Re: [PATCH] feat: add support for hyper-v virtual machine

["'MOESSBAUER, Felix' via isar-users" <isar-users@googlegroups.com>]

On Mon, 2026-07-06 at 17:16 +0530, 'Gourav Singh' via isar-users wrote:
> Introduce a new `hyper-v` machine targeting Microsoft Hyper-V virtual
> machines on amd64. The machine uses WIC with an EFI partition layout,
> GRUB as the bootloader, and produces a `.vhdx` disk image alongside
> the `.wic` image.
> 
> Add Kconfig entry, kas machine yaml, machine config, and multiconfig
> files for bullseye, bookworm, and trixie. Register the new multiconfigs
> in mc.conf and document the addition in RECIPE-API-CHANGELOG.md.
> 
> Signed-off-by: Gourav Singh <gouravsingh@siemens.com>
> ---
>  RECIPE-API-CHANGELOG.md                       | 24 +++++++++++++++++++
>  kas/machine/Kconfig                           |  9 +++++++
>  kas/machine/hyper-v.yaml                      |  7 ++++++
>  meta-isar/conf/machine/hyper-v.conf           | 16 +++++++++++++
>  meta-isar/conf/mc.conf                        |  3 +++
>  .../conf/multiconfig/hyper-v-bookworm.conf    |  7 ++++++
>  .../conf/multiconfig/hyper-v-bullseye.conf    |  7 ++++++
>  .../conf/multiconfig/hyper-v-trixie.conf      |  7 ++++++
>  8 files changed, 80 insertions(+)
>  create mode 100644 kas/machine/hyper-v.yaml
>  create mode 100644 meta-isar/conf/machine/hyper-v.conf
>  create mode 100644 meta-isar/conf/multiconfig/hyper-v-bookworm.conf
>  create mode 100644 meta-isar/conf/multiconfig/hyper-v-bullseye.conf
>  create mode 100644 meta-isar/conf/multiconfig/hyper-v-trixie.conf
> 
> diff --git a/RECIPE-API-CHANGELOG.md b/RECIPE-API-CHANGELOG.md
> index 5d2514c0..3c70d681 100644
> --- a/RECIPE-API-CHANGELOG.md
> +++ b/RECIPE-API-CHANGELOG.md
> @@ -1087,3 +1087,27 @@ and `arch=all` binary packages). Recipes for such mixed packages should append
>  `PROVIDES="foo-doc-archall"` for an `arch=all` binary package `foo-doc`).
>  Consumers can then simply reference the package by its original name (e.g.,
>  `foo-doc`).
> +
> +### Add Hyper-V machine support
> +
> +A new machine `hyper-v` has been introduced for building images
> +targeting Microsoft Hyper-V virtual machines on amd64.
> +
> +The machine produces a `.vhdx` disk image using the WIC image type
> +and GRUB as the bootloader. It supports the following Debian codenames:

Hi,

please make it a bit shorter, e.g. "It supports the following Debian
bullseye, bookworm and trixie". The example from below can be left out
in the changelog.

> +
> +- `bullseye`
> +- `bookworm`
> +- `trixie`
> +
> +To build a Hyper-V image:
> +
> +```bash
> +./kas/kas-container --ssh-dir ~/.ssh/ menu
> +```
> +
> +- Select machine: `hyper-v`
> +- Select distro and image type
> +
> +The output `.vhdx` file will be placed in `DEPLOY_DIR_IMAGE` alongside
> +the `.wic` image.

Why alongside and not instead? If the image types are modeled
correctly, only the final one is left in the DEPLOY_DIR_IMAGE.

> diff --git a/kas/machine/Kconfig b/kas/machine/Kconfig
> index 6151716a..9bfdee38 100644
> --- a/kas/machine/Kconfig
> +++ b/kas/machine/Kconfig
> @@ -237,6 +237,14 @@ config MACHINE_VMWARE
>  	select CODENAME_BULLSEYE
>  	select ARCH_AMD64
>  
> +config MACHINE_HYPER_V
> +	bool "hyper-v"
> +	select DISTRO_DEBIAN
> +	select CODENAME_BULLSEYE
> +	select CODENAME_BOOKWORM
> +	select CODENAME_TRIXIE
> +	select ARCH_AMD64
> +
>  config MACHINE_X86_PC
>  	bool "x86 PC"
>  	select DISTRO_DEBIAN
> @@ -280,6 +288,7 @@ config KAS_INCLUDE_MACHINE
>  	default "kas/machine/stm32mp15x.yaml" if MACHINE_STM32MP15X
>  	default "kas/machine/virtualbox.yaml" if MACHINE_VIRTUALBOX
>  	default "kas/machine/vmware.yaml" if MACHINE_VMWARE
> +	default "kas/machine/hyper-v.yaml" if MACHINE_HYPER_V
>  	default "kas/machine/x86-pc.yaml" if MACHINE_X86_PC
>  
>  endmenu
> diff --git a/kas/machine/hyper-v.yaml b/kas/machine/hyper-v.yaml
> new file mode 100644
> index 00000000..e7ff1dc5
> --- /dev/null
> +++ b/kas/machine/hyper-v.yaml
> @@ -0,0 +1,7 @@
> +# This software is a part of ISAR.
> +# Copyright (C) 2026 ilbers GmbH

Why Ilbers? This is a Siemens contribution.

> +
> +header:
> +  version: 14
> +
> +machine: hyper-v
> diff --git a/meta-isar/conf/machine/hyper-v.conf b/meta-isar/conf/machine/hyper-v.conf
> new file mode 100644
> index 00000000..e43483cd
> --- /dev/null
> +++ b/meta-isar/conf/machine/hyper-v.conf
> @@ -0,0 +1,16 @@
> +# This software is a part of Isar.
> +# Copyright (C) 2026 ilbers GmbH
> +#
> +# SPDX-License-Identifier: MIT
> +
> +DISTRO_ARCH ?= "amd64"

Then the machine should be called "hyper-v-amd64.conf".

> +
> +KERNEL_NAME ?= "amd64"
> +
> +WKS_FILE ?= "sdimage-efi"
> +
> +IMAGER_INSTALL:wic += "${GRUB_BOOTLOADER_INSTALL}"
> +
> +IMAGE_FSTYPES ?= "ova"
> +VMDK_SUBFORMAT = "monolithicSparse"
> +VIRTUAL_MACHINE_IMAGE_TYPE = "vhdx"
> diff --git a/meta-isar/conf/mc.conf b/meta-isar/conf/mc.conf
> index 6c7d7840..77118996 100644
> --- a/meta-isar/conf/mc.conf
> +++ b/meta-isar/conf/mc.conf
> @@ -45,6 +45,9 @@ BBMULTICONFIG = " \
>      hikey-bullseye \
>      hikey-bookworm \
>      hikey-trixie \
> +    hyper-v-bullseye \
> +    hyper-v-bookworm \
> +    hyper-v-trixie \

hyper-v-amd64-bullseye (and alike).

>      phyboard-mira-bullseye \
>      phyboard-mira-bookworm \
>      phyboard-mira-trixie \
> diff --git a/meta-isar/conf/multiconfig/hyper-v-bookworm.conf b/meta-isar/conf/multiconfig/hyper-v-bookworm.conf
> new file mode 100644
> index 00000000..0b52d69f
> --- /dev/null
> +++ b/meta-isar/conf/multiconfig/hyper-v-bookworm.conf
> @@ -0,0 +1,7 @@
> +# This software is a part of Isar.
> +# Copyright (C) 2026 ilbers GmbH
> +#
> +# SPDX-License-Identifier: MIT
> +
> +MACHINE ?= "hyper-v"

hyper-v-amd64

> +DISTRO ?= "debian-bookworm"
> diff --git a/meta-isar/conf/multiconfig/hyper-v-bullseye.conf b/meta-isar/conf/multiconfig/hyper-v-bullseye.conf
> new file mode 100644
> index 00000000..9dfbbd43
> --- /dev/null
> +++ b/meta-isar/conf/multiconfig/hyper-v-bullseye.conf
> @@ -0,0 +1,7 @@
> +# This software is a part of Isar.
> +# Copyright (C) 2026 ilbers GmbH
> +#
> +# SPDX-License-Identifier: MIT
> +
> +MACHINE ?= "hyper-v"
> +DISTRO ?= "debian-bullseye"
> diff --git a/meta-isar/conf/multiconfig/hyper-v-trixie.conf b/meta-isar/conf/multiconfig/hyper-v-trixie.conf
> new file mode 100644
> index 00000000..c6299582
> --- /dev/null
> +++ b/meta-isar/conf/multiconfig/hyper-v-trixie.conf
> @@ -0,0 +1,7 @@
> +# This software is a part of Isar.
> +# Copyright (C) 2026 ilbers GmbH

Siemens contribution, hence Siemens Copyright.

Felix

> +#
> +# SPDX-License-Identifier: MIT
> +
> +MACHINE ?= "hyper-v"
> +DISTRO ?= "debian-trixie"
> -- 
> 2.39.5
> 
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