Re: [Xen-devel] [PATCH v2] vlapic: fix two flaws in emulating MSR_IA32_APICBASE

2017-06-01 Thread Jan Beulich
>>> On 31.05.17 at 14:41, wrote: > According to SDM Chapter ADVANCED PROGRAMMABLE INTERRUPT CONTROLLER (APIC) > -> Extended XAPIC (x2APIC) -> x2APIC State Transitions, The existing code to > handle guest's writing MSR_IA32_APICBASE has two flaws: > 1. Transition from x2APIC Mode to Disabled Mode i

[Xen-devel] [PATCH v2] vlapic: fix two flaws in emulating MSR_IA32_APICBASE

2017-05-31 Thread Chao Gao
According to SDM Chapter ADVANCED PROGRAMMABLE INTERRUPT CONTROLLER (APIC) -> Extended XAPIC (x2APIC) -> x2APIC State Transitions, The existing code to handle guest's writing MSR_IA32_APICBASE has two flaws: 1. Transition from x2APIC Mode to Disabled Mode is allowed but wrongly disabled currently.