linux-kernel - Re: [PATCH 0/5] SEV fixes and performance enhancements

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Message-ID: <fdabc7b9-7136-b780-ad2b-5821b7c97269@redhat.com>
Date:   Wed, 9 Oct 2019 12:08:01 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     "Lendacky, Thomas" <Thomas.Lendacky@....com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     Radim Krčmář <rkrcmar@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        "Singh, Brijesh" <brijesh.singh@....com>,
        David Rientjes <rientjes@...gle.com>
Subject: Re: [PATCH 0/5] SEV fixes and performance enhancements

On 03/10/19 23:17, Lendacky, Thomas wrote:
> From: Tom Lendacky <thomas.lendacky@....com>
> 
> This patch series provides fixes in the area of ASID assignment and VM
> deactivation.
> 
> Additionally, it provides some performance enhancements by reducing the
> number of WBINVD/DF_FLUSH invocations that are made.
> 
> Note: The third patch in the series modifies a file that is outside of
>       the arch/x86/kvm directory.
> 
> ---
> 
> Patches based on https://git.kernel.org/pub/scm/virt/kvm/kvm.git next
> and commit:
>   fd3edd4a9066 ("KVM: nVMX: cleanup and fix host 64-bit mode checks")
> 
> Tom Lendacky (5):
>   KVM: SVM: Serialize access to the SEV ASID bitmap
>   KVM: SVM: Guard against DEACTIVATE when performing WBINVD/DF_FLUSH
>   KVM: SVM: Remove unneeded WBINVD and DF_FLUSH when starting SEV guests
>   KVM: SVM: Convert DEACTIVATE mutex to read/write semaphore
>   KVM: SVM: Reduce WBINVD/DF_FLUSH invocations
> 
>  arch/x86/kvm/svm.c           | 105 +++++++++++++++++++++++++++--------
>  drivers/crypto/ccp/psp-dev.c |   9 +++
>  2 files changed, 92 insertions(+), 22 deletions(-)
> 

Queued, thanks.  I squashed 4/5 and 5/5 since there's not much that
survives of patch 4 after the next one.

Paolo