AMD IOMMU: enable device isolation per default

[mv-sheeva.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1bbcaa8982b6c2445fcfdd852f9e33702129cd8b..f2e1e7fc0ffd9cf462a2adb85e4269fc28e671a8 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -198,59 +198,42 @@ and is between 256 and 4096 characters. It is defined in the file
                        that require a timer override, but don't have
                        HPET
 
                        that require a timer override, but don't have
                        HPET
 

-       acpi.debug_layer=       [HW,ACPI]
+       acpi_backlight= [HW,ACPI]
+                       acpi_backlight=vendor
+                       acpi_backlight=video
+                       If set to vendor, prefer vendor specific driver
+                       (e.g. thinkpad_acpi, sony_acpi, etc.) instead
+                       of the ACPI video.ko driver.
+
+       acpi_display_output=    [HW,ACPI]
+                       acpi_display_output=vendor
+                       acpi_display_output=video
+                       See above.
+
+       acpi.debug_layer=       [HW,ACPI,ACPI_DEBUG]
+       acpi.debug_level=       [HW,ACPI,ACPI_DEBUG]

                        Format: <int>
                        Format: <int>

-                       Each bit of the <int> indicates an ACPI debug layer,
-                       1: enable, 0: disable. It is useful for boot time
-                       debugging. After system has booted up, it can be set
-                       via /sys/module/acpi/parameters/debug_layer.
-                       CONFIG_ACPI_DEBUG must be enabled for this to produce any output.
-                       Available bits (add the numbers together) to enable debug output
-                       for specific parts of the ACPI subsystem:
-                       0x01 utilities 0x02 hardware 0x04 events 0x08 tables
-                       0x10 namespace 0x20 parser 0x40 dispatcher
-                       0x80 executer 0x100 resources 0x200 acpica debugger
-                       0x400 os services 0x800 acpica disassembler.
-                       The number can be in decimal or prefixed with 0x in hex.
-                       Warning: Many of these options can produce a lot of
-                       output and make your system unusable. Be very careful.
-
-       acpi.debug_level=       [HW,ACPI]
-                       Format: <int>
-                       Each bit of the <int> indicates an ACPI debug level,
-                       which corresponds to the level in an ACPI_DEBUG_PRINT
-                       statement.  After system has booted up, this mask
-                       can be set via /sys/module/acpi/parameters/debug_level.
-
-                       CONFIG_ACPI_DEBUG must be enabled for this to produce
-                       any output.  The number can be in decimal or prefixed
-                       with 0x in hex.  Some of these options produce so much
-                       output that the system is unusable.
-
-                       The following global components are defined by the
-                       ACPI CA:
-                              0x01 error
-                              0x02 warn
-                              0x04 init
-                              0x08 debug object
-                              0x10 info
-                              0x20 init names
-                              0x40 parse
-                              0x80 load
-                             0x100 dispatch
-                             0x200 execute
-                             0x400 names
-                             0x800 operation region
-                            0x1000 bfield
-                            0x2000 tables
-                            0x4000 values
-                            0x8000 objects
-                           0x10000 resources
-                           0x20000 user requests
-                           0x40000 package
-                       The number can be in decimal or prefixed with 0x in hex.
-                       Warning: Many of these options can produce a lot of
-                       output and make your system unusable. Be very careful.
+                       CONFIG_ACPI_DEBUG must be enabled to produce any ACPI
+                       debug output.  Bits in debug_layer correspond to a
+                       _COMPONENT in an ACPI source file, e.g.,
+                           #define _COMPONENT ACPI_PCI_COMPONENT
+                       Bits in debug_level correspond to a level in
+                       ACPI_DEBUG_PRINT statements, e.g.,
+                           ACPI_DEBUG_PRINT((ACPI_DB_INFO, ...
+                       See Documentation/acpi/debug.txt for more information
+                       about debug layers and levels.
+
+                       Enable AML "Debug" output, i.e., stores to the Debug
+                       object while interpreting AML:
+                           acpi.debug_layer=0xffffffff acpi.debug_level=0x2
+                       Enable PCI/PCI interrupt routing info messages:
+                           acpi.debug_layer=0x400000 acpi.debug_level=0x4
+                       Enable all messages related to ACPI hardware:
+                           acpi.debug_layer=0x2 acpi.debug_level=0xffffffff
+
+                       Some values produce so much output that the system is
+                       unusable.  The "log_buf_len" parameter may be useful
+                       if you need to capture more output.

 
        acpi.power_nocheck=     [HW,ACPI]
                        Format: 1/0 enable/disable the check of power state.
 
        acpi.power_nocheck=     [HW,ACPI]
                        Format: 1/0 enable/disable the check of power state.


@@ -311,7 +294,9 @@ and is between 256 and 4096 characters. It is defined in the file
                        Possible values are:
                        isolate - enable device isolation (each device, as far
                                  as possible, will get its own protection
                        Possible values are:
                        isolate - enable device isolation (each device, as far
                                  as possible, will get its own protection

-                                 domain)
+                                 domain) [default]
+                       share - put every device behind one IOMMU into the
+                               same protection domain

                        fullflush - enable flushing of IO/TLB entries when
                                    they are unmapped. Otherwise they are
                                    flushed before they will be reused, which
                        fullflush - enable flushing of IO/TLB entries when
                                    they are unmapped. Otherwise they are
                                    flushed before they will be reused, which


@@ -646,7 +631,7 @@ and is between 256 and 4096 characters. It is defined in the file
 
        digiepca=       [HW,SERIAL]
                        See drivers/char/README.epca and
 
        digiepca=       [HW,SERIAL]
                        See drivers/char/README.epca and

-                       Documentation/digiepca.txt.
+                       Documentation/serial/digiepca.txt.

 
        disable_mtrr_cleanup [X86]
        enable_mtrr_cleanup [X86]
 
        disable_mtrr_cleanup [X86]
        enable_mtrr_cleanup [X86]


@@ -757,7 +742,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        See header of drivers/scsi/fdomain.c.
 
        floppy=         [HW]
                        See header of drivers/scsi/fdomain.c.
 
        floppy=         [HW]

-                       See Documentation/floppy.txt.
+                       See Documentation/blockdev/floppy.txt.

 
        force_pal_cache_flush
                        [IA-64] Avoid check_sal_cache_flush which may hang on
 
        force_pal_cache_flush
                        [IA-64] Avoid check_sal_cache_flush which may hang on


@@ -995,13 +980,15 @@ and is between 256 and 4096 characters. It is defined in the file
                        Format:
                        <cpu number>,...,<cpu number>
                        or
                        Format:
                        <cpu number>,...,<cpu number>
                        or

-                       <cpu number>-<cpu number>  (must be a positive range in ascending order)
+                       <cpu number>-<cpu number>
+                       (must be a positive range in ascending order)

                        or a mixture
                        <cpu number>,...,<cpu number>-<cpu number>
                        or a mixture
                        <cpu number>,...,<cpu number>-<cpu number>

+

                        This option can be used to specify one or more CPUs
                        to isolate from the general SMP balancing and scheduling
                        This option can be used to specify one or more CPUs
                        to isolate from the general SMP balancing and scheduling

-                       algorithms. The only way to move a process onto or off
-                       an "isolated" CPU is via the CPU affinity syscalls.
+                       algorithms. You can move a process onto or off an
+                       "isolated" CPU via the CPU affinity syscalls or cpuset.

                        <cpu number> begins at 0 and the maximum value is
                        "number of CPUs in system - 1".
 
                        <cpu number> begins at 0 and the maximum value is
                        "number of CPUs in system - 1".
 


@@ -1116,7 +1103,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        the same attribute, the last one is used.
 
        load_ramdisk=   [RAM] List of ramdisks to load from floppy
                        the same attribute, the last one is used.
 
        load_ramdisk=   [RAM] List of ramdisks to load from floppy

-                       See Documentation/ramdisk.txt.
+                       See Documentation/blockdev/ramdisk.txt.

 
        lockd.nlm_grace_period=P  [NFS] Assign grace period.
                        Format: <integer>
 
        lockd.nlm_grace_period=P  [NFS] Assign grace period.
                        Format: <integer>


@@ -1470,8 +1457,6 @@ and is between 256 and 4096 characters. It is defined in the file
                        Valid arguments: on, off
                        Default: on
 
                        Valid arguments: on, off
                        Default: on
 

-       noirqbalance    [X86-32,SMP,KNL] Disable kernel irq balancing
-

        noirqdebug      [X86-32] Disables the code which attempts to detect and
                        disable unhandled interrupt sources.
 
        noirqdebug      [X86-32] Disables the code which attempts to detect and
                        disable unhandled interrupt sources.
 


@@ -1613,7 +1598,7 @@ and is between 256 and 4096 characters. It is defined in the file
 
        pcd.            [PARIDE]
                        See header of drivers/block/paride/pcd.c.
 
        pcd.            [PARIDE]
                        See header of drivers/block/paride/pcd.c.

-                       See also Documentation/paride.txt.
+                       See also Documentation/blockdev/paride.txt.

 
        pci=option[,option...]  [PCI] various PCI subsystem options:
                off             [X86] don't probe for the PCI bus
 
        pci=option[,option...]  [PCI] various PCI subsystem options:
                off             [X86] don't probe for the PCI bus


@@ -1714,7 +1699,7 @@ and is between 256 and 4096 characters. It is defined in the file
        pcmv=           [HW,PCMCIA] BadgePAD 4
 
        pd.             [PARIDE]
        pcmv=           [HW,PCMCIA] BadgePAD 4
 
        pd.             [PARIDE]

-                       See Documentation/paride.txt.
+                       See Documentation/blockdev/paride.txt.

 
        pdcchassis=     [PARISC,HW] Disable/Enable PDC Chassis Status codes at
                        boot time.
 
        pdcchassis=     [PARISC,HW] Disable/Enable PDC Chassis Status codes at
                        boot time.


@@ -1722,10 +1707,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        See arch/parisc/kernel/pdc_chassis.c
 
        pf.             [PARIDE]
                        See arch/parisc/kernel/pdc_chassis.c
 
        pf.             [PARIDE]

-                       See Documentation/paride.txt.
+                       See Documentation/blockdev/paride.txt.

 
        pg.             [PARIDE]
 
        pg.             [PARIDE]

-                       See Documentation/paride.txt.
+                       See Documentation/blockdev/paride.txt.

 
        pirq=           [SMP,APIC] Manual mp-table setup
                        See Documentation/x86/i386/IO-APIC.txt.
 
        pirq=           [SMP,APIC] Manual mp-table setup
                        See Documentation/x86/i386/IO-APIC.txt.


@@ -1795,7 +1780,7 @@ and is between 256 and 4096 characters. It is defined in the file
 
        prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk
                        before loading.
 
        prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk
                        before loading.

-                       See Documentation/ramdisk.txt.
+                       See Documentation/blockdev/ramdisk.txt.

 
        psmouse.proto=  [HW,MOUSE] Highest PS2 mouse protocol extension to
                        probe for; one of (bare|imps|exps|lifebook|any).
 
        psmouse.proto=  [HW,MOUSE] Highest PS2 mouse protocol extension to
                        probe for; one of (bare|imps|exps|lifebook|any).


@@ -1815,7 +1800,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        <io>,<mss_io>,<mss_irq>,<mss_dma>,<mpu_io>,<mpu_irq>
 
        pt.             [PARIDE]
                        <io>,<mss_io>,<mss_irq>,<mss_dma>,<mpu_io>,<mpu_irq>
 
        pt.             [PARIDE]

-                       See Documentation/paride.txt.
+                       See Documentation/blockdev/paride.txt.

 
        pty.legacy_count=
                        [KNL] Number of legacy pty's. Overwrites compiled-in
 
        pty.legacy_count=
                        [KNL] Number of legacy pty's. Overwrites compiled-in


@@ -1829,10 +1814,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        See Documentation/md.txt.
 
        ramdisk_blocksize=      [RAM]
                        See Documentation/md.txt.
 
        ramdisk_blocksize=      [RAM]

-                       See Documentation/ramdisk.txt.
+                       See Documentation/blockdev/ramdisk.txt.

 
        ramdisk_size=   [RAM] Sizes of RAM disks in kilobytes
 
        ramdisk_size=   [RAM] Sizes of RAM disks in kilobytes

-                       See Documentation/ramdisk.txt.
+                       See Documentation/blockdev/ramdisk.txt.

 
        rcupdate.blimit=        [KNL,BOOT]
                        Set maximum number of finished RCU callbacks to process
 
        rcupdate.blimit=        [KNL,BOOT]
                        Set maximum number of finished RCU callbacks to process


@@ -2164,7 +2149,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        See Documentation/sonypi.txt
 
        specialix=      [HW,SERIAL] Specialix multi-serial port adapter
                        See Documentation/sonypi.txt
 
        specialix=      [HW,SERIAL] Specialix multi-serial port adapter

-                       See Documentation/specialix.txt.
+                       See Documentation/serial/specialix.txt.

 
        spia_io_base=   [HW,MTD]
        spia_fio_base=
 
        spia_io_base=   [HW,MTD]
        spia_fio_base=