Re: [PATCH kernel v3 3/4] iommu/amd: Report SEV-TIO support
From: Vasant Hegde
Date: Mon Dec 01 2025 - 23:58:05 EST
On 12/2/2025 8:14 AM, Alexey Kardashevskiy wrote:
> The SEV-TIO switch in the AMD BIOS is reported to the OS via
> the IOMMU Extended Feature 2 register (EFR2), bit 1.
>
> Add helper to parse the bit and report the feature presence.
>
> Signed-off-by: Alexey Kardashevskiy <aik@xxxxxxx>
> Acked-by: Joerg Roedel <joerg.roedel@xxxxxxx>
> Link: https://patch.msgid.link/20251121080629.444992-4-aik@xxxxxxx
> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Reviewed-by: Vasant Hegde <vasant.hegde@xxxxxxx>
-Vasant