On Mon, 2021-08-23 at 08:15 -0700, Dave Hansen wrote: > On 8/18/21 6:25 AM, 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 > > The big question here: Do we want to put purely architecture-specific > entries in (the currently quite arch-independent) /proc/meminfo? > > The current "DirectMap4k/2M/1G" entries from arch_report_meminfo() are > arch-specific in their sizes, of course, but the concept is at least > quite arch-independent. I started with /proc/meminfo instead of /sys/devices/system/node/*/meminfo because there is pre-existing arch callback, and secondary because it's also better fit for my kselftest code. The same discussion still applies to both files, they probably should follow a matching pattern. /Jarkko
