On Tue, Dec 20, 2022 at 10:55:44AM +0100, Borislav Petkov wrote: > 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. That's right, CONFIG_RESTRICTEDMEM is always selected for supported KVM architectures (currently x86_64). > > > 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". :-\ Yes I agree. One way to remove this is probably additionally checking CONFIG_64BIT instead. Thanks, Chao > > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette
