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xen-devel
RE: [Xen-devel] x2apic mode vs. interrupt remapping
According to the #Cset20168, x2apic is only enabled when all VT-d engines
support IR and EIM support, so the policy should be same with Linux's.
Xiantao
Jan Beulich wrote:
> Hi,
>
> while the Linux kernel enters x2apic mode only when it was able to
> initialize interrupt remapping (leaving aside a KVM special case), Xen
> treats the two features as independent ones. We're having a report
> where interrupt delivery doesn't work in x2apic mode (i.e. no-x2apic
> makes the system boot successfully), and hence I'm wondering why
> Xen would use this mode on a wider range of machines than Linux.
>
> Thanks, Jan
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
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