On Thu, Aug 25, 2016 at 03:09:27PM +0800, Shannon Zhao wrote: > Hi guys, > > Looking at the codes, for pc-2.4 machine it enables host-cache-info for > guest so guest can get the L3 cache info of host. But since QEMU has its > own rule to generate ACPI ID, guest will not use the L3 cache correctly. > > I also notice that QEMU present L1 and L2 cache for guest via its own > rule, why it not present L3 cache info which is consistent with the ACPI > ID? Are there any downsides?
host-cache-info is there only for compatibility with old behavior of "-cpu host", but I wouldn't advise anyone to use it. We would need a proper way to configure cache information exposed to the guest (including both CPUID and anything that would be exposed through ACPI), but we don't have one yet. -- Eduardo
