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| author | H. Peter Anvin <hpa@linux.intel.com> | 2014-05-11 20:25:20 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2014-05-11 20:25:20 -0700 |
| commit | 7a5091d58419b4e5222abce58a40c072786ea1d6 (patch) | |
| tree | 5539029ddca915b6c5d1e4e688e2943393c3f811 /arch | |
| parent | d6d211db37e75de2ddc3a4f979038c40df7cc79c (diff) | |
| download | linux-stable-7a5091d58419b4e5222abce58a40c072786ea1d6.tar.gz linux-stable-7a5091d58419b4e5222abce58a40c072786ea1d6.tar.bz2 linux-stable-7a5091d58419b4e5222abce58a40c072786ea1d6.zip | |
x86, rdrand: When nordrand is specified, disable RDSEED as well
One can logically expect that when the user has specified "nordrand",
the user doesn't want any use of the CPU random number generator,
neither RDRAND nor RDSEED, so disable both.
Reported-by: Stephan Mueller <smueller@chronox.de>
Cc: Theodore Ts'o <tytso@mit.edu>
Link: http://lkml.kernel.org/r/21542339.0lFnPSyGRS@myon.chronox.de
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/rdrand.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/rdrand.c b/arch/x86/kernel/cpu/rdrand.c index 384df5105fbc..136ac74dee82 100644 --- a/arch/x86/kernel/cpu/rdrand.c +++ b/arch/x86/kernel/cpu/rdrand.c @@ -27,6 +27,7 @@ static int __init x86_rdrand_setup(char *s) { setup_clear_cpu_cap(X86_FEATURE_RDRAND); + setup_clear_cpu_cap(X86_FEATURE_RDSEED); return 1; } __setup("nordrand", x86_rdrand_setup); |