linux-kernel - Re: [PATCH v2 00/21] Runtime TDX Module update support

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Message-ID: <aQQkrx2hXkPdcifr@intel.com>
Date: Fri, 31 Oct 2025 10:53:35 +0800
From: Chao Gao <chao.gao@...el.com>
To: Vishal Annapurve <vannapurve@...gle.com>
CC: Sean Christopherson <seanjc@...gle.com>, <dan.j.williams@...el.com>,
	"Erdem Aktas" <erdemaktas@...gle.com>, Dave Hansen <dave.hansen@...el.com>,
	"Elena Reshetova" <elena.reshetova@...el.com>, "linux-coco@...ts.linux.dev"
	<linux-coco@...ts.linux.dev>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "x86@...nel.org" <x86@...nel.org>, "Reinette
 Chatre" <reinette.chatre@...el.com>, Ira Weiny <ira.weiny@...el.com>, "Kai
 Huang" <kai.huang@...el.com>, "yilun.xu@...ux.intel.com"
	<yilun.xu@...ux.intel.com>, "sagis@...gle.com" <sagis@...gle.com>,
	"paulmck@...nel.org" <paulmck@...nel.org>, "nik.borisov@...e.com"
	<nik.borisov@...e.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen
	<dave.hansen@...ux.intel.com>, "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar
	<mingo@...hat.com>, "Kirill A. Shutemov" <kas@...nel.org>, Paolo Bonzini
	<pbonzini@...hat.com>, Rick P Edgecombe <rick.p.edgecombe@...el.com>, "Thomas
 Gleixner" <tglx@...utronix.de>
Subject: Re: [PATCH v2 00/21] Runtime TDX Module update support

>A reference patch we tested for "Avoid updates during update-sensitive
>times" and one caveat was that
>/sys/devices/virtual/tdx/tdx_tsm/version was not available post update
>failure until a subsequent successful update:

I also tested this. It works well to prevent updates during TD build, so,

  Tested-by: Chao Gao <chao.gao@...el.com>

And I can integrate this change into my next version if you don't object.

Regarding the caveat, could you check if the diff [*] I posted earlier this
week can fix it?

[1]: https://lore.kernel.org/linux-coco/aQAwRrvYMcaMsu02@intel.com/