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>

diff --git a/arch/x86/kernel/fpu/init.c b/arch/x86/kernel/fpu/init.c
index 0b39173..1e173f6 100644 (file)
--- 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;
 }