[Q:linux][PATCH 0/8] Support TDX host in questing

[Thibault Ferrante]

On 03/09/2025 14:53, Hector Cao wrote:
>      > Can you elaborate this limitation a little bit more please ? I m not sure to fully get the point
>     Once TDX is fully enabled (all conditions) on SPR(Saphire Rapids) and EMR(Emerald Rapids), you can't use kexec anymore.
>     kexec will fail to be prepared and will show this warning:
>     `Not allowed on platform with tdx_pw_mce bug`
> 
> 
> Ok thanks, I see
> This limitation only affects 2 CPU generations (SPR and EMR), on newer CPUs that support TDX (like GNR, SRF)
> we do not have this limitation.
> 
> Is my understanding correct?

Exactly.
SPR and EMR are the only CPU generations affected by this partial write erratum.
You can find more information about that erratum in this previous upstream submission [0].

0 : https://lore.kernel.org/all/86f2a8814240f4bbe850f6a09fc9d0b934979d1b.1685887183.git.kai.huang@intel.com/