Re: [PATCH v2] crypto: ccp: Add a quirk to firmware update

[Tom Lendacky]

On 8/9/22 17:49, Jarkko Sakkinen wrote:
> From: Jarkko Sakkinen <jarkko@xxxxxxxxxxx>
>
> A quirk for fixing the committed TCB version, when upgrading from a
> firmware version earlier than 1.50. This is a known issue, and the
> documented workaround is to load the firmware twice.
>
> Currently, this issue requires the  following workaround:
>
> sudo modprobe -r kvm_amd
> sudo modprobe -r ccp
> sudo modprobe ccp
> sudo modprobe kvm_amd
>
> Implement this workaround inside kernel by checking whether the API
> version is less than 1.50, and if so, download the firmware twice.
> This addresses the TCB version issue.
>
> Link: https://lore.kernel.org/all/de02389f-249d-f565-1136-4af3655fab2a@xxxxxxxxxxx/
> Reported-by: Harald Hoyer <harald@xxxxxxxxxxx>
> Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxxx>

Acked-by: Tom Lendacky <thomas.lendacky@xxxxxxx>