linux-kernel - Re: [PATCH 5/5] x86/virt/tdx: Export global metadata read infrastructure

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Date: Fri, 3 May 2024 00:21:21 +0000
From: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To: "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Huang, Kai"
	<kai.huang@...el.com>
CC: "Hansen, Dave" <dave.hansen@...el.com>, "seanjc@...gle.com"
	<seanjc@...gle.com>, "bp@...en8.de" <bp@...en8.de>, "x86@...nel.org"
	<x86@...nel.org>, "peterz@...radead.org" <peterz@...radead.org>,
	"hpa@...or.com" <hpa@...or.com>, "mingo@...hat.com" <mingo@...hat.com>,
	"kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>, "pbonzini@...hat.com"
	<pbonzini@...hat.com>, "jgross@...e.com" <jgross@...e.com>, "Yamahata, Isaku"
	<isaku.yamahata@...el.com>
Subject: Re: [PATCH 5/5] x86/virt/tdx: Export global metadata read
 infrastructure

On Sat, 2024-03-02 at 00:20 +1300, Kai Huang wrote:
> KVM will need to read a bunch of non-TDMR related metadata to create and
> run TDX guests.  Export the metadata read infrastructure for KVM to use.
> 
> Specifically, export two helpers:
> 
> 1) The helper which reads multiple metadata fields to a buffer of a
>    structure based on the "field ID -> structure member" mapping table.
> 
> 2) The low level helper which just reads a given field ID.
> 
Could 2 be a static inline in a helper, and then only have one export?