linux-kernel - Re: [RESEND PATCH v2] KVM: SVM: Flush Hyper-V TLB when required

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Message-Id: <20230327141039.3751076-1-pbonzini@redhat.com>
Date:   Mon, 27 Mar 2023 10:10:40 -0400
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     jpiotrowski@...ux.microsoft.com
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Tianyu Lan <ltykernel@...il.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Sean Christopherson <seanjc@...gle.com>, stable@...r.kernel.org
Subject: Re: [RESEND PATCH v2] KVM: SVM: Flush Hyper-V TLB when required

Split svm_flush_tlb_current() into separate callbacks for the 3 cases
(guest/all/current), and issue the required Hyper-V hypercall when a
Hyper-V TLB flush is needed. The most important case where the TLB flush
was missing is when loading a new PGD, which is followed by what is now
svm_flush_tlb_current().

Queued, thanks.  I changed the return value to -EOPNOTSUPP.

Paolo