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Re: [PATCH v2 8/8] x86/iommu: make AMD-Vi and Intel VT-d support configurable
- To: Xenia Ragiadakou <burzalodowa@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 12 Jan 2023 13:38:42 +0100
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- Cc: Paul Durrant <paul@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 12 Jan 2023 12:38:51 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 04.01.2023 09:45, Xenia Ragiadakou wrote:
> Provide the user with configuration control over the IOMMU support by making
> AMD_IOMMU and INTEL_IOMMU options user selectable and able to be turned off.
>
> However, there are cases where the IOMMU support is required, for instance for
> a system with more than 254 CPUs. In order to prevent users from unknowingly
> disabling it and ending up with a broken hypervisor, make the support user
> selectable only if EXPERT is enabled.
>
> To preserve the current default configuration of an x86 system, both options
> depend on X86 and default to Y.
>
> Signed-off-by: Xenia Ragiadakou <burzalodowa@xxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
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