[V5 PATCH 0/1] x86/xen: Set EFER.NX and EFER.SCE in PVH guests

[Mukesh Rathor]

Hi,

Attached V5 patch for fixing the EFER bugs on PVH.

Changes in v5 (Mukesh):
  - Jan reminded us that vcpu 0 could go offline/online. So, add flag back 
    instead of using cpuid to return from xen_pvh_early_cpu_init.
  - Boris comments: 
       o Rename to xen_pvh_early_cpu_init
       o Add ifdef around pvh functions in enlighten.c too.
  - Tab before closing brace to pacify checkpatch.pl

Changes in v4 (David):
  - cpu == 0 => boot CPU
  - Reduce #ifdefs.
  - Add patch for XEN_PVH docs.

Changes in v3 (David):
  - Use common xen_pvh_cpu_early_init() function for boot and secondary
    VCPUs.

Changes in v2: (Mukesh):
  - Use assembly macro to unify code for boot and secondary VCPUs.

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