Re: `AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT=y` causes AMDGPU to fail on Ryzen: amdgpu: SME is not compatible with RAVEN
From: Tom Lendacky
Date: Wed Oct 06 2021 - 17:39:29 EST
On 10/6/21 1:36 PM, Alex Deucher wrote:
On Wed, Oct 6, 2021 at 2:21 PM Borislav Petkov <bp@xxxxxxxxx> wrote:
On Wed, Oct 06, 2021 at 02:10:30PM -0400, Alex Deucher wrote:
From the x86 model and family info? I think Raven has different
families from other Zen based CPUs.
And even if we do, that's still not accurate enough - we wanna know
whether the IOMMU works.
Right.
So I guess we're all left to the user to decide. But I'm always open
to suggestions for solving things in sw and not requiring any user
interaction.
@Tom Lendacky Any ideas?
I think user decision is probably going to be best. We have to enable and
encrypt the kernel for SME very early in boot, that, short of
family/model/stepping checks, there's not a lot that we can do.
Thanks,
Tom
Alex
Other than these comments, looks fine to me.
Thx.
--
Regards/Gruss,
Boris.
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