x86: add noclflush option

[linux-2.6-omap-h63xx.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 880f882160e2d717d9d0a7e1727ff6f29e6dcec8..040e30a33b7c5582451f95dd233d6c4692d1fe91 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -416,8 +416,8 @@ and is between 256 and 4096 characters. It is defined in the file
                        [SPARC64] tick
                        [X86-64] hpet,tsc
 
-       code_bytes      [IA32] How many bytes of object code to print in an
-                       oops report.
+       code_bytes      [IA32/X86_64] How many bytes of object code to print
+                       in an oops report.
                        Range: 0 - 8192
                        Default: 64
 
@@ -570,6 +570,12 @@ and is between 256 and 4096 characters. It is defined in the file
                        See drivers/char/README.epca and
                        Documentation/digiepca.txt.
 
+       disable_mtrr_trim [X86-64, Intel only]
+                       By default the kernel will trim any uncacheable
+                       memory out of your available memory pool based on
+                       MTRR settings.  This parameter disables that behavior,
+                       possibly causing your machine to run very slowly.
+
        dmasound=       [HW,OSS] Sound subsystem buffers
 
        dscc4.setup=    [NET]
@@ -660,6 +666,10 @@ and is between 256 and 4096 characters. It is defined in the file
 
        gamma=          [HW,DRM]
 
+       gart_fix_e820=  [X86_64] disable the fix e820 for K8 GART
+                       Format: off | on
+                       default: on
+
        gdth=           [HW,SCSI]
                        See header of drivers/scsi/gdth.c.
 
@@ -794,6 +804,16 @@ and is between 256 and 4096 characters. It is defined in the file
                        for translation below 32 bit and if not available
                        then look in the higher range.
 
+       io_delay=       [X86-32,X86-64] I/O delay method
+               0x80
+                       Standard port 0x80 based delay
+               0xed
+                       Alternate port 0xed based delay (needed on some systems)
+               udelay
+                       Simple two microseconds delay
+               none
+                       No delay
+
        io7=            [HW] IO7 for Marvel based alpha systems
                        See comment before marvel_specify_io7 in
                        arch/alpha/kernel/core_marvel.c.
@@ -1159,6 +1179,8 @@ and is between 256 and 4096 characters. It is defined in the file
 
        nodisconnect    [HW,SCSI,M68K] Disables SCSI disconnects.
 
+       noefi           [X86-32,X86-64] Disable EFI runtime services support.
+
        noexec          [IA-64]
 
        noexec          [X86-32,X86-64]
@@ -1169,6 +1191,8 @@ 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.
 
+       noclflush       [BUGS=X86] Don't use the CLFLUSH instruction
+
        nohlt           [BUGS=ARM]
 
        no-hlt          [BUGS=X86-32] Tells the kernel that the hlt
@@ -1978,6 +2002,11 @@ and is between 256 and 4096 characters. It is defined in the file
                        vdso=1: enable VDSO (default)
                        vdso=0: disable VDSO mapping
 
+       vdso32=         [X86-32,X86-64]
+                       vdso32=2: enable compat VDSO (default with COMPAT_VDSO)
+                       vdso32=1: enable 32-bit VDSO (default)
+                       vdso32=0: disable 32-bit VDSO mapping
+
        vector=         [IA-64,SMP]
                        vector=percpu: enable percpu vector domain