patch-2.4.23 linux-2.4.23/arch/i386/kernel/io_apic.c

• Lines: 57
• Date: 2003-11-28 10:26:19.000000000 -0800
• Orig file: linux-2.4.22/arch/i386/kernel/io_apic.c
• Orig date: 2003-08-25 04:44:39.000000000 -0700

diff -urN linux-2.4.22/arch/i386/kernel/io_apic.c linux-2.4.23/arch/i386/kernel/io_apic.c
@@ -169,6 +169,14 @@
 {
 	struct IO_APIC_route_entry entry;
 	unsigned long flags;
+	
+	/* Check delivery_mode to be sure we're not clearing an SMI pin */
+	spin_lock_irqsave(&ioapic_lock, flags);
+	*(((int*)&entry) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
+	*(((int*)&entry) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
+	spin_unlock_irqrestore(&ioapic_lock, flags);
+	if (entry.delivery_mode == dest_SMI)
+		return;
 
 	/*
 	 * Disable it in the IO-APIC irq-routing table:
@@ -1080,10 +1088,6 @@
 	unsigned char old_id;
 	unsigned long flags;
 
-	if (acpi_ioapic)
-		/* This gets done during IOAPIC enumeration for ACPI. */
-		return;
-
 	if (clustered_apic_mode)
 		/* We don't have a good way to do this yet - hack */
 		phys_id_present_map = (u_long) 0xf;
@@ -1365,6 +1369,13 @@
 static void set_ioapic_affinity (unsigned int irq, unsigned long mask)
 {
 	unsigned long flags;
+
+	/* pick a single cpu for clustered xapics */
+	if(clustered_apic_mode == CLUSTERED_APIC_XAPIC){
+		int cpu = ffs(mask)-1;
+		mask = cpu_to_physical_apicid(cpu);
+	}
+
 	/*
 	 * Only the first 8 bits are valid.
 	 */
@@ -1705,12 +1716,14 @@
 	/*
 	 * Set up IO-APIC IRQ routing.
 	 */
-	setup_ioapic_ids_from_mpc();
+	if (!acpi_ioapic)
+		setup_ioapic_ids_from_mpc();
 	sync_Arb_IDs();
 	setup_IO_APIC_irqs();
 	init_IO_APIC_traps();
 	check_timer();
-	print_IO_APIC();
+	if (!acpi_ioapic)
+		print_IO_APIC();
 }