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Commit 69e1a33f authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds
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[PATCH] x86-64: Use ACPI PXM to parse PCI<->node assignments 



Since this is shared code I had to implement it for i386 too

Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 413588c7

arch/i386/kernel/srat.c

+7 −1
Original line number Diff line number Diff line
@@ -213,12 +213,18 @@ static __init void node_read_chunk(int nid, struct node_memory_chunk_s *memory_c 
		node_end_pfn[nid] = memory_chunk->end_pfn;

}



static u8 pxm_to_nid_map[MAX_PXM_DOMAINS];/* _PXM to logical node ID map */



int pxm_to_node(int pxm)

{

	return pxm_to_nid_map[pxm];

}



/* Parse the ACPI Static Resource Affinity Table */

static int __init acpi20_parse_srat(struct acpi_table_srat *sratp)

{

	u8 *start, *end, *p;

	int i, j, nid;

	u8 pxm_to_nid_map[MAX_PXM_DOMAINS];/* _PXM to logical node ID map */

	u8 nid_to_pxm_map[MAX_NUMNODES];/* logical node ID to _PXM map */



	start = (u8 *)(&(sratp->reserved) + 1);	/* skip header */

arch/i386/pci/acpi.c

+16 −1
Original line number Diff line number Diff line
@@ -3,16 +3,31 @@ 
#include <linux/init.h>

#include <linux/irq.h>

#include <asm/hw_irq.h>

#include <asm/numa.h>

#include "pci.h"



struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)

{

	struct pci_bus *bus;



	if (domain != 0) {

		printk(KERN_WARNING "PCI: Multiple domains not supported\n");

		return NULL;

	}



	return pcibios_scan_root(busnum);

	bus = pcibios_scan_root(busnum);

#ifdef CONFIG_ACPI_NUMA

	if (bus != NULL) {

		int pxm = acpi_get_pxm(device->handle);

		if (pxm >= 0) {

			bus->sysdata = (void *)(unsigned long)pxm_to_node(pxm);

			printk("bus %d -> pxm %d -> node %ld\n",

				busnum, pxm, (long)(bus->sysdata));

		}

	}

#endif

	

	return bus;

}



extern int pci_routeirq;

arch/x86_64/kernel/mpparse.c

+0 −2
Original line number Diff line number Diff line
@@ -46,8 +46,6 @@ int acpi_found_madt; 
int apic_version [MAX_APICS];

unsigned char mp_bus_id_to_type [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };

int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };

unsigned char pci_bus_to_node [256];

EXPORT_SYMBOL(pci_bus_to_node);



static int mp_current_pci_id = 0;

/* I/O APIC entries */

arch/x86_64/mm/srat.c

+7 −0
Original line number Diff line number Diff line
@@ -25,6 +25,13 @@ static nodemask_t nodes_found __initdata; 
static struct node nodes[MAX_NUMNODES] __initdata;

static __u8  pxm2node[256] = { [0 ... 255] = 0xff };



int pxm_to_node(int pxm)

{

	if ((unsigned)pxm >= 256)

		return 0;

	return pxm2node[pxm];

}



static __init int setup_node(int pxm)

{

	unsigned node = pxm2node[pxm];

arch/x86_64/pci/k8-bus.c

+8 −2
Original line number Diff line number Diff line
@@ -58,10 +58,16 @@ fill_mp_bus_to_cpumask(void) 
				for (j = SECONDARY_LDT_BUS_NUMBER(ldtbus);

				     j <= SUBORDINATE_LDT_BUS_NUMBER(ldtbus);

				     j++) { 

					int node = NODE_ID(nid);

					struct pci_bus *bus;

					long node = NODE_ID(nid);

					/* Algorithm a bit dumb, but

 					   it shouldn't matter here */

					bus = pci_find_bus(0, j);

					if (!bus)

						continue;

					if (!node_online(node))

						node = 0;

					pci_bus_to_node[j] = node;

					bus->sysdata = (void *)node;

				}		

			}

		}