apic: no delivery status flag in ICR for X2APIC

In X2APIC mode there is no delivery status flag in ICR, hence there is no need to read ICR at all. Signed-off-by: Pawel Wieczorkiewicz <[email protected]>
KernelTestFramework · Nov 24, 2020 · 4a4dea6 · 4a4dea6
1 parent 000838f
commit 4a4dea6
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/include/arch/x86/apic.h b/include/arch/x86/apic.h
@@ -484,8 +484,12 @@ static inline void *apic_get_base(apic_base_t apic_base) {
 }
 
 static inline void apic_wait_ready(void) {
+    apic_mode_t mode = apic_get_mode();
     apic_icr_t icr;
 
+    if (mode == APIC_MODE_X2APIC)
+        return;
+
     do {
         icr = apic_icr_read();
         if (icr.deliv_status == APIC_DELIV_STATUS_IDLE)