From: Jason Gunthorpe <jgg@ziepe.ca>
To: Alexey Kardashevskiy <aik@amd.com>
Cc: Dan Williams <dan.j.williams@intel.com>,
Xu Yilun <yilun.xu@linux.intel.com>,
x86@kernel.org, kvm@vger.kernel.org,
linux-crypto@vger.kernel.org, linux-pci@vger.kernel.org,
linux-arch@vger.kernel.org,
Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
Ashish Kalra <ashish.kalra@amd.com>,
Joerg Roedel <joro@8bytes.org>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Robin Murphy <robin.murphy@arm.com>,
Kevin Tian <kevin.tian@intel.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Christoph Hellwig <hch@lst.de>,
Nikunj A Dadhania <nikunj@amd.com>,
Michael Roth <michael.roth@amd.com>,
Vasant Hegde <vasant.hegde@amd.com>,
Joao Martins <joao.m.martins@oracle.com>,
Nicolin Chen <nicolinc@nvidia.com>,
Lu Baolu <baolu.lu@linux.intel.com>,
Steve Sistare <steven.sistare@oracle.com>,
Lukas Wunner <lukas@wunner.de>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Dionna Glaze <dionnaglaze@google.com>,
Yi Liu <yi.l.liu@intel.com>,
iommu@lists.linux.dev, linux-coco@lists.linux.dev,
Zhi Wang <zhiw@nvidia.com>,
"Aneesh Kumar K . V" <aneesh.kumar@kernel.org>
Subject: Re: [RFC PATCH v2 14/22] iommufd: Add TIO calls
Date: Tue, 1 Apr 2025 12:53:42 -0300 [thread overview]
Message-ID: <20250401155342.GJ186258@ziepe.ca> (raw)
In-Reply-To: <926022a3-3985-4971-94bd-05c09e40c404@amd.com>
On Mon, Mar 17, 2025 at 01:32:31PM +1100, Alexey Kardashevskiy wrote:
> It is about accessing MMIO with Cbit set, and running DMA to/from private
> memory, in DPDK. On AMD, if we want the PCI's Tbit in MMIO, the Cbit needs
> to be set in some page table. "TVM" in this case is a few private pages (+
> bunch of PSP calls to bring to the right state) pretending to be a CVM which
> does not need to run. Thanks,
Yeah, though that may be infeasible on other platforms. I'm pretty
sure ARM and Intel route the Tbit packets directly to their secure
worlds so there is no possibility for VFIO to use them without also
using the secure world to create a VM.
Maybe AMD is different, IDK.
Jason
next prev parent reply other threads:[~2025-04-01 15:53 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-18 11:09 [RFC PATCH v2 00/22] TSM: Secure VFIO, TDISP, SEV TIO Alexey Kardashevskiy
2025-02-18 11:09 ` [RFC PATCH v2 01/22] pci/doe: Define protocol types and make those public Alexey Kardashevskiy
2025-04-15 20:15 ` Bjorn Helgaas
2025-02-18 11:09 ` [RFC PATCH v2 02/22] PCI/IDE: Fixes to make it work on AMD SNP-SEV Alexey Kardashevskiy
2025-02-18 11:09 ` [RFC PATCH v2 03/22] PCI/IDE: Init IDs on all IDE streams beforehand Alexey Kardashevskiy
2025-02-18 11:09 ` [RFC PATCH v2 04/22] iommu/amd: Report SEV-TIO support Alexey Kardashevskiy
2025-02-18 11:09 ` [RFC PATCH v2 05/22] crypto: ccp: Enable SEV-TIO feature in the PSP when supported Alexey Kardashevskiy
2025-03-22 11:50 ` Francesco Lavra
2025-03-26 4:26 ` Alexey Kardashevskiy
2025-02-18 11:09 ` [RFC PATCH v2 06/22] KVM: X86: Define tsm_get_vmid Alexey Kardashevskiy
2025-03-13 1:51 ` Dan Williams
2025-03-13 4:31 ` Alexey Kardashevskiy
2025-03-13 19:09 ` Dan Williams
2025-03-14 3:28 ` Alexey Kardashevskiy
2025-04-24 3:37 ` Alexey Kardashevskiy
2025-02-18 11:09 ` [RFC PATCH v2 07/22] coco/tsm: Add tsm and tsm-host modules Alexey Kardashevskiy
2025-03-14 1:14 ` Dan Williams
2025-05-14 18:39 ` Zhi Wang
2025-05-29 5:30 ` Alexey Kardashevskiy
2025-02-18 11:09 ` [RFC PATCH v2 08/22] pci/tsm: Add PCI driver for TSM Alexey Kardashevskiy
2025-04-15 20:25 ` Bjorn Helgaas
2025-02-18 11:09 ` [RFC PATCH v2 09/22] crypto/ccp: Implement SEV TIO firmware interface Alexey Kardashevskiy
2025-03-23 11:35 ` Francesco Lavra
2025-02-18 11:09 ` [RFC PATCH v2 10/22] KVM: SVM: Add uAPI to change RMP for MMIO Alexey Kardashevskiy
2025-03-15 0:08 ` Dan Williams
2025-03-27 5:00 ` Alexey Kardashevskiy
2025-02-18 11:09 ` [RFC PATCH v2 11/22] KVM: SEV: Add TIO VMGEXIT Alexey Kardashevskiy
2025-02-18 11:09 ` [RFC PATCH v2 12/22] iommufd: Allow mapping from guest_memfd Alexey Kardashevskiy
2025-02-18 14:16 ` Jason Gunthorpe
2025-02-18 23:35 ` Alexey Kardashevskiy
2025-02-18 23:51 ` Jason Gunthorpe
2025-02-19 0:43 ` Alexey Kardashevskiy
2025-02-19 13:35 ` Jason Gunthorpe
2025-02-19 20:23 ` Michael Roth
2025-02-19 20:37 ` Jason Gunthorpe
2025-02-19 21:30 ` Michael Roth
2025-02-20 0:57 ` Jason Gunthorpe
2025-03-13 4:51 ` Alexey Kardashevskiy
2025-03-19 17:40 ` Jason Gunthorpe
2025-02-20 2:29 ` Alexey Kardashevskiy
2025-02-18 11:10 ` [RFC PATCH v2 13/22] iommufd: amd-iommu: Add vdevice support Alexey Kardashevskiy
2025-04-01 16:11 ` Jason Gunthorpe
2025-04-10 6:39 ` Alexey Kardashevskiy
2025-04-10 8:43 ` Tian, Kevin
2025-04-10 13:05 ` Jason Gunthorpe
2025-04-14 4:17 ` Alexey Kardashevskiy
2025-02-18 11:10 ` [RFC PATCH v2 14/22] iommufd: Add TIO calls Alexey Kardashevskiy
2025-02-25 9:00 ` Xu Yilun
2025-02-26 0:12 ` Alexey Kardashevskiy
2025-02-26 10:49 ` Xu Yilun
2025-02-26 13:12 ` Jason Gunthorpe
2025-02-27 0:33 ` Alexey Kardashevskiy
2025-03-01 0:32 ` Jason Gunthorpe
2025-03-05 3:09 ` Alexey Kardashevskiy
2025-03-05 19:18 ` Jason Gunthorpe
2025-02-27 3:59 ` Xu Yilun
2025-03-01 0:37 ` Jason Gunthorpe
2025-03-03 5:32 ` Xu Yilun
2025-03-05 19:28 ` Jason Gunthorpe
2025-03-06 6:47 ` Xu Yilun
2025-03-06 18:26 ` Jason Gunthorpe
2025-03-07 6:49 ` Xu Yilun
2025-03-07 2:19 ` Alexey Kardashevskiy
2025-03-07 15:17 ` Jason Gunthorpe
2025-03-12 10:41 ` Suzuki K Poulose
2025-03-12 1:11 ` Xu Yilun
2025-02-26 13:08 ` Jason Gunthorpe
2025-03-15 1:11 ` Dan Williams
2025-03-17 2:32 ` Alexey Kardashevskiy
2025-04-01 15:53 ` Jason Gunthorpe [this message]
2025-03-13 11:01 ` Xu Yilun
2025-03-14 2:49 ` Alexey Kardashevskiy
2025-03-28 5:27 ` Aneesh Kumar K.V
2025-04-01 16:03 ` Jason Gunthorpe
2025-04-07 11:40 ` Aneesh Kumar K.V
2025-04-07 16:40 ` Jason Gunthorpe
2025-04-01 16:12 ` Jason Gunthorpe
2025-04-03 8:39 ` Alexey Kardashevskiy
2025-02-18 11:10 ` [RFC PATCH v2 15/22] KVM: X86: Handle private MMIO as shared Alexey Kardashevskiy
2025-05-15 8:18 ` Zhi Wang
2025-05-29 5:30 ` Alexey Kardashevskiy
2025-02-18 11:10 ` [RFC PATCH v2 16/22] coco/tsm: Add tsm-guest module Alexey Kardashevskiy
2025-04-05 17:15 ` Francesco Lavra
2025-02-18 11:10 ` [RFC PATCH v2 17/22] resource: Mark encrypted MMIO resource on validation Alexey Kardashevskiy
2025-04-05 18:19 ` Francesco Lavra
2025-02-18 11:10 ` [RFC PATCH v2 18/22] coco/sev-guest: Implement the guest support for SEV TIO Alexey Kardashevskiy
2025-04-07 11:05 ` Francesco Lavra
2025-02-18 11:10 ` [RFC PATCH v2 19/22] RFC: pci: Add BUS_NOTIFY_PCI_BUS_MASTER event Alexey Kardashevskiy
2025-04-15 20:26 ` Bjorn Helgaas
2025-02-18 11:10 ` [RFC PATCH v2 20/22] sev-guest: Stop changing encrypted page state for TDISP devices Alexey Kardashevskiy
2025-02-27 16:01 ` Borislav Petkov
2025-02-18 11:10 ` [RFC PATCH v2 21/22] pci: Allow encrypted MMIO mapping via sysfs Alexey Kardashevskiy
2025-04-15 20:28 ` Bjorn Helgaas
2025-02-18 11:10 ` [RFC PATCH v2 22/22] pci: Define pci_iomap_range_encrypted Alexey Kardashevskiy
2025-04-15 20:30 ` Bjorn Helgaas
2025-02-27 15:48 ` [RFC PATCH v2 00/22] TSM: Secure VFIO, TDISP, SEV TIO Borislav Petkov
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