Re: [PATCH 1/4] x86/sgx: Add sgx_nr_all_pages to the debugfs

Dave Hansen
2021-07-06T14:56:51Z

On 7/5/21 7:36 AM, Jarkko Sakkinen wrote:
> Create /sys/kernel/debug/x86/sgx_nr_all_pages, which reports total
> number of EPC pages available in the system.
Could we flesh this out a bit, please?

What's the value here when userspace could just re-enumerate the EPC
size from CPUID?

I'd really appreciate if we could draw parallels between these additions
to the "SGX VM" and their analogs in the "core VM". In this case, I
think the closest analog is probably "MemTotal" in /proc/meminfo.

Second, how is this going to be used?

Third, is this going to be the ABI forever?