Re: [PATCH v10 3/9] KVM: Extend the memslot to support fd-based private memory

Borislav Petkov
2022-12-20T09:58:29Z

On Tue, Dec 20, 2022 at 03:43:18PM +0800, Chao Peng wrote:
> RESTRICTEDMEM is needed by TDX_HOST, not TDX_GUEST.

Which basically means that RESTRICTEDMEM should simply depend on KVM.
Because you can't know upfront whether KVM will run a TDX guest or a SNP
guest and so on.

Which then means that RESTRICTEDMEM will practically end up always
enabled in KVM HV configs.

> The only reason to add another HAVE_KVM_RESTRICTED_MEM is some code only
> works for 64bit[*] and CONFIG_RESTRICTEDMEM is not sufficient to enforce
> that.

This is what I mean with "we have too many Kconfig items". :-\

--
Regards/Gruss,
Boris.