2  * RNG driver for VIA RNGs
8  * Hardware driver for the Intel/AMD/VIA Random Number Generators (RNG)
13  * Hardware driver for the AMD 768 Random Number Generator (RNG)
18  * Hardware driver for Intel i810 Random Number Generator (RNG)
71  * instead of the current u8-at-a-time.
87 static int via_rng_data_present(struct hwrng *rng, int wait)  in via_rng_data_present()  argument
89 	char buf[16 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__  in via_rng_data_present()
95 	/* We choose the recommended 1-byte-per-instruction RNG rate,  in via_rng_data_present()
97 	 * values 2, 4, or 8 bytes-per-instruction yield greater  in via_rng_data_present()
101 	 * change the ->n_bytes values in rng_vendor_ops[] tables.  in via_rng_data_present()
116 	rng->priv = *via_rng_datum;  in via_rng_data_present()
120 static int via_rng_data_read(struct hwrng *rng, u32 *data)  in via_rng_data_read()  argument
122 	u32 via_rng_datum = (u32)rng->priv;  in via_rng_data_read()
129 static int via_rng_init(struct hwrng *rng)  in via_rng_init()  argument
134 	/* VIA Nano CPUs don't have the MSR_VIA_RNG anymore.  The RNG  in via_rng_init()
136 	 * RNG configuration like it used to be the case in this  in via_rng_init()
138 	if (((c->x86 == 6) && (c->x86_model >= 0x0f))  || (c->x86 > 6)){  in via_rng_init()
140 			pr_err(PFX "can't enable hardware RNG "  in via_rng_init()
142 			return -ENODEV;  in via_rng_init()
147 	/* Control the RNG via MSR.  Tread lightly and pay very close  in via_rng_init()
165 	if ((c->x86_model == 9) && (c->x86_stepping > 7))  in via_rng_init()
169 	if (c->x86_model >= 10)  in via_rng_init()
175 	/* perhaps-unnecessary sanity check; remove after testing if  in via_rng_init()
179 		pr_err(PFX "cannot enable VIA C3 RNG, aborting\n");  in via_rng_init()
180 		return -ENODEV;  in via_rng_init()
200 		return -ENODEV;  in via_rng_mod_init()
202 	pr_info("VIA RNG detected\n");  in via_rng_mod_init()
205 		pr_err(PFX "RNG registering failed (%d)\n",  in via_rng_mod_init()
226 MODULE_DESCRIPTION("H/W RNG driver for VIA CPU with PadLock");