Re: Support of lguest?

[Vitaly Kuznetsov]

Juergen Gross <jgross@xxxxxxxx> writes:

> Lguest and Xen pv-guests are the only users of pv_mmu_ops (with the
> one exception of the .exit_mmap member, which is being used by Xen
> HVM-guests, too).
>
> As it is possible now to build a kernel without Xen pv-guest support
> while keeping PVH and PVHVM support, I thought about putting most
> pv_mmu_ops functions in #ifdef CONFIG_XEN_HAS_PVMMU sections.

There is an ongoing work to enable PV TLB flushing for Hyper-V guests:
http://driverdev.linuxdriverproject.org/pipermail/driverdev-devel/2017-April/104411.html

it utilizes .flush_tlb_others member in pv_mmu_ops.

hopefully, this work will be merged in 4.13.

-- 
  Vitaly