tree 6c64c849aca3953ce1062a003b3e56c1259d421b
parent 623b681014db25b35ce02b5c8e2824c8901b23ef
author Fuad Tabba <tabba@google.com> 1567762932 +0100
committer Fuad Tabba <tabba@google.com> 1568132352 +0100

Add support for accessing EL1 debug registers

For now, the primary vm can access all debug registers, whereas secondary vms
cannot.  Debug event exceptions are disabled for secondary vms, so a malicious
primary cannot have active breakpoints or watchpoints for secondary vms.

This code allows us in the future to add debug support to secondary vms, and to
have fine-grained control over which registers are allowed, either by the
primary or secondary, as well as change the behavior for such accesses.

Bug: 132422368
Change-Id: I616454cc12bea6b8dfebbbdb566ac64c0a6625c2