Re: [Xen-devel] [PATCH v3 07/28] xen/x86: Annotate special features

2016-03-20 Thread Konrad Rzeszutek Wilk
On Tue, Mar 15, 2016 at 03:35:03PM +, Andrew Cooper wrote: > Some bits in a featureset are not simple a indication of new functionality, > and require special handling. > > APIC, OSXSAVE and OSPKE are fast-forwards of other pieces of state; > IA32_APIC_BASE.EN, CR4.OSXSAVE and CR4.OSPKE. Xen

Re: [Xen-devel] [PATCH v3 07/28] xen/x86: Annotate special features

2016-03-19 Thread Jan Beulich
>>> On 15.03.16 at 16:35, wrote: > Some bits in a featureset are not simple a indication of new functionality, > and require special handling. > > APIC, OSXSAVE and OSPKE are fast-forwards of other pieces of state; > IA32_APIC_BASE.EN, CR4.OSXSAVE and CR4.OSPKE. Xen

[Xen-devel] [PATCH v3 07/28] xen/x86: Annotate special features

2016-03-15 Thread Andrew Cooper
Some bits in a featureset are not simple a indication of new functionality, and require special handling. APIC, OSXSAVE and OSPKE are fast-forwards of other pieces of state; IA32_APIC_BASE.EN, CR4.OSXSAVE and CR4.OSPKE. Xen will take care of filling these appropriately at runtime. FDP_EXCP_ONLY