Clarifying PVH mode requirements

[PGNet Dev <pgnet.dev@gmail.com>]

I run Xen 4.6 Dom0

	rpm -qa | egrep -i "kernel-default-4|xen-4"
		kernel-default-devel-4.4.0-8.1.g9f68b90.x86_64
		xen-4.6.0_08-405.1.x86_64

My guests are currently HVM in PVHVM mode; I'm exploring PVH.

IIUC, for 4.6, this doc

	http://xenbits.xen.org/docs/4.6-testing/misc/pvh-readme.txt

instructs the following necessary changes:

@ GRUBG cfg

-	GRUB_CMDLINE_XEN=" ..."
+	GRUB_CMDLINE_XEN=" dom0pvh ..."

&, @ guest.cfg

+	pvh = 1

For my guest.cfg, currently in PVHVM mode, I have

	builder = 'hvm'
	xen_platform_pci = 1
	device_model_version="qemu-xen"
	hap = 1
	...

Q:
	Do any of these^^ params need to also change with the addition of

	pvh = 1


> At the moment HAP is required for PVH.

As above, I've 'hap = 1' enabled.

But checking cpu,

	hwinfo --cpu | egrep "Arch|Model"
	  Arch: X86-64
	  Model: 6.60.3 "Intel(R) Xeon(R) CPU E3-1220 v3 @ 3.10GHz"

neither 'hap' nor 'emt' are specifically called out,

	egrep -wo 'vmx|lm|aes' /proc/cpuinfo  | sort | uniq \
	 | sed -e 's/aes/Hardware encryption=Yes (&)/g' \
	 -e 's/lm/64 bit cpu=Yes (&)/g' -e 's/vmx/Intel hardware 
virtualization=Yes (&)/g'

		Hardware encryption=Yes (aes)
		64 bit cpu=Yes (lm)
	egrep -wo 'hap|vmx|ept|vpid|npt|tpr_shadow|flexpriority|vnmi|lm|aes' 
/proc/cpuinfo  | sort | uniq
		aes
		lm

Iiuc, Intel introduced EPT with Nehalem arch, which preceds Haswell by ~ 
5 years.

Q:
	Am I out of luck re: PVH with more modern Haswell? Or is there a 
different check I should be running ?

> At present the only PVH guest is an x86 64bit PV linux.

Is this still current/true info?