On Thu, Jul 29, 2021 at 05:33:00PM +0000, Oliver Upton wrote: > Add a test case for counter emulation on arm64. A side effect of how KVM > handles physical counter offsetting on non-ECV systems is that the > virtual counter will always hit hardware and the physical could be > emulated. Force emulation by writing a nonzero offset to the physical > counter and compare the elapsed cycles to a direct read of the hardware > register. > > Cc: Andrew Jones <drjo...@redhat.com> > Reviewed-by: Ricardo Koller <ricar...@google.com> > Signed-off-by: Oliver Upton <oup...@google.com> > --- > tools/testing/selftests/kvm/.gitignore | 1 + > tools/testing/selftests/kvm/Makefile | 1 + > .../kvm/aarch64/counter_emulation_benchmark.c | 207 ++++++++++++++++++ > 3 files changed, 209 insertions(+) > create mode 100644 > tools/testing/selftests/kvm/aarch64/counter_emulation_benchmark.c >
Reviewed-by: Andrew Jones <drjo...@redhat.com> _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
