x86/fpu: Parse clearcpuid= as early XSAVE argument

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commit 0c2a3913d6 upstream.

With a followon patch we want to make clearcpuid affect the XSAVE
configuration. But xsave is currently initialized before arguments
are parsed. Move the clearcpuid= parsing into the special
early xsave argument parsing code.

Since clearcpuid= contains a = we need to keep the old __setup
around as a dummy, otherwise it would end up as a environment
variable in init's environment.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171013215645.23166-4-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Andi Kleen 2017-10-13 14:56:43 -07:00 • committed by Greg Kroah-Hartman

parent d602a3465c

commit f01d7efac7

2 changed files with 18 additions and 9 deletions

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16

arch/x86/kernel/cpu/common.c

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11

arch/x86/kernel/fpu/init.c

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