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From: Dave Hansen <dave.hansen@intel.com>
To: Chao Gao <chao.gao@intel.com>,
	"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"linux-coco@lists.linux.dev" <linux-coco@lists.linux.dev>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"bp@alien8.de" <bp@alien8.de>, "x86@kernel.org" <x86@kernel.org>,
	"kas@kernel.org" <kas@kernel.org>,
	"hpa@zytor.com" <hpa@zytor.com>,
	"yilun.xu@linux.intel.com" <yilun.xu@linux.intel.com>,
	"mingo@redhat.com" <mingo@redhat.com>,
	"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
	"tglx@kernel.org" <tglx@kernel.org>
Subject: Re: [RFC PATCH v2 02/10] x86/virt/tdx: Convert the version metadata reader
Date: Thu, 24 Sep 2026 12:12:11 -0700	[thread overview]
Message-ID: <2042fa92-0b33-4ce2-a288-8eebda2b7305@intel.com> (raw)
In-Reply-To: <arS6D6KoPbqVBtPl@intel.com>

On 9/23/26 22:50, Chao Gao wrote:
>>> +static int get_tdx_sys_info_version(struct tdx_sys_info_version *version)
>>> +{
>>> +	return read_sys_metadata_table(version_mappings, version);
>>> +}
>> I'm not sure we need all of these helpers that are each only called once?
> I'd prefer to keep them, for a few reasons:
> 
> 1. This one is actually called twice: from get_tdx_sys_info() and from
>    tdx_module_run_update().

Neither has any real space constraints, I'll note.

> 2. The helper name describes what is being read better than a bare
>    read_sys_metadata_table() call.

What part? that it comes from "sys_info" as opposed to it being
"metadata". Meh. Why does it matter?

> 3. Some helpers do more than read a table (see get_tdx_sys_info_td_conf()).
>    Without per-class helpers, get_tdx_sys_info() would open-code
>    read_sys_metadata_table() for some classes and call a helper for
>    others, which looks inconsistent. With one helper per metadata class,
>    every class is read the same way.

I value lower levels of abstraction over naming consistency.

Remove the helper, please.

  reply	other threads:[~2026-09-24 19:12 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-18 13:29 [RFC PATCH v2 00/10] TDX: Stop auto-generating the global metadata code Chao Gao
2026-09-18 13:29 ` [RFC PATCH v2 01/10] x86/virt/tdx: Add a helper to read a table of metadata fields Chao Gao
2026-09-23 22:20   ` Edgecombe, Rick P
2026-09-24  5:36     ` Chao Gao
2026-09-24  6:13   ` Binbin Wu
2026-09-18 13:29 ` [RFC PATCH v2 02/10] x86/virt/tdx: Convert the version metadata reader Chao Gao
2026-09-23 22:26   ` Edgecombe, Rick P
2026-09-24  5:50     ` Chao Gao
2026-09-24 19:12       ` Dave Hansen [this message]
2026-09-24 19:53       ` Edgecombe, Rick P
2026-09-24  6:40   ` Binbin Wu
2026-09-18 13:29 ` [RFC PATCH v2 03/10] x86/virt/tdx: Convert the features " Chao Gao
2026-09-18 13:29 ` [RFC PATCH v2 04/10] x86/virt/tdx: Convert the tdmr " Chao Gao
2026-09-18 13:29 ` [RFC PATCH v2 05/10] x86/virt/tdx: Convert the td_ctrl " Chao Gao
2026-09-18 13:29 ` [RFC PATCH v2 06/10] x86/virt/tdx: Convert the handoff " Chao Gao
2026-09-18 13:29 ` [RFC PATCH v2 07/10] x86/virt/tdx: Convert the td_conf " Chao Gao
2026-09-18 13:29 ` [RFC PATCH v2 08/10] x86/virt/tdx: Remove tdx_global_metadata.c Chao Gao
2026-09-23 22:53   ` Edgecombe, Rick P
2026-09-18 13:29 ` [RFC PATCH v2 09/10] x86/virt/tdx: Use early returns in get_tdx_sys_info() Chao Gao
2026-09-23 22:52   ` Edgecombe, Rick P
2026-09-24  7:28     ` Chao Gao
2026-09-18 13:29 ` [RFC PATCH v2 10/10] x86/virt/tdx: Verify structure member sizes against metadata field IDs Chao Gao
2026-09-23 22:47   ` Edgecombe, Rick P
2026-09-24  7:20     ` Chao Gao
2026-09-23  0:47 ` [RFC PATCH v2 00/10] TDX: Stop auto-generating the global metadata code Edgecombe, Rick P
2026-09-23  8:23   ` Chao Gao
2026-09-23  5:44 ` Tony Lindgren
2026-09-23  8:19   ` Chao Gao
2026-09-23  8:37     ` Tony Lindgren

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