Messages in this thread | | | Subject | 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, 6 Oct 2021 16:39:21 -0500 |
| |
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&data=04%7C01%7CThomas.Lendacky%40amd.com%7C88c625e0b5684c2df98708d988f84d26%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637691422304849477%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=47jfRaCMn16Ii7xGLXQ31RRdr7Iz%2BG52zU7u%2B3YEM2g%3D&reserved=0
| |