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SubjectRe: `AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT=y` causes AMDGPU to fail on Ryzen: amdgpu: SME is not compatible with RAVEN
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On 10/6/21 1:36 PM, Alex Deucher wrote:
> On Wed, Oct 6, 2021 at 2:21 PM Borislav Petkov <bp@alien8.de> 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.
>>
>> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpeople.kernel.org%2Ftglx%2Fnotes-about-netiquette&amp;data=04%7C01%7CThomas.Lendacky%40amd.com%7C88c625e0b5684c2df98708d988f84d26%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637691422304849477%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=47jfRaCMn16Ii7xGLXQ31RRdr7Iz%2BG52zU7u%2B3YEM2g%3D&amp;reserved=0

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