linux-kernel - Re: [PATCH v4 00/19] Enable FRED with KVM VMX

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Message-ID: <E56DFF0F-8BB8-4E19-805B-B40344E6C750@zytor.com>
Date: Tue, 24 Jun 2025 11:40:13 -0700
From: "H. Peter Anvin" <hpa@...or.com>
To: Xin Li <xin@...or.com>, Sean Christopherson <seanjc@...gle.com>
CC: pbonzini@...hat.com, kvm@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, corbet@....net, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        x86@...nel.org, andrew.cooper3@...rix.com, luto@...nel.org,
        peterz@...radead.org, chao.gao@...el.com, xin3.li@...el.com
Subject: Re: [PATCH v4 00/19] Enable FRED with KVM VMX

On June 24, 2025 11:02:41 AM PDT, Xin Li <xin@...or.com> wrote:
>On 6/24/2025 10:47 AM, H. Peter Anvin wrote:
>> FRED doesn't lean on CET... one could argue it leans on LASS, at least to a small extent, though.
>
>Probably I used a wrong verb "lean", "overlap" is better.

I would personally say to the extent there is overlap it is the opposite direction (FRED helps enable kCET, but uCET is pretty much orthogonal.)