[PATCH v1 0/5] KVM: arm64: Enable ring-based dirty memory tracking

Gavin Shan
2022-08-19T00:56:54Z

This series enables the ring-based dirty memory tracking for ARM64.
The feature has been available and enabled on x86 for a while. It
is beneficial when the number of dirty pages is small in a checkpointing
system or live migration scenario. More details can be found from
fb04a1eddb1a ("KVM: X86: Implement ring-based dirty memory tracking").

The generic part has been comprehensive enough, meaning there isn't too
much work, needed to extend it to ARM64.

- PATCH[1] enables the feature on ARM64
- PATCH[2-5] improves kvm/selftests/dirty_log_test

Testing
=======

- kvm/selftests/dirty_log_test
- Live migration by QEMU
- Host with 4KB or 64KB base page size

Gavin Shan (5):
KVM: arm64: Enable ring-based dirty memory tracking
KVM: selftests: Use host page size to map ring buffer in
dirty_log_test
KVM: selftests: Dirty host pages in dirty_log_test
KVM: selftests: Clear dirty ring states between two modes in
dirty_log_test
KVM: selftests: Automate choosing dirty ring size in dirty_log_test

Documentation/virt/kvm/api.rst | 2 +-
arch/arm64/include/uapi/asm/kvm.h | 1 +
arch/arm64/kvm/Kconfig | 1 +
arch/arm64/kvm/arm.c | 8 ++
tools/testing/selftests/kvm/dirty_log_test.c | 101 ++++++++++++++-----
tools/testing/selftests/kvm/lib/kvm_util.c | 2 +-
6 files changed, 88 insertions(+), 27 deletions(-)

--
2.23.0