tree 9f6d5738021e9c70ceec1c35c7801763d262f2e5
parent 26291c54e111ff6ba87a164d85d4a4e134b7315c
author Adrian Hunter <adrian.hunter@intel.com> 1643613889 +0200
committer Peter Zijlstra <peterz@infradead.org> 1643803902 +0100

perf/x86/intel/pt: Relax address filter validation

The requirement for 64-bit address filters is that they are canonical
addresses. In other respects any address range is allowed which would
include user space addresses.

That can be useful for tracing virtual machine guests because address
filtering can be used to advantage in place of current privilege level
(CPL) filtering.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220131072453.2839535-2-adrian.hunter@intel.com