On Thu, 2021-08-19 at 15:48 +0300, Jarkko Sakkinen wrote: > The amount of SGX memory on the system is determined by the BIOS and it > varies wildly between systems. It can be from dozens of MB's on desktops > or VM's, up to many GB's on servers. Just like for regular memory, it is > sometimes useful to know the amount of usable SGX memory in the system. > > Add SGX_MemTotal field to /proc/meminfo, which shows the total amount of > usable SGX memory in the system. E.g. with 32 MB reserved for SGX from > BIOS, the printout would be: > > SGX_MemTotal: 22528 kB > > It is less than 32 MB because some of the space is reserved for Enclave > Page Cache Metadata (EPCM), which contains state variables for all the > pages in the Enclave Page Cache (EPC). The latter contains the pages, > which applications can use to create enclaves. > > Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx> While working on this, I noticed that suddenly my i5-9660k desktop fully supports SGX on Linux. I don't recall that it has worked in the patch. Maybe this is because of some firmware/ucode update, do not really know, but definitely not a bad thing. Perhaps this casts through other 9th gen Core CPU's. The motherboard I have in this machine is AORUS Elite z390. /Jarkko
