`AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT=y` causes AMDGPU to fail on Ryzen: amdgpu: SME is not compatible with RAVEN

[Borislav Petkov]

On Mon, Oct 11, 2021 at 03:05:33PM +0200, Paul Menzel wrote:
> I think, the IOMMU is enabled on the MSI B350M MORTAR, but otherwise, yes
> this looks fine. The help text could also be updated to mention problems
> with AMD Raven devices.

This is not only about Raven GPUs but, as Alex explained, pretty much
about every device which doesn't support a 48 bit DMA mask. I'll expand
that aspect in the changelog.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette