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a="1667480" X-IronPort-AV: E=Sophos;i="6.27,178,1787036400"; d="scan'208";a="1667480" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Oct 2026 18:26:54 -0700 X-CSE-ConnectionGUID: pZzCRkJsSSKRd85IJZg0Ig== X-CSE-MsgGUID: Av7Q4Zo1QUidsSdx7k04NA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,178,1787036400"; d="scan'208";a="4077168" Received: from unknown (HELO [10.238.0.97]) ([10.238.0.97]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Oct 2026 18:26:48 -0700 Message-ID: Date: Mon, 26 Oct 2026 09:26:44 +0800 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 05/15] virt: tdx-guest: Add TDCM helpers and TEE-IO support check To: "Duan, Zhenzhong" , Nikolay Borisov , "x86@kernel.org" , "linux-coco@lists.linux.dev" , "linux-kernel@vger.kernel.org" Cc: "dave.hansen@linux.intel.com" , "tglx@kernel.org" , "mingo@redhat.com" , "bp@alien8.de" , "hpa@zytor.com" , "Hansen, Dave" , "kas@kernel.org" , "Edgecombe, Rick P" , "jgg@nvidia.com" , "nicolinc@nvidia.com" , "aik@amd.com" , "aneesh.kumar@kernel.org" , "seanjc@google.com" , "pbonzini@redhat.com" , "yilun.xu@linux.intel.com" , "Gao, Chao" , "Verma, Vishal L" , "Tian, Kevin" , "Peng, Chao P" References: <20260924041032.1096569-1-zhenzhong.duan@intel.com> <20260924041032.1096569-6-zhenzhong.duan@intel.com> <686a2511-1d4b-47cc-abdb-951693cf1771@suse.com> Content-Language: en-US From: Xiaoyao Li In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/14/2026 2:11 PM, Duan, Zhenzhong wrote: >> This is used to allow TD guest TEE-IO Device Control and Management >> (TDCM) module to >> manage the device. The TDCM leaf functions are defined in the following >> table >> >> Is TDCM module implemented via the NRX facility ? The TDX Connect spec >> never mentions the TDCM module. A bit more details are required in order >> to better understand why you've implemented this the way you have. > "TDCM module" is GHCI terminology. In this series, the guest-side > implementation is in the TDX TSM driver; it is not an NRX module. I think the TDX guest TSM driver is just the implementation of the "TDCM module" called in GHCI, right?