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/linux/drivers/media/platform/verisilicon/
H A Dhantro_vp8.c52 const struct v4l2_vp8_entropy *entropy = &hdr->entropy; in hantro_vp8_prob_update() local
69 dst[0] = entropy->y_mode_probs[0]; in hantro_vp8_prob_update()
70 dst[1] = entropy->y_mode_probs[1]; in hantro_vp8_prob_update()
71 dst[2] = entropy->y_mode_probs[2]; in hantro_vp8_prob_update()
72 dst[3] = entropy->y_mode_probs[3]; in hantro_vp8_prob_update()
73 dst[4] = entropy->uv_mode_probs[0]; in hantro_vp8_prob_update()
74 dst[5] = entropy->uv_mode_probs[1]; in hantro_vp8_prob_update()
75 dst[6] = entropy->uv_mode_probs[2]; in hantro_vp8_prob_update()
80 dst[0] = entropy->mv_probs[0][0]; /* is short */ in hantro_vp8_prob_update()
81 dst[1] = entropy->mv_probs[1][0]; in hantro_vp8_prob_update()
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/linux/drivers/char/
H A Drandom.c12 * - Entropy accumulation and extraction routines.
13 * - Entropy collection routines.
19 * data is then "credited" as having a certain number of bits of entropy.
20 * When enough bits of entropy are available, the hash is finalized and
23 * entropy collectors, described below, add data to the input pool.
75 * being able to wait until the RNG has collected enough entropy and
85 CRNG_EMPTY = 0, /* Little to no entropy collected */
124 /* Used by wait_for_random_bytes(), and considered an entropy collector, below. */
181 * These functions expand entropy from the entropy extracto
836 unsigned long flags, entropy = random_get_entropy(); random_pm_notification() local
867 unsigned long entropy[BLAKE2S_BLOCK_SIZE / sizeof(long)]; random_init_early() local
908 unsigned long entropy = random_get_entropy(); random_init() local
943 unsigned long entropy = random_get_entropy(); add_device_randomness() local
958 add_hwgenerator_randomness(const void * buf,size_t len,size_t entropy,bool sleep_after) add_hwgenerator_randomness() argument
1115 unsigned long entropy = random_get_entropy(); add_interrupt_randomness() local
1153 unsigned long entropy = random_get_entropy(), now = jiffies, flags; add_timer_randomness() local
1259 unsigned long entropy; global() member
1279 unsigned long entropy = random_get_entropy(); entropy_timer() local
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/linux/drivers/media/test-drivers/visl/
H A Dvisl-trace-vp8.h17 "entropy.y_mode_probs %s\n"
18 "entropy.uv_mode_probs %s\n"
19 "entropy.mv_probs {%s}",
21 __entry->f.entropy.coeff_probs,
22 sizeof(__entry->f.entropy.coeff_probs),
24 __print_array(__entry->f.entropy.y_mode_probs,
25 ARRAY_SIZE(__entry->f.entropy.y_mode_probs),
26 sizeof(__entry->f.entropy.y_mode_probs[0])),
27 __print_array(__entry->f.entropy.uv_mode_probs,
28 ARRAY_SIZE(__entry->f.entropy.uv_mode_probs),
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/linux/crypto/
H A Djitterentropy.c63 /* The entropy pool */
71 void *hash_state; /* SENSITIVE hash state entropy pool */
110 * entropy, saves MEMORY_SIZE RAM for
111 * entropy collector */
134 * The output n bits can receive more than n bits of min entropy, of course,
136 * approach the output size bits of min entropy, not attain that bound. Random
138 * output entropy (that is what SP 800-90B Section 3.1.5.1.2 attempts to bound).
142 * that a string can be considered "full entropy" if you can bound the min
143 * entropy in each bit of output to at least 1-epsilon, where epsilon is
186 * Establish the apt_cutoff based on the presumed entropy rate of in jent_apt_init()
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H A Dalgif_rng.c63 u8 *entropy; member
226 kfree_sensitive(pctx->entropy); in rng_release()
266 * Non NULL pctx->entropy means that CAVP test has been initiated on in rng_accept_parent()
269 if (IS_ENABLED(CONFIG_CRYPTO_USER_API_RNG_CAVP) && pctx->entropy) in rng_accept_parent()
285 static int __maybe_unused rng_setentropy(void *private, sockptr_t entropy, in rng_setentropy() argument
294 if (pctx->entropy) in rng_setentropy()
301 kentropy = memdup_sockptr(entropy, len); in rng_setentropy()
308 * Since rng doesn't perform any memory management for the entropy in rng_setentropy()
311 pctx->entropy = kentropy; in rng_setentropy()
H A Ddrbg.c219 * Note, this function disregards the nonce trailing the entropy data during
225 * @entropy buffer of seed data to be checked
233 const unsigned char *entropy) in drbg_fips_continuous_test() argument
250 memcpy(drbg->prev, entropy, entropylen); in drbg_fips_continuous_test()
255 ret = memcmp(drbg->prev, entropy, entropylen); in drbg_fips_continuous_test()
258 memcpy(drbg->prev, entropy, entropylen); in drbg_fips_continuous_test()
1062 unsigned char *entropy, in drbg_get_random_bytes() argument
1068 get_random_bytes(entropy, entropylen); in drbg_get_random_bytes()
1069 ret = drbg_fips_continuous_test(drbg, entropy); in drbg_get_random_bytes()
1082 unsigned char entropy[32]; in drbg_seed_from_random() local
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/linux/lib/zstd/decompress/
H A Dzstd_ddict.c37 ZSTD_entropyDTables_t entropy; member
72 dctx->LLTptr = ddict->entropy.LLTable; in ZSTD_copyDDictParameters()
73 dctx->MLTptr = ddict->entropy.MLTable; in ZSTD_copyDDictParameters()
74 dctx->OFTptr = ddict->entropy.OFTable; in ZSTD_copyDDictParameters()
75 dctx->HUFptr = ddict->entropy.hufTable; in ZSTD_copyDDictParameters()
76 dctx->entropy.rep[0] = ddict->entropy.rep[0]; in ZSTD_copyDDictParameters()
77 dctx->entropy.rep[1] = ddict->entropy.rep[1]; in ZSTD_copyDDictParameters()
78 dctx->entropy.rep[2] = ddict->entropy.rep[2]; in ZSTD_copyDDictParameters()
108 /* load entropy tables */ in ZSTD_loadEntropy_intoDDict()
110 &ddict->entropy, ddict->dictContent, ddict->dictSize)), in ZSTD_loadEntropy_intoDDict()
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H A Dzstd_decompress.c1285 * @return : size of entropy tables read */
1287 ZSTD_loadDEntropy(ZSTD_entropyDTables_t* entropy, in ZSTD_loadDEntropy() argument
1297 …entropyDTables_t, OFTable) == offsetof(ZSTD_entropyDTables_t, LLTable) + sizeof(entropy->LLTable)); in ZSTD_loadDEntropy()
1298 …entropyDTables_t, MLTable) == offsetof(ZSTD_entropyDTables_t, OFTable) + sizeof(entropy->OFTable)); in ZSTD_loadDEntropy()
1299 …ZSTD_STATIC_ASSERT(sizeof(entropy->LLTable) + sizeof(entropy->OFTable) + sizeof(entropy->MLTable) … in ZSTD_loadDEntropy()
1300 …{ void* const workspace = &entropy->LLTable; /* use fse tables as temporary workspace; implies… in ZSTD_loadDEntropy()
1301 …size_t const workspaceSize = sizeof(entropy->LLTable) + sizeof(entropy->OFTable) + sizeof(entropy-… in ZSTD_loadDEntropy()
1304 size_t const hSize = HUF_readDTableX1_wksp(entropy->hufTable, in ZSTD_loadDEntropy()
1308 size_t const hSize = HUF_readDTableX2_wksp(entropy->hufTable, in ZSTD_loadDEntropy()
1322 ZSTD_buildFSETable( entropy->OFTable, in ZSTD_loadDEntropy()
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/linux/include/uapi/linux/
H A Drandom.h17 /* Get the entropy count. */
20 /* Add to (or subtract from) the entropy count. (Superuser only.) */
23 /* Get the contents of the entropy pool. (Superuser only.) (Removed in 2.6.9-rc2.) */
27 * Write bytes into the entropy pool and add to the entropy count.
32 /* Clear entropy count to 0. (Superuser only.) */
35 /* Clear the entropy pool and associated counters. (Superuser only.) */
/linux/drivers/net/ethernet/mellanox/mlx5/core/lib/
H A Dport_tun.c92 /* Tunnel entropy calculation may be controlled either on port basis in mlx5_set_entropy()
106 /* Other applications may change the global FW entropy in mlx5_set_entropy()
107 * calculations settings. Check that the current entropy value in mlx5_set_entropy()
113 "Unexpected entropy calc setting - expected %d", in mlx5_set_entropy()
117 /* GRE requires disabling entropy calculation. if there are in mlx5_set_entropy()
128 /* if we turn on the entropy we don't need to force it anymore */ in mlx5_set_entropy()
141 * entropy capabilities and configuration.
152 /* in case entropy calculation is enabled for all tunneling in mlx5_tun_entropy_refcount_inc()
159 /* turn off the entropy only for the first GRE rule. in mlx5_tun_entropy_refcount_inc()
160 * for the next rules the entropy was already disabled in mlx5_tun_entropy_refcount_inc()
/linux/scripts/gcc-plugins/
H A Dlatent_entropy_plugin.c11 * This gcc plugin helps generate a little bit of entropy from program state,
86 .help = "disable\tturn off latent entropy instrumentation\n",
291 * entropy PRNG. When RHS is specified, the request is for perturbing the
292 * local latent entropy variable, otherwise it is for perturbing the global
293 * latent entropy variable where the two operands are already given by the
294 * local and global latent entropy variables themselves.
296 * The operation is one of add/xor/rol when instrumenting the local entropy
297 * variable and one of add/xor when perturbing the global entropy variable.
299 * entropy to the global variable than the other two operations.
457 /* 4. read the global entropy variable into local entropy */ in init_local_entropy()
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H A DKconfig33 bool "Generate some entropy during boot and runtime"
36 extract some entropy from both original and artificially created
38 there is little 'natural' source of entropy normally. The cost
42 Note that entropy extracted this way is not cryptographically
/linux/lib/zstd/compress/
H A Dzstd_compress_superblock.c18 #include "zstd_compress_internal.h" /* ZSTD_[huf|fse|entropy]CTablesMetadata_t */
85 DEBUGLOG(5, "Failed to write entropy tables %s", ZSTD_getErrorName(cSize)); in ZSTD_compressSubBlock_literal()
259 static size_t ZSTD_compressSubBlock(const ZSTD_entropyCTables_t* entropy, in ZSTD_compressSubBlock() argument
276 { size_t cLitSize = ZSTD_compressSubBlock_literal((const HUF_CElt*)entropy->huf.CTable, in ZSTD_compressSubBlock()
283 { size_t cSeqSize = ZSTD_compressSubBlock_sequences(&entropy->fse, in ZSTD_compressSubBlock()
393 const ZSTD_entropyCTables_t* entropy, in ZSTD_estimateSubBlockSize() argument
399 … &entropy->huf, &entropyMetadata->hufMetadata, in ZSTD_estimateSubBlockSize()
402 … nbSeq, &entropy->fse, &entropyMetadata->fseMetadata, in ZSTD_estimateSubBlockSize()
420 * Entropy will be written to the first block.
481 &nextCBlock->entropy, entropyMetadata, in ZSTD_compressSubBlock_multi()
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/linux/drivers/infiniband/ulp/opa_vnic/
H A Dopa_vnic_encap.c74 u16 pkey, u16 entropy, u8 sc, u8 rc, in opa_vnic_make_header() argument
81 h[3] = entropy; in opa_vnic_make_header()
446 /* opa_vnic_calc_entropy - calculate the packet entropy */
455 /* return lower 8 bits as entropy */ in opa_vnic_calc_entropy()
459 /* opa_vnic_get_def_port - get default port based on entropy */
461 u8 entropy) in opa_vnic_get_def_port() argument
465 /* Add the upper and lower 4-bits of entropy to get the flow id */ in opa_vnic_get_def_port()
466 flow_id = ((entropy & 0xf) + (entropy >> 4)); in opa_vnic_get_def_port()
487 u8 def_port, sc, rc, entropy, *hdr; in opa_vnic_encap_skb() local
493 entropy = opa_vnic_calc_entropy(skb); in opa_vnic_encap_skb()
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/linux/arch/s390/boot/
H A Dkaslr.c59 __u64 entropy[4]; in get_random() local
75 /* add entropy */ in get_random()
79 (u8 *) entropy, (u8 *) entropy, in get_random()
80 sizeof(entropy)); in get_random()
81 memcpy(prng.parm_block, entropy, sizeof(entropy)); in get_random()
/linux/tools/testing/selftests/lkdtm/
H A Dstack-entropy.sh4 # Measure kernel stack entropy by sampling via LKDTM's REPORT_STACK test.
23 log=$(mktemp -t stack-entropy-XXXXXX)
42 echo "Bits of stack entropy: $bits"
47 echo "Stack entropy is low! Booted without 'randomize_kstack_offset=y'?"
/linux/drivers/infiniband/hw/hfi1/
H A Dtrace_ibhdrs.h88 u16 *entropy, u16 *len, u16 *pkey,
94 u8 rc, u8 sc, u8 sl, u16 entropy,
138 __field(u16, entropy)
166 &__entry->entropy,
236 __entry->entropy,
297 __field(u16, entropy)
326 &__entry->entropy,
400 __entry->entropy,
/linux/arch/riscv/include/asm/
H A Darchrandom.h21 u16 *entropy = (u16 *)v; in csr_seed_long() local
32 entropy[valid_seeds++] = csr_seed & SEED_ENTROPY_MASK; in csr_seed_long()
64 * worth of entropy. in arch_get_random_seed_longs()
/linux/Documentation/arch/powerpc/
H A Dkaslr-booke32.rst20 Entropy is derived from the banner and timer base, which will change every
22 pass entropy via the /chosen/kaslr-seed node in device tree.
26 bit of the entropy to decide the index of the 64M zone. Then we chose a
/linux/drivers/char/hw_random/
H A Dcavium-rng.c41 /* Enable the RNG hardware and entropy source */ in cavium_rng_probe()
50 /* Disable the RNG hardware and entropy source */ in cavium_rng_probe()
71 /* Disable the RNG hardware and entropy source */ in cavium_rng_remove()
/linux/arch/loongarch/kernel/
H A Drelocate.c111 unsigned long entropy = random_get_entropy(); in get_random_boot() local
113 /* Attempt to create a simple but unpredictable starting entropy. */ in get_random_boot()
116 /* Add in any runtime entropy we can get */ in get_random_boot()
117 hash = rotate_xor(hash, &entropy, sizeof(entropy)); in get_random_boot()
H A Dsyscall.c71 * bits. The actual entropy will be further reduced by the compiler in do_syscall()
73 * aligned, which will remove the 4 low bits from any entropy chosen in do_syscall()
76 * The resulting 6 bits of entropy is seen in SP[9:4]. in do_syscall()
/linux/arch/x86/include/asm/
H A Dentry-common.h86 * bits. The actual entropy will be further reduced by the compiler in arch_exit_to_user_mode_prepare()
89 * low bits from any entropy chosen here. in arch_exit_to_user_mode_prepare()
91 * Therefore, final stack offset entropy will be 7 (x86_64) or in arch_exit_to_user_mode_prepare()
/linux/drivers/platform/cznic/
H A Dturris-omnia-mcu-trng.c78 * entropy, a new interrupt won't be generated, and entropy collection in omnia_mcu_register_trng()
80 * the collect entropy command (and discarding the result). in omnia_mcu_register_trng()
/linux/arch/arm64/include/asm/
H A Darchrandom.h89 * hardware backed entropy) is closer to the idea behind this in arch_get_random_seed_longs()
115 * RNDRRS is not backed by an entropy source but by a DRBG that is in arch_get_random_seed_longs()
117 * enough to implement this API if no other entropy source exists. in arch_get_random_seed_longs()

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