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| author |   Logan Gunthorpe <logang@deltatee.com> | 2018-07-30 10:18:37 -0600 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2018-08-09 16:23:06 -0500 |
| commit | 07d8d7e57c28ca9a07dab4efd75dad3a654aeb85 (patch) | |
| tree | 53592de54320ccabbfd94f043769cc3881ad0b41 /Documentation/admin-guide | |
| parent | PCI: Hide ACS quirk declarations inside PCI core (diff) | |
| download | linux-dev-07d8d7e57c28ca9a07dab4efd75dad3a654aeb85.tar.xz linux-dev-07d8d7e57c28ca9a07dab4efd75dad3a654aeb85.zip | |
PCI: Make specifying PCI devices in kernel parameters reusable
Separate out the code to match a PCI device with a string (typically
originating from a kernel parameter) from the
pci_specified_resource_alignment() function into its own helper function.
While we are at it, this change fixes the kernel style of the function
(fixing a number of long lines and extra parentheses).
Additionally, make the analogous change to the kernel parameter
documentation: Separate the description of how to specify a PCI device
into its own section at the head of the "pci=" parameter.
This patch should have no functional alterations.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
[bhelgaas: use "device" instead of "slot" in documentation since that's the
usual language in the PCI specs]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Stephen Bates <sbates@raithlin.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Christian König <christian.koenig@amd.com>
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index efc7aa7a0670..ab36fb34ed01 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2994,7 +2994,26 @@ See header of drivers/block/paride/pcd.c. See also Documentation/blockdev/paride.txt. - pci=option[,option...] [PCI] various PCI subsystem options: + 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>:<device>.<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. The second format + selects devices using IDs from the + configuration space which may match multiple + devices in the system. + earlydump [X86] dump PCI config space before the kernel changes anything off [X86] don't probe for the PCI bus @@ -3123,11 +3142,10 @@ 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 |