Commit 5856afed authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86/fpu/init: Clean up and comment the __setup() functions 



Explain the functions and also standardize their style
and naming.

No change in functionality.

Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
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>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 7cf82d33

arch/x86/kernel/fpu/init.c

+25 −10
Original line number Diff line number Diff line
@@ -284,42 +284,57 @@ static int __init no_387(char *s) 
	setup_clear_cpu_cap(X86_FEATURE_FPU);

	return 1;

}



__setup("no387", no_387);



static int __init x86_xsave_setup(char *s)

/*

 * Disable all xstate CPU features:

 */

static int __init x86_noxsave_setup(char *s)

{

	if (strlen(s))

		return 0;



	setup_clear_cpu_cap(X86_FEATURE_XSAVE);

	setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);

	setup_clear_cpu_cap(X86_FEATURE_XSAVES);

	setup_clear_cpu_cap(X86_FEATURE_AVX);

	setup_clear_cpu_cap(X86_FEATURE_AVX2);



	return 1;

}

__setup("noxsave", x86_xsave_setup);

__setup("noxsave", x86_noxsave_setup);



static int __init x86_xsaveopt_setup(char *s)

/*

 * Disable the XSAVEOPT instruction specifically:

 */

static int __init x86_noxsaveopt_setup(char *s)

{

	setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);



	return 1;

}

__setup("noxsaveopt", x86_xsaveopt_setup);

__setup("noxsaveopt", x86_noxsaveopt_setup);



static int __init x86_xsaves_setup(char *s)

/*

 * Disable the XSAVES instruction:

 */

static int __init x86_noxsaves_setup(char *s)

{

	setup_clear_cpu_cap(X86_FEATURE_XSAVES);



	return 1;

}

__setup("noxsaves", x86_xsaves_setup);

__setup("noxsaves", x86_noxsaves_setup);



static int __init x86_fxsr_setup(char *s)

/*

 * Disable FX save/restore and SSE support:

 */

static int __init x86_nofxsr_setup(char *s)

{

	setup_clear_cpu_cap(X86_FEATURE_FXSR);

	setup_clear_cpu_cap(X86_FEATURE_FXSR_OPT);

	setup_clear_cpu_cap(X86_FEATURE_XMM);



	return 1;

}

__setup("nofxsr", x86_fxsr_setup);

__setup("nofxsr", x86_nofxsr_setup);

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