Changeset View

Standalone View

Show First 20 Lines • Show All 91 Lines • ▼ Show 20 Lines	__asm __volatile(
"dec %0\n\t" /* otherwise, retry-- */		"dec %0\n\t" /* otherwise, retry-- */
"jne 1b\n\t" /* and loop if retries are not exhausted */		"jne 1b\n\t" /* and loop if retries are not exhausted */
"2:"		"2:"
: "+r" (retry), "=r" (rndval) : : "cc");		: "+r" (retry), "=r" (rndval) : : "cc");
*buf = rndval;		*buf = rndval;
return (retry);		return (retry);
}		}

		static int
		x86_unimpl_store(u_long *buf __unused)
		{

		panic("%s called", __func__);
		}

DEFINE_IFUNC(static, int, x86_rng_store, (u_long *buf), static)		DEFINE_IFUNC(static, int, x86_rng_store, (u_long *buf), static)
{		{
has_rdrand = (cpu_feature2 & CPUID2_RDRAND);		has_rdrand = (cpu_feature2 & CPUID2_RDRAND);
has_rdseed = (cpu_stdext_feature & CPUID_STDEXT_RDSEED);		has_rdseed = (cpu_stdext_feature & CPUID_STDEXT_RDSEED);

if (has_rdseed)		if (has_rdseed)
return (x86_rdseed_store);		return (x86_rdseed_store);
else if (has_rdrand)		else if (has_rdrand)
return (x86_rdrand_store);		return (x86_rdrand_store);
else		else
return (NULL);		return (x86_unimpl_store);
}		}

/* It is required that buf length is a multiple of sizeof(u_long). */		/* It is required that buf length is a multiple of sizeof(u_long). */
static u_int		static u_int
random_ivy_read(void *buf, u_int c)		random_ivy_read(void *buf, u_int c)
{		{
u_long *b, rndval;		u_long *b, rndval;
u_int count;		u_int count;
▲ Show 20 Lines • Show All 44 Lines • Show Last 20 Lines