Merge drm/drm-fixes into drm-misc-fixes

Let's start the 7.3 drm-misc-fixes cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>

Merge tag 'pci-v7.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull PCI updates from Bjorn Helgaas:
"Resource management:

- Add hotplug reservation only once (not at each

Merge tag 'pci-v7.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull PCI updates from Bjorn Helgaas:
"Resource management:

- Add hotplug reservation only once (not at each level of the
hierarchy) so bridge windows don't grow more than necessary (Ilpo
Järvinen)

Driver binding:

- Rework device matching so device ID lifetime only needs to cover
the probe path since dynamic IDs can be removed at any time (Gary
Guo)

Error handling:

- Update mappings of AER errors to agent & layer and log them for
each individual error when multiple errors detected (Lukas Wunner)

- Log Error Source only once, not twice in separate messages (Lukas
Wunner)

- Emit TLP Log only for unmasked errors (Lukas Wunner)

- Support Advisory Non-Fatal Errors (Lukas Wunner)

- Allow DPC on all Downstream Ports, not just Root Ports, when OS
controls AER (Darshit Shah)

ASPM:

- Program the same ASPM Control values for every function of
multi-function devices, as recommended by the PCIe spec (Krishna
Chaitanya Chundru)

- Avoid L0s for Realtek RTS525A, where it causes an AER interrupt
storm (Max Lee)

- Avoid ASPM L0s, L1, and L1 PM Substates based on 'aspm-no-l0s',
'aspm-no-l1' [1], and 'aspm-no-l1ss' DT properties (Krishna
Chaitanya Chundru)

Power management:

- Allow D3 for native hotplug-capable Root Ports on non-x86 platforms
(we avoid D3 for these ports on x86 because some old platforms
didn't validate it) (Manivannan Sadhasivam)

- Allow portdrv to claim Ports even if they don't support services
(AER, PME, DPC, hotplug, etc) so it can do power management (Brian
Norris)

Power control:

- Add support for PCIe WAKE# interrupt when described via DT (Krishna
Chaitanya Chundru)

- For the TC9563 PCIe switch:

- Take a reference on the I2C adapter to avoid uninterruptible
hang when unloading an I2C module while in-use (Johan Hovold)

- Update DT binding and driver to restrict Tx Amplitude, DFE and
N_FTS to USP, DSP1 and DSP2 (Manivannan Sadhasivam)

- Power off only external-facing ports (DSP1, DSP2), leaving USP
and DSP3 (aka VDSP) powered up (Manivannan Sadhasivam)

- Move integrated MAC Endpoint out of the list of internal ports
and configure it separately (Manivannan Sadhasivam)

Virtualization:

- Add ACS quirk for Pericom PI7C9X2G608 switches (Tim Harvey)

- Fix a long-standing bug in the Intel PCH Root Port MPC ACS quirk
that didn't update the intended INTEL_MPC_REG_IRBNCE bit because it
used a 16-bit config write when a 32-bit write was intended
(Mohamad Raizudeen)

Procfs:

- Avoid spurious runtime PM wakeup on config space accesses that are
outside config space and fail before reaching PCI (Krzysztof
Wilczyński)

- Warn on user-space writes to kernel-exclusive config space regions,
as we already do for sysfs (Krzysztof Wilczyński)

- Check credentials of opener, not reader, for config space reads, as
we already do for sysfs (Krzysztof Wilczyński)

Sysfs:

- In pci_write_legacy_io(), avoid out-of-bounds reads from the user
buffer and fix incorrect ioport write data (1-byte writes on
little-endian powerpc, 2- and 4-byte writes on big-endian powerpc)
(Krzysztof Wilczyński)

- In pci_read_legacy_io(), fix incorrect ioport read data for 2- and
4-byte reads on big-endian powerpc (Krzysztof Wilczyński)

- Fix I/O port accessor argument order in Alpha pci_legacy_write()
(Krzysztof Wilczyński)

- Avoid spurious runtime PM wakeup on config space accesses that are
outside config space and fail before reaching PCI (Krzysztof
Wilczyński)

- Return -EINVAL, not -ENODEV, for mmap of I/O BAR that fails because
the arch doesn't support it, as we do for procfs (Krzysztof
Wilczyński)

- Check for LOCKDOWN_PCI_ACCESS for legacy_io and legacy_mem, as we
do for other config space accessors (Krzysztof Wilczyński)

Peer-to-peer DMA:

- Add Nvidia Vera Rubin to list of platforms that support P2PDMA
(Leon Romanovsky)

Endpoint framework:

- Check doorbell SUCCESS bit in pci_endpoint_test to avoid treating
some failures as successes (Niklas Cassel)

- Fail doorbell test when the trigger IRQ is missed (Niklas Cassel)

New native PCIe controller drivers:

- Add DT binding and driver for NVIDIA Tegra264 (Thierry Reding)

Native PCIe controllers:

- Use common wait time definitions for PCIe link monitoring instead
of defining driver-private duplicates (Thierry Reding)

Generic host bridge driver:

- Fix NULL pointer dereference that caused enumeration failures on
32-bit CAM systems (Steffen Persvold)

Amlogic Meson PCIe controller driver:

- Correct the PERST# GPIO state so it remains asserted until power
and REFCLK become stable to fix enumeration failure (Ronald
Claveau)

ASPEED PCIe controller driver:

- Switch to irq_domain_create_linear() so we can obsolete
irq_domain_add_linear() (Jiri Slaby)

Cadence PCIe controller driver:

- Add MODULE_DEVICE_TABLE to generate module aliases for OF-based
module autoloading (Pengpeng Hou)

- Add debugfs 'ltssm_status' file for LGA- and HPA-based Cadence
controllers (Hans Zhang)

- Support up to x4 (not x2) lanes for J200 (Takuma Fujiwara)

- Fix host/endpoint dependencies for cadence-plat driver to fix link
error when cadence-plat is built-in but the host or endpoint driver
is modular (Aksh Garg)

Freescale i.MX6 PCIe controller driver:

- Add imx6 intr/aer/pme interrupt lines for i.MX95 (Richard Zhu)

- Remove PERST# checking from pci_host_common_parse_port() so callers
can decide whether to fall back to legacy DT binding with PERST# in
the host bridge (Sherry Sun)

- Fix build issues when PCI_PWRCTRL_GENERIC or PCI_HOST_COMMON is a
module (Arnd Bergmann)

- Create pwrctrl devices only once by doing it from imx_pcie_probe()
instead of imx_pcie_host_init(), which is used during both probe
and resume (Sherry Sun)

- Use 'dw_pcie_rp->skip_pwrctrl_off' to avoid powering off devices
during suspend to preserve wakeup capability (Sherry Sun)

- Add runtime PM support for i.MX95 to allow dynamic power management
when the link is idle (Richard Zhu)

Intel VMD host bridge driver:

- Support device ID 0x28C1 and assume that BIOS has already
enumerated the hierarchy below VMD and stored bus range info for OS
to use (Nirmal Patel)

- Add support for VMCONFIG BUS_RESTRICT_CFG=3, which makes it
possible to enumerate downstream devices on Intel Arrow Lake-HX
systems and probably others (Ali Alaei)

- Pay attention to _OSC negotiation for VMD hierarchy only when
running on bare metal, not when running in a VM (Nirmal Patel)

- Add Nova Lake (NVL) and Dunlow (DNL) Device IDs (Szymon Durawa)

MediaTek PCIe controller driver:

- Add support for PCIe controller in EcoNet EN7528 and EN751221 SoCs
(Caleb James DeLisle)

MediaTek PCIe Gen3 controller driver:

- Add mediatek-gen3 'memory-region' for restricted DMA buffer
(Chen-Yu Tsai)

NVIDIA Tegra264 PCIe controller driver:

- Distinguish Tegra264 C0 PCIe controller for internal GPU from C1-C5
controllers so the unit address matches the first 'reg' entry
(Thierry Reding)

- Add Tegra264 Root Port stanzas to prepare for generic WAKE#
handling (Thierry Reding)

Qualcomm PCIe controller driver:

- Add IPQ9650 compatible with global interrupt (Kathiravan
Thirumoorthy)

- Add IPQ5210 compatible with IPQ9574 fallback (Varadarajan
Narayanan)

- Add DT binding and driver support for Hawi SoC (Matthew Leung)

- Skip PERST# GPIOs provided by downstream PCIe devices, which should
be handled by drivers of those devices (Manivannan Sadhasivam)

- Stop advertising Attention Button Present (no Qcom SoCs support
Attention Buttons) so pciehp can use Presence Detect Changed events
(Qiang Yu)

Renesas R-Car PCIe controller driver:

- Add rcar-gen4-pci-host optional 'msi-parent' for GIT ITS (Marek
Vasut)

- When MSI is enabled but iMSI-RX is not used, configure AXIINTC to
allow GIT ITS to handle MSI (Marek Vasut)

- Refactor GIC600 implementation to make it easier to add platforms
that only support 32-bit addressing (Marek Vasut)

- Add Renesas R-Car Gen4 S4/V4H/V4M to the list of GIC600
integrations that only support 32-bit addressing (Marek Vasut)

Renesas RZ/G3S PCIe controller driver:

- Add DT binding and driver support for RZ/V2H(P) SoC, which contains
two PCIe controllers, configured either as a single x4 link or two
independent x2 link controllers (Lad Prabhakar)

SpacemiT K1 PCIe controller driver:

- Add missing MODULE_DEVICE_TABLE() to generate module alias info for
OF-based module autoloading (Pengpeng Hou)

StarFive PCIe controller driver:

- Fix resource leaks on error paths in host_init() (Ali Tariq)

- Fix runtime PM handling and teardown ordering to avoid register
access while power or clocks are disabled (Ali Tariq)

- Check for runtime PM resume failure to avoid register access while
power or clocks are disabled (Ali Tariq)

Synopsys DesignWare PCIe controller driver:

- Add LECARC PMU IDs to the DWC RAS/DES VSEC list so it can take
advantage of the existing debugfs support for silicon debug, error
injection, and event counters (Brett Zhou)

- Factor pcie_valid_speed() and pci_bus_speed2lnkctl2() out of bwctrl
so they can be shared by the DWC core (Hans Zhang)

- Flush MSI writes from endpoint before unmapping the iATU, as we
already do for MSI-X writes (Niklas Cassel)

- Unmap MSI iATU window before mapping MSI-X window, to avoid a
subsequent MSI write using a disabled aperture and losing the
interrupt (Niklas Cassel)

- Change endpoint .pre_init() and .init() callbacks to return errors
and handle them (Marek Vasut)

UltraRISC PCIe controller driver:

- Add 'core', 'dbi', and 'aux' clocks to DT binding and manage them
in the driver (Jia Wang)

- Use module_platform_driver() since this may be built as a module,
though not removable because IRQs can't be safely disposed (Jia
Wang)

MicroSemi Switchtec management driver:

- Add Microchip PCI1008 device ID and include it in NTB DMA alias
quirk (Logan Gunthorpe)

Miscellaneous:

- Document how to write PCI Host Controller drivers (Manivannan
Sadhasivam)

- Fix typos in documentation (D'Orus Tsitera)

- Use %pe format specifier to print error pointers so we get symbolic
errname when available (Krzysztof Wilczyński)"

* tag 'pci-v7.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (124 commits)
PCI: vmd: Add Nova Lake (NVL) and Dunlow (DNL) Device IDs
PCI: tegra264: Add Tegra264 support
dt-bindings: PCI: tegra264: Switch to PCIe Root Port bindings
dt-bindings: PCI: tegra264: Strictly distinguish C0 from C1-C5
PCI/AER: Support Advisory Non-Fatal Errors
PCI: Fix 32-bit config write in Intel PCH Root Port MPC ACS quirk
PCI: dwc: Handle return value from endpoint .pre_init callback
PCI: dwc: Handle return value from endpoint .init callback
PCI: dwc: Add PCI ID for LECARC PCIe PMU
PCI/ASPM: Mask ASPM states based on Devicetree properties
PCI/ASPM: Disable/restore ASPM on every function for multi-function devices
Documentation: PCI: Document how to write PCI Host Controller drivers
PCI/ASPM: Use pcie_capability_clear_and_set_word() for ASPM disable/restore
PCI: Add support for PCIe WAKE# interrupt
PCI: Allow D3 for native hotplug-capable Root Ports on non-x86 platforms
dt-bindings: PCI: Correct white-space style
PCI/ASPM: Avoid L0s for Realtek RTS525A
PCI: ultrarisc: Use module_platform_driver()
PCI: ultrarisc: Get and enable DP1000 PCIe controller clocks
dt-bindings: PCI: ultrarisc: Add required DP1000 PCIe clocks
...

show more ...

Merge branch 'pci/misc'

- Fix typos in documentation (D'Orus Tsitera)

- Use %pe format specifier to print error pointers so we get symbolic
errname when available (Krzysztof Wilczyński)

* pci/mi

Merge branch 'pci/misc'

- Fix typos in documentation (D'Orus Tsitera)

- Use %pe format specifier to print error pointers so we get symbolic
errname when available (Krzysztof Wilczyński)

* pci/misc:
PCI: Use %pe format specifier to print error pointers
Documentation: PCI: Fix sysfs-bus-pci typo

show more ...

Documentation: PCI: Fix sysfs-bus-pci typo

Replace "similiar" with "similar" in
Documentation/ABI/testing/sysfs-bus-pci.

Signed-off-by: D'Orus Tsitera <dorustsitera@gmail.com>
Signed-off-by: Bjorn

Documentation: PCI: Fix sysfs-bus-pci typo

Replace "similiar" with "similar" in
Documentation/ABI/testing/sysfs-bus-pci.

Signed-off-by: D'Orus Tsitera <dorustsitera@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260713-docs-fix-similiar-v1-1-257e25150346@gmail.com

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Merge drm/drm-next into drm-intel-gt-next

Backmerging to pull in commit 5401b9adebc9 ("i915: don't use
a vma that didn't match the context VM") to revert it.

Signed-off-by: Joonas Lahtinen <joonas.

Merge drm/drm-next into drm-intel-gt-next

Backmerging to pull in commit 5401b9adebc9 ("i915: don't use
a vma that didn't match the context VM") to revert it.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

show more ...

Merge branch 'next' into for-linus

Prepare input updates for 7.1 merge window.

Merge tag 'v7.0-rc3' into next

Sync up with the mainline to brig up the latest changes, specifically
changes to ALPS driver.

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

- Support for Rock band 4 PS4 and PS5 guitars (Rosalie Wanders)

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

Merge Linux 6.19-rc1 in order to catch up with other changes (e.g. UBWC
config database defining UBWC_6).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.q

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

Merge Linux 6.19-rc1 in order to catch up with other changes (e.g. UBWC
config database defining UBWC_6).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

show more ...

Merge drm/drm-next into drm-xe-next

Backmerging to bring in 6.19-rc1. An important upstream bugfix and
to help unblock PTL CI.

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

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

Cross-merge BPF and other fixes after downstream PR.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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

Sync-up some display code needed for Async flips refactor.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge drm/drm-next into drm-misc-next

Let's kickstart the v6.20 (7.0?) release cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>

Merge tag 'v6.18' into next

Sync up with the mainline to bring in the latest APIs.

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

ASoC: Fixes for v6.19

We've been quite busy with fixes since the merge window, though

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

ASoC: Fixes for v6.19

We've been quite busy with fixes since the merge window, though not in
any particularly exciting ways - the standout thing is the fix for _SX
controls which were broken by a change to how we do clamping, otherwise
it's all fairly run of the mill fixes and quirks.

show more ...

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

Pull in rc1 to include all changes since the merge window closed,
and grab all fixes and changes from drm/drm-next.

Signed-off-by: M

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

Pull 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 <dev@lankhorst.se>

show more ...

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

Pull PCIe Link Encryption and Device Authentication from Dan Williams:
"New PCI infrastructure and one architect

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

Pull 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
...

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

PCI/TSM sysfs for physical function 0 devices, i.e. the "DSM" (Device
Security Manager), contains the 'connect' and 'disconnect' att

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

PCI/TSM sysfs for physical function 0 devices, i.e. the "DSM" (Device
Security 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 downstream
endpoints of a switch DSM) are candidates for being transitioned into a
TDISP (TEE Device Interface Security Protocol) operational state, via
pci_tsm_bind(). At present sysfs is blind to which devices are capable of
TDISP operation and it is ambiguous which functions are serviced by which
DSMs.

Add a 'dsm' attribute to identify a function's DSM device, and add a
'bound' attribute to identify when a function has entered a TDISP
operational state.

Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Samuel Ortiz <sameo@rivosinc.com>
Cc: Alexey Kardashevskiy <aik@amd.com>
Cc: Xu Yilun <yilun.xu@linux.intel.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@kernel.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Link: https://patch.msgid.link/20251113021446.436830-9-dan.j.williams@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

show more ...

PCI/TSM: Establish Secure Sessions and Link Encryption

The PCIe 7.0 specification, section 11, defines the Trusted Execution
Environment (TEE) Device Interface Security Protocol (TDISP). This
proto

PCI/TSM: Establish Secure Sessions and Link Encryption

The PCIe 7.0 specification, section 11, defines the Trusted Execution
Environment (TEE) Device Interface Security Protocol (TDISP). This
protocol definition builds upon Component Measurement and Authentication
(CMA), and link Integrity and Data Encryption (IDE). It adds support for
assigning devices (PCI physical or virtual function) to a confidential VM
such that the assigned device is enabled to access guest private memory
protected by technologies like Intel TDX, AMD SEV-SNP, RISCV COVE, or ARM
CCA.

The "TSM" (TEE Security Manager) is a concept in the TDISP specification
of an agent that mediates between a "DSM" (Device Security Manager) and
system software in both a VMM and a confidential VM. A VMM uses TSM ABIs
to setup link security and assign devices. A confidential VM uses TSM
ABIs to transition an assigned device into the TDISP "RUN" state and
validate its configuration. From a Linux perspective the TSM abstracts
many of the details of TDISP, IDE, and CMA. Some of those details leak
through at times, but for the most part TDISP is an internal
implementation detail of the TSM.

CONFIG_PCI_TSM adds an "authenticated" attribute and "tsm/" subdirectory
to 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 has
initialized TSM services.

The operations that can be executed against a PCI device are split into
two mutually exclusive operation sets, "Link" and "Security" (struct
pci_tsm_{link,security}_ops). The "Link" operations manage physical link
security properties and communication with the device's Device Security
Manager firmware. These are the host side operations in TDISP. The
"Security" operations coordinate the security state of the assigned
virtual device (TDI). These are the guest side operations in TDISP.

Only "link" (Secure Session and physical Link Encryption) operations are
defined 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 commands
simultaneously, one outstanding command per-device and an rwsem
synchronizes the implementation relative to TSM registration/unregistration
events.

Thanks to Wu Hao for his work on an early draft of this support.

Cc: Lukas Wunner <lukas@wunner.de>
Cc: Samuel Ortiz <sameo@rivosinc.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Alexey Kardashevskiy <aik@amd.com>
Co-developed-by: Xu Yilun <yilun.xu@linux.intel.com>
Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>
Link: https://patch.msgid.link/20251031212902.2256310-5-dan.j.williams@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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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)

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

Back-merge drm-next to get caught up.

Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>

Merge drm/drm-next into drm-xe-next

Backmerging to bring in 6.18-rc1.

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

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

Sync to v6.18-rc1.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge drm/drm-next into drm-misc-next

Updating drm-misc-next to the state of v6.18-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

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

Cross-merge BPF and other fixes after downstream PR.

No conflicts.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>