linux-kernel - Re: [PATCH v3 14/37] KVM: x86: Move "flush guest's TLB" logic to separate kvm_x86

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Message-ID: <87d0905s8x.fsf@vitty.brq.redhat.com>
Date:   Wed, 25 Mar 2020 17:11:42 +0100
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Ben Gardon <bgardon@...gle.com>,
        Junaid Shahid <junaids@...gle.com>,
        Liran Alon <liran.alon@...cle.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        John Haxby <john.haxby@...cle.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: [PATCH v3 14/37] KVM: x86: Move "flush guest's TLB" logic to separate kvm_x86_ops hook

Sean Christopherson <sean.j.christopherson@...el.com> writes:

> On Wed, Mar 25, 2020 at 11:23:41AM +0100, Vitaly Kuznetsov wrote:
>> Sean Christopherson <sean.j.christopherson@...el.com> writes:
>> I *think* I've commented on the previous version that we also have
>> hyperv-style PV TLB flush and this will likely need to be switched to
>> tlb_flush_guest().
>
> Oh, you most definitely commented about HyperV's PV TLB flush, looking at
> that code is what led me down this rabbit hole :-)

Ah, I was just worried it's Groundhog Day all over again :-) And I
didn't see you touching hyperv.c 

-- 
Vitaly