Merge remote-tracking branch 'jc_docs/docs-next'

[karo-tx-linux.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index f97071ac9b4ce70ba944e0ec08a30a769a583718..ca4f6fbc1206fe71d438d516bb7772b15780c344 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -167,7 +167,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        acpi=           [HW,ACPI,X86,ARM64]
                        Advanced Configuration and Power Interface
-                       Format: { force | off | strict | noirq | rsdt }
+                       Format: { force | off | strict | noirq | rsdt |
+                                 copy_dsdt }
                        force -- enable ACPI if default was off
                        off -- disable ACPI if default was on
                        noirq -- do not use ACPI for IRQ routing
@@ -931,11 +932,11 @@ 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.
+       drm_kms_helper.edid_firmware=[<connector>:]<file>[,[<connector>:]<file>]
+                       Broken monitors, graphic adapters, KVMs and EDIDless
+                       panels may send no or incorrect EDID data sets.
+                       This parameter allows to specify an EDID data sets
+                       in the /lib/firmware directory that are 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
@@ -944,7 +945,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        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.
+                       name. Each connector may use a unique EDID data
+                       set by separating the files with a comma.  An EDID
+                       data set with no connector name will be used for
+                       any connectors not explicitly specified.
 
        dscc4.setup=    [NET]
 
@@ -1100,6 +1104,21 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        you are really sure that your UEFI does sane gc and
                        fulfills the spec otherwise your board may brick.
 
+       efi_fake_mem=   nn[KMG]@ss[KMG]:aa[,nn[KMG]@ss[KMG]:aa,..] [EFI; X86]
+                       Add arbitrary attribute to specific memory range by
+                       updating original EFI memory map.
+                       Region of memory which aa attribute is added to is
+                       from ss to ss+nn.
+                       If efi_fake_mem=2G@4G:0x10000,2G@0x10a0000000:0x10000
+                       is specified, EFI_MEMORY_MORE_RELIABLE(0x10000)
+                       attribute is added to range 0x100000000-0x180000000 and
+                       0x10a0000000-0x1120000000.
+
+                       Using this parameter you can do debugging of EFI memmap
+                       related feature. For example, you can do debugging of
+                       Address Range Mirroring feature even if your box
+                       doesn't support it.
+
        eisa_irq_edge=  [PARISC,HW]
                        See header of drivers/parisc/eisa.c.
 
@@ -1552,6 +1571,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                hwp_only
                        Only load intel_pstate on systems which support
                        hardware P state control (HWP) if available.
+               no_acpi
+                       Don't use ACPI processor performance control objects
+                       _PSS and _PPC specified limits.
 
        intremap=       [X86-64, Intel-IOMMU]
                        on      enable Interrupt Remapping (default)
@@ -3081,9 +3103,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        cache-to-cache transfer latencies.
 
        rcutree.rcu_fanout_leaf= [KNL]
-                       Increase the number of CPUs assigned to each
-                       leaf rcu_node structure.  Useful for very large
-                       systems.
+                       Change the number of CPUs assigned to each
+                       leaf rcu_node structure.  Useful for very
+                       large systems, which will choose the value 64,
+                       and for NUMA systems with large remote-access
+                       latencies, which will choose a value aligned
+                       with the appropriate hardware boundaries.
 
        rcutree.jiffies_till_sched_qs= [KNL]
                        Set required age in jiffies for a