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Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 43 |
1 files changed, 37 insertions, 6 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 0c883029881a..adafe47ac376 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3089,8 +3089,31 @@ See header of drivers/block/paride/pcd.c. See also Documentation/blockdev/paride.txt. - pci=option[,option...] [PCI] various PCI subsystem options: - earlydump [X86] dump PCI config space before the kernel + pci=option[,option...] [PCI] various PCI subsystem options. + + Some options herein operate on a specific device + or a set of devices (<pci_dev>). These are + specified in one of the following formats: + + [<domain>:]<bus>:<dev>.<func>[/<dev>.<func>]* + pci:<vendor>:<device>[:<subvendor>:<subdevice>] + + Note: the first format specifies a PCI + bus/device/function address which may change + if new hardware is inserted, if motherboard + firmware changes, or due to changes caused + by other kernel parameters. If the + domain is left unspecified, it is + taken to be zero. Optionally, a path + to a device through multiple device/function + addresses can be specified after the base + address (this is more robust against + renumbering issues). The second format + selects devices using IDs from the + configuration space which may match multiple + devices in the system. + + earlydump dump PCI config space before the kernel changes anything off [X86] don't probe for the PCI bus bios [X86-32] force use of PCI BIOS, don't access @@ -3218,11 +3241,10 @@ window. The default value is 64 megabytes. resource_alignment= Format: - [<order of align>@][<domain>:]<bus>:<slot>.<func>[; ...] - [<order of align>@]pci:<vendor>:<device>\ - [:<subvendor>:<subdevice>][; ...] + [<order of align>@]<pci_dev>[; ...] Specifies alignment and device to reassign - aligned memory resources. + aligned memory resources. How to + specify the device is described above. If <order of align> is not specified, PAGE_SIZE is used as alignment. PCI-PCI bridge can be specified, if resource @@ -3265,6 +3287,15 @@ Adding the window is slightly risky (it may conflict with unreported devices), so this taints the kernel. + disable_acs_redir=<pci_dev>[; ...] + Specify one or more PCI devices (in the format + specified above) separated by semicolons. + Each device specified will have the PCI ACS + redirect capabilities forced off which will + allow P2P traffic between devices through + bridges without forcing it upstream. Note: + this removes isolation between devices and + may put more devices in an IOMMU group. pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power Management. |