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Commit ab530e1f authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
Browse files

x86: early check if a system is numaq 



so we could fall back to one node numa.

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent f19dc2f2

arch/x86/kernel/mpparse.c

+11 −3
Original line number Diff line number Diff line
@@ -70,7 +70,10 @@ static void __cpuinit MP_processor_info(struct mpc_config_processor *m) 
		return;

	}

#ifdef CONFIG_X86_NUMAQ

	if (found_numaq)

		apicid = mpc_apic_id(m, translation_table[mpc_record]);

	else

		apicid = m->mpc_apicid;

#else

	apicid = m->mpc_apicid;

#endif
@@ -91,6 +94,7 @@ static void __init MP_bus_info(struct mpc_config_bus *m) 
	str[6] = 0;



#ifdef CONFIG_X86_NUMAQ

	if (found_numaq)

		mpc_oem_bus_info(m, str, translation_table[mpc_record]);

#else

	printk(KERN_INFO "Bus #%d is %s\n", m->mpc_busid, str);
@@ -112,6 +116,7 @@ static void __init MP_bus_info(struct mpc_config_bus *m) 
#endif

	} else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {

#ifdef CONFIG_X86_NUMAQ

		if (found_numaq)

			mpc_oem_pci_bus(m, translation_table[mpc_record]);

#endif

		clear_bit(m->mpc_busid, mp_bus_not_pci);
@@ -321,6 +326,9 @@ static inline void mps_oem_check(struct mp_config_table *mpc, char *oem, 
{

	if (strncmp(oem, "IBM NUMA", 8))

		printk("Warning!  May not be a NUMA-Q system!\n");

	else

		found_numaq = 1;



	if (mpc->mpc_oemptr)

		smp_read_mpc_oem((struct mp_config_oemtable *)mpc->mpc_oemptr,

				 mpc->mpc_oemsize);

arch/x86/kernel/numaq_32.c

+19 −5
Original line number Diff line number Diff line
@@ -31,9 +31,12 @@ 
#include <asm/numaq.h>

#include <asm/topology.h>

#include <asm/processor.h>

#include <asm/mpspec.h>



#define	MB_TO_PAGES(addr) ((addr) << (20 - PAGE_SHIFT))



int found_numaq;



/*

 * Function: smp_dump_qct()

 *
@@ -67,13 +70,24 @@ static void __init smp_dump_qct(void) 
	}

}



static __init void early_check_numaq(void)

{

	/*

	 * Find possible boot-time SMP configuration:

	 */

	early_find_smp_config();

	/*

 * Unlike Summit, we don't really care to let the NUMA-Q

 * fall back to flat mode.  Don't compile for NUMA-Q

 * unless you really need it!

	 * get boot-time SMP configuration:

	 */

	if (smp_found_config)

		early_get_smp_config();

}



int __init get_memcfg_numaq(void)

{

	early_check_numaq();

	if (!found_numaq)

		return 0;

	smp_dump_qct();

	return 1;

}

include/asm-x86/mpspec.h

+2 −2
Original line number Diff line number Diff line
@@ -21,11 +21,11 @@ extern int pic_mode; 
/* Each PCI slot may be a combo card with its own bus.  4 IRQ pins per slot. */

#define MAX_IRQ_SOURCES (MAX_MP_BUSSES * 4)



#endif



extern void early_find_smp_config(void);

extern void early_get_smp_config(void);



#endif



#if defined(CONFIG_MCA) || defined(CONFIG_EISA)

extern int mp_bus_id_to_type[MAX_MP_BUSSES];

#endif

include/asm-x86/numaq.h

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 


#ifdef CONFIG_X86_NUMAQ



extern int found_numaq;

extern int get_memcfg_numaq(void);



/*