Re: [Xen-devel] [PATCH 00/13] x86/paravirt: Make pv ops code generation more closely match reality

[Vitaly Kuznetsov]

Josh Poimboeuf <jpoimboe@xxxxxxxxxx> writes:

> - For the most common runtime cases (everything except Xen and vSMP),
>   vmlinux disassembly now matches what the actual runtime code looks
>   like.  This improves debuggability and kernel developer sanity (a
>   precious resource).
>
> ...
>
> - It's hopefully a first step in simplifying paravirt patching by
>   getting rid of .parainstructions, pv ops, and apply_paravirt()
>   completely.  (I think Xen can be changed to set CPU feature bits to
>   specify which ops it needs during early boot, then those ops can be
>   patched in using early alternatives.)

JFYI starting 4.14 Xen PV is not the only user of pv_mmu_ops, Hyper-V
uses it for TLB shootdown now.

-- 
  Vitaly