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| author |   Ingo Molnar <mingo@kernel.org> | 2015-04-25 08:35:53 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 15:47:41 +0200 |
| commit | 2507e1c03f577173d613d6728329eb220724c577 (patch) | |
| tree | 6320b786671fc3519f384f08df6b9a5c2bffdadd /arch/x86/kernel/fpu/init.c | |
| parent | x86/fpu: Do fpu__init_system_xstate only from fpu__init_system() (diff) | |
| download | linux-dev-2507e1c03f577173d613d6728329eb220724c577.tar.xz linux-dev-2507e1c03f577173d613d6728329eb220724c577.zip | |
x86/fpu: Set up the legacy FPU init image from fpu__init_system()
The legacy FPU init image is used on older CPUs who don't run xstate init.
But the init code is called within setup_init_fpu_buf(), an xstate method.
Move this legacy init out of the xstate code and put it into fpu/init.c.
Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/fpu/init.c')
| -rw-r--r-- | arch/x86/kernel/fpu/init.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/fpu/init.c b/arch/x86/kernel/fpu/init.c index c1b2d1cfe745..30d2d5d03cb0 100644 --- a/arch/x86/kernel/fpu/init.c +++ b/arch/x86/kernel/fpu/init.c @@ -158,6 +158,12 @@ void fpu__init_system(void) /* The FPU has to be operational for some of the later FPU init activities: */ fpu__init_cpu(); + /* + * Set up the legacy init FPU context. (xstate init might overwrite this + * with a more modern format, if the CPU supports it.) + */ + fx_finit(&init_xstate_ctx.i387); + mxcsr_feature_mask_init(); fpu__init_system_xstate(); eager_fpu_init(); |