Currently, the memory hotplug is locked automatically by all memory-related _walk() functions, but sometimes locking the memory subsystem outside of them is needed. There is no public API to do that, so it creates a dependency on shared memory config to be public. Fix this by introducing a new API to lock/unlock the memory hotplug subsystem.
Create a new common file for all things mem config, and a new API namespace rte_mcfg_*. Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com> --- lib/librte_eal/common/eal_common_mcfg.c | 34 +++++++++++++++++++ .../common/include/rte_eal_memconfig.h | 24 +++++++++++++ lib/librte_eal/common/meson.build | 1 + lib/librte_eal/freebsd/eal/Makefile | 1 + lib/librte_eal/linux/eal/Makefile | 1 + lib/librte_eal/rte_eal_version.map | 4 +++ 6 files changed, 65 insertions(+) create mode 100644 lib/librte_eal/common/eal_common_mcfg.c diff --git a/lib/librte_eal/common/eal_common_mcfg.c b/lib/librte_eal/common/eal_common_mcfg.c new file mode 100644 index 000000000..985d36cc2 --- /dev/null +++ b/lib/librte_eal/common/eal_common_mcfg.c @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2019 Intel Corporation + */ + +#include <rte_config.h> +#include <rte_eal_memconfig.h> + +void +rte_mcfg_mem_read_lock(void) +{ + struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; + rte_rwlock_read_lock(&mcfg->memory_hotplug_lock); +} + +void +rte_mcfg_mem_read_unlock(void) +{ + struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; + rte_rwlock_read_unlock(&mcfg->memory_hotplug_lock); +} + +void +rte_mcfg_mem_write_lock(void) +{ + struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; + rte_rwlock_write_lock(&mcfg->memory_hotplug_lock); +} + +void +rte_mcfg_mem_write_unlock(void) +{ + struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; + rte_rwlock_write_unlock(&mcfg->memory_hotplug_lock); +} diff --git a/lib/librte_eal/common/include/rte_eal_memconfig.h b/lib/librte_eal/common/include/rte_eal_memconfig.h index 84aabe36c..a554518ef 100644 --- a/lib/librte_eal/common/include/rte_eal_memconfig.h +++ b/lib/librte_eal/common/include/rte_eal_memconfig.h @@ -100,6 +100,30 @@ rte_eal_mcfg_wait_complete(struct rte_mem_config* mcfg) rte_pause(); } +/** + * Lock the internal EAL shared memory configuration for shared access. + */ +void +rte_mcfg_mem_read_lock(void); + +/** + * Unlock the internal EAL shared memory configuration for shared access. + */ +void +rte_mcfg_mem_read_unlock(void); + +/** + * Lock the internal EAL shared memory configuration for exclusive access. + */ +void +rte_mcfg_mem_write_lock(void); + +/** + * Unlock the internal EAL shared memory configuration for exclusive access. + */ +void +rte_mcfg_mem_write_unlock(void); + #ifdef __cplusplus } #endif diff --git a/lib/librte_eal/common/meson.build b/lib/librte_eal/common/meson.build index 0670e4102..710168b29 100644 --- a/lib/librte_eal/common/meson.build +++ b/lib/librte_eal/common/meson.build @@ -18,6 +18,7 @@ common_sources = files( 'eal_common_launch.c', 'eal_common_lcore.c', 'eal_common_log.c', + 'eal_common_mcfg.c', 'eal_common_memalloc.c', 'eal_common_memory.c', 'eal_common_memzone.c', diff --git a/lib/librte_eal/freebsd/eal/Makefile b/lib/librte_eal/freebsd/eal/Makefile index 19854ee2c..dc56af582 100644 --- a/lib/librte_eal/freebsd/eal/Makefile +++ b/lib/librte_eal/freebsd/eal/Makefile @@ -44,6 +44,7 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_FREEBSD) += eal_common_timer.c SRCS-$(CONFIG_RTE_EXEC_ENV_FREEBSD) += eal_common_memzone.c SRCS-$(CONFIG_RTE_EXEC_ENV_FREEBSD) += eal_common_log.c SRCS-$(CONFIG_RTE_EXEC_ENV_FREEBSD) += eal_common_launch.c +SRCS-$(CONFIG_RTE_EXEC_ENV_FREEBSD) += eal_common_mcfg.c SRCS-$(CONFIG_RTE_EXEC_ENV_FREEBSD) += eal_common_memalloc.c SRCS-$(CONFIG_RTE_EXEC_ENV_FREEBSD) += eal_common_memory.c SRCS-$(CONFIG_RTE_EXEC_ENV_FREEBSD) += eal_common_tailqs.c diff --git a/lib/librte_eal/linux/eal/Makefile b/lib/librte_eal/linux/eal/Makefile index 6e5261152..3b2642eb8 100644 --- a/lib/librte_eal/linux/eal/Makefile +++ b/lib/librte_eal/linux/eal/Makefile @@ -52,6 +52,7 @@ SRCS-$(CONFIG_RTE_EXEC_ENV_LINUX) += eal_common_timer.c SRCS-$(CONFIG_RTE_EXEC_ENV_LINUX) += eal_common_memzone.c SRCS-$(CONFIG_RTE_EXEC_ENV_LINUX) += eal_common_log.c SRCS-$(CONFIG_RTE_EXEC_ENV_LINUX) += eal_common_launch.c +SRCS-$(CONFIG_RTE_EXEC_ENV_LINUX) += eal_common_mcfg.c SRCS-$(CONFIG_RTE_EXEC_ENV_LINUX) += eal_common_memalloc.c SRCS-$(CONFIG_RTE_EXEC_ENV_LINUX) += eal_common_memory.c SRCS-$(CONFIG_RTE_EXEC_ENV_LINUX) += eal_common_tailqs.c diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map index 824edf0ff..faad879db 100644 --- a/lib/librte_eal/rte_eal_version.map +++ b/lib/librte_eal/rte_eal_version.map @@ -292,6 +292,10 @@ DPDK_19.08 { rte_lcore_index; rte_lcore_to_socket_id; + rte_mcfg_mem_read_lock; + rte_mcfg_mem_read_unlock; + rte_mcfg_mem_write_lock; + rte_mcfg_mem_write_unlock; } DPDK_19.05; -- 2.17.1