From: "Dan Williams (nvidia)" <djbw@kernel.org>
To: Xu Yilun <yilun.xu@linux.intel.com>,
kas@kernel.org, djbw@kernel.org, rick.p.edgecombe@intel.com,
x86@kernel.org, peter.fang@intel.com
Cc: linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, sohil.mehta@intel.com,
yilun.xu@intel.com, yilun.xu@linux.intel.com,
baolu.lu@linux.intel.com, zhenzhong.duan@intel.com,
xiaoyao.li@intel.com
Subject: Re: [PATCH 04/15] x86/virt/tdx: Enable the Extensions right after basic TDX Module init
Date: Fri, 12 Jun 2026 17:08:48 -0700 [thread overview]
Message-ID: <6a2c9f90d348_9b8551003e@djbw-dev.notmuch> (raw)
In-Reply-To: <20260522034128.3144354-5-yilun.xu@linux.intel.com>
Xu Yilun wrote:
> The detailed initialization flow for TDX Module Extensions has been
> fully implemented. Enable the flow after basic TDX Module
> initialization.
>
> Theoretically, the Extensions doesn't need to be enabled right after
> basic TDX initialization. It could be enabled right before the first
> Extension SEAMCALL is issued. That would save or postpone memory usage.
> But it isn't worth the complexity, the needs for the Extensions are vast
> but the savings are little for a typical TDX capable system (about
> 0.001% of memory). So the Linux decision is to just enable it along with
> the basic TDX.
No real point in rehashing the rationale for the "any available, all the
time" policy yet again especially when this directly conflicts with the
"relatively large amount" comment in the original cover letter.
Otherwise I agree with the proposed reordering of this initial series.
In general though, no big showstoppers for me in this first 4.
next prev parent reply other threads:[~2026-06-13 0:08 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-22 3:41 [PATCH 00/15] Enable TDX Module Extensions and DICE-based TDX Quoting Xu Yilun
2026-05-22 3:41 ` [PATCH 01/15] x86/virt/tdx: Read global metadata for TDX Module Extensions Xu Yilun
2026-05-25 6:24 ` Xiaoyao Li
2026-05-25 6:54 ` Xiaoyao Li
2026-05-27 15:35 ` Kiryl Shutsemau
2026-05-28 4:25 ` Xu Yilun
2026-05-28 21:17 ` Edgecombe, Rick P
2026-05-29 15:34 ` Xu Yilun
2026-05-27 6:05 ` Sohil Mehta
2026-05-27 7:11 ` Xu Yilun
2026-05-27 17:17 ` Sohil Mehta
2026-05-28 3:48 ` Xu Yilun
2026-05-28 21:00 ` Edgecombe, Rick P
2026-05-29 16:59 ` Xu Yilun
2026-06-09 13:06 ` Adrian Hunter
2026-06-10 3:20 ` Xu Yilun
2026-06-12 22:20 ` Dan Williams (nvidia)
2026-05-22 3:41 ` [PATCH 02/15] x86/virt/tdx: Add extra memory to TDX Module for Extensions Xu Yilun
2026-05-25 8:56 ` Xiaoyao Li
2026-05-27 3:47 ` Xu Yilun
2026-05-27 6:38 ` Xiaoyao Li
2026-05-27 7:32 ` Xu Yilun
2026-05-27 8:18 ` Xiaoyao Li
2026-06-07 4:38 ` Kishen Maloor
2026-06-08 9:41 ` Xu Yilun
2026-06-09 13:38 ` Adrian Hunter
2026-06-10 5:13 ` Xu Yilun
2026-06-10 5:43 ` Adrian Hunter
2026-06-10 7:44 ` Xu Yilun
2026-06-12 23:49 ` Dan Williams (nvidia)
2026-05-22 3:41 ` [PATCH 03/15] x86/virt/tdx: Make TDX Module initialize Extensions Xu Yilun
2026-05-25 8:58 ` Xiaoyao Li
2026-06-05 8:46 ` Tony Lindgren
2026-06-09 15:14 ` Adrian Hunter
2026-06-10 8:09 ` Xu Yilun
2026-05-22 3:41 ` [PATCH 04/15] x86/virt/tdx: Enable the Extensions right after basic TDX Module init Xu Yilun
2026-05-25 6:00 ` Tony Lindgren
2026-05-27 4:02 ` Xu Yilun
2026-05-25 8:05 ` Xiaoyao Li
2026-05-28 21:32 ` Edgecombe, Rick P
2026-05-29 17:19 ` Xu Yilun
2026-06-07 4:38 ` Kishen Maloor
2026-06-08 10:12 ` Xu Yilun
2026-06-13 0:08 ` Dan Williams (nvidia) [this message]
2026-05-22 3:41 ` [RFC PATCH 05/15] x86/virt/tdx: Move tdx_tdr_pa() up in the file Xu Yilun
2026-05-28 21:32 ` Edgecombe, Rick P
2026-06-11 16:21 ` Adrian Hunter
2026-05-22 3:41 ` [RFC PATCH 06/15] x86/virt/tdx: Initialize Quoting extension during bringup Xu Yilun
2026-05-28 21:35 ` Edgecombe, Rick P
2026-06-11 16:22 ` Adrian Hunter
2026-06-13 0:00 ` Dan Williams (nvidia)
2026-05-22 3:41 ` [RFC PATCH 07/15] x86/virt/tdx: Prepare Quote buffer during extension bringup Xu Yilun
2026-05-28 22:30 ` Edgecombe, Rick P
2026-05-22 3:41 ` [RFC PATCH 08/15] x86/virt/tdx: Add interface to check Quoting availability Xu Yilun
2026-05-22 3:41 ` [RFC PATCH 09/15] x86/virt/tdx: Add interface to generate a Quote Xu Yilun
2026-05-28 22:30 ` Edgecombe, Rick P
2026-06-11 17:15 ` Adrian Hunter
2026-05-22 3:41 ` [RFC PATCH 10/15] x86/tdx: Move and rename Quote request structure Xu Yilun
2026-06-11 17:16 ` Adrian Hunter
2026-06-13 0:04 ` Dan Williams (nvidia)
2026-05-22 3:41 ` [RFC PATCH 11/15] KVM: TDX: Factor out userspace return path from tdx_get_quote() Xu Yilun
2026-05-22 3:41 ` [RFC PATCH 12/15] KVM: TDX: Add in-kernel Quote generation Xu Yilun
2026-06-13 0:20 ` Dan Williams (nvidia)
2026-05-22 3:41 ` [RFC PATCH 13/15] KVM: TDX: Support event-notify interrupts only with userspace quoting Xu Yilun
2026-06-11 19:36 ` Adrian Hunter
2026-05-22 3:41 ` [RFC PATCH 14/15] x86/virt/tdx: Embed version info in SEAMCALL leaf function definitions Xu Yilun
2026-05-25 9:00 ` Xiaoyao Li
2026-05-27 6:45 ` Xu Yilun
2026-05-27 7:44 ` Xiaoyao Li
2026-05-27 11:45 ` Xu Yilun
2026-06-12 5:47 ` Adrian Hunter
2026-05-22 3:41 ` [RFC PATCH 15/15] x86/virt/tdx: Enable TDX Quoting extension Xu Yilun
2026-05-25 5:17 ` Tony Lindgren
2026-05-25 10:51 ` Xiaoyao Li
2026-05-26 9:00 ` Tony Lindgren
2026-05-26 15:45 ` Xu Yilun
2026-05-27 1:30 ` Xiaoyao Li
2026-06-07 4:41 ` Kishen Maloor
2026-06-08 15:10 ` Xu Yilun
2026-05-27 5:23 ` [PATCH 00/15] Enable TDX Module Extensions and DICE-based TDX Quoting Sohil Mehta
2026-05-27 10:38 ` Xu Yilun
2026-05-27 17:09 ` Sohil Mehta
2026-05-28 4:52 ` Xu Yilun
2026-05-28 19:50 ` Sohil Mehta
2026-06-01 9:36 ` Xu Yilun
2026-06-01 20:17 ` Sohil Mehta
2026-06-02 5:36 ` Xu Yilun
2026-06-07 4:36 ` Kishen Maloor
2026-06-08 6:54 ` Xu Yilun
2026-06-08 18:31 ` Adrian Hunter
2026-06-12 22:03 ` Dan Williams (nvidia)
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