On 12/05/2017 05:53 PM, David Hildenbrand wrote: > On 05.12.2017 09:33, Christian Borntraeger wrote: >> From: Janosch Frank <frankja@xxxxxxxxxxxxxxxxxx> >> >> All skey functions call skey_check_enable at their start, which checks >> if we are in the PSTATE and injects a privileged operation exception >> if we are. > > Correct thing to do, are we sure we even get an intercept? > (no documentation at hand :( ) If we run keyless we certainly get intercepts. The good thing is that Linux hosts do not use the keys and run with PSW key 0, so this does not open any protection issue for those. If we run with keys enabled, we might also get exits if the host holds the pgste lock for too long. -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
