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| author | H. Peter Anvin <hpa@zytor.com> | 2011-07-31 14:02:19 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2011-07-31 14:02:19 -0700 |
| commit | 49d859d78c5aeb998b6936fcb5f288f78d713489 (patch) | |
| tree | 04b7746d1b79ab12bf94ff1eaf9ab91e74db37ef /arch/x86/kernel/cpu/Makefile | |
| parent | 628c6246d47b85f5357298601df2444d7f4dd3fd (diff) | |
| download | linux-49d859d78c5aeb998b6936fcb5f288f78d713489.tar.gz linux-49d859d78c5aeb998b6936fcb5f288f78d713489.tar.bz2 linux-49d859d78c5aeb998b6936fcb5f288f78d713489.zip | |
x86, random: Verify RDRAND functionality and allow it to be disabled
If the CPU declares that RDRAND is available, go through a guranteed
reseed sequence, and make sure that it is actually working (producing
data.) If it does not, disable the CPU feature flag.
Allow RDRAND to be disabled on the command line (as opposed to at
compile time) for a user who has special requirements with regards to
random numbers.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'arch/x86/kernel/cpu/Makefile')
| -rw-r--r-- | arch/x86/kernel/cpu/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile index 6042981d0309..0e3a82a41a66 100644 --- a/arch/x86/kernel/cpu/Makefile +++ b/arch/x86/kernel/cpu/Makefile @@ -15,6 +15,7 @@ CFLAGS_common.o := $(nostackp) obj-y := intel_cacheinfo.o scattered.o topology.o obj-y += proc.o capflags.o powerflags.o common.o obj-y += vmware.o hypervisor.o sched.o mshyperv.o +obj-y += rdrand.o obj-$(CONFIG_X86_32) += bugs.o obj-$(CONFIG_X86_64) += bugs_64.o |