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5d2bd700

Commit 5d2bd700 authored 12 years ago by Suresh Siddha Committed by H. Peter Anvin 12 years ago

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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>

parent 304bceda

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Documentation/kernel-parameters.txt 4 additions, 0 deletions

Documentation/kernel-parameters.txt
arch/x86/include/asm/cpufeature.h 2 additions, 0 deletions

arch/x86/include/asm/cpufeature.h
arch/x86/include/asm/fpu-internal.h 39 additions, 15 deletions

arch/x86/include/asm/fpu-internal.h
arch/x86/kernel/cpu/common.c 0 additions, 2 deletions

arch/x86/kernel/cpu/common.c
arch/x86/kernel/i387.c 8 additions, 17 deletions

arch/x86/kernel/i387.c
arch/x86/kernel/process.c 1 addition, 1 deletion

arch/x86/kernel/process.c
arch/x86/kernel/traps.c 1 addition, 1 deletion

arch/x86/kernel/traps.c
arch/x86/kernel/xsave.c 57 additions, 30 deletions

arch/x86/kernel/xsave.c

with 112 additions and 66 deletions

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