x86/xsaves: Add a kernel parameter noxsaves to disable xsaves/xrstors

[mirror_ubuntu-artful-kernel.git] / arch / x86 / kernel / cpu / common.c

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index e7c4b979d504e0be9eb041b0b32f80ef7b3185fb..cdc95852532d39370b61fbb154c5087d4646d788 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -146,6 +146,7 @@ static int __init x86_xsave_setup(char *s)
 {
        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;
@@ -159,6 +160,13 @@ static int __init x86_xsaveopt_setup(char *s)
 }
 __setup("noxsaveopt", x86_xsaveopt_setup);
 
+static int __init x86_xsaves_setup(char *s)
+{
+       setup_clear_cpu_cap(X86_FEATURE_XSAVES);
+       return 1;
+}
+__setup("noxsaves", x86_xsaves_setup);
+
 #ifdef CONFIG_X86_32
 static int cachesize_override = -1;
 static int disable_x86_serial_nr = 1;