diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
index 9b047899791ce8..c180a647a30e44 100644
--- a/arch/riscv/kernel/smp.c
+++ b/arch/riscv/kernel/smp.c
@@ -13,6 +13,7 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/kexec.h>
+#include <linux/kgdb.h>
 #include <linux/percpu.h>
 #include <linux/profile.h>
 #include <linux/smp.h>
@@ -35,6 +36,7 @@ enum ipi_message_type {
 	IPI_IRQ_WORK,
 	IPI_TIMER,
 	IPI_CPU_BACKTRACE,
+	IPI_KGDB_ROUNDUP,
 	IPI_MAX
 };
 
@@ -115,6 +117,7 @@ void arch_irq_work_raise(void)
 
 static irqreturn_t handle_IPI(int irq, void *data)
 {
+	unsigned int cpu = smp_processor_id();
 	int ipi = irq - ipi_virq_base;
 
 	switch (ipi) {
@@ -128,7 +131,7 @@ static irqreturn_t handle_IPI(int irq, void *data)
 		ipi_stop();
 		break;
 	case IPI_CPU_CRASH_STOP:
-		ipi_cpu_crash_stop(smp_processor_id(), get_irq_regs());
+		ipi_cpu_crash_stop(cpu, get_irq_regs());
 		break;
 	case IPI_IRQ_WORK:
 		irq_work_run();
@@ -141,8 +144,11 @@ static irqreturn_t handle_IPI(int irq, void *data)
 	case IPI_CPU_BACKTRACE:
 		nmi_cpu_backtrace(get_irq_regs());
 		break;
+	case IPI_KGDB_ROUNDUP:
+		kgdb_nmicallback(cpu, get_irq_regs());
+		break;
 	default:
-		pr_warn("CPU%d: unhandled IPI%d\n", smp_processor_id(), ipi);
+		pr_warn("CPU%d: unhandled IPI%d\n", cpu, ipi);
 		break;
 	}
 
@@ -209,6 +215,7 @@ static const char * const ipi_names[] = {
 	[IPI_IRQ_WORK]		= "IRQ work interrupts",
 	[IPI_TIMER]		= "Timer broadcast interrupts",
 	[IPI_CPU_BACKTRACE]     = "CPU backtrace interrupts",
+	[IPI_KGDB_ROUNDUP]	= "KGDB roundup interrupts",
 };
 
 void show_ipi_stats(struct seq_file *p, int prec)
@@ -339,3 +346,19 @@ void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu)
 {
 	nmi_trigger_cpumask_backtrace(mask, exclude_cpu, riscv_backtrace_ipi);
 }
+
+#ifdef CONFIG_KGDB
+void kgdb_roundup_cpus(void)
+{
+	int this_cpu = raw_smp_processor_id();
+	int cpu;
+
+	for_each_online_cpu(cpu) {
+		/* No need to roundup ourselves */
+		if (cpu == this_cpu)
+			continue;
+
+		send_ipi_single(cpu, IPI_KGDB_ROUNDUP);
+	}
+}
+#endif