x86: introduce noxsave boot parameter

[safe/jmp/linux-2.6] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index e87bdbf..fd5cac0 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1535,6 +1535,10 @@ 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.
 
+       noxsave         [BUGS=X86] Disables x86 extended register state save
+                       and restore using xsave. The kernel will fallback to
+                       enabling legacy floating-point and sse state.
+
        nohlt           [BUGS=ARM,SH] Tells the kernel that the sleep(SH) or
                        wfi(ARM) instruction doesn't work correctly and not to
                        use it. This is also useful when using JTAG debugger.