From cf9610f9116d55c5a66ef9f1faecacabd93a9322 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 24 Aug 2026 08:46:03 -0700 Subject: Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ... --- crypto/rng.c | 245 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 245 insertions(+) create mode 100644 crypto/rng.c (limited to 'crypto/rng.c') diff --git a/crypto/rng.c b/crypto/rng.c new file mode 100644 index 000000000..828b0d807 --- /dev/null +++ b/crypto/rng.c @@ -0,0 +1,245 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Cryptographic API. + * + * RNG operations. + * + * Copyright (c) 2008 Neil Horman + * Copyright (c) 2015 Herbert Xu + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "internal.h" + +static DEFINE_MUTEX(crypto_default_rng_lock); +static struct crypto_rng *crypto_default_rng; +static int crypto_default_rng_refcnt; + +int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, unsigned int slen) +{ + u8 *buf = NULL; + int err; + + if (!seed && slen) { + buf = kmalloc(slen, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + err = get_random_bytes_wait(buf, slen); + if (err) + goto out; + seed = buf; + } + + err = crypto_rng_alg(tfm)->seed(tfm, seed, slen); +out: + kfree_sensitive(buf); + return err; +} +EXPORT_SYMBOL_GPL(crypto_rng_reset); + +static int crypto_rng_init_tfm(struct crypto_tfm *tfm) +{ + return 0; +} + +static unsigned int seedsize(struct crypto_alg *alg) +{ + struct rng_alg *ralg = container_of(alg, struct rng_alg, base); + + return ralg->seedsize; +} + +static int __maybe_unused crypto_rng_report( + struct sk_buff *skb, struct crypto_alg *alg) +{ + struct crypto_report_rng rrng = { + .type = "rng", + }; + + rrng.seedsize = seedsize(alg); + + return nla_put(skb, CRYPTOCFGA_REPORT_RNG, sizeof(rrng), &rrng); +} + +static void __maybe_unused crypto_rng_show(struct seq_file *m, + struct crypto_alg *alg) +{ + seq_printf(m, "type : rng\n"); + seq_printf(m, "seedsize : %u\n", seedsize(alg)); +} + +static const struct crypto_type crypto_rng_type = { + .extsize = crypto_alg_extsize, + .init_tfm = crypto_rng_init_tfm, +#ifdef CONFIG_PROC_FS + .show = crypto_rng_show, +#endif +#if IS_ENABLED(CONFIG_CRYPTO_USER) + .report = crypto_rng_report, +#endif + .maskclear = ~CRYPTO_ALG_TYPE_MASK, + .maskset = CRYPTO_ALG_TYPE_MASK, + .type = CRYPTO_ALG_TYPE_RNG, + .tfmsize = offsetof(struct crypto_rng, base), + .algsize = offsetof(struct rng_alg, base), +}; + +struct crypto_rng *crypto_alloc_rng(const char *alg_name, u32 type, u32 mask) +{ + return crypto_alloc_tfm(alg_name, &crypto_rng_type, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_alloc_rng); + +static int crypto_get_default_rng(void) +{ + struct crypto_rng *rng; + int err; + + mutex_lock(&crypto_default_rng_lock); + if (!crypto_default_rng) { + rng = crypto_alloc_rng("stdrng", 0, 0); + err = PTR_ERR(rng); + if (IS_ERR(rng)) + goto unlock; + + err = crypto_rng_reset(rng, NULL, crypto_rng_seedsize(rng)); + if (err) { + crypto_free_rng(rng); + goto unlock; + } + + crypto_default_rng = rng; + } + + crypto_default_rng_refcnt++; + err = 0; + +unlock: + mutex_unlock(&crypto_default_rng_lock); + + return err; +} + +static void crypto_put_default_rng(void) +{ + mutex_lock(&crypto_default_rng_lock); + crypto_default_rng_refcnt--; + mutex_unlock(&crypto_default_rng_lock); +} + +int __crypto_stdrng_get_bytes(void *buf, unsigned int len) +{ + int err; + + err = crypto_get_default_rng(); + if (err) + return err; + + err = crypto_rng_get_bytes(crypto_default_rng, buf, len); + crypto_put_default_rng(); + return err; +} +EXPORT_SYMBOL_GPL(__crypto_stdrng_get_bytes); + +#if defined(CONFIG_CRYPTO_RNG) || defined(CONFIG_CRYPTO_RNG_MODULE) +int crypto_del_default_rng(void) +{ + int err = -EBUSY; + + mutex_lock(&crypto_default_rng_lock); + if (crypto_default_rng_refcnt) + goto out; + + crypto_free_rng(crypto_default_rng); + crypto_default_rng = NULL; + + err = 0; + +out: + mutex_unlock(&crypto_default_rng_lock); + + return err; +} +EXPORT_SYMBOL_GPL(crypto_del_default_rng); +#endif + +static void rng_default_set_ent(struct crypto_rng *tfm, const u8 *data, + unsigned int len) +{ +} + +int crypto_register_rng(struct rng_alg *alg) +{ + struct crypto_alg *base = &alg->base; + + if (alg->seedsize > PAGE_SIZE / 8) + return -EINVAL; + + base->cra_type = &crypto_rng_type; + base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; + base->cra_flags |= CRYPTO_ALG_TYPE_RNG; + + if (!alg->set_ent) + alg->set_ent = rng_default_set_ent; + + return crypto_register_alg(base); +} +EXPORT_SYMBOL_GPL(crypto_register_rng); + +void crypto_unregister_rng(struct rng_alg *alg) +{ + crypto_unregister_alg(&alg->base); +} +EXPORT_SYMBOL_GPL(crypto_unregister_rng); + +int crypto_register_rngs(struct rng_alg *algs, int count) +{ + int i, ret; + + for (i = 0; i < count; i++) { + ret = crypto_register_rng(algs + i); + if (ret) { + crypto_unregister_rngs(algs, i); + return ret; + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(crypto_register_rngs); + +void crypto_unregister_rngs(struct rng_alg *algs, int count) +{ + int i; + + for (i = count - 1; i >= 0; --i) + crypto_unregister_rng(algs + i); +} +EXPORT_SYMBOL_GPL(crypto_unregister_rngs); + +static void __exit rng_exit(void) +{ + int err; + + err = crypto_del_default_rng(); + if (err) + pr_err("Failed delete default RNG: %d\n", err); +} + +module_exit(rng_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Random Number Generator"); -- cgit v1.3.1