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x86/fpu: Set up the legacy FPU init image from fpu__init_system()

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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>
This commit is contained in:
Ingo Molnar 2015-04-25 08:35:53 +02:00
parent 429ced50a0
commit 2507e1c03f
2 changed files with 6 additions and 6 deletions
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6
arch/x86/kernel/fpu/init.c
View File

@ -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();

6
arch/x86/kernel/fpu/xsave.c
View File

@ -576,12 +576,6 @@ static void setup_init_fpu_buf(void)
return;
on_boot_cpu = 0;
/*
* Setup init_xstate_ctx to represent the init state of
* all the features managed by the xsave
*/
fx_finit(&init_xstate_ctx.i387);
if (!cpu_has_xsave)
return;