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-----BEGIN PGP SIGNATURE----- iQJIBAABCgAyFiEEgMe7l+5h9hnxdsnuWYigwDrT+vwFAmfmt1AUHGJoZWxnYWFz QGdvb2dsZS5jb20ACgkQWYigwDrT+vxqNw//cC1BlVe4UUVR5r9nfpoFeGAZeDJz 32naGvZKjwL0tR6dStO/BEZx4QrBp+smVfJfuxtQxfzLHLgMigM2jVhfa7XUmaun 7yZlJZu4Jmydc57sPf56CFOYOFP6zyPzSaE8u1Eb4IIqpvuoYpvDayDt6PSsLmFS PDzqmicT3nuNbbcfE4rYLyL6JsXooKCR1h+NNcDjy7Run9DvQbE6N2PPvXCu6O97 aC3+kYUydEpgn9DfjBDghe+GBQCkBPldwnWqXBxKDFmYj5bKFujNccS9/IDSEuuX oWntDRAXgLWg048sBC1AuJQajF3UaqffRGJkzUBaZWbU/jB9t5N/Z3GpYlXzizRx CAqnt/ciGUKVbaESKwoeeIqgK+wG1bnrmoEaJHXFGqjr6sjm2A2T5EzyBMJ1hFwE wUq6SDnkp5igG7rWtsBPo/lGa5h/pNlaXng11570ikD2ZfHVfRgwy2MpXYxChrkt X2q/lRYU7yyfNJQ8O5LQJ6bYztatjxT0TxXNFv+cxfVrdI7vnQMuaeBE352jn+Lo aZ8fTJDFbRXtrZolcoetZjBdHwPIS42wYQtvxo/ylUl64xKEzZEzN09XODjwn74v nuOzDtbM0TAjZWxi6bwRFPnemTEAQxPuv1i4VdPQ7yblvC0at2agNBsz6Fdq60GS s80YMJVUU0UcVoc= =gM1i -----END PGP SIGNATURE----- Merge tag 'pci-v6.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci Pull pci updates from Bjorn Helgaas: "Enumeration: - Enable Configuration RRS SV, which makes device readiness visible, early instead of during child bus scanning (Bjorn Helgaas) - Log debug messages about reset methods being used (Bjorn Helgaas) - Avoid reset when it has been disabled via sysfs (Nishanth Aravamudan) - Add common pci-ep-bus.yaml schema for exporting several peripherals of a single PCI function via devicetree (Andrea della Porta) - Create DT nodes for PCI host bridges to enable loading device tree overlays to create platform devices for PCI devices that have several features that require multiple drivers (Herve Codina) Resource management: - Enlarge devres table[] to accommodate bridge windows, ROM, IOV BARs, etc., and validate BAR index in devres interfaces (Philipp Stanner) - Fix typo that repeatedly distributed resources to a bridge instead of iterating over subordinate bridges, which resulted in too little space to assign some BARs (Kai-Heng Feng) - Relax bridge window tail sizing for optional resources, e.g., IOV BARs, to avoid failures when removing and re-adding devices (Ilpo Järvinen) - Allow drivers to enable devices even if we haven't assigned optional IOV resources to them (Ilpo Järvinen) - Rework handling of optional resources (IOV BARs, ROMs) to reduce failures if we can't allocate them (Ilpo Järvinen) - Fix a NULL dereference in the SR-IOV VF creation error path (Shay Drory) - Fix s390 mmio_read/write syscalls, which didn't cause page faults in some cases, which broke vfio-pci lazy mapping on first access (Niklas Schnelle) - Add pdev->non_mappable_bars to replace CONFIG_VFIO_PCI_MMAP, which was disabled only for s390 (Niklas Schnelle) - Support mmap of PCI resources on s390 except for ISM devices (Niklas Schnelle) ASPM: - Delay pcie_link_state deallocation to avoid dangling pointers that cause invalid references during hot-unplug (Daniel Stodden) Power management: - Allow PCI bridges to go to D3Hot when suspending on all non-x86 systems (Manivannan Sadhasivam) Power control: - Create pwrctrl devices in pci_scan_device() to make it more symmetric with pci_pwrctrl_unregister() and make pwrctrl devices for PCI bridges possible (Manivannan Sadhasivam) - Unregister pwrctrl devices in pci_destroy_dev() so DOE, ASPM, etc. can still access devices after pci_stop_dev() (Manivannan Sadhasivam) - If there's a pwrctrl device for a PCI device, skip scanning it because the pwrctrl core will rescan the bus after the device is powered on (Manivannan Sadhasivam) - Add a pwrctrl driver for PCI slots based on voltage regulators described via devicetree (Manivannan Sadhasivam) Bandwidth control: - Add set_pcie_speed.sh to TEST_PROGS to fix issue when executing the set_pcie_cooling_state.sh test case (Yi Lai) - Avoid a NULL pointer dereference when we run out of bus numbers to assign for a bridge secondary bus (Lukas Wunner) Hotplug: - Drop superfluous pci_hotplug_slot_list, try_module_get() calls, and NULL pointer checks (Lukas Wunner) - Drop shpchp module init/exit logging, replace shpchp dbg() with ctrl_dbg(), and remove unused dbg(), err(), info(), warn() wrappers (Ilpo Järvinen) - Drop 'shpchp_debug' module parameter in favor of standard dynamic debugging (Ilpo Järvinen) - Drop unused cpcihp .get_power(), .set_power() function pointers (Guilherme Giacomo Simoes) - Disable hotplug interrupts in portdrv only when pciehp is not enabled to avoid issuing two hotplug commands too close together (Feng Tang) - Skip pciehp 'device replaced' check if the device has been removed to address a deadlock when resuming after a device was removed during system sleep (Lukas Wunner) - Don't enable pciehp hotplug interupt when resuming in poll mode (Ilpo Järvinen) Virtualization: - Fix bugs in 'pci=config_acs=' kernel command line parameter (Tushar Dave) DOE: - Expose supported DOE features via sysfs (Alistair Francis) - Allow DOE support to be enabled even if CXL isn't enabled (Alistair Francis) Endpoint framework: - Convert PCI device data so pci-epf-test works correctly on big-endian endpoint systems (Niklas Cassel) - Add BAR_RESIZABLE type to endpoint framework and add DWC core support for EPF drivers to set BAR_RESIZABLE type and size (Niklas Cassel) - Fix pci-epf-test double free that causes an oops if the host reboots and PERST# deassertion restarts endpoint BAR allocation (Christian Bruel) - Fix endpoint BAR testing so tests can skip disabled BARs instead of reporting them as failures (Niklas Cassel) - Widen endpoint test BAR size variable to accommodate BARs larger than INT_MAX (Niklas Cassel) - Remove unused tools 'pci' build target left over after moving tests to tools/testing/selftests/pci_endpoint (Jianfeng Liu) Altera PCIe controller driver: - Add DT binding and driver support for Agilex family (P-Tile, F-Tile, R-Tile) (Matthew Gerlach and D M, Sharath Kumar) AMD MDB PCIe controller driver: - Add DT binding and driver for AMD MDB (Multimedia DMA Bridge) (Thippeswamy Havalige) Broadcom STB PCIe controller driver: - Add BCM2712 MSI-X DT binding and interrupt controller drivers and add softdep on irq_bcm2712_mip driver to ensure that it is loaded first (Stanimir Varbanov) - Expand inbound window map to 64GB so it can accommodate BCM2712 (Stanimir Varbanov) - Add BCM2712 support and DT updates (Stanimir Varbanov) - Apply link speed restriction before bringing link up, not after (Jim Quinlan) - Update Max Link Speed in Link Capabilities via the internal writable register, not the read-only config register (Jim Quinlan) - Handle regulator_bulk_get() error to avoid panic when we call regulator_bulk_free() later (Jim Quinlan) - Disable regulators only when removing the bus immediately below a Root Port because we don't support regulators deeper in the hierarchy (Jim Quinlan) - Make const read-only arrays static (Colin Ian King) Cadence PCIe endpoint driver: - Correct MSG TLP generation so endpoints can generate INTx messages (Hans Zhang) Freescale i.MX6 PCIe controller driver: - Identify the second controller on i.MX8MQ based on devicetree 'linux,pci-domain' instead of DBI 'reg' address (Richard Zhu) - Remove imx_pcie_cpu_addr_fixup() since dwc core can now derive the ATU input address (using parent_bus_offset) from devicetree (Frank Li) Freescale Layerscape PCIe controller driver: - Drop deprecated 'num-ib-windows' and 'num-ob-windows' and unnecessary 'status' from example (Krzysztof Kozlowski) - Correct the syscon_regmap_lookup_by_phandle_args("fsl,pcie-scfg") arg_count to fix probe failure on LS1043A (Ioana Ciornei) HiSilicon STB PCIe controller driver: - Call phy_exit() to clean up if histb_pcie_probe() fails (Christophe JAILLET) Intel Gateway PCIe controller driver: - Remove intel_pcie_cpu_addr() since dwc core can now derive the ATU input address (using parent_bus_offset) from devicetree (Frank Li) Intel VMD host bridge driver: - Convert vmd_dev.cfg_lock from spinlock_t to raw_spinlock_t so pci_ops.read() will never sleep, even on PREEMPT_RT where spinlock_t becomes a sleepable lock, to avoid calling a sleeping function from invalid context (Ryo Takakura) MediaTek PCIe Gen3 controller driver: - Remove leftover mac_reset assert for Airoha EN7581 SoC (Lorenzo Bianconi) - Add EN7581 PBUS controller 'mediatek,pbus-csr' DT property and program host bridge memory aperture to this syscon node (Lorenzo Bianconi) Qualcomm PCIe controller driver: - Add qcom,pcie-ipq5332 binding (Varadarajan Narayanan) - Add qcom i.MX8QM and i.MX8QXP/DXP optional DMA interrupt (Alexander Stein) - Add optional dma-coherent DT property for Qualcomm SA8775P (Dmitry Baryshkov) - Make DT iommu property required for SA8775P and prohibited for SDX55 (Dmitry Baryshkov) - Add DT IOMMU and DMA-related properties for Qualcomm SM8450 (Dmitry Baryshkov) - Add endpoint DT properties for SAR2130P and enable endpoint mode in driver (Dmitry Baryshkov) - Describe endpoint BAR0 and BAR2 as 64-bit only and BAR1 and BAR3 as RESERVED (Manivannan Sadhasivam) Rockchip DesignWare PCIe controller driver: - Describe rk3568 and rk3588 BARs as Resizable, not Fixed (Niklas Cassel) Synopsys DesignWare PCIe controller driver: - Add debugfs-based Silicon Debug, Error Injection, Statistical Counter support for DWC (Shradha Todi) - Add debugfs property to expose LTSSM status of DWC PCIe link (Hans Zhang) - Add Rockchip support for DWC debugfs features (Niklas Cassel) - Add dw_pcie_parent_bus_offset() to look up the parent bus address of a specified 'reg' property and return the offset from the CPU physical address (Frank Li) - Use dw_pcie_parent_bus_offset() to derive CPU -> ATU addr offset via 'reg[config]' for host controllers and 'reg[addr_space]' for endpoint controllers (Frank Li) - Apply struct dw_pcie.parent_bus_offset in ATU users to remove use of .cpu_addr_fixup() when programming ATU (Frank Li) TI J721E PCIe driver: - Correct the 'link down' interrupt bit for J784S4 (Siddharth Vadapalli) TI Keystone PCIe controller driver: - Describe AM65x BARs 2 and 5 as Resizable (not Fixed) and reduce alignment requirement from 1MB to 64KB (Niklas Cassel) Xilinx Versal CPM PCIe controller driver: - Free IRQ domain in probe error path to avoid leaking it (Thippeswamy Havalige) - Add DT .compatible "xlnx,versal-cpm5nc-host" and driver support for Versal Net CPM5NC Root Port controller (Thippeswamy Havalige) - Add driver support for CPM5_HOST1 (Thippeswamy Havalige) Miscellaneous: - Convert fsl,mpc83xx-pcie binding to YAML (J. Neuschäfer) - Use for_each_available_child_of_node_scoped() to simplify apple, kirin, mediatek, mt7621, tegra drivers (Zhang Zekun)" * tag 'pci-v6.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (197 commits) PCI: layerscape: Fix arg_count to syscon_regmap_lookup_by_phandle_args() PCI: j721e: Fix the value of .linkdown_irq_regfield for J784S4 misc: pci_endpoint_test: Add support for PCITEST_IRQ_TYPE_AUTO PCI: endpoint: pci-epf-test: Expose supported IRQ types in CAPS register PCI: dw-rockchip: Endpoint mode cannot raise INTx interrupts PCI: endpoint: Add intx_capable to epc_features struct dt-bindings: PCI: Add common schema for devices accessible through PCI BARs PCI: intel-gw: Remove intel_pcie_cpu_addr() PCI: imx6: Remove imx_pcie_cpu_addr_fixup() PCI: dwc: Use parent_bus_offset to remove need for .cpu_addr_fixup() PCI: dwc: ep: Ensure proper iteration over outbound map windows PCI: dwc: ep: Use devicetree 'reg[addr_space]' to derive CPU -> ATU addr offset PCI: dwc: ep: Consolidate devicetree handling in dw_pcie_ep_get_resources() PCI: dwc: ep: Call epc_create() early in dw_pcie_ep_init() PCI: dwc: Use devicetree 'reg[config]' to derive CPU -> ATU addr offset PCI: dwc: Add dw_pcie_parent_bus_offset() checking and debug PCI: dwc: Add dw_pcie_parent_bus_offset() PCI/bwctrl: Fix NULL pointer dereference on bus number exhaustion PCI: xilinx-cpm: Add cpm_csr register mapping for CPM5_HOST1 variant PCI: brcmstb: Make const read-only arrays static ...
329 lines
9.5 KiB
Plaintext
329 lines
9.5 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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#
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# PCI configuration
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#
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# select this to offer the PCI prompt
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config HAVE_PCI
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bool
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# select this to unconditionally force on PCI support
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config FORCE_PCI
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bool
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select HAVE_PCI
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select PCI
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# select this to provide a generic PCI iomap,
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# without PCI itself having to be defined
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config GENERIC_PCI_IOMAP
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bool
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menuconfig PCI
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bool "PCI support"
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depends on HAVE_PCI
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help
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This option enables support for the PCI local bus, including
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support for PCI-X and the foundations for PCI Express support.
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Say 'Y' here unless you know what you are doing.
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if PCI
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config PCI_DOMAINS
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bool
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depends on PCI
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config PCI_DOMAINS_GENERIC
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bool
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select PCI_DOMAINS
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config PCI_SYSCALL
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bool
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source "drivers/pci/pcie/Kconfig"
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config PCI_MSI
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bool "Message Signaled Interrupts (MSI and MSI-X)"
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select GENERIC_MSI_IRQ
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help
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This allows device drivers to enable MSI (Message Signaled
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Interrupts). Message Signaled Interrupts enable a device to
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generate an interrupt using an inbound Memory Write on its
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PCI bus instead of asserting a device IRQ pin.
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Use of PCI MSI interrupts can be disabled at kernel boot time
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by using the 'pci=nomsi' option. This disables MSI for the
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entire system.
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If you don't know what to do here, say Y.
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config PCI_MSI_ARCH_FALLBACKS
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bool
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config PCI_QUIRKS
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default y
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bool "Enable PCI quirk workarounds" if EXPERT
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help
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This enables workarounds for various PCI chipset bugs/quirks.
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Disable this only if your target machine is unaffected by PCI
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quirks.
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config PCI_DEBUG
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bool "PCI Debugging"
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depends on DEBUG_KERNEL
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help
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Say Y here if you want the PCI core to produce a bunch of debug
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messages to the system log. Select this if you are having a
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problem with PCI support and want to see more of what is going on.
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When in doubt, say N.
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config PCI_REALLOC_ENABLE_AUTO
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bool "Enable PCI resource re-allocation detection"
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depends on PCI_IOV
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help
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Say Y here if you want the PCI core to detect if PCI resource
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re-allocation needs to be enabled. You can always use pci=realloc=on
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or pci=realloc=off to override it. It will automatically
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re-allocate PCI resources if SR-IOV BARs have not been allocated by
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the BIOS.
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When in doubt, say N.
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config PCI_STUB
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tristate "PCI Stub driver"
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help
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Say Y or M here if you want be able to reserve a PCI device
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when it is going to be assigned to a guest operating system.
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When in doubt, say N.
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config PCI_PF_STUB
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tristate "PCI PF Stub driver"
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depends on PCI_IOV
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help
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Say Y or M here if you want to enable support for devices that
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require SR-IOV support, while at the same time the PF (Physical
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Function) itself is not providing any actual services on the
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host itself such as storage or networking.
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When in doubt, say N.
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config XEN_PCIDEV_FRONTEND
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tristate "Xen PCI Frontend"
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depends on XEN_PV
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select PCI_XEN
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select XEN_XENBUS_FRONTEND
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default y
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help
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The PCI device frontend driver allows the kernel to import arbitrary
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PCI devices from a PCI backend to support PCI driver domains.
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config PCI_ATS
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bool
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config PCI_DOE
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bool "Enable PCI Data Object Exchange (DOE) support"
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help
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Say Y here if you want be able to communicate with PCIe DOE
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mailboxes.
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config PCI_ECAM
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bool
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config PCI_LOCKLESS_CONFIG
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bool
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config PCI_BRIDGE_EMUL
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bool
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config PCI_IOV
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bool "PCI IOV support"
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select PCI_ATS
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help
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I/O Virtualization is a PCI feature supported by some devices
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which allows them to create virtual devices which share their
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physical resources.
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If unsure, say N.
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config PCI_NPEM
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bool "Native PCIe Enclosure Management"
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depends on LEDS_CLASS=y
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help
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Support for Native PCIe Enclosure Management. It allows managing LED
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indications in storage enclosures. Enclosure must support following
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indications: OK, Locate, Fail, Rebuild, other indications are
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optional.
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config PCI_PRI
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bool "PCI PRI support"
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select PCI_ATS
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help
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PRI is the PCI Page Request Interface. It allows PCI devices that are
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behind an IOMMU to recover from page faults.
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If unsure, say N.
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config PCI_PASID
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bool "PCI PASID support"
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select PCI_ATS
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help
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Process Address Space Identifiers (PASIDs) can be used by PCI devices
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to access more than one IO address space at the same time. To make
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use of this feature an IOMMU is required which also supports PASIDs.
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Select this option if you have such an IOMMU and want to compile the
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driver for it into your kernel.
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If unsure, say N.
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config PCIE_TPH
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bool "TLP Processing Hints"
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help
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This option adds support for PCIe TLP Processing Hints (TPH).
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TPH allows endpoint devices to provide optimization hints, such as
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desired caching behavior, for requests that target memory space.
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These hints, called Steering Tags, can empower the system hardware
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to optimize the utilization of platform resources.
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config PCI_P2PDMA
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bool "PCI peer-to-peer transfer support"
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depends on ZONE_DEVICE
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#
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# The need for the scatterlist DMA bus address flag means PCI P2PDMA
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# requires 64bit
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#
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depends on 64BIT
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select GENERIC_ALLOCATOR
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select NEED_SG_DMA_FLAGS
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help
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Enables drivers to do PCI peer-to-peer transactions to and from
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BARs that are exposed in other devices that are the part of
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the hierarchy where peer-to-peer DMA is guaranteed by the PCI
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specification to work (ie. anything below a single PCI bridge).
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Many PCIe root complexes do not support P2P transactions and
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it's hard to tell which support it at all, so at this time,
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P2P DMA transactions must be between devices behind the same root
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port.
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Enabling this option will reduce the entropy of x86 KASLR memory
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regions. For example - on a 46 bit system, the entropy goes down
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from 16 bits to 15 bits. The actual reduction in entropy depends
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on the physical address bits, on processor features, kernel config
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(5 level page table) and physical memory present on the system.
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If unsure, say N.
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config PCI_LABEL
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def_bool y if (DMI || ACPI)
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select NLS
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config PCI_HYPERV
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tristate "Hyper-V PCI Frontend"
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depends on ((X86 && X86_64) || ARM64) && HYPERV && PCI_MSI && SYSFS
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select PCI_HYPERV_INTERFACE
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help
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The PCI device frontend driver allows the kernel to import arbitrary
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PCI devices from a PCI backend to support PCI driver domains.
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config PCI_DYNAMIC_OF_NODES
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bool "Create Device tree nodes for PCI devices"
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depends on OF_IRQ
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select OF_DYNAMIC
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help
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This option enables support for generating device tree nodes for some
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PCI devices. Thus, the driver of this kind can load and overlay
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flattened device tree for its downstream devices.
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Once this option is selected, the device tree nodes will be generated
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for all PCI bridges.
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choice
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prompt "PCI Express hierarchy optimization setting"
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default PCIE_BUS_DEFAULT
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depends on PCI && EXPERT
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help
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MPS (Max Payload Size) and MRRS (Max Read Request Size) are PCIe
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device parameters that affect performance and the ability to
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support hotplug and peer-to-peer DMA.
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The following choices set the MPS and MRRS optimization strategy
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at compile-time. The choices are the same as those offered for
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the kernel command-line parameter 'pci', i.e.,
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'pci=pcie_bus_tune_off', 'pci=pcie_bus_safe',
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'pci=pcie_bus_perf', and 'pci=pcie_bus_peer2peer'.
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This is a compile-time setting and can be overridden by the above
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command-line parameters. If unsure, choose PCIE_BUS_DEFAULT.
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config PCIE_BUS_TUNE_OFF
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bool "Tune Off"
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depends on PCI
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help
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Use the BIOS defaults; don't touch MPS at all. This is the same
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as booting with 'pci=pcie_bus_tune_off'.
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config PCIE_BUS_DEFAULT
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bool "Default"
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depends on PCI
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help
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Default choice; ensure that the MPS matches upstream bridge.
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config PCIE_BUS_SAFE
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bool "Safe"
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depends on PCI
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help
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Use largest MPS that boot-time devices support. If you have a
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closed system with no possibility of adding new devices, this
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will use the largest MPS that's supported by all devices. This
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is the same as booting with 'pci=pcie_bus_safe'.
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config PCIE_BUS_PERFORMANCE
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bool "Performance"
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depends on PCI
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help
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Use MPS and MRRS for best performance. Ensure that a given
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device's MPS is no larger than its parent MPS, which allows us to
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keep all switches/bridges to the max MPS supported by their
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parent. This is the same as booting with 'pci=pcie_bus_perf'.
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config PCIE_BUS_PEER2PEER
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bool "Peer2peer"
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depends on PCI
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help
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Set MPS = 128 for all devices. MPS configuration effected by the
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other options could cause the MPS on one root port to be
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different than that of the MPS on another, which may cause
|
|
hot-added devices or peer-to-peer DMA to fail. Set MPS to the
|
|
smallest possible value (128B) system-wide to avoid these issues.
|
|
This is the same as booting with 'pci=pcie_bus_peer2peer'.
|
|
|
|
endchoice
|
|
|
|
config VGA_ARB
|
|
bool "VGA Arbitration" if EXPERT
|
|
default y
|
|
depends on (PCI && !S390)
|
|
help
|
|
Some "legacy" VGA devices implemented on PCI typically have the same
|
|
hard-decoded addresses as they did on ISA. When multiple PCI devices
|
|
are accessed at same time they need some kind of coordination. Please
|
|
see Documentation/gpu/vgaarbiter.rst for more details. Select this to
|
|
enable VGA arbiter.
|
|
|
|
config VGA_ARB_MAX_GPUS
|
|
int "Maximum number of GPUs"
|
|
default 16
|
|
depends on VGA_ARB
|
|
help
|
|
Reserves space in the kernel to maintain resource locking for
|
|
multiple GPUS. The overhead for each GPU is very small.
|
|
|
|
source "drivers/pci/hotplug/Kconfig"
|
|
source "drivers/pci/controller/Kconfig"
|
|
source "drivers/pci/endpoint/Kconfig"
|
|
source "drivers/pci/switch/Kconfig"
|
|
source "drivers/pci/pwrctrl/Kconfig"
|
|
|
|
endif
|