Index: linux-5.16.0-rt19/arch/riscv/Kconfig
===================================================================
--- linux-5.16.0-rt19.orig/arch/riscv/Kconfig
+++ linux-5.16.0-rt19/arch/riscv/Kconfig
@@ -13,6 +13,8 @@ config 32BIT
 config RISCV
 	def_bool y
 	select ARCH_CLOCKSOURCE_INIT
+	select ARCH_SUPPORTS_RT if HAVE_POSIX_CPU_TIMERS_TASK_WORK
+	select HAVE_POSIX_CPU_TIMERS_TASK_WORK if !KVM
 	select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
 	select ARCH_HAS_BINFMT_FLAT
 	select ARCH_HAS_DEBUG_VM_PGTABLE