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Ping: [PATCH v3] SUPPORT.md: split XSM from Flask
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 4 Sep 2024 10:03:02 +0200
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- Cc: Daniel Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 04 Sep 2024 08:03:09 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 14.08.2024 09:44, Jan Beulich wrote:
> XSM is a generic framework, which in particular is also used by SILO.
> With this it can't really be experimental: Arm mandates SILO for having
> a security supported configuration.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> ---
> v3: Add explanations. Another terminology adjustment.
> v2: Terminology adjustments. Stronger description.
Are yet further adjustments needed?
Jan
> --- a/SUPPORT.md
> +++ b/SUPPORT.md
> @@ -769,13 +769,21 @@ Compile time disabled for ARM by default
>
> Status, x86: Supported, not security supported
>
> -### XSM & FLASK
> +### XSM (Xen Security Module) Framework
> +
> +XSM is a security policy framework. The dummy implementation is covered by
> this
> +statement, and implements a policy whereby dom0 is all powerful. See below
> for
> +alternative modules (FLASK, SILO).
> +
> + Status: Supported
> +
> +### FLASK XSM Module
>
> Status: Experimental
>
> Compile time disabled by default.
>
> -Also note that using XSM
> +Also note that using FLASK
> to delegate various domain control hypercalls
> to particular other domains, rather than only permitting use by dom0,
> is also specifically excluded from security support for many hypercalls.
> @@ -788,6 +796,13 @@ Please see XSA-77 for more details.
> The default policy includes FLASK labels and roles for a "typical" Xen-based
> system
> with dom0, driver domains, stub domains, domUs, and so on.
>
> +### SILO XSM Module
> +
> +SILO implements a policy whereby DomU-s can only communicate with Dom0, yet
> not
> +with each other.
> +
> + Status: Supported
> +
> ## Virtual Hardware, Hypervisor
>
> ### x86/Nested PV
|
