Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5bc016f1 authored by Jan Beulich's avatar Jan Beulich Committed by Ingo Molnar
Browse files

x86/fpu: Disable dependent CPU features on "noxsave" 



Complete the set of dependent features that need disabling at
once: XSAVEC, AVX-512 and all currently known to the kernel
extensions to it, as well as MPX need to be disabled too.

Signed-off-by: default avatarJan Beulich <jbeulich@suse.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/55ACC40D0200007800092E6C@mail.emea.novell.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent a8965276

arch/x86/kernel/fpu/init.c

+6 −0
Original line number Diff line number Diff line
@@ -351,9 +351,15 @@ static int __init x86_noxsave_setup(char *s) 


	setup_clear_cpu_cap(X86_FEATURE_XSAVE);

	setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);

	setup_clear_cpu_cap(X86_FEATURE_XSAVEC);

	setup_clear_cpu_cap(X86_FEATURE_XSAVES);

	setup_clear_cpu_cap(X86_FEATURE_AVX);

	setup_clear_cpu_cap(X86_FEATURE_AVX2);

	setup_clear_cpu_cap(X86_FEATURE_AVX512F);

	setup_clear_cpu_cap(X86_FEATURE_AVX512PF);

	setup_clear_cpu_cap(X86_FEATURE_AVX512ER);

	setup_clear_cpu_cap(X86_FEATURE_AVX512CD);

	setup_clear_cpu_cap(X86_FEATURE_MPX);



	return 1;

}