linux-kernel - [RFC PATCH 0/2] KVM: arm64: Host/Guest trace syncronization

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Date:   Fri, 19 Nov 2021 11:21:16 +0100
From:   Nicolas Saenz Julienne <nsaenzju@...hat.com>
To:     linux-arm-kernel@...ts.infradead.org, maz@...nel.org,
        rostedt@...dmis.org
Cc:     james.morse@....com, alexandru.elisei@....com,
        suzuki.poulose@....com, catalin.marinas@....com, will@...nel.org,
        nsaenzju@...hat.com, linux-kernel@...r.kernel.org,
        kvmarm@...ts.cs.columbia.edu, mingo@...hat.com,
        mtosatti@...hat.com, nilal@...hat.com
Subject: [RFC PATCH 0/2] KVM: arm64: Host/Guest trace syncronization

This small series introduces the necessary infrastructure to be able to
syncronize host and guest traces. The approach I'm following is a bit
biased since I tried to replicate the methods I've been using in the
past with x86.

This was tested on an Ampere Mt. Jade based machine.

---

Nicolas Saenz Julienne (2):
  arm64/tracing: add cntvct based trace clock
  KVM: arm64: export cntvoff in debugfs

 arch/arm64/include/asm/kvm_host.h    |  1 +
 arch/arm64/include/asm/trace_clock.h | 12 ++++++++++++
 arch/arm64/kernel/Makefile           |  2 +-
 arch/arm64/kernel/trace_clock.c      | 12 ++++++++++++
 arch/arm64/kvm/Makefile              |  2 +-
 arch/arm64/kvm/arch_timer.c          |  2 +-
 arch/arm64/kvm/debugfs.c             | 25 +++++++++++++++++++++++++
 include/kvm/arm_arch_timer.h         |  3 +++
 8 files changed, 56 insertions(+), 3 deletions(-)
 create mode 100644 arch/arm64/include/asm/trace_clock.h
 create mode 100644 arch/arm64/kernel/trace_clock.c
 create mode 100644 arch/arm64/kvm/debugfs.c

-- 
2.33.1