On Tue, Sep 16, 2025 at 05:58:56AM -0400, Dave Voutila wrote: > Eric Augé <[email protected]> writes: > > > Hello, > > > > Support has been added recently. > > > > I wonder how you determine support in your CPU, I have a laptop with a > > fairly recent AMD Ryzen CPU, I expected psp / SEV to be present / > > detected... > > > > -- > > cpu0: cpuid 1 > > edx=178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT> > > ecx=76f8320b<SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND> > > > > You left out what I'm pretty sure is the critical part here (pulled from > your attache dmesg): > > cpu0: cpuid 8000001F eax=1<SME> > > This should be reporting SEV and SEV-ES support, not SME. > > hshoexer@ or mlarkin@ can tell me if I'm wrong here. >
this is correct. this cpu does not support SEV/SEV-ES/etc. -ml > >...but : > >"AMD 19h/7xh PSP" rev 0x00 at pci5 dev 0 function 2 not configured > > > >so I suspect it's the reason why sev or seves are not supported in vmd > >conf on my machine. (attached dmesg) > > > > The reason is the cpu doesn't support SEV & SEV-ES per cpuid > 8000001F. > > I'm not an AMD expert, but I think PSP serves multiple purposes and > exists in more AMD cpus than support SEV/SEV-ES. It's confusing. > > AFAIK only Epyc-class AMDs and maybe some newer Ryzen Threadripper class > ship with it. I'm unaware of any portable devices with SEV...one of the > reasons I don't own any supported hardware. > > >Do I have to activate, sysctl or recompile the kernel with additional > >config options? > > No. Only config should be vmd-specific. > > -dv >
