RE: [PATCH] x86/mm: Print the encryption features correctly when a paravisor is present

[Dexuan Cui]

> From: Dave Hansen <dave.hansen@xxxxxxxxx>
> Sent: Friday, October 20, 2023 1:14 PM
> To: Dexuan Cui <decui@xxxxxxxxxxxxx>; KY Srinivasan
> [...]
> On 10/20/23 13:00, Dexuan Cui wrote:
> >> OK, then what good is this patch in the first place?  If you are right,
> >> then this would give equivalent information:
> >>
> >> cat /proc/cpuinfo | grep -q Intel && echo 'TDX'
> >> cat /proc/cpuinfo | grep -q AMD   && echo 'SEV'
> >>
> >> No kernel patching needed, right?
> > Currently arch/x86/mm/mem_encrypt.c:
> print_mem_encrypt_feature_info()
> > prints an incorrect and confusing message
> > "Memory Encryption Features active: AMD SEV".
> > when an Intel TDX VM with a paravisor runs on Hyper-V.
> >
> > So I think a kernel patch is needed.
> 
> How about either removing the message entirely or removing the ": AMD
> SEV" part?

It looks good to me if we can update/remove the message in
print_mem_encrypt_feature_info(), but I guess AMD folks might want to
keep the ": AMD SEV" part?