You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
KVM: arm64: nv: Apply EL2 event filtering when in hyp context
It hopefully comes as no surprise when I say that vEL2 actually runs at
EL1. So, the guest hypervisor's EL2 event filter (NSH) needs to actually
be applied to EL1 in the perf event. In addition to this, the disable
bit for the guest counter range (HPMD) needs to have the effect of
stopping the affected counters.
Do exactly that by stuffing ::exclude_kernel with the combined effect of
these controls. This isn't quite enough yet, as the backing perf events
need to be reprogrammed upon nested ERET/exception entry to remap the
effective filter onto ::exclude_kernel.
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20241025182354.3364124-18-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
0 commit comments