From 5e99093e9fed913b058ee11f1882cecb1aace990 Mon Sep 17 00:00:00 2001
From: "Chloe M." <chloe@mensia.org>
Date: Sat, 27 Jun 2026 19:47:19 +0000
Subject: [PATCH] stos/amd64: cpu: Ignore non online capable processors

Signed-off-by: Chloe M. <chloe@mensia.org>
---
 paw/stos/arch/amd64/cpu/mp.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/paw/stos/arch/amd64/cpu/mp.c b/paw/stos/arch/amd64/cpu/mp.c
index 7394830..d4e7141 100644
--- a/paw/stos/arch/amd64/cpu/mp.c
+++ b/paw/stos/arch/amd64/cpu/mp.c
@@ -19,6 +19,9 @@
 #define MP_LOG_CAP 4
 #define MP_DEBUG 1
 
+/* Local APIC flags */
+#define LAPIC_ONLINE_CAPABLE BIT(1)
+
 #define DTRACE(Fmt, ...) \
     TRACE("[ MP ]: " Fmt, ##__VA_ARGS__)
 
@@ -54,6 +57,14 @@ ApKick(ACPI_LOCAL_APIC *Lapic)
         return;
     }
 
+    /*
+     * Some processor entries may not be "online capable", if we
+     * encounter such entries, ignore it.
+     */
+    if (!ISSET(Lapic->Flags, LAPIC_ONLINE_CAPABLE)) {
+        return;
+    }
+
     /* Send an INIT IPI to the processor */
     MdLapicSendIpi(
         0,