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| author | Andrew Murray | 2019-04-09 21:22:14 +0200 |
|---|---|---|
| committer | Marc Zyngier | 2019-04-24 16:36:22 +0200 |
| commit | 3d91befbb3a0fcec6e1eebde45c8074b88cc9441 (patch) | |
| tree | dc87926a4232a95959cc882fb6c9bed5be26a9dd /virt | |
| parent | arm64: arm_pmu: Add !VHE support for exclude_host/exclude_guest attributes (diff) | |
| download | kernel-qcow2-linux-3d91befbb3a0fcec6e1eebde45c8074b88cc9441.tar.gz kernel-qcow2-linux-3d91befbb3a0fcec6e1eebde45c8074b88cc9441.tar.xz kernel-qcow2-linux-3d91befbb3a0fcec6e1eebde45c8074b88cc9441.zip | |
arm64: KVM: Enable !VHE support for :G/:H perf event modifiers
Enable/disable event counters as appropriate when entering and exiting
the guest to enable support for guest or host only event counting.
For both VHE and non-VHE we switch the counters between host/guest at
EL2.
The PMU may be on when we change which counters are enabled however
we avoid adding an isb as we instead rely on existing context
synchronisation events: the eret to enter the guest (__guest_enter)
and eret in kvm_call_hyp for __kvm_vcpu_run_nvhe on returning.
Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt')
0 files changed, 0 insertions, 0 deletions