riscv: do not enable SMP

* SMP requires IPI to work, but noop does not implement IPI yet.

arch/riscv/configs/emu_defconfig

@@ -4,7 +4,7 @@
 #
 
 #
-# Compiler: riscv64-unknown-linux-gnu-gcc (GCC) 7.2.0
+# Compiler: riscv64-unknown-linux-gnu-gcc (GCC) 9.2.0
 #
 CONFIG_64BIT=y
 CONFIG_RISCV=y
@@ -29,8 +29,7 @@ CONFIG_ARCH_RV64I=y
 CONFIG_CMODEL_MEDLOW=y
 # CONFIG_CMODEL_MEDANY is not set
 CONFIG_MAXPHYSMEM_2GB=y
-CONFIG_SMP=y
-CONFIG_NR_CPUS=8
+# CONFIG_SMP is not set
 CONFIG_TUNE_GENERIC=y
 CONFIG_RISCV_ISA_C=y
 CONFIG_RISCV_ISA_A=y
@@ -48,6 +47,7 @@ CONFIG_SPLIT_PTLOCK_CPUS=4
 CONFIG_PHYS_ADDR_T_64BIT=y
 # CONFIG_KSM is not set
 CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
+CONFIG_NEED_PER_CPU_KM=y
 # CONFIG_CLEANCACHE is not set
 # CONFIG_CMA is not set
 # CONFIG_ZPOOL is not set
@@ -76,7 +76,7 @@ CONFIG_HZ=100
 #
 # CONFIG_PCI_ENDPOINT is not set
 CONFIG_CC_IS_GCC=y
-CONFIG_GCC_VERSION=70200
+CONFIG_GCC_VERSION=90200
 CONFIG_CLANG_VERSION=0
 CONFIG_IRQ_WORK=y
 CONFIG_THREAD_INFO_IN_TASK=y
@@ -84,6 +84,7 @@ CONFIG_THREAD_INFO_IN_TASK=y
 #
 # General setup
 #
+CONFIG_BROKEN_ON_SMP=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
 # CONFIG_COMPILE_TEST is not set
 CONFIG_LOCALVERSION=""
@@ -114,20 +115,16 @@ CONFIG_HZ_PERIODIC=y
 # CPU/Task time and stats accounting
 #
 CONFIG_TICK_CPU_ACCOUNTING=y
-# CONFIG_CPU_ISOLATION is not set
 
 #
 # RCU Subsystem
 #
-CONFIG_TREE_RCU=y
+CONFIG_TINY_RCU=y
 # CONFIG_RCU_EXPERT is not set
 CONFIG_SRCU=y
-CONFIG_TREE_SRCU=y
-CONFIG_RCU_STALL_COMMON=y
-CONFIG_RCU_NEED_SEGCBLIST=y
+CONFIG_TINY_SRCU=y
 # CONFIG_IKCONFIG is not set
 CONFIG_LOG_BUF_SHIFT=15
-CONFIG_LOG_CPU_MAX_BUF_SHIFT=12
 CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=11
 # CONFIG_CGROUPS is not set
 # CONFIG_SCHED_AUTOGROUP is not set
@@ -184,7 +181,6 @@ CONFIG_SLUB=y
 # CONFIG_SLAB_MERGE_DEFAULT is not set
 # CONFIG_SLAB_FREELIST_RANDOM is not set
 # CONFIG_SLAB_FREELIST_HARDENED is not set
-# CONFIG_SLUB_CPU_PARTIAL is not set
 # CONFIG_PROFILING is not set
 CONFIG_HAVE_64BIT_ALIGNED_ACCESS=y
 CONFIG_HAVE_ARCH_TRACEHOOK=y
@@ -642,7 +638,6 @@ CONFIG_DEBUG_KERNEL=y
 # CONFIG_DEBUG_STACK_USAGE is not set
 # CONFIG_DEBUG_VM is not set
 # CONFIG_DEBUG_MEMORY_INIT is not set
-# CONFIG_DEBUG_PER_CPU_MAPS is not set
 CONFIG_CC_HAS_SANCOV_TRACE_PC=y
 # CONFIG_DEBUG_SHIRQ is not set
 
@@ -682,7 +677,6 @@ CONFIG_PANIC_TIMEOUT=0
 #
 # CONFIG_RCU_PERF_TEST is not set
 # CONFIG_RCU_TORTURE_TEST is not set
-CONFIG_RCU_CPU_STALL_TIMEOUT=21
 # CONFIG_RCU_TRACE is not set
 # CONFIG_RCU_EQS_DEBUG is not set
 # CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set

arch/riscv/configs/fpga_defconfig

@@ -4,7 +4,7 @@
 #
 
 #
-# Compiler: riscv64-unknown-linux-gnu-gcc (GCC) 7.2.0
+# Compiler: riscv64-unknown-linux-gnu-gcc (GCC) 9.2.0
 #
 CONFIG_64BIT=y
 CONFIG_RISCV=y
@@ -31,8 +31,7 @@ CONFIG_CMODEL_MEDANY=y
 CONFIG_MODULE_SECTIONS=y
 # CONFIG_MAXPHYSMEM_2GB is not set
 CONFIG_MAXPHYSMEM_128GB=y
-CONFIG_SMP=y
-CONFIG_NR_CPUS=8
+# CONFIG_SMP is not set
 CONFIG_TUNE_GENERIC=y
 CONFIG_RISCV_ISA_C=y
 CONFIG_RISCV_ISA_A=y
@@ -56,6 +55,7 @@ CONFIG_MIGRATION=y
 CONFIG_PHYS_ADDR_T_64BIT=y
 # CONFIG_KSM is not set
 CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
+CONFIG_NEED_PER_CPU_KM=y
 # CONFIG_CLEANCACHE is not set
 # CONFIG_FRONTSWAP is not set
 # CONFIG_CMA is not set
@@ -86,7 +86,7 @@ CONFIG_ETH_XILINX_RV=y
 #
 # CONFIG_PCI_ENDPOINT is not set
 CONFIG_CC_IS_GCC=y
-CONFIG_GCC_VERSION=70200
+CONFIG_GCC_VERSION=90200
 CONFIG_CLANG_VERSION=0
 CONFIG_IRQ_WORK=y
 CONFIG_THREAD_INFO_IN_TASK=y
@@ -94,6 +94,7 @@ CONFIG_THREAD_INFO_IN_TASK=y
 #
 # General setup
 #
+CONFIG_BROKEN_ON_SMP=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
 # CONFIG_COMPILE_TEST is not set
 CONFIG_LOCALVERSION=""
@@ -131,22 +132,18 @@ CONFIG_HZ_PERIODIC=y
 CONFIG_TICK_CPU_ACCOUNTING=y
 # CONFIG_BSD_PROCESS_ACCT is not set
 # CONFIG_TASKSTATS is not set
-CONFIG_CPU_ISOLATION=y
 
 #
 # RCU Subsystem
 #
-CONFIG_TREE_RCU=y
+CONFIG_TINY_RCU=y
 # CONFIG_RCU_EXPERT is not set
 CONFIG_SRCU=y
-CONFIG_TREE_SRCU=y
-CONFIG_RCU_STALL_COMMON=y
-CONFIG_RCU_NEED_SEGCBLIST=y
+CONFIG_TINY_SRCU=y
 CONFIG_BUILD_BIN2C=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=17
-CONFIG_LOG_CPU_MAX_BUF_SHIFT=12
 CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=13
 CONFIG_CGROUPS=y
 # CONFIG_MEMCG is not set
@@ -158,7 +155,6 @@ CONFIG_CFS_BANDWIDTH=y
 # CONFIG_CGROUP_PIDS is not set
 # CONFIG_CGROUP_RDMA is not set
 # CONFIG_CGROUP_FREEZER is not set
-# CONFIG_CPUSETS is not set
 # CONFIG_CGROUP_DEVICE is not set
 # CONFIG_CGROUP_CPUACCT is not set
 # CONFIG_CGROUP_PERF is not set
@@ -237,7 +233,6 @@ CONFIG_SLUB=y
 CONFIG_SLAB_MERGE_DEFAULT=y
 # CONFIG_SLAB_FREELIST_RANDOM is not set
 # CONFIG_SLAB_FREELIST_HARDENED is not set
-CONFIG_SLUB_CPU_PARTIAL=y
 # CONFIG_PROFILING is not set
 CONFIG_HAVE_64BIT_ALIGNED_ACCESS=y
 CONFIG_HAVE_ARCH_TRACEHOOK=y
@@ -399,15 +394,11 @@ CONFIG_NETLINK_DIAG=y
 # CONFIG_NET_SWITCHDEV is not set
 # CONFIG_NET_L3_MASTER_DEV is not set
 # CONFIG_NET_NCSI is not set
-CONFIG_RPS=y
-CONFIG_RFS_ACCEL=y
-CONFIG_XPS=y
 # CONFIG_CGROUP_NET_PRIO is not set
 # CONFIG_CGROUP_NET_CLASSID is not set
 CONFIG_NET_RX_BUSY_POLL=y
 CONFIG_BQL=y
 # CONFIG_BPF_STREAM_PARSER is not set
-CONFIG_NET_FLOW_LIMIT=y
 
 #
 # Network testing
@@ -1329,7 +1320,6 @@ CONFIG_DEBUG_KERNEL=y
 # CONFIG_DEBUG_STACK_USAGE is not set
 # CONFIG_DEBUG_VM is not set
 # CONFIG_DEBUG_MEMORY_INIT is not set
-# CONFIG_DEBUG_PER_CPU_MAPS is not set
 CONFIG_CC_HAS_SANCOV_TRACE_PC=y
 # CONFIG_DEBUG_SHIRQ is not set
 
@@ -1372,7 +1362,6 @@ CONFIG_DEBUG_BUGVERBOSE=y
 #
 # CONFIG_RCU_PERF_TEST is not set
 # CONFIG_RCU_TORTURE_TEST is not set
-CONFIG_RCU_CPU_STALL_TIMEOUT=21
 # CONFIG_RCU_TRACE is not set
 # CONFIG_RCU_EQS_DEBUG is not set
 # CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
@@ -1474,7 +1463,6 @@ CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
 # CONFIG_CRYPTO_GF128MUL is not set
 CONFIG_CRYPTO_NULL=m
 CONFIG_CRYPTO_NULL2=y
-# CONFIG_CRYPTO_PCRYPT is not set
 CONFIG_CRYPTO_WORKQUEUE=y
 # CONFIG_CRYPTO_CRYPTD is not set
 # CONFIG_CRYPTO_MCRYPTD is not set
@@ -1647,7 +1635,6 @@ CONFIG_HAVE_GENERIC_DMA_COHERENT=y
 CONFIG_DMA_DIRECT_OPS=y
 CONFIG_SWIOTLB=y
 CONFIG_SGL_ALLOC=y
-CONFIG_CPU_RMAP=y
 CONFIG_DQL=y
 CONFIG_NLATTR=y
 # CONFIG_CORDIC is not set