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| author | Andi Kleen <ak@suse.de> | 2005-05-20 14:27:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-20 15:48:20 -0700 |
| commit | b41e29398a873945d02e0009ce7e57608fdb4042 (patch) | |
| tree | dc2e4cfd8cb20ce788bc341e9d734adbcebedd27 /arch/i386/kernel/cpu/amd.c | |
| parent | b39c4fab259b216148e705344a892c96efe1946d (diff) | |
| download | blackbird-op-linux-b41e29398a873945d02e0009ce7e57608fdb4042.tar.gz blackbird-op-linux-b41e29398a873945d02e0009ce7e57608fdb4042.zip | |
[PATCH] x86_64: 386/x86-64 Further AMD dual core fixes
- Remove duplicated ifdef
- Make core_id match what Intel uses
- Initialize phys_proc_id correctly for non DC case
- Handle non power of two core numbers.
Fixes for both i386 and x86-64
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/cpu/amd.c')
| -rw-r--r-- | arch/i386/kernel/cpu/amd.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/i386/kernel/cpu/amd.c b/arch/i386/kernel/cpu/amd.c index fa34a06c0d79..73aeaf5a9d4e 100644 --- a/arch/i386/kernel/cpu/amd.c +++ b/arch/i386/kernel/cpu/amd.c @@ -195,7 +195,7 @@ static void __init init_amd(struct cpuinfo_x86 *c) c->x86_num_cores = 1; } -#ifdef CONFIG_X86_SMP +#ifdef CONFIG_X86_HT /* * On a AMD dual core setup the lower bits of the APIC id * distingush the cores. Assumes number of cores is a power @@ -203,8 +203,11 @@ static void __init init_amd(struct cpuinfo_x86 *c) */ if (c->x86_num_cores > 1) { int cpu = smp_processor_id(); - /* Fix up the APIC ID following AMD specifications. */ - cpu_core_id[cpu] >>= hweight32(c->x86_num_cores - 1); + unsigned bits = 0; + while ((1 << bits) < c->x86_num_cores) + bits++; + cpu_core_id[cpu] = phys_proc_id[cpu] & ((1<<bits)-1); + phys_proc_id[cpu] >>= bits; printk(KERN_INFO "CPU %d(%d) -> Core %d\n", cpu, c->x86_num_cores, cpu_core_id[cpu]); } |
