From 8f7f2ad0d9a41dd81a1091346e88a0cb47433452 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Fri, 26 Sep 2025 23:52:31 -0400 Subject: kern/amd64: cpu: Add cpu_halt_others() function Add function to halt all processor cores on the machine excluding self. This may be used for emergency conditions on the system. Signed-off-by: Ian Moffett --- src/sys/arch/amd64/cpu/cpu_halt.c | 47 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 src/sys/arch/amd64/cpu/cpu_halt.c (limited to 'src/sys/arch/amd64/cpu/cpu_halt.c') diff --git a/src/sys/arch/amd64/cpu/cpu_halt.c b/src/sys/arch/amd64/cpu/cpu_halt.c new file mode 100644 index 0000000..f556b31 --- /dev/null +++ b/src/sys/arch/amd64/cpu/cpu_halt.c @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2025 Ian Marco Moffett and L5 engineers + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include +#include +#include + +void +cpu_halt_others(void) +{ + struct lapic_ipi ipi = { + .shorthand = IPI_SHAND_AXS, + .delmod = IPI_DELMOD_FIXED, + .vector = HALT_VECTOR, + .apic_id = 0, + .dest_mode = IPI_DESTMODE_PHYSICAL + }; + + lapic_tx_ipi(&ipi); +} -- cgit v1.2.3