tree 1a7addbb3015674bffbde53ec6c64cf25396cd69
parent 21aecdbd7f3ab02c9b82597dc733ee759fb8b274
author Eric Auger <eric.auger@redhat.com> 1579875932 +0100
committer Marc Zyngier <maz@kernel.org> 1580215832 +0000

KVM: arm64: pmu: Don't increment SW_INCR if PMCR.E is unset

The specification says PMSWINC increments PMEVCNTR<n>_EL1 by 1
if PMEVCNTR<n>_EL0 is enabled and configured to count SW_INCR.

For PMEVCNTR<n>_EL0 to be enabled, we need both PMCNTENSET to
be set for the corresponding event counter but we also need
the PMCR.E bit to be set.

Fixes: 7a0adc7064b8 ("arm64: KVM: Add access handler for PMSWINC register")
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200124142535.29386-2-eric.auger@redhat.com