diff options
Diffstat (limited to 'arch/i386/kernel/cpu/intel_cacheinfo.c')
| -rw-r--r-- | arch/i386/kernel/cpu/intel_cacheinfo.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/arch/i386/kernel/cpu/intel_cacheinfo.c b/arch/i386/kernel/cpu/intel_cacheinfo.c index 1d768b263269..9e0d5f83cb9f 100644 --- a/arch/i386/kernel/cpu/intel_cacheinfo.c +++ b/arch/i386/kernel/cpu/intel_cacheinfo.c @@ -128,7 +128,7 @@ static int __devinit cpuid4_cache_lookup(int index, struct _cpuid4_info *this_le cpuid_count(4, index, &eax, &ebx, &ecx, &edx); cache_eax.full = eax; if (cache_eax.split.type == CACHE_TYPE_NULL) - return -1; + return -EIO; /* better error ? */ this_leaf->eax.full = eax; this_leaf->ebx.full = ebx; @@ -305,6 +305,9 @@ static void __devinit cache_shared_cpu_map_setup(unsigned int cpu, int index) { struct _cpuid4_info *this_leaf; unsigned long num_threads_sharing; +#ifdef CONFIG_X86_HT + struct cpuinfo_x86 *c = cpu_data + cpu; +#endif this_leaf = CPUID4_INFO_IDX(cpu, index); num_threads_sharing = 1 + this_leaf->eax.split.num_threads_sharing; @@ -314,10 +317,12 @@ static void __devinit cache_shared_cpu_map_setup(unsigned int cpu, int index) #ifdef CONFIG_X86_HT else if (num_threads_sharing == smp_num_siblings) this_leaf->shared_cpu_map = cpu_sibling_map[cpu]; -#endif + else if (num_threads_sharing == (c->x86_num_cores * smp_num_siblings)) + this_leaf->shared_cpu_map = cpu_core_map[cpu]; else - printk(KERN_INFO "Number of CPUs sharing cache didn't match " + printk(KERN_DEBUG "Number of CPUs sharing cache didn't match " "any known set of CPUs\n"); +#endif } #else static void __init cache_shared_cpu_map_setup(unsigned int cpu, int index) {} @@ -334,6 +339,7 @@ static int __devinit detect_cache_attributes(unsigned int cpu) struct _cpuid4_info *this_leaf; unsigned long j; int retval; + cpumask_t oldmask; if (num_cache_leaves == 0) return -ENOENT; @@ -345,19 +351,26 @@ static int __devinit detect_cache_attributes(unsigned int cpu) memset(cpuid4_info[cpu], 0, sizeof(struct _cpuid4_info) * num_cache_leaves); + oldmask = current->cpus_allowed; + retval = set_cpus_allowed(current, cpumask_of_cpu(cpu)); + if (retval) + goto out; + /* Do cpuid and store the results */ + retval = 0; for (j = 0; j < num_cache_leaves; j++) { this_leaf = CPUID4_INFO_IDX(cpu, j); retval = cpuid4_cache_lookup(j, this_leaf); if (unlikely(retval < 0)) - goto err_out; + break; cache_shared_cpu_map_setup(cpu, j); } - return 0; + set_cpus_allowed(current, oldmask); -err_out: - free_cache_attributes(cpu); - return -ENOMEM; +out: + if (retval) + free_cache_attributes(cpu); + return retval; } #ifdef CONFIG_SYSFS |