From fb4002d54b25ab70d46649a76bf536c67cb92bf4 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Fri, 16 May 2025 20:07:43 -0400 Subject: kernel: Add cpu_halt_others() and harden panic() Ensure interrupts are disabled at the start of panic() to prevent any interrupts from further degrading the state of the system. Also adds a newline before "panic: " to clean up the logs. Signed-off-by: Ian Moffett --- sys/arch/amd64/amd64/machdep.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'sys/arch/amd64') diff --git a/sys/arch/amd64/amd64/machdep.c b/sys/arch/amd64/amd64/machdep.c index 07d6cdd..4a885fa 100644 --- a/sys/arch/amd64/amd64/machdep.c +++ b/sys/arch/amd64/amd64/machdep.c @@ -174,6 +174,21 @@ cpu_halt_all(void) for (;;); } +/* + * Same as cpu_halt_all() but for all other + * cores but ourselves. + */ +void +cpu_halt_others(void) +{ + if (rdmsr(IA32_GS_BASE) == 0) { + __ASMV("cli; hlt"); + } + + /* Send IPI to all cores */ + lapic_send_ipi(0, IPI_SHORTHAND_OTHERS, halt_vector); +} + void serial_init(void) { -- cgit v1.2.3