UBUNTU: SAUCE: Allow filtering of cpufreq drivers

[linux-flexiantxendom0.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 93413ce..57dfe00 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -252,12 +252,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        For broken nForce2 BIOS resulting in XT-PIC timer.
 
        acpi_sleep=     [HW,ACPI] Sleep options
-                       Format: { s3_bios, s3_mode, s3_beep, s4_nohwsig,
+                       Format: { s3_bios, s3_mode, s3_beep, s3_leds, s4_nohwsig,
                                  old_ordering, nonvs, sci_force_enable }
                        See Documentation/power/video.txt for information on
                        s3_bios and s3_mode.
                        s3_beep is for debugging; it makes the PC's speaker beep
                        as soon as the kernel's real-mode entry point is called.
+                       s3_leds is for debugging; it flashes the keyboard LEDs
+                       3 times as soon as the kernel's real-mode entry point is
+                       called.
                        s4_nohwsig prevents ACPI hardware signature from being
                        used during resume from hibernation.
                        old_ordering causes the ACPI 1.0 ordering of the _PTS
@@ -315,12 +318,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        CPU-intensive style benchmark, and it can vary highly in
                        a microbenchmark depending on workload and compiler.
 
-                       1: only for 32-bit processes
-                       2: only for 64-bit processes
+                       32: only for 32-bit processes
+                       64: only for 64-bit processes
                        on: enable for both 32- and 64-bit processes
                        off: disable for both 32- and 64-bit processes
 
-       amd_iommu=      [HW,X86-84]
+       amd_iommu=      [HW,X86-64]
                        Pass parameters to the AMD IOMMU driver in the system.
                        Possible values are:
                        fullflush - enable flushing of IO/TLB entries when
@@ -567,6 +570,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        /proc/<pid>/coredump_filter.
                        See also Documentation/filesystems/proc.txt.
 
+       cpufreq_driver= [X86] Allow only the named cpu frequency scaling driver
+                       to register. Example: cpufreq_driver=powernow-k8
+                       Format: { none | STRING }
+
        cpuidle.off=1   [CPU_IDLE]
                        disable the cpuidle sub-system
 
@@ -689,6 +696,21 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        The filter can be disabled or changed to another
                        driver later using sysfs.
 
+       drm_kms_helper.edid_firmware=[<connector>:]<file>
+                       Broken monitors, graphic adapters and KVMs may
+                       send no or incorrect EDID data sets. This parameter
+                       allows to specify an EDID data set in the
+                       /lib/firmware directory that is used instead.
+                       Generic built-in EDID data sets are used, if one of
+                       edid/1024x768.bin, edid/1280x1024.bin,
+                       edid/1680x1050.bin, or edid/1920x1080.bin is given
+                       and no file with the same name exists. Details and
+                       instructions how to build your own EDID data are
+                       available in Documentation/EDID/HOWTO.txt. An EDID
+                       data set will only be used for a particular connector,
+                       if its name and a colon are prepended to the EDID
+                       name.
+
        dscc4.setup=    [NET]
 
        earlycon=       [KNL] Output early console device and options.
@@ -741,10 +763,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        See Documentation/block/cfq-iosched.txt and
                        Documentation/block/deadline-iosched.txt for details.
 
-       elfcorehdr=     [IA-64,PPC,SH,X86]
+       elfcorehdr=[size[KMG]@]offset[KMG] [IA64,PPC,SH,X86,S390]
                        Specifies physical address of start of kernel core
-                       image elf header. Generally kexec loader will
-                       pass this option to capture kernel.
+                       image elf header and optionally the size. Generally
+                       kexec loader will pass this option to capture kernel.
                        See Documentation/kdump/kdump.txt for details.
 
        enable_mtrr_cleanup [X86]
@@ -973,6 +995,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
        ignore_loglevel [KNL]
                        Ignore loglevel setting - this will print /all/
                        kernel messages to the console. Useful for debugging.
+                       We also add it as printk module parameter, so users
+                       could change it dynamically, usually by
+                       /sys/module/printk/parameters/ignore_loglevel.
 
        ihash_entries=  [KNL]
                        Set number of hash buckets for inode cache.
@@ -1201,6 +1226,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        [KVM,Intel] Disable FlexPriority feature (TPR shadow).
                        Default is 1 (enabled)
 
+       kvm-intel.nested=
+                       [KVM,Intel] Enable VMX nesting (nVMX).
+                       Default is 0 (disabled)
+
        kvm-intel.unrestricted_guest=
                        [KVM,Intel] Disable unrestricted guest feature
                        (virtualized real and unpaged mode) on capable
@@ -1662,6 +1691,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        debugging driver suspend/resume hooks).  This may
                        not work reliably with all consoles, but is known
                        to work with serial and VGA consoles.
+                       To facilitate more flexible debugging, we also add
+                       console_suspend, a printk module parameter to control
+                       it. Users could use console_suspend (usually
+                       /sys/module/printk/parameters/console_suspend) to
+                       turn on/off it dynamically.
 
        noaliencache    [MM, NUMA, SLAB] Disables the allocation of alien
                        caches in the slab allocator.  Saves per-node memory,
@@ -2157,6 +2191,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
                        default: off.
 
+       printk.always_kmsg_dump=
+                       Trigger kmsg_dump for cases other than kernel oops or
+                       panics
+                       Format: <bool>  (1/Y/y=enable, 0/N/n=disable)
+                       default: disabled
+
        printk.time=    Show timing data prefixed to each printk message line
                        Format: <bool>  (1/Y/y=enable, 0/N/n=disable)