From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: From: Jon Derrick To: Bjorn Helgaas Cc: , , , Lorenzo Pieralisi , Keith Busch , Greg Kroah-Hartman , Mika Westerberg , Sinan Kaya , Logan Gunthorpe , Stephen Bates , Jon Derrick Subject: [RFC 3/3] docs: Document the expanded hp{io,mem}size interface Date: Tue, 17 Jul 2018 15:39:47 -0600 Message-Id: <1531863587-3723-4-git-send-email-jonathan.derrick@intel.com> In-Reply-To: <1531863587-3723-1-git-send-email-jonathan.derrick@intel.com> References: <1531863587-3723-1-git-send-email-jonathan.derrick@intel.com> List-ID: The expanded interface allows specifying sizes on a per-device/per-bus path granularity. Signed-off-by: Jon Derrick --- Documentation/admin-guide/kernel-parameters.txt | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 533ff5c..8e4c129 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3142,11 +3142,24 @@ the default. off: Turn ECRC off on: Turn ECRC on. - hpiosize=nn[KMG] The fixed amount of bus space which is - reserved for hotplug bridge's IO window. + hpiosize= + Format: + + @][:][:.][; ...] + @]pci::\ + [::][; ...] + The fixed amount of bus space which is reserved + for the matching hotplug bridge(s)'s IO window. Default size is 256 bytes. - hpmemsize=nn[KMG] The fixed amount of bus space which is - reserved for hotplug bridge's memory window. + hpmemsize= + Format: + [P] + [P]@][:][:.][; ...] + [P]@]pci::\ + [::][; ...] + The fixed amount of bus space which is reserved + for the matching hotplug bridge(s)'s memory window. + 'P' specifies prefetchable. Default size is 2 megabytes. hpbussize=nn The minimum amount of additional bus numbers reserved for buses below a hotplug bridge. -- 1.8.3.1