I discovered that after KVM_SET_CLOCK(0) TSC page value in the guest can
go through the roof and apparently we have a signedness issue when the
update is performed. Fix the issue and add a selftest.
Vitaly Kuznetsov (2):
KVM: x86: hyper-v: Forbid unsigned hv_clock->system_time to go
negative after KVM_REQ_CLOCK_UPDATE
selftests: kvm: Check that TSC page value is small after
KVM_SET_CLOCK(0)
arch/x86/kvm/x86.c | 10 +++++++++-
tools/testing/selftests/kvm/x86_64/hyperv_clock.c | 13 +++++++++++--
2 files changed, 20 insertions(+), 3 deletions(-)
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2.30.2
