From cf1bb5e566ad0e346af810b399d871a74031feb2 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Fri, 25 Jul 2025 02:44:11 -0400
Subject: kernel/amd64: Keep track of which cores are online

Give each core a bit that indicates whether the core is online or
halted. We also provide a cpu_halt() which marks the core as offline.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/arch/amd64/amd64/machdep.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'sys/arch')

diff --git a/sys/arch/amd64/amd64/machdep.c b/sys/arch/amd64/amd64/machdep.c
index efd1af8..19dcf44 100644
--- a/sys/arch/amd64/amd64/machdep.c
+++ b/sys/arch/amd64/amd64/machdep.c
@@ -418,6 +418,7 @@ cpu_startup(struct cpu_info *ci)
     setup_vectors(ci);
 
     try_mitigate_spectre();
+    ci->online = 1;
 
     cpu_get_info(ci);
     cpu_enable_smep();
-- 
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