Re: [PATCH v1] vfio/igd: Update igd-assign.txt for Intel MTL and newer platforms

["Cédric Le Goater" <clg@redhat.com>]

On 9/28/26 10:42, Yuan Wang wrote:
> Update the igd-assign.txt documentation to reflect the addition of
> the 0006 patch in the ECI repository. This patch is required to
> enable support for Meteor Lake (MTL) and subsequent Intel platforms.
> 
> Starting from MTL, the hardware-accessible BDSM (Base of Data Stolen
> Memory) register in the PCI configuration space has been removed.
> Instead, IGD devices now access stolen memory via MMIO BAR2 (LMEMBAR).
> Consequently, guest firmware no longer needs to program the legacy
> BDSM register.
> 
> Reviewed-by: Bosheng Xue <bosheng.xue@intel.com>

I don't remember seeing this review on the list.

> Signed-off-by: Yuan Wang <yuan1.wang@intel.com>
> ---
> Note:
> 
> We added a patch to the ECI website to skip the DSM zero-size check as
> the sixth patch. Accordingly, we updated igd-assign.txt to reflect this
> change.
> 
> Link:
> https://eci.intel.com/docs/3.3/components/kvm-hypervisor.html
> ---
>   docs/igd-assign.txt | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/docs/igd-assign.txt b/docs/igd-assign.txt
> index e54040335b..b9abfdbac3 100644
> --- a/docs/igd-assign.txt
> +++ b/docs/igd-assign.txt
> @@ -263,6 +263,6 @@ Footnotes
>   [2] # echo "vfio-pci" > /sys/bus/pci/devices/0000:00:02.0/driver_override
>   [3] https://web.archive.org/web/20240827012422/https://bugzilla.tianocore.org/show_bug.cgi?id=935
>       Tianocore bugzilla was down since Jan 2025 :(
> -[4] https://eci.intel.com/docs/3.3/components/kvm-hypervisor.html, Patch 0001-0004
> +[4] https://eci.intel.com/docs/3.3/components/kvm-hypervisor.html, Patch 0001-0004, 0006
>   [5] https://github.com/tomitamoeko/VfioIgdPkg
>   [6] https://winraid.level1techs.com/t/tool-guide-news-uefi-bios-updater-ubu/30357


Applied to

     https://github.com/legoater/qemu vfio-next

Thanks,

C.