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>

1 files changed, 3 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 395d1a013ebb..8a82489d9a81 100644
--- 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.