Re: [PATCH] powerpc/pseries: export LPAR security flavor in lparcfg

Laurent Dufour [off-list ref] writes:

This is helpful to read the security flavor from inside the LPAR.

We already have /sys/kernel/debug/powerpc/security_features.

Is that not sufficient?

Export it like this in /proc/powerpc/lparcfg:

$ grep security_flavor /proc/powerpc/lparcfg
security_flavor=1

Value means:
0 Speculative execution fully enabled
1 Speculative execution controls to mitigate user-to-kernel attacks
2 Speculative execution controls to mitigate user-to-kernel and
  user-to-user side-channel attacks

Those strings come from the FSP help, but we have no guarantee it won't
mean something different in future.

cheers