From: Nikolay Borisov <nik.borisov@suse.com>
To: Xiaoyao Li <xiaoyao.li@intel.com>,
"Duan, Zhenzhong" <zhenzhong.duan@intel.com>,
"x86@kernel.org" <x86@kernel.org>,
"linux-coco@lists.linux.dev" <linux-coco@lists.linux.dev>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: "dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
"tglx@kernel.org" <tglx@kernel.org>,
"mingo@redhat.com" <mingo@redhat.com>,
"bp@alien8.de" <bp@alien8.de>, "hpa@zytor.com" <hpa@zytor.com>,
"Hansen, Dave" <dave.hansen@intel.com>,
"kas@kernel.org" <kas@kernel.org>,
"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
"jgg@nvidia.com" <jgg@nvidia.com>,
"nicolinc@nvidia.com" <nicolinc@nvidia.com>,
"aik@amd.com" <aik@amd.com>,
"aneesh.kumar@kernel.org" <aneesh.kumar@kernel.org>,
"seanjc@google.com" <seanjc@google.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"yilun.xu@linux.intel.com" <yilun.xu@linux.intel.com>,
"Gao, Chao" <chao.gao@intel.com>,
"Verma, Vishal L" <vishal.l.verma@intel.com>,
"Tian, Kevin" <kevin.tian@intel.com>,
"Peng, Chao P" <chao.p.peng@intel.com>
Subject: Re: [RFC PATCH 05/15] virt: tdx-guest: Add TDCM helpers and TEE-IO support check
Date: Mon, 26 Oct 2026 09:13:50 +0200 [thread overview]
Message-ID: <c3a973b6-b222-46df-bd79-fb0df6d7b0c8@suse.com> (raw)
In-Reply-To: <d4183670-c640-47b5-a70a-659861b0a21d@intel.com>
On 26.10.26 г. 3:26 ч., Xiaoyao Li wrote:
> 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?
I think we are entering a dangerous bikeshedding territory here. But
IIUC TDCM seems to be something which the TD calls, because it sends the
TDCM function ids to the host, so the TDCM should really be implemented
by the host. But I think such construct just adds more confusion, TDCM
is just a subset of the GHCI, so nothing really more special.
next prev parent reply other threads:[~2026-10-26 7:13 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-24 4:10 [RFC PATCH 00/15] PCI/TSM: coco/tdx-guest: Implement TDX-Connect PCIe TDISP (phase2) Zhenzhong Duan
2026-09-24 4:10 ` [RFC PATCH 01/15] x86/tdx: Export tdg_vm_rd() for tdx-guest module Zhenzhong Duan
2026-09-30 22:13 ` Peter Fang
2026-10-01 12:38 ` Xu Yilun
2026-10-08 6:45 ` Duan, Zhenzhong
2026-10-08 16:30 ` Edgecombe, Rick P
2026-09-24 4:10 ` [RFC PATCH 02/15] x86/tdx: Add TDCM hypercall wrapper for TDX Connect Zhenzhong Duan
2026-10-13 14:34 ` Nikolay Borisov
2026-10-14 6:19 ` Duan, Zhenzhong
2026-10-14 6:27 ` Nikolay Borisov
2026-10-14 7:22 ` Duan, Zhenzhong
2026-10-26 0:33 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 03/15] x86/tdx: Add TDG.TDI.RD module call " Zhenzhong Duan
2026-09-25 0:06 ` Edgecombe, Rick P
2026-10-08 6:27 ` Duan, Zhenzhong
2026-10-08 16:42 ` Edgecombe, Rick P
2026-10-09 2:28 ` Duan, Zhenzhong
2026-10-26 0:51 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 04/15] virt: tdx-guest: Support devsec TSM for secure devices Zhenzhong Duan
2026-10-15 13:42 ` Xu Yilun
2026-10-16 6:42 ` Duan, Zhenzhong
2026-10-26 1:12 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 05/15] virt: tdx-guest: Add TDCM helpers and TEE-IO support check Zhenzhong Duan
2026-10-13 14:31 ` Nikolay Borisov
2026-10-14 6:11 ` Duan, Zhenzhong
2026-10-26 1:26 ` Xiaoyao Li
2026-10-26 7:13 ` Nikolay Borisov [this message]
2026-10-14 12:52 ` Nikolay Borisov
2026-10-15 6:24 ` Duan, Zhenzhong
2026-10-26 2:06 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 06/15] virt: tdx-guest: Support TDI bind and unbind operations Zhenzhong Duan
2026-10-13 12:10 ` Nikolay Borisov
2026-10-14 3:06 ` Duan, Zhenzhong
2026-10-14 6:32 ` Nikolay Borisov
2026-10-14 7:33 ` Duan, Zhenzhong
2026-10-17 18:38 ` Nikolay Borisov
2026-10-19 2:16 ` Duan, Zhenzhong
2026-10-26 2:32 ` Xiaoyao Li
2026-10-26 2:38 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 07/15] PCI/TSM: Track Device Interface Report MMIO range index Zhenzhong Duan
2026-10-26 2:45 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 08/15] x86/tdx: Add TDG.MMIO.ACCEPT module call wrapper for TDX Connect Zhenzhong Duan
2026-09-24 23:41 ` Edgecombe, Rick P
2026-09-25 0:02 ` Edgecombe, Rick P
2026-10-08 6:01 ` Duan, Zhenzhong
2026-10-08 16:47 ` Edgecombe, Rick P
2026-10-08 5:49 ` Duan, Zhenzhong
2026-10-08 16:44 ` Edgecombe, Rick P
2026-10-09 2:16 ` Duan, Zhenzhong
2026-09-24 4:10 ` [RFC PATCH 09/15] virt: tdx-guest: Capture the TDI report during device lock Zhenzhong Duan
2026-10-26 5:04 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 10/15] virt: tdx-guest: Set up and accept private MMIO ranges Zhenzhong Duan
2026-10-26 5:22 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 11/15] x86/tdx: Add TDG.TDI.START module call wrapper for TDX Connect Zhenzhong Duan
2026-09-24 4:10 ` [RFC PATCH 12/15] virt: tdx-guest: Support Trust Device Interface (TDI) activation Zhenzhong Duan
2026-10-26 7:19 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 13/15] x86/tdx: Add __tdcall_saved() helper Zhenzhong Duan
2026-10-26 7:35 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 14/15] x86/tdx: Add TDG.DMAR.ACCEPT module call wrapper for TDX Connect Zhenzhong Duan
2026-10-26 7:39 ` Xiaoyao Li
2026-09-24 4:10 ` [RFC PATCH 15/15] virt: tdx-guest: Accept default DMAR entry during PCI driver attach Zhenzhong Duan
2026-10-26 7:49 ` Xiaoyao Li
2026-10-26 12:02 ` Jason Gunthorpe
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