[PATCH v4 0/6] KVM: arm64: Enable ring-based dirty memory tracking

From: Gavin Shan <gshan@redhat.com>
To: kvmarm@lists.cs.columbia.edu
Cc: maz@kernel.org, shuah@kernel.org, kvm@vger.kernel.org,
	catalin.marinas@arm.com, andrew.jones@linux.dev,
	shan.gavin@gmail.com, bgardon@google.com, dmatlack@google.com,
	pbonzini@redhat.com, zhenyzha@redhat.com, will@kernel.org
Subject: [PATCH v4 0/6] KVM: arm64: Enable ring-based dirty memory tracking
Date: Tue, 27 Sep 2022 08:54:33 +0800	[thread overview]
Message-ID: <20220927005439.21130-1-gshan@redhat.com> (raw)

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").

This series is applied on top of Marc's v2 series [0], fixing dirty-ring
ordering issue.

[0] https://lore.kernel.org/kvmarm/20220926145120.27974-1-maz@kernel.org

v3: https://lore.kernel.org/r/20220922003214.276736-1-gshan@redhat.com
v2: https://lore.kernel.org/lkml/YyiV%2Fl7O23aw5aaO@xz-m1.local/T/
v1: https://lore.kernel.org/lkml/20220819005601.198436-1-gshan@redhat.com

Testing
=======
(1) kvm/selftests/dirty_log_test
(2) Live migration by QEMU

Changelog
=========
v4:
  * Commit log improvement                                     (Marc)
  * Add helper kvm_dirty_ring_check_request()                  (Marc)
  * Drop ifdef for kvm_cpu_dirty_log_size()                    (Marc)
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                         |  3 ++
 arch/x86/include/asm/kvm_host.h              |  2 -
 arch/x86/kvm/x86.c                           | 15 +++---
 include/linux/kvm_dirty_ring.h               | 14 +++---
 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                        | 19 ++++++-
 11 files changed, 79 insertions(+), 34 deletions(-)

-- 
2.23.0

_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm