[Feature] VT-d posted interrupts

[Yingying Zhao]

Posted Interrupts on Broadwell is really VT-d posted interrupts. Posted Interrupts for the processor are part of the APIC-V and was introduced in IVT. The idea is that the interrupt can be placed in a data structure for the guest and the guest can, under the right conditions, receive the interrupt without VM exiting. Chapter 29 of vol. c of the SDM has the currently public part of posted interrupts.

Upstream Schedule:
kernel: 4.4
Xen: 4.7

Target Ubuntu Release:
Ubuntu 16.04

[Yingying Zhao (yingying-zhao)]

The KVM target will be kernel 3.19 depending on Broadwell Server hardware availability.

[Leann Ogasawara (leannogasawara)]

Ok, sounds like this should retarget to the 15.04 Ubuntu release then. Thanks.

[Yingying Zhao (yingying-zhao)]

Yes. Please retarget to 15.04 release.

[Yingying Zhao (yingying-zhao)]

Latest upstream schedule update:
KVM: 3.20
Xen: 4.6

[Leann Ogasawara (leannogasawara)]

Per discussion between Canonical and Intel, retarget to 15.10.

[Leann Ogasawara (leannogasawara)]

With the kernel target of 4.3 and xen target of 4.6, shall we retarget this to 16.04?

[XiongZhang (xiong-y-zhang)]

it hasn't finished in upstream, so move it to 16.04

[XiongZhang (xiong-y-zhang)]

it has been merged into 4.4 kernel.
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[XiongZhang (xiong-y-zhang)]

For Xen, it is implemented in xen 4.7. Please update Xen in 16.10 to 4.7