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| author | James Morris <jmorris@namei.org> | 2009-06-19 02:20:55 +0400 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2009-06-19 02:20:55 +0400 |
| commit | d905163c5b23f6d8511971e06081a1b525e8a0bd (patch) | |
| tree | f76918c1be802ec068d37763466f5518efdb690e /drivers/char/hw_random/via-rng.c | |
| parent | 44c2d9bdd7022ca7d240d5adc009296fc1c6ce08 (diff) | |
| parent | 0732f87761dbe417cb6e084b712d07e879e876ef (diff) | |
| download | linux-d905163c5b23f6d8511971e06081a1b525e8a0bd.tar.xz | |
Merge branch 'master' into next
Diffstat (limited to 'drivers/char/hw_random/via-rng.c')
| -rw-r--r-- | drivers/char/hw_random/via-rng.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/char/hw_random/via-rng.c b/drivers/char/hw_random/via-rng.c index 4e9573c1d39e..794aacb715c1 100644 --- a/drivers/char/hw_random/via-rng.c +++ b/drivers/char/hw_random/via-rng.c @@ -132,6 +132,19 @@ static int via_rng_init(struct hwrng *rng) struct cpuinfo_x86 *c = &cpu_data(0); u32 lo, hi, old_lo; + /* VIA Nano CPUs don't have the MSR_VIA_RNG anymore. The RNG + * is always enabled if CPUID rng_en is set. There is no + * RNG configuration like it used to be the case in this + * register */ + if ((c->x86 == 6) && (c->x86_model >= 0x0f)) { + if (!cpu_has_xstore_enabled) { + printk(KERN_ERR PFX "can't enable hardware RNG " + "if XSTORE is not enabled\n"); + return -ENODEV; + } + return 0; + } + /* Control the RNG via MSR. Tread lightly and pay very close * close attention to values written, as the reserved fields * are documented to be "undefined and unpredictable"; but it @@ -205,5 +218,5 @@ static void __exit mod_exit(void) module_init(mod_init); module_exit(mod_exit); -MODULE_DESCRIPTION("H/W RNG driver for VIA chipsets"); +MODULE_DESCRIPTION("H/W RNG driver for VIA CPU with PadLock"); MODULE_LICENSE("GPL"); |