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, meaning there isn't too much work, needed to extend it to ARM64. PATCH[1] introduces KVM_REQ_RING_SOFT_FULL for x86 PATCH[2] moves declaration of kvm_cpu_dirty_log_size() PATCH[3] enables the feature on ARM64 PATCH[4-6] improves kvm/selftests/dirty_log_test v2: https://lore.kernel.org/lkml/YyiV%2Fl7O23aw5aaO@xz-m1.local/T/ v1: https://lore.kernel.org/lkml/20220819005601.198436-1-gs...@redhat.com Testing ======= (1) kvm/selftests/dirty_log_test (2) Live migration by QEMU Changelog ========= v3: * Check KVM_REQ_RING_SOFT_RULL inside kvm_request_pending() (Peter) * Move declaration of kvm_cpu_dirty_log_size() (test-robot) v2: * Introduce KVM_REQ_RING_SOFT_FULL (Marc) * Changelog improvement (Marc) * Fix dirty_log_test without knowing host page size (Drew) Gavin Shan (6): KVM: x86: Introduce KVM_REQ_RING_SOFT_FULL KVM: x86: Move declaration of kvm_cpu_dirty_log_size() to kvm_dirty_ring.h KVM: arm64: Enable ring-based dirty memory tracking KVM: selftests: Use host page size to map ring buffer 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 +++ arch/x86/include/asm/kvm_host.h | 2 - arch/x86/kvm/mmu/mmu.c | 2 + arch/x86/kvm/x86.c | 19 +++---- include/linux/kvm_dirty_ring.h | 1 + include/linux/kvm_host.h | 1 + tools/testing/selftests/kvm/dirty_log_test.c | 53 ++++++++++++++------ tools/testing/selftests/kvm/lib/kvm_util.c | 2 +- virt/kvm/dirty_ring.c | 4 ++ 12 files changed, 69 insertions(+), 27 deletions(-) -- 2.23.0 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
