linux-kernel - Re: [RFC PATCH v5 008/104] KVM: TDX: Add a function to initialize TDX module

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Message-ID: <20220331194144.GA2084469@ls.amr.corp.intel.com>
Date:   Thu, 31 Mar 2022 12:41:44 -0700
From:   Isaku Yamahata <isaku.yamahata@...il.com>
To:     Kai Huang <kai.huang@...el.com>
Cc:     isaku.yamahata@...el.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, isaku.yamahata@...il.com,
        Paolo Bonzini <pbonzini@...hat.com>,
        Jim Mattson <jmattson@...gle.com>, erdemaktas@...gle.com,
        Connor Kuehl <ckuehl@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>
Subject: Re: [RFC PATCH v5 008/104] KVM: TDX: Add a function to initialize
 TDX module

On Thu, Mar 31, 2022 at 04:31:10PM +1300,
Kai Huang <kai.huang@...el.com> wrote:

> On Fri, 2022-03-04 at 11:48 -0800, isaku.yamahata@...el.com wrote:
> > From: Isaku Yamahata <isaku.yamahata@...el.com>

> > Add a wrapper function to initialize the TDX module and get system-wide
> > parameters via those APIs.  Because TDX requires VMX enabled, It will be
> > called on-demand when the first guest TD is created via x86 KVM init_vm
> > callback.
> 
> Why not just merge this patch with the change where you implement the init_vm
> callback?  Then you can just declare this patch as "detect and initialize TDX
> module when first VM is created", or something like that..

Ok. Anyway in the next respoin, tdx module initialization will be done when
loading kvm_intel.ko.  So the whole part will be changed and will be a part
of module loading.
-- 
Isaku Yamahata <isaku.yamahata@...il.com>