linux-kernel - Re: [PATCH 01/15] KVM: VMX: Use x86 core API to access to fs_base and inactive gs

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Message-ID: <87k0h1leqj.ffs@tglx>
Date:   Sun, 21 Nov 2021 16:17:56 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Lai Jiangshan <jiangshanlai@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     kvm@...r.kernel.org, Lai Jiangshan <laijs@...ux.alibaba.com>,
        x86@...nel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, Ingo Molnar <mingo@...hat.com>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH 01/15] KVM: VMX: Use x86 core API to access to fs_base
 and inactive gs_base

Lai,

On Thu, Nov 18 2021 at 19:08, Lai Jiangshan wrote:
> From: Lai Jiangshan <laijs@...ux.alibaba.com>
>
> And they use FSGSBASE instructions when enabled.

That's really not a proper explanation for adding yet more exports.

Thanks,

        tglx