On 24/12/2019 10:18, Roger Pau Monne wrote: > On hardware without x2APIC support Xen emulated local APIC will > provide such mode, and hence the feature should be set in the maximum > HVM cpuid policy. > > Not exposing it in the maximum policy results in HVM domains not > getting such feature exposed unless it's also supported by the > underlying hardware. > > Signed-off-by: Roger Pau Monné <roger....@citrix.com>
x2apic has never been exposed via this mechanism, due to its effects on topology calculations. It has however always been down to the toolstack to opt in, and Xen permits this via recalculate_cpuid_policy(), on the expectation that the toolstack knew what it was doing WRT topology (all evidence actually to the contrary). If we're seeing a recent change in behaviour, then it will be from libxc. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
