Changes in sysfs-bus-pci

f4b369c6fe0ceaba2da2daff8c9eb415f85926dd - Merge branch 'next' into for-linus

Mon, 20 Apr 2026 03:28:57 +0200

Merge branch 'next' into for-linusPrepare input updates for 7.1 merge window. List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

0421ccdfad0d92713a812a5aeb7d07b0ea7213c8 - Merge tag 'v7.0-rc3' into next

Thu, 12 Mar 2026 18:44:42 +0100

Merge tag 'v7.0-rc3' into nextSync up with the mainline to brig up the latest changes, specificallychanges to ALPS driver. List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

ec496f77b4c11036cc835d6f045fb5e5ef1e6530 - Merge branch 'for-6.20/sony' into for-linus

Mon, 09 Feb 2026 17:33:26 +0100

Merge branch 'for-6.20/sony' into for-linus- Support for Rock band 4 PS4 and PS5 guitars (Rosalie Wanders) List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

cc4adab164b772a34b3340d644b7c4728498581e - Merge tag 'v6.19-rc1' into msm-next

Tue, 20 Jan 2026 23:06:55 +0100

Merge tag 'v6.19-rc1' into msm-nextMerge Linux 6.19-rc1 in order to catch up with other changes (e.g. UBWCconfig database defining UBWC_6).Signed-off-by: Dmitry Baryshkov List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

5add3c3c280a35f7e258e9cef7607db5a2e56fdc - Merge drm/drm-next into drm-xe-next

Fri, 19 Dec 2025 11:51:22 +0100

Merge drm/drm-next into drm-xe-nextBackmerging to bring in 6.19-rc1. An important upstream bugfix andto help unblock PTL CI.Signed-off-by: Thomas Hellström List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

ec439c38013550420aecc15988ae6acb670838c1 - Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after 6.19-rc1

Wed, 17 Dec 2025 06:29:38 +0100

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after 6.19-rc1Cross-merge BPF and other fixes after downstream PR.Signed-off-by: Alexei Starovoitov List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

b8304863a3990d0f18c38e5b94191830a63ee1af - Merge drm/drm-next into drm-intel-next

Mon, 15 Dec 2025 14:24:02 +0100

Merge drm/drm-next into drm-intel-nextSync-up some display code needed for Async flips refactor.Signed-off-by: Rodrigo Vivi List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

7f790dd21a931c61167f7bdc327aecf2cebad327 - Merge drm/drm-next into drm-misc-next

Mon, 15 Dec 2025 09:27:39 +0100

Merge drm/drm-next into drm-misc-nextLet's kickstart the v6.20 (7.0?) release cycle.Signed-off-by: Maxime Ripard List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

a4a508df2aa34f8650afde54ea804321c618f45f - Merge tag 'v6.18' into next

Sat, 13 Dec 2025 10:18:20 +0100

Merge tag 'v6.18' into nextSync up with the mainline to bring in the latest APIs. List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

24f171c7e145f43b9f187578e89b0982ce87e54c - Merge tag 'asoc-fix-v6.19-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

Sun, 21 Dec 2025 11:11:11 +0100

Merge tag 'asoc-fix-v6.19-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linusASoC: Fixes for v6.19We've been quite busy with fixes since the merge window, though not inany particularly exciting ways - the standout thing is the fix for _SXcontrols which were broken by a change to how we do clamping, otherwiseit's all fairly run of the mill fixes and quirks. List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

84318277d6334c6981ab326d4acc87c6a6ddc9b8 - Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes

Mon, 15 Dec 2025 12:53:27 +0100

Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixesPull in rc1 to include all changes since the merge window closed,and grab all fixes and changes from drm/drm-next.Signed-off-by: Maarten Lankhorst List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

249872f53d64441690927853e9d3af36394802d5 - Merge tag 'tsm-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsm

Sat, 06 Dec 2025 19:15:41 +0100

Merge tag 'tsm-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsmPull PCIe Link Encryption and Device Authentication from Dan Williams: "New PCI infrastructure and one architecture implementation for PCIe link encryption establishment via platform firmware services. This work is the result of multiple vendors coming to consensus on some core infrastructure (thanks Alexey, Yilun, and Aneesh!), and three vendor implementations, although only one is included in this pull. The PCI core changes have an ack from Bjorn, the crypto/ccp/ changes have an ack from Tom, and the iommu/amd/ changes have an ack from Joerg. PCIe link encryption is made possible by the soup of acronyms mentioned in the shortlog below. Link Integrity and Data Encryption (IDE) is a protocol for installing keys in the transmitter and receiver at each end of a link. That protocol is transported over Data Object Exchange (DOE) mailboxes using PCI configuration requests. The aspect that makes this a "platform firmware service" is that the key provisioning and protocol is coordinated through a Trusted Execution Envrionment (TEE) Security Manager (TSM). That is either firmware running in a coprocessor (AMD SEV-TIO), or quasi-hypervisor software (Intel TDX Connect / ARM CCA) running in a protected CPU mode. Now, the only reason to ask a TSM to run this protocol and install the keys rather than have a Linux driver do the same is so that later, a confidential VM can ask the TSM directly "can you certify this device?". That precludes host Linux from provisioning its own keys, because host Linux is outside the trust domain for the VM. It also turns out that all architectures, save for one, do not publish a mechanism for an OS to establish keys in the root port. So "TSM-established link encryption" is the only cross-architecture path for this capability for the foreseeable future. This unblocks the other arch implementations to follow in v6.20/v7.0, once they clear some other dependencies, and it unblocks the next phase of work to implement the end-to-end flow of confidential device assignment. The PCIe specification calls this end-to-end flow Trusted Execution Environment (TEE) Device Interface Security Protocol (TDISP). In the meantime, Linux gets a link encryption facility which has practical benefits along the same lines as memory encryption. It authenticates devices via certificates and may protect against interposer attacks trying to capture clear-text PCIe traffic. Summary: - Introduce the PCI/TSM core for the coordination of device authentication, link encryption and establishment (IDE), and later management of the device security operational states (TDISP). Notify the new TSM core layer of PCI device arrival and departure - Add a low level TSM driver for the link encryption establishment capabilities of the AMD SEV-TIO architecture - Add a library of helpers TSM drivers to use for IDE establishment and the DOE transport - Add skeleton support for 'bind' and 'guest_request' operations in support of TDISP"* tag 'tsm-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsm: (23 commits) crypto/ccp: Fix CONFIG_PCI=n build virt: Fix Kconfig warning when selecting TSM without VIRT_DRIVERS crypto/ccp: Implement SEV-TIO PCIe IDE (phase1) iommu/amd: Report SEV-TIO support psp-sev: Assign numbers to all status codes and add new ccp: Make snp_reclaim_pages and __sev_do_cmd_locked public PCI/TSM: Add 'dsm' and 'bound' attributes for dependent functions PCI/TSM: Add pci_tsm_guest_req() for managing TDIs PCI/TSM: Add pci_tsm_bind() helper for instantiating TDIs PCI/IDE: Initialize an ID for all IDE streams PCI/IDE: Add Address Association Register setup for downstream MMIO resource: Introduce resource_assigned() for discerning active resources PCI/TSM: Drop stub for pci_tsm_doe_transfer() drivers/virt: Drop VIRT_DRIVERS build dependency PCI/TSM: Report active IDE streams PCI/IDE: Report available IDE streams PCI/IDE: Add IDE establishment helpers PCI: Establish document for PCI host bridge sysfs attributes PCI: Add PCIe Device 3 Extended Capability enumeration PCI/TSM: Establish Secure Sessions and Link Encryption ... List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

f7ae6d4ec6520a901787cbab273983e96d8516da - PCI/TSM: Add 'dsm' and 'bound' attributes for dependent functions

Thu, 13 Nov 2025 03:14:46 +0100

PCI/TSM: Add 'dsm' and 'bound' attributes for dependent functionsPCI/TSM sysfs for physical function 0 devices, i.e. the "DSM" (DeviceSecurity Manager), contains the 'connect' and 'disconnect' attributes.After a successful 'connect' operation the DSM, its dependent functions(SR-IOV virtual functions, non-zero multi-functions, or downstreamendpoints of a switch DSM) are candidates for being transitioned into aTDISP (TEE Device Interface Security Protocol) operational state, viapci_tsm_bind(). At present sysfs is blind to which devices are capable ofTDISP operation and it is ambiguous which functions are serviced by whichDSMs.Add a 'dsm' attribute to identify a function's DSM device, and add a'bound' attribute to identify when a function has entered a TDISPoperational state.Cc: Bjorn Helgaas Cc: Lukas Wunner Cc: Samuel Ortiz Cc: Alexey Kardashevskiy Cc: Xu Yilun Cc: Suzuki K Poulose Cc: Aneesh Kumar K.V Reviewed-by: Jonathan Cameron Link: https://patch.msgid.link/20251113021446.436830-9-dan.j.williams@intel.comSigned-off-by: Dan Williams List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

3225f52cde56f46789a4972d3c54df8a4d75f022 - PCI/TSM: Establish Secure Sessions and Link Encryption

Fri, 31 Oct 2025 22:28:56 +0100

PCI/TSM: Establish Secure Sessions and Link EncryptionThe PCIe 7.0 specification, section 11, defines the Trusted ExecutionEnvironment (TEE) Device Interface Security Protocol (TDISP). Thisprotocol definition builds upon Component Measurement and Authentication(CMA), and link Integrity and Data Encryption (IDE). It adds support forassigning devices (PCI physical or virtual function) to a confidential VMsuch that the assigned device is enabled to access guest private memoryprotected by technologies like Intel TDX, AMD SEV-SNP, RISCV COVE, or ARMCCA.The "TSM" (TEE Security Manager) is a concept in the TDISP specificationof an agent that mediates between a "DSM" (Device Security Manager) andsystem software in both a VMM and a confidential VM. A VMM uses TSM ABIsto setup link security and assign devices. A confidential VM uses TSMABIs to transition an assigned device into the TDISP "RUN" state andvalidate its configuration. From a Linux perspective the TSM abstractsmany of the details of TDISP, IDE, and CMA. Some of those details leakthrough at times, but for the most part TDISP is an internalimplementation detail of the TSM.CONFIG_PCI_TSM adds an "authenticated" attribute and "tsm/" subdirectoryto pci-sysfs. Consider that the TSM driver may itself be a PCI driver.Userspace can watch for the arrival of a "TSM" device,/sys/class/tsm/tsm0/uevent KOBJ_CHANGE, to know when the PCI core hasinitialized TSM services.The operations that can be executed against a PCI device are split intotwo mutually exclusive operation sets, "Link" and "Security" (structpci_tsm_{link,security}_ops). The "Link" operations manage physical linksecurity properties and communication with the device's Device SecurityManager firmware. These are the host side operations in TDISP. The"Security" operations coordinate the security state of the assignedvirtual device (TDI). These are the guest side operations in TDISP.Only "link" (Secure Session and physical Link Encryption) operations aredefined at this stage. There are placeholders for the device security(Trusted Computing Base entry / exit) operations.The locking allows for multiple devices to be executing commandssimultaneously, one outstanding command per-device and an rwsemsynchronizes the implementation relative to TSM registration/unregistrationevents.Thanks to Wu Hao for his work on an early draft of this support.Cc: Lukas Wunner Cc: Samuel Ortiz Acked-by: Bjorn Helgaas Reviewed-by: Jonathan Cameron Reviewed-by: Alexey Kardashevskiy Co-developed-by: Xu Yilun Signed-off-by: Xu Yilun Link: https://patch.msgid.link/20251031212902.2256310-5-dan.j.williams@intel.comSigned-off-by: Dan Williams List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

7362b5b493102c6b71827c2da22117b475528f6d - Merge branch 'for-6.19/nintendo' into for-linus

Tue, 02 Dec 2025 14:46:11 +0100

Merge branch 'for-6.19/nintendo' into for-linus- switch to WQ_PERCPU workaueues (Marco Crivellari)- reduce potential initialization blocking time of hid-nintendo (Willy Huang) List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

cb9f145f638d7afa633632a9290d6ad06caeb8ee - Merge remote-tracking branch 'drm/drm-next' into msm-next-robclark

Sat, 01 Nov 2025 13:47:30 +0100

Merge remote-tracking branch 'drm/drm-next' into msm-next-robclarkBack-merge drm-next to get caught up.Signed-off-by: Rob Clark List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

82ee50252dc891e3f3b32d923bb4f656d300b772 - Merge drm/drm-next into drm-xe-next

Tue, 14 Oct 2025 11:31:49 +0200

Merge drm/drm-next into drm-xe-nextBackmerging to bring in 6.18-rc1.Signed-off-by: Thomas Hellström List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

2acee98fcc61052d63fab4539fcb6ee677555645 - Merge drm/drm-next into drm-intel-next

Tue, 14 Oct 2025 09:37:11 +0200

Merge drm/drm-next into drm-intel-nextSync to v6.18-rc1.Signed-off-by: Jani Nikula List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

9b966ae42235a88eaea714be09ff3d698535bdfe - Merge drm/drm-next into drm-misc-next

Mon, 13 Oct 2025 09:19:19 +0200

Merge drm/drm-next into drm-misc-nextUpdating drm-misc-next to the state of v6.18-rc1.Signed-off-by: Thomas Zimmermann List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci

39e9d5f63075f4d54e3b59b8238478c32af92755 - Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf before 6.18-rc1

Sun, 12 Oct 2025 03:27:47 +0200

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf before 6.18-rc1Cross-merge BPF and other fixes after downstream PR.No conflicts.Signed-off-by: Alexei Starovoitov List of files: /linux/Documentation/ABI/testing/sysfs-bus-pci