x86/PCI: add description for check_enable_amd_mmconf boot parameter

Describe check_enable_amd_mmconf.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 395d1a0..8a82489 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1735,6 +1735,9 @@ and is between 256 and 4096 characters. It is defined in the file
                                root domains (aka PCI segments, in ACPI-speak).
                nommconf        [X86] Disable use of MMCONFIG for PCI
                                Configuration
+               check_enable_amd_mmconf [X86] check for and enable
+                               properly configured MMIO access to PCI
+                               config space on AMD family 10h CPU
                nomsi           [MSI] If the PCI_MSI kernel config parameter is
                                enabled, this kernel boot option can be used to
                                disable the use of MSI interrupts system-wide.