return false;
}
+#include <asm-generic/archrandom.h>
+
#endif /* _ASM_ARCHRANDOM_H */
This option enables E0PD for TTBR1 where available.
-config ARCH_RANDOM
- bool "Enable support for random number generation"
- default y
- help
- Random number generation (part of the ARMv8.5 Extensions)
- provides a high bandwidth, cryptographically secure
- hardware random number generator.
-
config ARM64_AS_HAS_MTE
# Initial support for MTE went in binutils 2.32.0, checked with
# ".arch armv8.5-a+memtag" below. However, this was incomplete
#ifndef _ASM_ARCHRANDOM_H
#define _ASM_ARCHRANDOM_H
-#ifdef CONFIG_ARCH_RANDOM
-
#include <linux/arm-smccc.h>
#include <linux/bug.h>
#include <linux/kernel.h>
}
#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 */
.cpu_enable = cpu_enable_e0pd,
},
#endif
-#ifdef CONFIG_ARCH_RANDOM
{
.desc = "Random Number Generator",
.capability = ARM64_HAS_RNG,
.sign = FTR_UNSIGNED,
.min_field_value = 1,
},
-#endif
#ifdef CONFIG_ARM64_BTI
{
.desc = "Branch Target Identification",
default "0x00000000"
endif
-config ARCH_RANDOM
- def_bool n
-
config PPC_LIB_RHEAP
bool
#ifndef _ASM_POWERPC_ARCHRANDOM_H
#define _ASM_POWERPC_ARCHRANDOM_H
-#ifdef CONFIG_ARCH_RANDOM
-
#include <asm/machdep.h>
static inline bool __must_check arch_get_random_long(unsigned long *v)
return rc;
}
-#endif /* CONFIG_ARCH_RANDOM */
#ifdef CONFIG_PPC_POWERNV
int powernv_hwrng_present(void);
ssize_t (*cpu_release)(const char *, size_t);
#endif
-#ifdef CONFIG_ARCH_RANDOM
int (*get_random_seed)(unsigned long *v);
-#endif
};
extern void e500_idle(void);
select PPC_ICS_NATIVE
select PPC_ICP_NATIVE
select PPC_UDBG_16550
- select ARCH_RANDOM
help
This option enables support for FPGA-based Microwatt implementations.
select EPAPR_BOOT
select PPC_INDIRECT_PIO
select PPC_UDBG_16550
- select ARCH_RANDOM
select CPU_FREQ
select PPC_DOORBELL
select MMU_NOTIFIER
select PPC_UDBG_16550
select PPC_DOORBELL
select HOTPLUG_CPU
- select ARCH_RANDOM
select FORCE_SMP
select SWIOTLB
default y
verification for the corresponding kernel image type being
loaded in order for this to work.
-config ARCH_RANDOM
- def_bool y
- prompt "s390 architectural random number generation API"
- help
- Enable the s390 architectural random number generation API
- to provide random data for all consumers within the Linux
- kernel.
-
- When enabled the arch_random_* functions declared in linux/random.h
- are implemented. The implementation is based on the s390 CPACF
- instruction subfunction TRNG which provides a real true random
- number generator.
-
- If unsure, say Y.
-
config KERNEL_NOBP
def_bool n
prompt "Enable modified branch prediction for the kernel by default"
# CONFIG_COMPAT is not set
CONFIG_NR_CPUS=2
CONFIG_HZ_100=y
-# CONFIG_ARCH_RANDOM is not set
# CONFIG_RELOCATABLE is not set
# CONFIG_CHSC_SCH is not set
# CONFIG_SCM_BUS is not set
obj-$(CONFIG_S390_PRNG) += prng.o
obj-$(CONFIG_CRYPTO_GHASH_S390) += ghash_s390.o
obj-$(CONFIG_CRYPTO_CRC32_S390) += crc32-vx_s390.o
-obj-$(CONFIG_ARCH_RANDOM) += arch_random.o
+obj-y += arch_random.o
crc32-vx_s390-y := crc32-vx.o crc32le-vx.o crc32be-vx.o
chacha_s390-y := chacha-glue.o chacha-s390.o
#ifndef _ASM_S390_ARCHRANDOM_H
#define _ASM_S390_ARCHRANDOM_H
-#ifdef CONFIG_ARCH_RANDOM
-
#include <linux/static_key.h>
#include <linux/atomic.h>
#include <asm/cpacf.h>
return false;
}
-#endif /* CONFIG_ARCH_RANDOM */
#endif /* _ASM_S390_ARCHRANDOM_H */
add_device_randomness(&vmms->vm, sizeof(vmms->vm[0]) * vmms->count);
memblock_free(vmms, PAGE_SIZE);
-#ifdef CONFIG_ARCH_RANDOM
if (cpacf_query_func(CPACF_PRNO, CPACF_PRNO_TRNG))
static_branch_enable(&s390_arch_random_available);
-#endif
}
/*
def_bool y
depends on X86_PAT
-config ARCH_RANDOM
- def_bool y
- prompt "x86 architectural random number generator" if EXPERT
- help
- Enable the x86 architectural RDRAND instruction
- (Intel Bull Mountain technology) to generate random numbers.
- If supported, this is a high bandwidth, cryptographically
- secure hardware random number generator.
-
config X86_UMIP
def_bool y
prompt "User Mode Instruction Prevention" if EXPERT
/*
* These are the generic interfaces; they must not be declared if the
- * stubs in <linux/random.h> are to be invoked,
- * i.e. CONFIG_ARCH_RANDOM is not defined.
+ * stubs in <linux/random.h> are to be invoked.
*/
-#ifdef CONFIG_ARCH_RANDOM
static inline bool __must_check arch_get_random_long(unsigned long *v)
{
return static_cpu_has(X86_FEATURE_RDSEED) ? rdseed_int(v) : false;
}
-extern void x86_init_rdrand(struct cpuinfo_x86 *c);
-
-#else /* !CONFIG_ARCH_RANDOM */
-
-static inline void x86_init_rdrand(struct cpuinfo_x86 *c) { }
-
-#endif /* !CONFIG_ARCH_RANDOM */
+#ifndef CONFIG_UML
+void x86_init_rdrand(struct cpuinfo_x86 *c);
+#endif
#endif /* ASM_X86_ARCHRANDOM_H */
*/
#define SANITY_CHECK_LOOPS 8
-#ifdef CONFIG_ARCH_RANDOM
void x86_init_rdrand(struct cpuinfo_x86 *c)
{
unsigned int changed = 0;
"RDRAND gives funky smelling output, might consider not using it by booting with \"nordrand\"");
}
-#endif
config RANDOM_TRUST_CPU
bool "Initialize RNG using CPU RNG instructions"
default y
- depends on ARCH_RANDOM
help
Initialize the RNG using random numbers supplied by the CPU's
RNG instructions (e.g. RDRAND), if supported and available. These
{
u64 dev_counter = atomic64_read(&trng_dev_counter);
u64 hwrng_counter = atomic64_read(&trng_hwrng_counter);
-#if IS_ENABLED(CONFIG_ARCH_RANDOM)
u64 arch_counter = atomic64_read(&s390_arch_random_counter);
return sysfs_emit(buf,
"total: %llu\n",
dev_counter, hwrng_counter, arch_counter,
dev_counter + hwrng_counter + arch_counter);
-#else
- return sysfs_emit(buf,
- "trng: %llu\n"
- "hwrng: %llu\n"
- "total: %llu\n",
- dev_counter, hwrng_counter,
- dev_counter + hwrng_counter);
-#endif
}
static DEVICE_ATTR(byte_counter, 0444, trng_counter_show, NULL);
# asm headers from the host architecutre.)
mandatory-y += atomic.h
+mandatory-y += archrandom.h
mandatory-y += barrier.h
mandatory-y += bitops.h
mandatory-y += bug.h
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_GENERIC_ARCHRANDOM_H__
+#define __ASM_GENERIC_ARCHRANDOM_H__
+
+static inline bool __must_check arch_get_random_long(unsigned long *v)
+{
+ return false;
+}
+
+static inline bool __must_check arch_get_random_int(unsigned int *v)
+{
+ return false;
+}
+
+static inline bool __must_check arch_get_random_seed_long(unsigned long *v)
+{
+ return false;
+}
+
+static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
+{
+ return false;
+}
+
+#endif
*/
#include <linux/prandom.h>
-#ifdef CONFIG_ARCH_RANDOM
-# include <asm/archrandom.h>
-#else
-static inline bool __must_check arch_get_random_long(unsigned long *v) { return false; }
-static inline bool __must_check arch_get_random_int(unsigned int *v) { return false; }
-static inline bool __must_check arch_get_random_seed_long(unsigned long *v) { return false; }
-static inline bool __must_check arch_get_random_seed_int(unsigned int *v) { return false; }
-#endif
+#include <asm/archrandom.h>
/*
* Called from the boot CPU during startup; not valid to call once
CONFIG_NO_HZ_FULL=n
CONFIG_HZ_PERIODIC=n
CONFIG_HIGH_RES_TIMERS=y
-CONFIG_ARCH_RANDOM=y
CONFIG_FILE_LOCKING=y
CONFIG_POSIX_TIMERS=y
CONFIG_DEVTMPFS=y
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