From a0e0b16a5e5e0370d2312d17a250784d03b9507e Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Wed, 19 Nov 2025 17:47:43 -0500
Subject: kern/amd64: mp: Add CPU idle function to split logic

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/arch/amd64/cpu/mp.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'sys')

diff --git a/sys/arch/amd64/cpu/mp.c b/sys/arch/amd64/cpu/mp.c
index a84648b..7ce3a06 100644
--- a/sys/arch/amd64/cpu/mp.c
+++ b/sys/arch/amd64/cpu/mp.c
@@ -110,6 +110,14 @@ static uint32_t ap_count = 0;
 static volatile uint32_t aps_up = 0;
 __section(".trampoline") static char ap_code[4096];
 
+static void
+cpu_idle(void)
+{
+    for (;;) {
+        __asmv("hlt");
+    }
+}
+
 static void
 cpu_mtrr_save(void)
 {
@@ -283,9 +291,8 @@ cpu_lm_entry(void)
     atomic_inc_int(&aps_up);
     cpu_list[aps_up] = ci;
 
-    for (;;) {
-        __asmv("cli; hlt");
-    }
+    cpu_idle();
+    __builtin_unreachable();
 }
 
 static int
-- 
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