diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/char/agp/intel-gtt.c | 58 | ||||
| -rw-r--r-- | drivers/char/hw_random/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/char/hw_random/s390-trng.c | 9 | ||||
| -rw-r--r-- | drivers/char/hw_random/via-rng.c | 2 | ||||
| -rw-r--r-- | drivers/char/random.c | 53 |
6 files changed, 66 insertions, 59 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index 1c9ed699cbca..0f378d29dab0 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -426,7 +426,6 @@ config ADI 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 diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 79a1b65527c2..fe7e2105e766 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -744,7 +744,7 @@ static void i830_write_entry(dma_addr_t addr, unsigned int entry, writel_relaxed(addr | pte_flags, intel_private.gtt + entry); } -bool intel_enable_gtt(void) +bool intel_gmch_enable_gtt(void) { u8 __iomem *reg; @@ -787,7 +787,7 @@ bool intel_enable_gtt(void) return true; } -EXPORT_SYMBOL(intel_enable_gtt); +EXPORT_SYMBOL(intel_gmch_enable_gtt); static int i830_setup(void) { @@ -821,8 +821,8 @@ static int intel_fake_agp_free_gatt_table(struct agp_bridge_data *bridge) static int intel_fake_agp_configure(void) { - if (!intel_enable_gtt()) - return -EIO; + if (!intel_gmch_enable_gtt()) + return -EIO; intel_private.clear_fake_agp = true; agp_bridge->gart_bus_addr = intel_private.gma_bus_addr; @@ -844,20 +844,20 @@ static bool i830_check_flags(unsigned int flags) return false; } -void intel_gtt_insert_page(dma_addr_t addr, - unsigned int pg, - unsigned int flags) +void intel_gmch_gtt_insert_page(dma_addr_t addr, + unsigned int pg, + unsigned int flags) { intel_private.driver->write_entry(addr, pg, flags); readl(intel_private.gtt + pg); if (intel_private.driver->chipset_flush) intel_private.driver->chipset_flush(); } -EXPORT_SYMBOL(intel_gtt_insert_page); +EXPORT_SYMBOL(intel_gmch_gtt_insert_page); -void intel_gtt_insert_sg_entries(struct sg_table *st, - unsigned int pg_start, - unsigned int flags) +void intel_gmch_gtt_insert_sg_entries(struct sg_table *st, + unsigned int pg_start, + unsigned int flags) { struct scatterlist *sg; unsigned int len, m; @@ -879,13 +879,13 @@ void intel_gtt_insert_sg_entries(struct sg_table *st, if (intel_private.driver->chipset_flush) intel_private.driver->chipset_flush(); } -EXPORT_SYMBOL(intel_gtt_insert_sg_entries); +EXPORT_SYMBOL(intel_gmch_gtt_insert_sg_entries); #if IS_ENABLED(CONFIG_AGP_INTEL) -static void intel_gtt_insert_pages(unsigned int first_entry, - unsigned int num_entries, - struct page **pages, - unsigned int flags) +static void intel_gmch_gtt_insert_pages(unsigned int first_entry, + unsigned int num_entries, + struct page **pages, + unsigned int flags) { int i, j; @@ -905,7 +905,7 @@ static int intel_fake_agp_insert_entries(struct agp_memory *mem, if (intel_private.clear_fake_agp) { int start = intel_private.stolen_size / PAGE_SIZE; int end = intel_private.gtt_mappable_entries; - intel_gtt_clear_range(start, end - start); + intel_gmch_gtt_clear_range(start, end - start); intel_private.clear_fake_agp = false; } @@ -934,12 +934,12 @@ static int intel_fake_agp_insert_entries(struct agp_memory *mem, if (ret != 0) return ret; - intel_gtt_insert_sg_entries(&st, pg_start, type); + intel_gmch_gtt_insert_sg_entries(&st, pg_start, type); mem->sg_list = st.sgl; mem->num_sg = st.nents; } else - intel_gtt_insert_pages(pg_start, mem->page_count, mem->pages, - type); + intel_gmch_gtt_insert_pages(pg_start, mem->page_count, mem->pages, + type); out: ret = 0; @@ -949,7 +949,7 @@ out_err: } #endif -void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries) +void intel_gmch_gtt_clear_range(unsigned int first_entry, unsigned int num_entries) { unsigned int i; @@ -959,7 +959,7 @@ void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries) } wmb(); } -EXPORT_SYMBOL(intel_gtt_clear_range); +EXPORT_SYMBOL(intel_gmch_gtt_clear_range); #if IS_ENABLED(CONFIG_AGP_INTEL) static int intel_fake_agp_remove_entries(struct agp_memory *mem, @@ -968,7 +968,7 @@ static int intel_fake_agp_remove_entries(struct agp_memory *mem, if (mem->page_count == 0) return 0; - intel_gtt_clear_range(pg_start, mem->page_count); + intel_gmch_gtt_clear_range(pg_start, mem->page_count); if (intel_private.needs_dmar) { intel_gtt_unmap_memory(mem->sg_list, mem->num_sg); @@ -1431,22 +1431,22 @@ int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev, } EXPORT_SYMBOL(intel_gmch_probe); -void intel_gtt_get(u64 *gtt_total, - phys_addr_t *mappable_base, - resource_size_t *mappable_end) +void intel_gmch_gtt_get(u64 *gtt_total, + phys_addr_t *mappable_base, + resource_size_t *mappable_end) { *gtt_total = intel_private.gtt_total_entries << PAGE_SHIFT; *mappable_base = intel_private.gma_bus_addr; *mappable_end = intel_private.gtt_mappable_entries << PAGE_SHIFT; } -EXPORT_SYMBOL(intel_gtt_get); +EXPORT_SYMBOL(intel_gmch_gtt_get); -void intel_gtt_chipset_flush(void) +void intel_gmch_gtt_flush(void) { if (intel_private.driver->chipset_flush) intel_private.driver->chipset_flush(); } -EXPORT_SYMBOL(intel_gtt_chipset_flush); +EXPORT_SYMBOL(intel_gmch_gtt_flush); void intel_gmch_remove(void) { diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index b3f2d55dc551..3da8e85f8aae 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -87,7 +87,7 @@ config HW_RANDOM_BA431 config HW_RANDOM_BCM2835 tristate "Broadcom BCM2835/BCM63xx Random Number Generator support" depends on ARCH_BCM2835 || ARCH_BCM_NSP || ARCH_BCM_5301X || \ - ARCH_BCM_63XX || BCM63XX || BMIPS_GENERIC || COMPILE_TEST + ARCH_BCMBCA || BCM63XX || BMIPS_GENERIC || COMPILE_TEST default HW_RANDOM help This driver provides kernel-side support for the Random Number diff --git a/drivers/char/hw_random/s390-trng.c b/drivers/char/hw_random/s390-trng.c index 2beaa35c0d74..488808dc17a2 100644 --- a/drivers/char/hw_random/s390-trng.c +++ b/drivers/char/hw_random/s390-trng.c @@ -108,7 +108,6 @@ static ssize_t trng_counter_show(struct device *dev, { 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, @@ -118,14 +117,6 @@ static ssize_t trng_counter_show(struct device *dev, "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); diff --git a/drivers/char/hw_random/via-rng.c b/drivers/char/hw_random/via-rng.c index 7444cc146e86..a9a0a3b09c8b 100644 --- a/drivers/char/hw_random/via-rng.c +++ b/drivers/char/hw_random/via-rng.c @@ -145,7 +145,7 @@ static int via_rng_init(struct hwrng *rng) } /* Control the RNG via MSR. Tread lightly and pay very close - * close attention to values written, as the reserved fields + * attention to values written, as the reserved fields * are documented to be "undefined and unpredictable"; but it * does not say to write them as zero, so I make a guess that * we restore the values we find in the register. diff --git a/drivers/char/random.c b/drivers/char/random.c index 8c90f535d149..79d7d4e4e582 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -229,7 +229,7 @@ static void crng_reseed(void) /* * This generates a ChaCha block using the provided key, and then - * immediately overwites that key with half the block. It returns + * immediately overwrites that key with half the block. It returns * the resultant ChaCha state to the user, along with the second * half of the block containing 32 bytes of random data that may * be used; random_data_len may not be greater than 32. @@ -596,12 +596,20 @@ static void extract_entropy(void *buf, size_t len) unsigned long rdseed[32 / sizeof(long)]; size_t counter; } block; - size_t i; + size_t i, longs; - for (i = 0; i < ARRAY_SIZE(block.rdseed); ++i) { - if (!arch_get_random_seed_long(&block.rdseed[i]) && - !arch_get_random_long(&block.rdseed[i])) - block.rdseed[i] = random_get_entropy(); + for (i = 0; i < ARRAY_SIZE(block.rdseed);) { + longs = arch_get_random_seed_longs(&block.rdseed[i], ARRAY_SIZE(block.rdseed) - i); + if (longs) { + i += longs; + continue; + } + longs = arch_get_random_longs(&block.rdseed[i], ARRAY_SIZE(block.rdseed) - i); + if (longs) { + i += longs; + continue; + } + block.rdseed[i++] = random_get_entropy(); } spin_lock_irqsave(&input_pool.lock, flags); @@ -643,10 +651,10 @@ static void __cold _credit_init_bits(size_t bits) add = min_t(size_t, bits, POOL_BITS); + orig = READ_ONCE(input_pool.init_bits); do { - orig = READ_ONCE(input_pool.init_bits); new = min_t(unsigned int, POOL_BITS, orig + add); - } while (cmpxchg(&input_pool.init_bits, orig, new) != orig); + } while (!try_cmpxchg(&input_pool.init_bits, &orig, new)); if (orig < POOL_READY_BITS && new >= POOL_READY_BITS) { crng_reseed(); /* Sets crng_init to CRNG_READY under base_crng.lock. */ @@ -776,22 +784,31 @@ static struct notifier_block pm_notifier = { .notifier_call = random_pm_notifica int __init random_init(const char *command_line) { ktime_t now = ktime_get_real(); - unsigned int i, arch_bits; - unsigned long entropy; + size_t i, longs, arch_bits; + unsigned long entropy[BLAKE2S_BLOCK_SIZE / sizeof(long)]; #if defined(LATENT_ENTROPY_PLUGIN) static const u8 compiletime_seed[BLAKE2S_BLOCK_SIZE] __initconst __latent_entropy; _mix_pool_bytes(compiletime_seed, sizeof(compiletime_seed)); #endif - for (i = 0, arch_bits = BLAKE2S_BLOCK_SIZE * 8; - i < BLAKE2S_BLOCK_SIZE; i += sizeof(entropy)) { - if (!arch_get_random_seed_long_early(&entropy) && - !arch_get_random_long_early(&entropy)) { - entropy = random_get_entropy(); - arch_bits -= sizeof(entropy) * 8; + for (i = 0, arch_bits = sizeof(entropy) * 8; i < ARRAY_SIZE(entropy);) { + longs = arch_get_random_seed_longs(entropy, ARRAY_SIZE(entropy) - i); + if (longs) { + _mix_pool_bytes(entropy, sizeof(*entropy) * longs); + i += longs; + continue; } - _mix_pool_bytes(&entropy, sizeof(entropy)); + longs = arch_get_random_longs(entropy, ARRAY_SIZE(entropy) - i); + if (longs) { + _mix_pool_bytes(entropy, sizeof(*entropy) * longs); + i += longs; + continue; + } + entropy[0] = random_get_entropy(); + _mix_pool_bytes(entropy, sizeof(*entropy)); + arch_bits -= sizeof(*entropy) * 8; + ++i; } _mix_pool_bytes(&now, sizeof(now)); _mix_pool_bytes(utsname(), sizeof(*(utsname()))); @@ -1174,7 +1191,7 @@ static void __cold entropy_timer(struct timer_list *timer) */ static void __cold try_to_generate_entropy(void) { - enum { NUM_TRIAL_SAMPLES = 8192, MAX_SAMPLES_PER_BIT = 32 }; + enum { NUM_TRIAL_SAMPLES = 8192, MAX_SAMPLES_PER_BIT = HZ / 30 }; struct entropy_timer_state stack; unsigned int i, num_different = 0; unsigned long last = random_get_entropy(); |