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Re: [PATCH] xen/arm, xen/common: Add Kconfig option to control Dom0 boot
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Oleksii Moisieiev <Oleksii_Moisieiev@xxxxxxxx>
- Date: Wed, 23 Jul 2025 14:31:53 +0000
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Oleksandr Tyshchenko <Oleksandr_Tyshchenko@xxxxxxxx>
- Delivery-date: Wed, 23 Jul 2025 14:32:00 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [PATCH] xen/arm, xen/common: Add Kconfig option to control Dom0 boot
Sorry, missed that on my send script
On 23/07/2025 17:29, Jan Beulich wrote:
> On 23.07.2025 16:05, Oleksii Moisieiev wrote:
>> This commit introduces a new Kconfig option, `CONFIG_DOM0_BOOT`, to
>> allow for building Xen without support for booting a regular domain (Dom0).
>> This functionality is primarily intended for the ARM architecture.
>>
>> A new Kconfig symbol, `HAS_DOM0`, has been added and is selected by
>> default for ARM architecture. This symbol signifies that an
>> architecture has the capability to support a Dom0.
>>
>> The `DOM0_BOOT` option depends on `HAS_DOM0` and defaults to 'y'. For
>> expert users, this option can be disabled (`CONFIG_EXPERT=y` and no
>> `CONFIG_DOM0_BOOT` in the config), which will compile out the Dom0
>> creation code on ARM. This is useful for embedded or dom0less-only
>> scenarios to reduce binary size and complexity.
>>
>> The ARM boot path has been updated to panic if it detects a non-dom0less
>> configuration while `CONFIG_DOM0_BOOT` is disabled, preventing an invalid
>> boot.
>>
>> Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev@xxxxxxxx>
> Oh, also - can you please avoid Cc-ing (or even having as To: as you had
> it here) email addresses that will reject replies (see attached)?
>
> Jan
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