On Thu, 2024-03-21 at 09:37 -0700, Reinette Chatre wrote: > From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx> > > Remove APIC_BUS_FREQUENCY and calculate it based on nanoseconds per APIC > bus cycle. APIC_BUS_FREQUENCY is used only for HV_X64_MSR_APIC_FREQUENCY. > The MSR is not frequently read, calculate it every time. > > There are two constants related to the APIC bus frequency: > APIC_BUS_FREQUENCY and APIC_BUS_CYCLE_NS. > Only one value is required because one can be calculated from the other: > APIC_BUS_CYCLES_NS = 1000 * 1000 * 1000 / APIC_BUS_FREQUENCY. > > Remove APIC_BUS_FREQUENCY and instead calculate it when needed. > This prepares for support of configurable APIC bus frequency by > requiring to change only a single variable. > > Suggested-by: Maxim Levitsky <maximlevitsky@xxxxxxxxx> > Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx> > Reviewed-by: Maxim Levitsky <maximlevitsky@xxxxxxxxx> > Reviewed-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx> > [reinette: rework changelog] > Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx> Reviewed-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
