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[PATCH] x86_64: When running cpuid4 need to run on the correct CPU 

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
hifive-unleashed-5.1
Andi Kleen 2005-07-28 21:15:46 -07:00 committed by Linus Torvalds
parent b6a68a16dc
commit e2cac78935
1 changed files with 14 additions and 6 deletions
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20
arch/i386/kernel/cpu/intel_cacheinfo.c
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@ -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;
@ -334,6 +334,7 @@ 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 +346,26 @@ 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