Author: mhorne Date: Fri May 1 21:59:47 2020 New Revision: 360554 URL: https://svnweb.freebsd.org/changeset/base/360554
Log: Use the HSM SBI extension to halt CPUs Differential Revision: https://reviews.freebsd.org/D24498 Modified: head/sys/riscv/riscv/machdep.c Modified: head/sys/riscv/riscv/machdep.c ============================================================================== --- head/sys/riscv/riscv/machdep.c Fri May 1 21:58:19 2020 (r360553) +++ head/sys/riscv/riscv/machdep.c Fri May 1 21:59:47 2020 (r360554) @@ -473,9 +473,16 @@ void 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 */ } /* _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
