new file mode 100644
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_ARCHRANDOM_H
+#define _ASM_ARCHRANDOM_H
+
+static inline bool __init smccc_probe_trng(void)
+{
+ return false;
+}
+
+#endif /* _ASM_ARCHRANDOM_H */
@@ -8,6 +8,11 @@
#include <linux/kernel.h>
#include <asm/cpufeature.h>
+static inline bool __init smccc_probe_trng(void)
+{
+ return false;
+}
+
static inline bool __arm64_rndr(unsigned long *v)
{
bool ok;
@@ -79,5 +84,12 @@ arch_get_random_seed_long_early(unsigned long *v)
}
#define arch_get_random_seed_long_early arch_get_random_seed_long_early
+#else /* !CONFIG_ARCH_RANDOM */
+
+static inline bool __init smccc_probe_trng(void)
+{
+ return false;
+}
+
#endif /* CONFIG_ARCH_RANDOM */
#endif /* _ASM_ARCHRANDOM_H */
@@ -5,16 +5,22 @@
#define pr_fmt(fmt) "smccc: " fmt
+#include <linux/cache.h>
#include <linux/init.h>
#include <linux/arm-smccc.h>
+#include <asm/archrandom.h>
static u32 smccc_version = ARM_SMCCC_VERSION_1_0;
static enum arm_smccc_conduit smccc_conduit = SMCCC_CONDUIT_NONE;
+bool __ro_after_init smccc_trng_available = false;
+
void __init arm_smccc_version_init(u32 version, enum arm_smccc_conduit conduit)
{
smccc_version = version;
smccc_conduit = conduit;
+
+ smccc_trng_available = smccc_probe_trng();
}
enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void)