CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2026/02/08 03:03:13
Modified files:
sys/arch/amd64/amd64: vmm_machdep.c
Log message:
vmm: Expose pvclock only if tsc frequency is known
If the tsc frequency is unknown, tsc_frequency == 0 and vmm will set
vc_pvclock_system_tsc_mul = 0 which will cause the guest's pvclock to
not advance until vmm updates the struct pvclock_time_info on the next
vmentry. tsc_frequency == 0 can happen in nested virtualization
setups.
Therefore, do not expose the pvclock feature bits if tsc_frequency == 0,
both in the KVM and in the VMM hypervisor signature.
ok mlarkin
