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| author | Ingo Molnar <mingo@kernel.org> | 2015-06-02 08:05:42 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-06-02 08:05:42 +0200 |
| commit | f407a8258610169cd8e975dba7f0b2824562014c (patch) | |
| tree | 6c87b2d168a4665411a9e16b9f481599f2db25bc /arch/x86/kernel/i387.c | |
| parent | 960d447b94b22ceba286917056871d1dac8da697 (diff) | |
| parent | c46a024ea5eb0165114dbbc8c82c29b7bcf66e71 (diff) | |
| download | linux-f407a8258610169cd8e975dba7f0b2824562014c.tar.bz2 | |
Merge branch 'linus' into sched/core, to resolve conflict
Conflicts:
arch/sparc/include/asm/topology_64.h
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/i387.c')
| -rw-r--r-- | arch/x86/kernel/i387.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index 009183276bb7..6185d3141219 100644 --- a/arch/x86/kernel/i387.c +++ b/arch/x86/kernel/i387.c @@ -173,6 +173,21 @@ static void init_thread_xstate(void) xstate_size = sizeof(struct i387_fxsave_struct); else xstate_size = sizeof(struct i387_fsave_struct); + + /* + * Quirk: we don't yet handle the XSAVES* instructions + * correctly, as we don't correctly convert between + * standard and compacted format when interfacing + * with user-space - so disable it for now. + * + * The difference is small: with recent CPUs the + * compacted format is only marginally smaller than + * the standard FPU state format. + * + * ( This is easy to backport while we are fixing + * XSAVES* support. ) + */ + setup_clear_cpu_cap(X86_FEATURE_XSAVES); } /* |