diff options
| author | Reiji Watanabe <reijiw@google.com> | 2023-08-19 07:39:47 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-08-20 11:42:16 +0300 |
| commit | 64b81000b60b70f10a5834023fe100902d9f7a57 (patch) | |
| tree | 79e9e2fb1f5fc3cb7aff25f1ab9546178297b45a /arch/arm64/kvm | |
| parent | 8c694f557fd80ca9815ddb1cf5de10d8bf168110 (diff) | |
| download | linux-64b81000b60b70f10a5834023fe100902d9f7a57.tar.xz | |
KVM: arm64: PMU: Don't advertise STALL_SLOT_{FRONTEND,BACKEND}
Don't advertise STALL_SLOT_{FRONT,BACK}END events to the guest,
similar to STALL_SLOT event, as when any of these three events
are implemented, all three of them should be implemented,
according to the Arm ARM.
Suggested-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230819043947.4100985-5-reijiw@google.com
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/pmu-emul.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/arm64/kvm/pmu-emul.c b/arch/arm64/kvm/pmu-emul.c index b9633deff32a..6b066e04dc5d 100644 --- a/arch/arm64/kvm/pmu-emul.c +++ b/arch/arm64/kvm/pmu-emul.c @@ -758,10 +758,12 @@ u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1) } else { val = read_sysreg(pmceid1_el0); /* - * Don't advertise STALL_SLOT, as PMMIR_EL0 is handled + * Don't advertise STALL_SLOT*, as PMMIR_EL0 is handled * as RAZ */ - val &= ~BIT_ULL(ARMV8_PMUV3_PERFCTR_STALL_SLOT - 32); + val &= ~(BIT_ULL(ARMV8_PMUV3_PERFCTR_STALL_SLOT - 32) | + BIT_ULL(ARMV8_PMUV3_PERFCTR_STALL_SLOT_FRONTEND - 32) | + BIT_ULL(ARMV8_PMUV3_PERFCTR_STALL_SLOT_BACKEND - 32)); base = 32; } |