[PATCH] Summit: APIC limits

This one sets up the apic broadcast id (the maximum allowable apic address)
properly for whichever platform. It also abstracts out check_apicid_used,
because that check doesn't work on Summit. Oh, and I bumped up
MAX_IO_APICS, but only for NUMA x86 platforms.

arch/i386/kernel/io_apic.c

@@ -1152,7 +1152,7 @@ static void __init setup_ioapic_ids_from_mpc (void)
 		
 		old_id = mp_ioapics[apic].mpc_apicid;
 
-		if (mp_ioapics[apic].mpc_apicid >= 0xf) {
+		if (mp_ioapics[apic].mpc_apicid >= APIC_BROADCAST_ID) {
 			printk(KERN_ERR "BIOS bug, IO-APIC#%d ID is %d in the MPC table!...\n",
 				apic, mp_ioapics[apic].mpc_apicid);
 			printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
@@ -1165,7 +1165,8 @@ static void __init setup_ioapic_ids_from_mpc (void)
 		 * system must have a unique ID or we get lots of nice
 		 * 'stuck on smp_invalidate_needed IPI wait' messages.
 		 */
-		if (phys_id_present_map & (1 << mp_ioapics[apic].mpc_apicid)) {
+		if (check_apicid_used(phys_id_present_map,
+					mp_ioapics[apic].mpc_apicid)) {
 			printk(KERN_ERR "BIOS bug, IO-APIC#%d ID %d is already used!...\n",
 				apic, mp_ioapics[apic].mpc_apicid);
 			for (i = 0; i < 0xf; i++)

arch/i386/mach-generic/mach_apic.h

@@ -17,4 +17,7 @@ static inline unsigned long calculate_ldr(unsigned long old)
  #define TARGET_CPUS 0x01
 #endif
 
+#define APIC_BROADCAST_ID      0x0F
+#define check_apicid_used(bitmap, apicid) (bitmap & (1 << apicid))
+
 #endif /* __ASM_MACH_APIC_H */

arch/i386/mach-summit/mach_apic.h

@@ -23,4 +23,7 @@ static inline unsigned long calculate_ldr(unsigned long old)
 #define APIC_DFR_VALUE	(x86_summit ? APIC_DFR_CLUSTER : APIC_DFR_FLAT)
 #define TARGET_CPUS	(x86_summit ? XAPIC_DEST_CPUS_MASK : cpu_online_map)
 
+#define APIC_BROADCAST_ID     (x86_summit ? 0xFF : 0x0F)
+#define check_apicid_used(bitmap, apicid) (0)
+
 #endif /* __ASM_MACH_APIC_H */

include/asm-i386/apicdef.h

@@ -110,7 +110,11 @@
 
 #define APIC_BASE (fix_to_virt(FIX_APIC_BASE))
 
-#define MAX_IO_APICS 8
+#ifdef CONFIG_X86_NUMA
+ #define MAX_IO_APICS 32
+#else
+ #define MAX_IO_APICS 8
+#endif
 
 /*
  * the local APIC register structure, memory mapped. Not terribly well