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x86/fpu: Factor out fpu__init_system_generic()

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Factor out the generic bits from fpu__init_system().

Rename mxcsr_feature_mask_init() to fpu__init_system_mxcsr()
to bring it in line with the rest of the nomenclature.

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 2015-04-26 14:35:54 +02:00
parent b11316ed9e
commit 7218e8b723
1 changed files with 17 additions and 10 deletions
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27
arch/x86/kernel/fpu/init.c
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@ -72,7 +72,7 @@ unsigned int mxcsr_feature_mask __read_mostly = 0xffffffffu;
unsigned int xstate_size;
EXPORT_SYMBOL_GPL(xstate_size);
static void mxcsr_feature_mask_init(void)
static void fpu__init_system_mxcsr(void)
{
unsigned int mask = 0;
@ -94,6 +94,20 @@ static void mxcsr_feature_mask_init(void)
mxcsr_feature_mask &= mask;
}
/*
* Once per bootup FPU initialization sequences that will run on most x86 CPUs:
*/
static void fpu__init_system_generic(void)
{
/*
* 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);
fpu__init_system_mxcsr();
}
static void fpstate_xstate_init_size(void)
{
static bool on_boot_cpu = 1;
@ -230,18 +244,11 @@ void fpu__init_system(void)
/*
* But don't leave CR0::TS set yet, as some of the FPU setup methods depend
* on being able to execute FPU instructions that will fault on a set TS,
* such as the FXSAVE in mxcsr_feature_mask_init().
* such as the FXSAVE in fpu__init_system_mxcsr().
*/
clts();
/*
* 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_generic();
fpstate_xstate_init_size();
fpu__init_system_xstate();