,
1-bit transfer is always supported.
./include/uapi/linux/virtio_spi.h: * @reserved: for future use.
./include/uapi/linux/virtio_spi.h: __u8 reserved[3];+ u32
__reserved;
---
bod
next prev parent reply other threads:[~2026-06-23 0:57 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-22 20:43 [PATCH v4 0/8] media: add virtio-media driver Brian Daniels
2026-06-22 20:43 ` [PATCH v4 1/8] media: virtio: Add protocol Brian Daniels
2026-06-22 21:05 ` Michael S. Tsirkin
2026-06-23 0:57 ` Bryan O'Donoghue [this message]
2026-06-22 20:43 ` [PATCH v4 2/8] media: virtio: Add virtio-media driver structs and function declarations Brian Daniels
2026-06-22 21:08 ` Michael S. Tsirkin
2026-06-23 1:09 ` Bryan O'Donoghue
2026-06-22 20:43 ` [PATCH v4 3/8] media: virtio: Add virtio-media session related structures Brian Daniels
2026-06-22 20:43 ` [PATCH v4 4/8] media: virtio: Add scatterlist_builder Brian Daniels
2026-06-22 20:43 ` [PATCH v4 5/8] media: virtio: Add virtio_media_ioctls Brian Daniels
2026-06-22 20:43 ` [PATCH v4 6/8] media: virtio: Add virtio_media_driver Brian Daniels
2026-06-22 21:21 ` Michael S. Tsirkin
2026-06-22 20:43 ` [PATCH v4 7/8] media: virtio: Add virtio-media to the build system Brian Daniels
2026-06-22 20:43 ` [PATCH v4 8/8] media: virtio: Add MAINTAINERS entry Brian Daniels
2026-06-22 21:23 ` Michael S. Tsirkin
2026-06-22 21:09 ` [PATCH v4 0/8] media: add virtio-media driver Michael S. Tsirkin
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