D24498.id71260.diff
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D24498.id71260.diff
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	Index: head/sys/riscv/riscv/machdep.c
	===================================================================
	--- head/sys/riscv/riscv/machdep.c
	+++ head/sys/riscv/riscv/machdep.c
	@@ -473,9 +473,16 @@
	cpu_halt(void)
	{

	+ /*
	+ * Try to power down using the HSM SBI extension and fall back to a
	+ * simple wfi loop.
	+ */
	intr_disable();
	+ if (sbi_probe_extension(SBI_EXT_ID_HSM) != 0)
	+ sbi_hsm_hart_stop();
	for (;;)
	__asm __volatile("wfi");
	+ /* NOTREACHED */
	}

	/*