On March 2, 2021 5:02:13 PM GMT+01:00, Sean Christopherson <seanjc@xxxxxxxxxx> wrote: >The KVM use case is to query /proc/cpuinfo to see if sgx2 can be >enabled in a >guest. You mean before the guest ia created? I sure hope there's a better way to query HV-supported features than grepping /proc/cpuinfo... >The counter-argument to that is we might want sgx2 in /proc/cpuinfo to >mean sgx2 >is enabled in hardware _and_ supported by the kernel. Userspace can >grep for >sgx in /proc/cpuinfo, and use cpuid to discover sgx2, so it's not a >blocker. Question is, what exactly that flag should denote: that EDMM is supported in the HV and guests can do the dynamic thing of adding/rwmoving EPC pages? Is that the only feature behind SGX2? >That being said, adding some form of capability/versioning to SGX seems >inevitable, not sure it's worth witholding sgx2 from /proc/cpuinfo. See what I typed earlier - no objections from me if a proper use case is identified and written down. Thx. -- Sent from a small device: formatting sux and brevity is inevitable.
