From: Andrew Jones <drjones@redhat.com>
To: Oliver Upton <oupton@google.com>
Cc: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Marc Zyngier <maz@kernel.org>, Peter Shier <pshier@google.com>,
Jim Mattson <jmattson@google.com>,
David Matlack <dmatlack@google.com>,
Ricardo Koller <ricarkol@google.com>,
Jing Zhang <jingzhangos@google.com>,
Raghavendra Rao Anata <rananta@google.com>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v5 13/13] selftests: KVM: Add counter emulation benchmark
Date: Thu, 29 Jul 2021 19:45:16 +0200 [thread overview]
Message-ID: <20210729174516.nje54y7c5iy5qyn4@gator> (raw)
In-Reply-To: <20210729173300.181775-14-oupton@google.com>
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 <drjones@redhat.com>
> Reviewed-by: Ricardo Koller <ricarkol@google.com>
> Signed-off-by: Oliver Upton <oupton@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 <drjones@redhat.com>
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prev parent reply other threads:[~2021-07-29 17:54 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-29 17:32 [PATCH v5 00/13] KVM: Add idempotent controls for migrating system counter state Oliver Upton
2021-07-29 17:32 ` [PATCH v5 01/13] KVM: x86: Report host tsc and realtime values in KVM_GET_CLOCK Oliver Upton
2021-07-30 17:48 ` Sean Christopherson
2021-07-30 18:24 ` Oliver Upton
2021-07-29 17:32 ` [PATCH v5 02/13] KVM: x86: Refactor tsc synchronization code Oliver Upton
2021-07-30 18:08 ` Sean Christopherson
2021-08-03 21:18 ` Oliver Upton
2021-07-29 17:32 ` [PATCH v5 03/13] KVM: x86: Expose TSC offset controls to userspace Oliver Upton
2021-07-30 18:34 ` Sean Christopherson
2021-07-29 17:32 ` [PATCH v5 04/13] tools: arch: x86: pull in pvclock headers Oliver Upton
2021-07-29 17:32 ` [PATCH v5 05/13] selftests: KVM: Add test for KVM_{GET,SET}_CLOCK Oliver Upton
2021-07-29 17:32 ` [PATCH v5 06/13] selftests: KVM: Fix kvm device helper ioctl assertions Oliver Upton
2021-07-29 17:32 ` [PATCH v5 07/13] selftests: KVM: Add helpers for vCPU device attributes Oliver Upton
2021-07-29 17:32 ` [PATCH v5 08/13] selftests: KVM: Introduce system counter offset test Oliver Upton
2021-07-29 17:32 ` [PATCH v5 09/13] KVM: arm64: Allow userspace to configure a vCPU's virtual offset Oliver Upton
2021-07-30 10:12 ` Marc Zyngier
2021-08-02 23:27 ` Oliver Upton
2021-07-29 17:32 ` [PATCH v5 10/13] selftests: KVM: Add support for aarch64 to system_counter_offset_test Oliver Upton
2021-07-29 17:32 ` [PATCH v5 11/13] KVM: arm64: Provide userspace access to the physical counter offset Oliver Upton
2021-07-30 11:08 ` Marc Zyngier
2021-07-30 15:22 ` Oliver Upton
2021-07-30 16:17 ` Marc Zyngier
2021-07-30 16:48 ` Oliver Upton
2021-08-04 6:59 ` Oliver Upton
2021-07-29 17:32 ` [PATCH v5 12/13] selftests: KVM: Test physical counter offsetting Oliver Upton
2021-07-29 17:33 ` [PATCH v5 13/13] selftests: KVM: Add counter emulation benchmark Oliver Upton
2021-07-29 17:45 ` Andrew Jones [this message]
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