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x86: cacheinfo: use cached K8 NB_MISC devices instead of scanning for it 

Impact: avoid code duplication

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
LKML-Reference: <20090409131617.GI31527@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Andreas Herrmann 2009-04-09 15:16:17 +02:00 committed by Ingo Molnar
parent 845d8c761e
commit afd9fceec5
2 changed files with 11 additions and 34 deletions
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8
arch/x86/include/asm/k8.h
View File

@ -12,4 +12,12 @@ extern int cache_k8_northbridges(void);
extern void k8_flush_garts(void);
extern int k8_scan_nodes(unsigned long start, unsigned long end);
#ifdef CONFIG_K8_NB
#define node_to_k8_nb_misc(node) \
(node < num_k8_northbridges) ? k8_northbridges[node] : NULL
#else
#define node_to_k8_nb_misc(node) NULL
#endif
#endif /* _ASM_X86_K8_H */

37
arch/x86/kernel/cpu/intel_cacheinfo.c
View File

@ -17,6 +17,7 @@
#include <asm/processor.h>
#include <asm/smp.h>
#include <asm/k8.h>
#define LVL_1_INST 1
#define LVL_1_DATA 2
@ -159,14 +160,6 @@ struct _cpuid4_info_regs {
unsigned long can_disable;
};
#if defined(CONFIG_PCI) && defined(CONFIG_SYSFS)
static struct pci_device_id k8_nb_id[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1103) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1203) },
{}
};
#endif
unsigned short num_cache_leaves;
/* AMD doesn't have CPUID4. Emulate it here to report the same
@ -704,30 +697,6 @@ static ssize_t show_type(struct _cpuid4_info *this_leaf, char *buf)
#define to_object(k) container_of(k, struct _index_kobject, kobj)
#define to_attr(a) container_of(a, struct _cache_attr, attr)
#ifdef CONFIG_PCI
static struct pci_dev *get_k8_northbridge(int node)
{
struct pci_dev *dev = NULL;
int i;
for (i = 0; i <= node; i++) {
do {
dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
if (!dev)
break;
} while (!pci_match_id(&k8_nb_id[0], dev));
if (!dev)
break;
}
return dev;
}
#else
static struct pci_dev *get_k8_northbridge(int node)
{
return NULL;
}
#endif
static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf)
{
const struct cpumask *mask = to_cpumask(this_leaf->shared_cpu_map);
@ -739,7 +708,7 @@ static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf)
if (!this_leaf->can_disable)
return sprintf(buf, "Feature not enabled\n");
dev = get_k8_northbridge(node);
dev = node_to_k8_nb_misc(node);
if (!dev) {
printk(KERN_ERR "Attempting AMD northbridge operation on a system with no northbridge\n");
return -EINVAL;
@ -783,7 +752,7 @@ store_cache_disable(struct _cpuid4_info *this_leaf, const char *buf,
return -EINVAL;
val |= 0xc0000000;
dev = get_k8_northbridge(node);
dev = node_to_k8_nb_misc(node);
if (!dev) {
printk(KERN_ERR "Attempting AMD northbridge operation on a system with no northbridge\n");
return -EINVAL;