a923874198
Pull PCI changes from Bjorn Helgaas:
PCI device hotplug:
- Use PCIe native hotplug, not ACPI hotplug, when possible (Neil Horman)
- Assign resources on per-host bridge basis (Yinghai Lu)
MPS (Max Payload Size):
- Allow larger MPS settings below hotplug-capable Root Port (Yijing Wang)
- Add warnings about unsafe MPS settings (Yijing Wang)
- Simplify interface and messages (Bjorn Helgaas)
SR-IOV:
- Return -ENOSYS on non-SR-IOV devices (Stefan Assmann)
- Update NumVFs register when disabling SR-IOV (Yijing Wang)
Virtualization:
- Add bus and slot reset support (Alex Williamson)
- Fix ACS (Access Control Services) issues (Alex Williamson)
Miscellaneous:
- Simplify PCIe Capability accessors (Bjorn Helgaas)
- Add pcibios_pm_ops for arch-specific hibernate stuff (Sebastian Ott)
- Disable decoding during BAR sizing only when necessary (Zoltan Kiss)
- Delay enabling bridges until they're needed (Yinghai Lu)
- Split Designware support into Synopsys and Exynos parts (Jingoo Han)
- Convert class code to use dev_groups (Greg Kroah-Hartman)
- Cleanup Designware and Exynos I/O access wrappers (Seungwon Jeon)
- Fix bridge I/O window alignment (Bjorn Helgaas)
- Add pci_wait_for_pending_transaction() (Casey Leedom)
- Use devm_ioremap_resource() in Marvell driver (Tushar Behera)
* tag 'pci-v3.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (63 commits)
PCI/ACPI: Fix _OSC ordering to allow PCIe hotplug use when available
PCI: exynos: Add I/O access wrappers
PCI: designware: Drop "addr" arg from dw_pcie_readl_rc()/dw_pcie_writel_rc()
PCI: Remove pcie_cap_has_devctl()
PCI: Support PCIe Capability Slot registers only for ports with slots
PCI: Remove PCIe Capability version checks
PCI: Allow PCIe Capability link-related register access for switches
PCI: Add offsets of PCIe capability registers
PCI: Tidy bitmasks and spacing of PCIe capability definitions
PCI: Remove obsolete comment reference to pci_pcie_cap2()
PCI: Clarify PCI_EXP_TYPE_PCI_BRIDGE comment
PCI: Rename PCIe capability definitions to follow convention
PCI: Warn if unsafe MPS settings detected
PCI: Fix MPS peer-to-peer DMA comment syntax
PCI: Disable decoding for BAR sizing only when it was actually enabled
PCI: Add comment about needing pci_msi_off() even when CONFIG_PCI_MSI=n
PCI: Add pcibios_pm_ops for optional arch-specific hibernate functionality
PCI: Don't restrict MPS for slots below Root Ports
PCI: Simplify MPS test for Downstream Port
PCI: Remove unnecessary check for pcie_get_mps() failure
...
83 lines
2.0 KiB
Plaintext
83 lines
2.0 KiB
Plaintext
#
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# PCI Express Port Bus Configuration
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#
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config PCIEPORTBUS
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bool "PCI Express Port Bus support"
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depends on PCI
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help
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This automatically enables PCI Express Port Bus support. Users can
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choose Native Hot-Plug support, Advanced Error Reporting support,
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Power Management Event support and Virtual Channel support to run
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on PCI Express Ports (Root or Switch).
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#
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# Include service Kconfig here
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#
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config HOTPLUG_PCI_PCIE
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bool "PCI Express Hotplug driver"
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depends on HOTPLUG_PCI && PCIEPORTBUS
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help
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Say Y here if you have a motherboard that supports PCI Express Native
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Hotplug
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When in doubt, say N.
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source "drivers/pci/pcie/aer/Kconfig"
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#
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# PCI Express ASPM
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#
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config PCIEASPM
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bool "PCI Express ASPM control" if EXPERT
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depends on PCI && PCIEPORTBUS
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default y
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help
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This enables OS control over PCI Express ASPM (Active State
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Power Management) and Clock Power Management. ASPM supports
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state L0/L0s/L1.
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ASPM is initially set up by the firmware. With this option enabled,
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Linux can modify this state in order to disable ASPM on known-bad
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hardware or configurations and enable it when known-safe.
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ASPM can be disabled or enabled at runtime via
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/sys/module/pcie_aspm/parameters/policy
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When in doubt, say Y.
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config PCIEASPM_DEBUG
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bool "Debug PCI Express ASPM"
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depends on PCIEASPM
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default n
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help
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This enables PCI Express ASPM debug support. It will add per-device
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interface to control ASPM.
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choice
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prompt "Default ASPM policy"
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default PCIEASPM_DEFAULT
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depends on PCIEASPM
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config PCIEASPM_DEFAULT
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bool "BIOS default"
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depends on PCIEASPM
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help
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Use the BIOS defaults for PCI Express ASPM.
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config PCIEASPM_POWERSAVE
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bool "Powersave"
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depends on PCIEASPM
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help
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Enable PCI Express ASPM L0s and L1 where possible, even if the
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BIOS did not.
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config PCIEASPM_PERFORMANCE
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bool "Performance"
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depends on PCIEASPM
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help
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Disable PCI Express ASPM L0s and L1, even if the BIOS enabled them.
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endchoice
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config PCIE_PME
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def_bool y
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depends on PCIEPORTBUS && PM_RUNTIME
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