Document loader tunables hw.pci.enable_io_modes and
hw.pci.allow_unsupported_io_range. Submitted by: Hiten Pandya <hiten@angelica.unixdaemons.com> Approved by: re (murray)
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=106845
@ -277,6 +277,21 @@
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this option provides a hint as to the actual size of
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system memory (which will be tested before use).
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set hw.pci.allow_unsupported_io_range=<value>
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Allow the PCI Bridge to pass through an unsupported
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memory range assigned by the BIOS.
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value is 0 (default) or non-zero to enable.
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set hw.pci.enable_io_modes=<value>
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Enable PCI resources which are left off by some BIOSes
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or are not enabled correctly by the device driver.
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value is 1 (default), but this may cause problems with
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some peripherals. Set to 0 to disable.
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################################################################################
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# Tshow DShow the values of variables
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@ -422,6 +422,15 @@ are also accepted and indicate kilobytes, megabytes and gigabytes
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respectively.
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An invalid suffix will result in the variable being ignored by the
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kernel.
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.It Va hw.pci.enable_io_modes
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Enable PCI resources which are left off by some BIOSes or are not
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enabled correctly by the device driver.
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Tunable value set to ON (1) by default, but this may cause problems
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with some peripherals.
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.It Va hw.pci_allow_unsupported_io_range
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Allow the PCI bridge to pass through an unsupported memory range
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assigned by the BIOS.
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Tunable value set to OFF (0) by default.
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.It Va kern.maxusers
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Set the size of a number of statically allocated system tables; see
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.Xr tuning 7
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