On Fri, Jul 17, 2020 at 12:21 AM <ira.weiny@xxxxxxxxx> wrote: > > From: Ira Weiny <ira.weiny@xxxxxxxxx> > > The PKRS MSR is not managed by XSAVE. It is already preserved through a > context switch but this support leaves exception handling code open to > memory accesses which the interrupted process has allowed. > > Close this hole by preserve the current task's PKRS MSR, reset the PKRS > MSR value on exception entry, and then restore the state on exception > exit. Should this live in pt_regs? --Andy
