Re: [PATCH v6 0/3] hw/{i2c,nvme}: mctp endpoint, nvme management interface model

[Jonathan Cameron via <qemu-arm@nongnu.org>]

On Thu, 14 Sep 2023 11:53:40 +0200
Klaus Jensen <its@irrelevant.dk> wrote:

> This adds a generic MCTP endpoint model that other devices may derive
> from.
> 
> Also included is a very basic implementation of an NVMe-MI device,
> supporting only a small subset of the required commands.
> 
> Since this all relies on i2c target mode, this can currently only be
> used with an SoC that includes the Aspeed I2C controller.
> 
> The easiest way to get up and running with this, is to grab my buildroot
> overlay[1] (aspeed_ast2600evb_nmi_defconfig). It includes modified a
> modified dts as well as a couple of required packages.
> 
> QEMU can then be launched along these lines:
> 
>   qemu-system-arm \
>     -nographic \
>     -M ast2600-evb \
>     -kernel output/images/zImage \
>     -initrd output/images/rootfs.cpio \
>     -dtb output/images/aspeed-ast2600-evb-nmi.dtb \
>     -nic user,hostfwd=tcp::2222-:22 \
>     -device nmi-i2c,address=0x3a \
>     -serial mon:stdio
> 
> From within the booted system,
> 
>   mctp addr add 8 dev mctpi2c15
>   mctp link set mctpi2c15 up
>   mctp route add 9 via mctpi2c15
>   mctp neigh add 9 dev mctpi2c15 lladdr 0x3a
>   mi-mctp 1 9 info
> 
> Comments are very welcome!
> 
>   [1]: https://github.com/birkelund/hwtests/tree/main/br2-external
> 
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>

Hi Klaus,

Silly question, but who is likely to pick this up? + likely to be soon?

I'm going to post the CXL stuff that makes use of the core support shortly
and whilst I can point at this patch set on list, I'd keen to see it upstream
to reduce the dependencies (it's got 2 sets ahead of it of CXL stuff
anyway but that will all hopefully go through Michael Tsirkin's tree
for PCI stuff in one go).

Jonathan

> ---
> Changes in v6:
> - Use nmi_scratch_append() directly where it makes sense. Fixes bug
>   observed by Andrew.
> - Link to v5: https://lore.kernel.org/r/20230905-nmi-i2c-v5-0-0001d372a728@samsung.com
> 
> Changes in v5:
> - Added a nmi_scratch_append() that asserts available space in the
>   scratch buffer. This is a similar defensive strategy as used in
>   hw/i2c/mctp.c
> - Various small fixups in response to review (Jonathan)
> - Link to v4: https://lore.kernel.org/r/20230823-nmi-i2c-v4-0-2b0f86e5be25@samsung.com
> 
> ---
> Klaus Jensen (3):
>       hw/i2c: add smbus pec utility function
>       hw/i2c: add mctp core
>       hw/nvme: add nvme management interface model
> 
>  MAINTAINERS                   |   7 +
>  hw/arm/Kconfig                |   1 +
>  hw/i2c/Kconfig                |   4 +
>  hw/i2c/mctp.c                 | 432 ++++++++++++++++++++++++++++++++++++++++++
>  hw/i2c/meson.build            |   1 +
>  hw/i2c/smbus_master.c         |  26 +++
>  hw/i2c/trace-events           |  13 ++
>  hw/nvme/Kconfig               |   4 +
>  hw/nvme/meson.build           |   1 +
>  hw/nvme/nmi-i2c.c             | 407 +++++++++++++++++++++++++++++++++++++++
>  hw/nvme/trace-events          |   6 +
>  include/hw/i2c/mctp.h         | 125 ++++++++++++
>  include/hw/i2c/smbus_master.h |   2 +
>  include/net/mctp.h            |  35 ++++
>  14 files changed, 1064 insertions(+)
> ---
> base-commit: 005ad32358f12fe9313a4a01918a55e60d4f39e5
> change-id: 20230822-nmi-i2c-d804ed5be7e6
> 
> Best regards,