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Message-Id: <1531863587-3723-4-git-send-email-jonathan.derrick@intel.com>
Date: Tue, 17 Jul 2018 15:39:47 -0600
From: Jon Derrick <jonathan.derrick@...el.com>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-doc@...r.kernel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Keith Busch <keith.busch@...el.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
Sinan Kaya <okaya@...eaurora.org>,
Logan Gunthorpe <logang@...tatree.com>,
Stephen Bates <sbates@...thlin.com>,
Jon Derrick <jonathan.derrick@...el.com>
Subject: [RFC 3/3] docs: Document the expanded hp{io,mem}size interface
The expanded interface allows specifying sizes on a per-device/per-bus
path granularity.
Signed-off-by: Jon Derrick <jonathan.derrick@...el.com>
---
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:
+ <nn[KMG]>
+ <nn[KMG]>@][<domain>:]<bus>[:<slot>.<func>][; ...]
+ <nn[KMG]>@]pci:<vendor>:<device>\
+ [:<subvendor>:<subdevice>][; ...]
+ 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:
+ <nn[KMG]>[P]
+ <nn[KMG]>[P]@][<domain>:]<bus>[:<slot>.<func>][; ...]
+ <nn[KMG]>[P]@]pci:<vendor>:<device>\
+ [:<subvendor>:<subdevice>][; ...]
+ 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
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