Re: [PATCH 6/9] KVM: x86: Provide paravirtualized flush_tlb_multi()

From: Vitaly Kuznetsov
Date: Wed Jun 26 2019 - 13:41:35 EST

Andy Lutomirski <luto@xxxxxxxxxx> writes:

> All this being said, do we currently have any system that supports
> PCID *and* remote flushes? I guess KVM has some mechanism, but I'm
> not that familiar with its exact capabilities. If I remember right,
> Hyper-V doesn't expose PCID yet.

It already does (and support it to certain extent), see

commit 617ab45c9a8900e64a78b43696c02598b8cad68b
Author: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Date: Wed Jan 24 11:36:29 2018 +0100

x86/hyperv: Stop suppressing X86_FEATURE_PCID