From: Jason Gunthorpe <jgg@nvidia.com>
To: Xu Yilun <yilun.xu@linux.intel.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
Alexey Kardashevskiy <aik@amd.com>,
Dan Williams <dan.j.williams@intel.com>,
linux-coco@lists.linux.dev, linux-pci@vger.kernel.org,
gregkh@linuxfoundation.org, lukas@wunner.de,
suzuki.poulose@arm.com, sameo@rivosinc.com, zhiw@nvidia.com
Subject: Re: [RFC PATCH 3/3] iommufd/tsm: Add tsm_bind/unbind iommufd ioctls
Date: Thu, 5 Jun 2025 11:54:35 -0300 [thread overview]
Message-ID: <20250605145435.GA19710@nvidia.com> (raw)
In-Reply-To: <aEEOKXxTuUifYxJY@yilunxu-OptiPlex-7050>
On Thu, Jun 05, 2025 at 11:25:29AM +0800, Xu Yilun wrote:
> That's good point, thanks. S-EPT is controlled by TSM, but the fact is,
> unlike RMP it needs too much help from VMM side, and now KVM is the
> helper. I will continue to investigate if TDX TSM driver could opt in to
> become another helper and how to coordinate with KVM.
I think it would be quite a simplification if the iommufd operation
would also cause the TSM to setup the secure MMIO directly from the
pPCI device and remove hypervisor access to it.
Then you don't need DMABUF to KVM at all.
The create vPCI call would have to specify the base virtual addresses
of all the BARs from userspace, which is probably OK as I suspose you
also cannot disable or relocate the MMIO BAR while in T=1 mode.
Jason
next prev parent reply other threads:[~2025-06-05 14:54 UTC|newest]
Thread overview: 173+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-16 5:47 [PATCH v3 00/13] PCI/TSM: Core infrastructure for PCI device security (TDISP) Dan Williams
2025-05-16 5:47 ` [PATCH v3 01/13] coco/tsm: Introduce a core device for TEE Security Managers Dan Williams
2025-06-02 13:18 ` Jason Gunthorpe
2025-06-04 0:42 ` Dan Williams
2025-06-04 1:15 ` Dan Williams
2025-06-04 12:15 ` Jason Gunthorpe
2025-06-04 12:14 ` Jason Gunthorpe
2025-06-06 3:33 ` Alexey Kardashevskiy
2025-06-06 2:09 ` Alexey Kardashevskiy
2025-05-16 5:47 ` [PATCH v3 02/13] PCI/IDE: Enumerate Selective Stream IDE capabilities Dan Williams
2025-06-17 12:16 ` Jonathan Cameron
2025-07-12 22:31 ` dan.j.williams
2025-05-16 5:47 ` [PATCH v3 03/13] PCI/TSM: Authenticate devices via platform TSM Dan Williams
2025-05-21 15:32 ` Aneesh Kumar K.V
2025-06-03 19:53 ` Dan Williams
2025-06-04 8:04 ` Aneesh Kumar K.V
2025-06-17 12:51 ` Jonathan Cameron
2025-07-12 22:07 ` dan.j.williams
2025-08-26 1:31 ` Alexey Kardashevskiy
2025-08-26 23:54 ` dan.j.williams
2025-08-27 4:44 ` Alexey Kardashevskiy
2025-08-28 19:27 ` dan.j.williams
2025-08-26 3:08 ` Alexey Kardashevskiy
2025-08-26 23:58 ` dan.j.williams
2025-08-27 5:06 ` Alexey Kardashevskiy
2025-08-26 10:22 ` Alexey Kardashevskiy
2025-08-27 0:15 ` dan.j.williams
2025-08-27 5:02 ` Alexey Kardashevskiy
2025-08-28 19:32 ` dan.j.williams
2025-05-16 5:47 ` [PATCH v3 04/13] PCI: Enable host-bridge emulation for PCI_DOMAINS_GENERIC platforms Dan Williams
2025-05-16 5:47 ` [PATCH v3 05/13] PCI: vmd: Switch to pci_bus_find_emul_domain_nr() Dan Williams
2025-05-16 5:47 ` [PATCH v3 06/13] samples/devsec: Introduce a PCI device-security bus + endpoint sample Dan Williams
2025-06-17 13:30 ` Jonathan Cameron
2025-07-13 1:58 ` dan.j.williams
2025-05-16 5:47 ` [PATCH v3 07/13] PCI: Add PCIe Device 3 Extended Capability enumeration Dan Williams
2025-06-17 13:36 ` Jonathan Cameron
2025-05-16 5:47 ` [PATCH v3 08/13] PCI/IDE: Add IDE establishment helpers Dan Williams
2025-06-17 14:04 ` Jonathan Cameron
2025-07-14 18:25 ` dan.j.williams
2025-07-03 2:59 ` Alexey Kardashevskiy
2025-05-16 5:47 ` [PATCH v3 09/13] PCI/IDE: Report available IDE streams Dan Williams
2025-05-18 12:48 ` kernel test robot
2025-06-17 14:16 ` Jonathan Cameron
2025-07-14 20:16 ` dan.j.williams
2025-05-16 5:47 ` [PATCH v3 10/13] PCI/TSM: Report active " Dan Williams
2025-06-17 14:21 ` Jonathan Cameron
2025-07-14 20:49 ` dan.j.williams
2025-05-16 5:47 ` [PATCH v3 11/13] samples/devsec: Add sample IDE establishment Dan Williams
2025-06-17 14:26 ` Jonathan Cameron
2025-07-14 20:59 ` dan.j.williams
2025-05-16 5:47 ` [PATCH v3 12/13] PCI/TSM: support TDI related operations for host TSM driver Dan Williams
2025-05-16 6:52 ` Xu Yilun
2025-05-20 7:17 ` Aneesh Kumar K.V
2025-05-21 9:35 ` Xu Yilun
2025-05-26 5:05 ` Aneesh Kumar K.V
2025-05-26 7:52 ` Alexey Kardashevskiy
2025-05-26 15:44 ` Aneesh Kumar K.V
2025-05-27 1:01 ` Alexey Kardashevskiy
2025-05-27 11:48 ` Aneesh Kumar K.V
2025-05-27 13:06 ` Jason Gunthorpe
2025-05-27 14:26 ` Aneesh Kumar K.V
2025-05-27 14:45 ` Jason Gunthorpe
2025-05-28 12:17 ` Aneesh Kumar K.V
2025-05-28 16:42 ` Jason Gunthorpe
2025-05-28 16:52 ` Jason Gunthorpe
2025-05-29 9:30 ` Xu Yilun
2025-05-29 13:43 ` Aneesh Kumar K.V
2025-05-29 14:09 ` Jason Gunthorpe
2025-05-30 3:00 ` Alexey Kardashevskiy
2025-05-30 13:21 ` Jason Gunthorpe
2025-05-29 13:49 ` Xu Yilun
2025-05-29 14:05 ` Jason Gunthorpe
2025-05-29 3:03 ` Alexey Kardashevskiy
2025-05-29 13:34 ` Aneesh Kumar K.V
2025-05-29 13:37 ` [RFC PATCH 1/3] coco: tsm: Add tsm_bind/unbind helpers Aneesh Kumar K.V (Arm)
2025-05-29 13:37 ` [RFC PATCH 2/3] iommufd/viommu: Add support to associate viommu with kvm instance Aneesh Kumar K.V (Arm)
2025-05-29 14:13 ` Jason Gunthorpe
2025-05-29 13:37 ` [RFC PATCH 3/3] iommufd/tsm: Add tsm_bind/unbind iommufd ioctls Aneesh Kumar K.V (Arm)
2025-05-29 14:32 ` Jason Gunthorpe
2025-05-30 8:33 ` Aneesh Kumar K.V
2025-05-30 18:18 ` Jason Gunthorpe
2025-05-31 16:25 ` Xu Yilun
2025-06-02 4:52 ` Alexey Kardashevskiy
2025-06-02 17:17 ` Xu Yilun
2025-06-04 1:47 ` Alexey Kardashevskiy
2025-06-04 5:02 ` Xu Yilun
2025-06-04 12:37 ` Jason Gunthorpe
2025-06-06 15:40 ` Xu Yilun
2025-06-06 16:34 ` Jason Gunthorpe
2025-06-09 4:47 ` Xu Yilun
2025-06-02 11:08 ` Aneesh Kumar K.V
2025-06-02 16:25 ` Xu Yilun
2025-06-02 16:48 ` Jason Gunthorpe
2025-06-03 4:05 ` Xu Yilun
2025-06-03 12:11 ` Jason Gunthorpe
2025-06-04 5:58 ` Xu Yilun
2025-06-04 12:36 ` Jason Gunthorpe
2025-06-05 3:05 ` Xu Yilun
2025-06-10 7:05 ` Alexey Kardashevskiy
2025-06-10 18:19 ` Jason Gunthorpe
2025-06-11 1:26 ` Alexey Kardashevskiy
2025-06-10 4:47 ` Alexey Kardashevskiy
2025-06-10 18:21 ` Jason Gunthorpe
2025-06-12 4:15 ` Xu Yilun
2025-06-03 5:00 ` Aneesh Kumar K.V
2025-06-03 10:50 ` Xu Yilun
2025-06-03 12:14 ` Jason Gunthorpe
2025-06-04 5:31 ` Xu Yilun
2025-06-04 12:31 ` Jason Gunthorpe
2025-06-05 3:25 ` Xu Yilun
2025-06-05 14:54 ` Jason Gunthorpe [this message]
2025-06-09 6:10 ` Xu Yilun
2025-06-09 16:42 ` Suzuki K Poulose
2025-06-09 18:07 ` Jason Gunthorpe
2025-06-10 7:31 ` Alexey Kardashevskiy
2025-06-12 5:44 ` Xu Yilun
2025-06-03 12:18 ` Jason Gunthorpe
2025-06-04 1:06 ` Dan Williams
2025-06-04 12:18 ` Jason Gunthorpe
2025-06-02 12:47 ` Jason Gunthorpe
2025-06-03 3:47 ` Xu Yilun
2025-06-03 12:08 ` Jason Gunthorpe
2025-06-04 6:39 ` Xu Yilun
2025-06-04 12:39 ` Jason Gunthorpe
2025-06-05 1:56 ` Xu Yilun
2025-07-15 10:29 ` Xu Yilun
2025-07-15 13:09 ` Jason Gunthorpe
2025-07-16 15:41 ` Xu Yilun
2025-07-16 16:31 ` Jason Gunthorpe
2025-07-17 8:28 ` Xu Yilun
2025-07-17 12:43 ` Jason Gunthorpe
2025-07-18 9:15 ` Xu Yilun
2025-07-18 12:26 ` Jason Gunthorpe
2025-07-20 2:37 ` Xu Yilun
2025-05-30 2:44 ` [PATCH v3 12/13] PCI/TSM: support TDI related operations for host TSM driver Alexey Kardashevskiy
2025-05-27 10:25 ` Suzuki K Poulose
2025-06-03 22:47 ` Dan Williams
2025-06-04 1:35 ` Alexey Kardashevskiy
2025-06-04 1:52 ` Dan Williams
2025-06-04 1:54 ` Dan Williams
2025-06-05 10:56 ` Alexey Kardashevskiy
2025-06-07 1:56 ` Dan Williams
2025-06-11 4:40 ` Alexey Kardashevskiy
2025-06-13 3:06 ` Dan Williams
2025-06-03 22:40 ` Dan Williams
2025-05-19 10:20 ` Alexey Kardashevskiy
2025-05-20 20:12 ` Dan Williams
2025-05-21 9:28 ` Xu Yilun
2025-05-26 8:08 ` Alexey Kardashevskiy
2025-05-29 14:20 ` Xu Yilun
2025-05-30 2:54 ` Alexey Kardashevskiy
2025-05-31 15:26 ` Xu Yilun
2025-06-02 4:51 ` Alexey Kardashevskiy
2025-06-02 18:51 ` Xu Yilun
2025-06-03 19:12 ` Dan Williams
2025-07-07 7:17 ` Aneesh Kumar K.V
2025-05-20 5:20 ` Aneesh Kumar K.V
2025-05-20 21:12 ` Dan Williams
2025-05-16 5:47 ` [PATCH v3 13/13] PCI/TSM: Add Guest TSM Support Dan Williams
2025-05-19 10:20 ` Alexey Kardashevskiy
2025-05-20 21:11 ` Dan Williams
2025-05-22 4:07 ` Alexey Kardashevskiy
2025-06-03 22:26 ` Dan Williams
2025-06-03 22:33 ` Jason Gunthorpe
2025-06-10 8:31 ` Alexey Kardashevskiy
2025-07-11 23:04 ` dan.j.williams
2025-05-20 9:25 ` Aneesh Kumar K.V
2025-05-20 21:27 ` Dan Williams
2025-05-20 11:00 ` Aneesh Kumar K.V
2025-05-20 21:31 ` Dan Williams
2025-06-03 19:07 ` Dan Williams
2025-05-21 15:03 ` Xu Yilun
2025-06-03 19:20 ` Dan Williams
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