i386: Make sure TSC frequency is preserved across migration when Hyper-V reenlightenment is in use

[PATCH 0/3] i386: Make sure TSC frequency is preserved across migration when Hyper-V reenlightenment is in use

Vitaly Kuznetsov posted 3 patches 4 years, 8 months ago

Download series mbox

Test checkpatch passed

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20210318160249.1084178-1-vkuznets@redhat.com

Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <ehabkost@redhat.com>

target/i386/kvm/hyperv.h |  1 +
target/i386/kvm/kvm.c    | 11 ++++++++++
target/i386/machine.c    | 45 ++++++++++++++++++++++++++++++++++++++--
3 files changed, 55 insertions(+), 2 deletions(-)

Expand all Fold all

[PATCH 0/3] i386: Make sure TSC frequency is preserved across migration when Hyper-V reenlightenment is in use

Posted by Vitaly Kuznetsov 4 years, 8 months ago

KVM doesn't fully support Hyper-V reenlightenment notifications on
migration. In particular, it doesn't support emulating TSC frequency
of the source host by trapping all TSC accesses so unless TSC scaling
is supported on the destination host and KVM_SET_TSC_KHZ succeeded, it
is unsafe to proceed with migration.

Vitaly Kuznetsov (3):
  i386: Make Hyper-V related sections KVM only
  i386: Fix 'hypercall_hypercall' typo
  i386: Make sure kvm_arch_set_tsc_khz() succeeds on migration when
    'hv-reenlightenment' was exposed

 target/i386/kvm/hyperv.h |  1 +
 target/i386/kvm/kvm.c    | 11 ++++++++++
 target/i386/machine.c    | 45 ++++++++++++++++++++++++++++++++++++++--
 3 files changed, 55 insertions(+), 2 deletions(-)

-- 
2.30.2