diff options
| author |   Joachim Deguara <joachim.deguara@amd.com> | 2007-07-21 17:11:44 +0200 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-21 18:37:14 -0700 |
| commit | 7557244ba27f63404236cb27277b98c27d856692 (patch) | |
| tree | 98fa8bbf1ac63315657e35465defba84fc843ed9 /arch/x86_64 | |
| parent | x86_64: remove __smp_alt* sections (diff) | |
| download | linux-dev-7557244ba27f63404236cb27277b98c27d856692.tar.xz linux-dev-7557244ba27f63404236cb27277b98c27d856692.zip | |
x86_64: make k8topology multi-core aware
This makes k8topology multicore aware instead of limited to signle- and
dual-core CPUs. It uses the CPUID to be more future proof.
Signed-off-by: Joachim Deguara <joachim.deguara@amd.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64')
| -rw-r--r-- | arch/x86_64/mm/k8topology.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/x86_64/mm/k8topology.c b/arch/x86_64/mm/k8topology.c index f983c75825d0..a96006f7ae0c 100644 --- a/arch/x86_64/mm/k8topology.c +++ b/arch/x86_64/mm/k8topology.c @@ -44,12 +44,12 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end) { unsigned long prevbase; struct bootnode nodes[8]; - int nodeid, i, nb; + int nodeid, i, j, nb; unsigned char nodeids[8]; int found = 0; u32 reg; unsigned numnodes; - unsigned dualcore = 0; + unsigned num_cores; if (!early_pci_allowed()) return -1; @@ -60,6 +60,9 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end) printk(KERN_INFO "Scanning NUMA topology in Northbridge %d\n", nb); + num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1; + printk(KERN_INFO "CPU has %d num_cores\n", num_cores); + reg = read_pci_config(0, nb, 0, 0x60); numnodes = ((reg >> 4) & 0xF) + 1; if (numnodes <= 1) @@ -73,8 +76,6 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end) unsigned long base,limit; u32 nodeid; - /* Undefined before E stepping, but hopefully 0 */ - dualcore |= ((read_pci_config(0, nb, 3, 0xe8) >> 12) & 3) == 1; base = read_pci_config(0, nb, 1, 0x40 + i*8); limit = read_pci_config(0, nb, 1, 0x44 + i*8); @@ -170,8 +171,8 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end) for (i = 0; i < 8; i++) { if (nodes[i].start != nodes[i].end) { nodeid = nodeids[i]; - apicid_to_node[nodeid << dualcore] = i; - apicid_to_node[(nodeid << dualcore) + dualcore] = i; + for (j = 0; j < num_cores; j++) + apicid_to_node[(nodeid * num_cores) + j] = i; setup_node_bootmem(i, nodes[i].start, nodes[i].end); } } |