[RFC,0/2] KVM: arm64: Host/Guest trace syncronization

Message

Nicolas Saenz Julienne Nov. 19, 2021, 10:21 a.m. UTC

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.

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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