Messages in this thread Patch in this message | | | Date | Tue, 21 Jul 2015 02:38:17 -0700 | From | tip-bot for Jan Beulich <> | Subject | [tip:x86/urgent] x86/fpu: Disable dependent CPU features on " noxsave" |
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Commit-ID: 5bc016f1abaa1c5ac0e3af23aa79faec4634a074 Gitweb: http://git.kernel.org/tip/5bc016f1abaa1c5ac0e3af23aa79faec4634a074 Author: Jan Beulich <JBeulich@suse.com> AuthorDate: Mon, 20 Jul 2015 08:49:01 +0100 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Tue, 21 Jul 2015 08:20:42 +0200
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: Jan 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: Ingo Molnar <mingo@kernel.org> --- arch/x86/kernel/fpu/init.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/x86/kernel/fpu/init.c b/arch/x86/kernel/fpu/init.c index 0b39173..1e173f6 100644 --- a/arch/x86/kernel/fpu/init.c +++ b/arch/x86/kernel/fpu/init.c @@ -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; }
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