Roger Pau Monne <roger....@citrix.com> writes: > And instead use NOW which is based on the TSC. This was already used > when running in shim mode, since there's likely no PIT in that > environment. > > Remove printing the CPU frequency, since it's already printed earlier > at boot, and getting the CPU frequency against the TSC without any > external reference timer is pointless. > > The motivation behind this change is to allow Xen to boot on HyperV > gen2 instances, which lack a PIT.
When on Hyper-V, LAPIC frequency can easily be queried from HV_X64_MSR_APIC_FREQUENCY (and that's what Linux does nowdays). This, of course, only if Hyper-V provides the interface but it always does. -- Vitaly _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
