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| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2012-09-06 23:58:52 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-09-19 00:52:22 +0200 |
| commit | 5d2bd7009f306c82afddd1ca4d9763ad8473c216 (patch) | |
| tree | 772bc888c48766b892e216c19e938c82657e2b0e /Documentation/kernel-parameters.txt | |
| parent | x86, fpu: use non-lazy fpu restore for processors supporting xsave (diff) | |
| download | linux-5d2bd7009f306c82afddd1ca4d9763ad8473c216.tar.xz linux-5d2bd7009f306c82afddd1ca4d9763ad8473c216.zip | |
x86, fpu: decouple non-lazy/eager fpu restore from xsave
Decouple non-lazy/eager fpu restore policy from the existence of the xsave
feature. Introduce a synthetic CPUID flag to represent the eagerfpu
policy. "eagerfpu=on" boot paramter will enable the policy.
Requested-by: H. Peter Anvin <hpa@zytor.com>
Requested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Link: http://lkml.kernel.org/r/1347300665-6209-2-git-send-email-suresh.b.siddha@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index ad7e2e5088c1..741d064fdc6a 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1833,6 +1833,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. and restore using xsave. The kernel will fallback to enabling legacy floating-point and sse state. + eagerfpu= [X86] + on enable eager fpu restore + off disable eager fpu restore + 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. |