x86/PCI: add description for check_enable_amd_mmconf boot parameter

[cascardo/linux.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 90b3924..8a82489 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -17,6 +17,12 @@ are specified on the kernel command line with the module name plus
 
        usbcore.blinkenlights=1
 
+Hyphens (dashes) and underscores are equivalent in parameter names, so
+       log_buf_len=1M print-fatal-signals=1
+can also be entered as
+       log-buf-len=1M print_fatal_signals=1
+
+
 This document may not be entirely up to date and comprehensive. The command
 "modinfo -p ${modulename}" shows a current list of all parameters of a loadable
 module. Loadable modules, after being loaded into the running kernel, also
@@ -345,7 +351,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        not play well with APC CPU idle - disable it if you have
                        APC and your system crashes randomly.
 
-       apic=           [APIC,i386] Advanced Programmable Interrupt Controller
+       apic=           [APIC,X86-32] Advanced Programmable Interrupt Controller
                        Change the output verbosity whilst booting
                        Format: { quiet (default) | verbose | debug }
                        Change the amount of debugging information output
@@ -702,7 +708,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        to discrete, to make X server driver able to add WB
                        entry later. This parameter enables that.
 
-       enable_timer_pin_1 [i386,x86-64]
+       enable_timer_pin_1 [X86]
                        Enable PIN 1 of APIC timer
                        Can be useful to work around chipset bugs
                        (in particular on some ATI chipsets).
@@ -775,7 +781,7 @@ and is between 256 and 4096 characters. It is defined in the file
 
        hashdist=       [KNL,NUMA] Large hashes allocated during boot
                        are distributed across NUMA nodes.  Defaults on
-                       for IA-64, off otherwise.
+                       for 64bit NUMA, off otherwise.
                        Format: 0 | 1 (for off | on)
 
        hcl=            [IA-64] SGI's Hardware Graph compatibility layer
@@ -1529,6 +1535,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        register save and restore. The kernel will only save
                        legacy floating-point registers on task switch.
 
+       noxsave         [BUGS=X86] Disables x86 extended register state save
+                       and restore using xsave. The kernel will fallback to
+                       enabling legacy floating-point and sse state.
+
        nohlt           [BUGS=ARM,SH] Tells the kernel that the sleep(SH) or
                        wfi(ARM) instruction doesn't work correctly and not to
                        use it. This is also useful when using JTAG debugger.
@@ -1725,6 +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.
@@ -1777,7 +1790,7 @@ and is between 256 and 4096 characters. It is defined in the file
                                IRQ routing is enabled.
                noacpi          [X86] Do not use ACPI for IRQ routing
                                or for PCI scanning.
-               use_crs         [X86] Use _CRS for PCI resource
+               nocrs           [X86] Don't use _CRS for PCI resource
                                allocation.
                routeirq        Do IRQ routing for all PCI devices.
                                This is normally done in pci_enable_device(),
@@ -1814,6 +1827,12 @@ and is between 256 and 4096 characters. It is defined in the file
                                PAGE_SIZE is used as alignment.
                                PCI-PCI bridge can be specified, if resource
                                windows need to be expanded.
+               ecrc=           Enable/disable PCIe ECRC (transaction layer
+                               end-to-end CRC checking).
+                               bios: Use BIOS/firmware settings. This is the
+                               the default.
+                               off: Turn ECRC off
+                               on: Turn ECRC on.
 
        pcie_aspm=      [PCIE] Forcibly enable or disable PCIe Active State Power
                        Management.