Changes since v1:
- Fix the issue by casting 'hv_clock->system_time' to s64 in
compute_tsc_page_parameters() instead of clamping its value to zero in
kvm_guest_time_update() [Paolo]
Original description:
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: Properly divide maybe-negative
'hv_clock->system_time' in compute_tsc_page_parameters()
selftests: kvm: Check that TSC page value is small after
KVM_SET_CLOCK(0)
arch/x86/kvm/hyperv.c | 9 ++++++---
tools/testing/selftests/kvm/x86_64/hyperv_clock.c | 13 +++++++++++--
2 files changed, 17 insertions(+), 5 deletions(-)
--
2.30.2
