linux-kernel - [RFC 3/3] Documentation: Add pci device delete

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Message-Id: <1506544822-2632-4-git-send-email-jonathan.derrick@intel.com>
Date:   Wed, 27 Sep 2017 16:40:22 -0400
From:   Jon Derrick <jonathan.derrick@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Helgaas <helgaas@...nel.org>
Cc:     <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Arjan van de Ven <arjan@...ux.intel.com>,
        Alan Cox <alan@...ux.intel.com>,
        Dan J Williams <dan.j.williams@...el.com>,
        Jon Derrick <jonathan.derrick@...el.com>
Subject: [RFC 3/3] Documentation: Add pci device delete_id interface

Document the <driver>.delete_id= cmdline interface for masking built-in
and module device id tables.

Signed-off-by: Jon Derrick <jonathan.derrick@...el.com>
---
 Documentation/admin-guide/kernel-parameters.txt | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 0549662..862c8b5 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -789,6 +789,19 @@
 			Defaults to the default architecture's huge page size
 			if not specified.
 
+	driver.delete_id=
+			[PCI]
+			Specified pci device format(s) will mask built-in
+			driver id tables, preventing devices from
+			automicatically attaching to built-in or module
+			drivers.  Later attachment should be done by adding the
+			deleted id back through the "new_id" sysfs interface.
+			Format: <vendor>:<device>[:<subvendor>:<subdevice>]\
+					[:class][:class_mask][, ...]
+			PCI_ANY_ID masks should use the full 32-bit format.
+			Examples: virtio-pci.delete_id=ffffffff:ffffffff
+				  nvme.delete_id=1234:5678,1111:ffffffff
+
 	dhash_entries=	[KNL]
 			Set number of hash buckets for dentry cache.
 
-- 
1.8.3.1