RE: [PATCH 1/1] iommu/vt-d: Downgrade warning for pre-enabled IR

[Tian, Kevin]

> From: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Sent: Tuesday, June 25, 2024 12:39 PM
> 
> Emitting a warning is overkill in intel_setup_irq_remapping() since the
> interrupt remapping is pre-enabled. For example, there's no guarantee
> that kexec will explicitly disable interrupt remapping before booting a
> new kernel. As a result, users are seeing warning messages like below
> when they kexec boot a kernel, though there is nothing wrong:
> 
>  DMAR-IR: IRQ remapping was enabled on dmar18 but we are not in kdump
> mode
>  DMAR-IR: IRQ remapping was enabled on dmar17 but we are not in kdump
> mode
>  DMAR-IR: IRQ remapping was enabled on dmar16 but we are not in kdump
> mode
>  ... ...
> 
> Downgrade the severity of this message to avoid user confusion.
> 
> CC: Paul Menzel <pmenzel@xxxxxxxxxxxxx>
> Link: https://lore.kernel.org/linux-iommu/5517f76a-94ad-452c-bae6-
> 34ecc0ec4831@xxxxxxxxxxxxx/
> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>