Loading drivers/soc/qcom/Kconfig +8 −0 Original line number Diff line number Diff line Loading @@ -247,6 +247,14 @@ config QCOM_SECURE_BUFFER use this memory and no unauthorized access is made to the buffer config QCOM_EARLY_RANDOM bool "Initialize random pool very early" help The standard random pool may not initialize until late in the boot process which means that any calls to get random numbers before then may not be truly random. Select this option to make an early call to get some random data to put in the pool. If unsure, say N. config MSM_SMEM depends on ARCH_QCOM depends on REMOTE_SPINLOCK_MSM Loading drivers/soc/qcom/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -13,6 +13,7 @@ obj-$(CONFIG_QCOM_SMSM) += smsm.o obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o CFLAGS_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1) obj-$(CONFIG_QCOM_SCM) += scm.o scm-boot.o obj-$(CONFIG_QCOM_EARLY_RANDOM) += early_random.o obj-$(CONFIG_SOC_BUS) += socinfo.o obj-$(CONFIG_MSM_BOOT_STATS) += boot_stats.o obj-$(CONFIG_MSM_CORE_HANG_DETECT) += core_hang_detect.o Loading drivers/soc/qcom/early_random.c 0 → 100644 +63 −0 Original line number Diff line number Diff line /* Copyright (c) 2013-2014, 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include <linux/kernel.h> #include <linux/random.h> #include <linux/io.h> #include <soc/qcom/scm.h> #include <asm/cacheflush.h> #define TZ_SVC_CRYPTO 10 #define PRNG_CMD_ID 0x01 struct tz_prng_data { uint8_t *out_buf; uint32_t out_buf_sz; } __packed; DEFINE_SCM_BUFFER(common_scm_buf) #define RANDOM_BUFFER_SIZE PAGE_SIZE char random_buffer[RANDOM_BUFFER_SIZE] __aligned(PAGE_SIZE); void __init init_random_pool(void) { struct tz_prng_data data; int ret; u32 resp; struct scm_desc desc; data.out_buf = (uint8_t *) virt_to_phys(random_buffer); desc.args[0] = (unsigned long) data.out_buf; desc.args[1] = data.out_buf_sz = SZ_512; desc.arginfo = SCM_ARGS(2, SCM_RW, SCM_VAL); dmac_flush_range(random_buffer, random_buffer + RANDOM_BUFFER_SIZE); if (!is_scm_armv8()) ret = scm_call_noalloc(TZ_SVC_CRYPTO, PRNG_CMD_ID, &data, sizeof(data), &resp, sizeof(resp), common_scm_buf, SCM_BUFFER_SIZE(common_scm_buf)); else ret = scm_call2(SCM_SIP_FNID(TZ_SVC_CRYPTO, PRNG_CMD_ID), &desc); if (!ret) { dmac_inv_range(random_buffer, random_buffer + RANDOM_BUFFER_SIZE); add_device_randomness(random_buffer, SZ_512); } } Loading
drivers/soc/qcom/Kconfig +8 −0 Original line number Diff line number Diff line Loading @@ -247,6 +247,14 @@ config QCOM_SECURE_BUFFER use this memory and no unauthorized access is made to the buffer config QCOM_EARLY_RANDOM bool "Initialize random pool very early" help The standard random pool may not initialize until late in the boot process which means that any calls to get random numbers before then may not be truly random. Select this option to make an early call to get some random data to put in the pool. If unsure, say N. config MSM_SMEM depends on ARCH_QCOM depends on REMOTE_SPINLOCK_MSM Loading
drivers/soc/qcom/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -13,6 +13,7 @@ obj-$(CONFIG_QCOM_SMSM) += smsm.o obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o CFLAGS_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1) obj-$(CONFIG_QCOM_SCM) += scm.o scm-boot.o obj-$(CONFIG_QCOM_EARLY_RANDOM) += early_random.o obj-$(CONFIG_SOC_BUS) += socinfo.o obj-$(CONFIG_MSM_BOOT_STATS) += boot_stats.o obj-$(CONFIG_MSM_CORE_HANG_DETECT) += core_hang_detect.o Loading
drivers/soc/qcom/early_random.c 0 → 100644 +63 −0 Original line number Diff line number Diff line /* Copyright (c) 2013-2014, 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include <linux/kernel.h> #include <linux/random.h> #include <linux/io.h> #include <soc/qcom/scm.h> #include <asm/cacheflush.h> #define TZ_SVC_CRYPTO 10 #define PRNG_CMD_ID 0x01 struct tz_prng_data { uint8_t *out_buf; uint32_t out_buf_sz; } __packed; DEFINE_SCM_BUFFER(common_scm_buf) #define RANDOM_BUFFER_SIZE PAGE_SIZE char random_buffer[RANDOM_BUFFER_SIZE] __aligned(PAGE_SIZE); void __init init_random_pool(void) { struct tz_prng_data data; int ret; u32 resp; struct scm_desc desc; data.out_buf = (uint8_t *) virt_to_phys(random_buffer); desc.args[0] = (unsigned long) data.out_buf; desc.args[1] = data.out_buf_sz = SZ_512; desc.arginfo = SCM_ARGS(2, SCM_RW, SCM_VAL); dmac_flush_range(random_buffer, random_buffer + RANDOM_BUFFER_SIZE); if (!is_scm_armv8()) ret = scm_call_noalloc(TZ_SVC_CRYPTO, PRNG_CMD_ID, &data, sizeof(data), &resp, sizeof(resp), common_scm_buf, SCM_BUFFER_SIZE(common_scm_buf)); else ret = scm_call2(SCM_SIP_FNID(TZ_SVC_CRYPTO, PRNG_CMD_ID), &desc); if (!ret) { dmac_inv_range(random_buffer, random_buffer + RANDOM_BUFFER_SIZE); add_device_randomness(random_buffer, SZ_512); } }
