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Subject[PATCH 03/12] SFI: document boot param "sfi=off"
From: Feng Tang <>

"sfi=off" is analogous to "acpi=off"

In practice, "sfi=off" isn't likely to be very useful, for
1. SFI is used only when ACPI is not available
2. Today's SFI systems are not legacy PC-compatible

ie. "sfi=off" on an ACPI-platform is a NO-OP,
and "sfi=off" on an SFI-platform will likely result in boot failure.

Signed-off-by: Feng Tang <>
Signed-off-by: Len Brown <>
Documentation/kernel-parameters.txt | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index d77fbd8..68337e6 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -92,6 +92,7 @@ parameter is applicable:
SECURITY Different security models are enabled.
SELINUX SELinux support is enabled.
SERIAL Serial support is enabled.
+ SFI Simple Firmware Interface
SH SuperH architecture is enabled.
SMP The kernel is an SMP kernel.
SPARC Sparc architecture is enabled.
@@ -2162,6 +2163,10 @@ and is between 256 and 4096 characters. It is defined in the file
If enabled at boot time, /selinux/disable can be used
later to disable prior to initial policy load.

+ sfi= [SFI,X86] Simple Firmware Interface
+ Format: { "off" }
+ off -- disable SFI
serialnumber [BUGS=X86-32]

shapers= [NET]

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