Commit f658bcfb authored by Hans Rosenfeld's avatar Hans Rosenfeld Committed by Borislav Petkov

x86, cacheinfo: Cleanup L3 cache index disable support

Adaptions to the changes of the AMD northbridge caching code: instead
of a bool in each l3 struct, use a flag in amd_northbridges.flags to
indicate L3 cache index disable support; use a pointer to the whole
northbridge instead of the misc device in the l3 struct; simplify the
initialisation; dynamically generate sysfs attribute array.
Signed-off-by: default avatarHans Rosenfeld <hans.rosenfeld@amd.com>
Signed-off-by: default avatarBorislav Petkov <borislav.petkov@amd.com>
parent 9653a5c7
...@@ -25,6 +25,7 @@ struct amd_northbridge_info { ...@@ -25,6 +25,7 @@ struct amd_northbridge_info {
extern struct amd_northbridge_info amd_northbridges; extern struct amd_northbridge_info amd_northbridges;
#define AMD_NB_GART 0x1 #define AMD_NB_GART 0x1
#define AMD_NB_L3_INDEX_DISABLE 0x2
#ifdef CONFIG_AMD_NB #ifdef CONFIG_AMD_NB
......
...@@ -68,6 +68,16 @@ int amd_cache_northbridges(void) ...@@ -68,6 +68,16 @@ int amd_cache_northbridges(void)
boot_cpu_data.x86 == 0x15) boot_cpu_data.x86 == 0x15)
amd_northbridges.flags |= AMD_NB_GART; amd_northbridges.flags |= AMD_NB_GART;
/*
* Some CPU families support L3 Cache Index Disable. There are some
* limitations because of E382 and E388 on family 0x10.
*/
if (boot_cpu_data.x86 == 0x10 &&
boot_cpu_data.x86_model >= 0x8 &&
(boot_cpu_data.x86_model > 0x9 ||
boot_cpu_data.x86_mask >= 0x1))
amd_northbridges.flags |= AMD_NB_L3_INDEX_DISABLE;
return 0; return 0;
} }
EXPORT_SYMBOL_GPL(amd_cache_northbridges); EXPORT_SYMBOL_GPL(amd_cache_northbridges);
......
...@@ -149,8 +149,7 @@ union _cpuid4_leaf_ecx { ...@@ -149,8 +149,7 @@ union _cpuid4_leaf_ecx {
}; };
struct amd_l3_cache { struct amd_l3_cache {
struct pci_dev *dev; struct amd_northbridge *nb;
bool can_disable;
unsigned indices; unsigned indices;
u8 subcaches[4]; u8 subcaches[4];
}; };
...@@ -311,14 +310,12 @@ struct _cache_attr { ...@@ -311,14 +310,12 @@ struct _cache_attr {
/* /*
* L3 cache descriptors * L3 cache descriptors
*/ */
static struct amd_l3_cache **__cpuinitdata l3_caches;
static void __cpuinit amd_calc_l3_indices(struct amd_l3_cache *l3) static void __cpuinit amd_calc_l3_indices(struct amd_l3_cache *l3)
{ {
unsigned int sc0, sc1, sc2, sc3; unsigned int sc0, sc1, sc2, sc3;
u32 val = 0; u32 val = 0;
pci_read_config_dword(l3->dev, 0x1C4, &val); pci_read_config_dword(l3->nb->misc, 0x1C4, &val);
/* calculate subcache sizes */ /* calculate subcache sizes */
l3->subcaches[0] = sc0 = !(val & BIT(0)); l3->subcaches[0] = sc0 = !(val & BIT(0));
...@@ -330,47 +327,14 @@ static void __cpuinit amd_calc_l3_indices(struct amd_l3_cache *l3) ...@@ -330,47 +327,14 @@ static void __cpuinit amd_calc_l3_indices(struct amd_l3_cache *l3)
l3->indices = (max(max3(sc0, sc1, sc2), sc3) << 10) - 1; l3->indices = (max(max3(sc0, sc1, sc2), sc3) << 10) - 1;
} }
static struct amd_l3_cache * __cpuinit amd_init_l3_cache(int node) static void __cpuinit amd_init_l3_cache(struct _cpuid4_info_regs *this_leaf,
{
struct amd_l3_cache *l3;
struct pci_dev *dev = node_to_amd_nb(node)->misc;
l3 = kzalloc(sizeof(struct amd_l3_cache), GFP_ATOMIC);
if (!l3) {
printk(KERN_WARNING "Error allocating L3 struct\n");
return NULL;
}
l3->dev = dev;
amd_calc_l3_indices(l3);
return l3;
}
static void __cpuinit amd_check_l3_disable(struct _cpuid4_info_regs *this_leaf,
int index) int index)
{ {
static struct amd_l3_cache *__cpuinitdata l3_caches;
int node; int node;
if (boot_cpu_data.x86 != 0x10) /* only for L3, and not in virtualized environments */
return; if (index < 3 || amd_nb_num() == 0)
if (index < 3)
return;
/* see errata #382 and #388 */
if (boot_cpu_data.x86_model < 0x8)
return;
if ((boot_cpu_data.x86_model == 0x8 ||
boot_cpu_data.x86_model == 0x9)
&&
boot_cpu_data.x86_mask < 0x1)
return;
/* not in virtualized environments */
if (amd_nb_num() == 0)
return; return;
/* /*
...@@ -378,7 +342,7 @@ static void __cpuinit amd_check_l3_disable(struct _cpuid4_info_regs *this_leaf, ...@@ -378,7 +342,7 @@ static void __cpuinit amd_check_l3_disable(struct _cpuid4_info_regs *this_leaf,
* never freed but this is done only on shutdown so it doesn't matter. * never freed but this is done only on shutdown so it doesn't matter.
*/ */
if (!l3_caches) { if (!l3_caches) {
int size = amd_nb_num() * sizeof(struct amd_l3_cache *); int size = amd_nb_num() * sizeof(struct amd_l3_cache);
l3_caches = kzalloc(size, GFP_ATOMIC); l3_caches = kzalloc(size, GFP_ATOMIC);
if (!l3_caches) if (!l3_caches)
...@@ -387,14 +351,12 @@ static void __cpuinit amd_check_l3_disable(struct _cpuid4_info_regs *this_leaf, ...@@ -387,14 +351,12 @@ static void __cpuinit amd_check_l3_disable(struct _cpuid4_info_regs *this_leaf,
node = amd_get_nb_id(smp_processor_id()); node = amd_get_nb_id(smp_processor_id());
if (!l3_caches[node]) { if (!l3_caches[node].nb) {
l3_caches[node] = amd_init_l3_cache(node); l3_caches[node].nb = node_to_amd_nb(node);
l3_caches[node]->can_disable = true; amd_calc_l3_indices(&l3_caches[node]);
} }
WARN_ON(!l3_caches[node]); this_leaf->l3 = &l3_caches[node];
this_leaf->l3 = l3_caches[node];
} }
/* /*
...@@ -408,7 +370,7 @@ int amd_get_l3_disable_slot(struct amd_l3_cache *l3, unsigned slot) ...@@ -408,7 +370,7 @@ int amd_get_l3_disable_slot(struct amd_l3_cache *l3, unsigned slot)
{ {
unsigned int reg = 0; unsigned int reg = 0;
pci_read_config_dword(l3->dev, 0x1BC + slot * 4, &reg); pci_read_config_dword(l3->nb->misc, 0x1BC + slot * 4, &reg);
/* check whether this slot is activated already */ /* check whether this slot is activated already */
if (reg & (3UL << 30)) if (reg & (3UL << 30))
...@@ -422,7 +384,8 @@ static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf, ...@@ -422,7 +384,8 @@ static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf,
{ {
int index; int index;
if (!this_leaf->l3 || !this_leaf->l3->can_disable) if (!this_leaf->l3 ||
!amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
return -EINVAL; return -EINVAL;
index = amd_get_l3_disable_slot(this_leaf->l3, slot); index = amd_get_l3_disable_slot(this_leaf->l3, slot);
...@@ -457,7 +420,7 @@ static void amd_l3_disable_index(struct amd_l3_cache *l3, int cpu, ...@@ -457,7 +420,7 @@ static void amd_l3_disable_index(struct amd_l3_cache *l3, int cpu,
if (!l3->subcaches[i]) if (!l3->subcaches[i])
continue; continue;
pci_write_config_dword(l3->dev, 0x1BC + slot * 4, reg); pci_write_config_dword(l3->nb->misc, 0x1BC + slot * 4, reg);
/* /*
* We need to WBINVD on a core on the node containing the L3 * We need to WBINVD on a core on the node containing the L3
...@@ -467,7 +430,7 @@ static void amd_l3_disable_index(struct amd_l3_cache *l3, int cpu, ...@@ -467,7 +430,7 @@ static void amd_l3_disable_index(struct amd_l3_cache *l3, int cpu,
wbinvd_on_cpu(cpu); wbinvd_on_cpu(cpu);
reg |= BIT(31); reg |= BIT(31);
pci_write_config_dword(l3->dev, 0x1BC + slot * 4, reg); pci_write_config_dword(l3->nb->misc, 0x1BC + slot * 4, reg);
} }
} }
...@@ -524,7 +487,8 @@ static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf, ...@@ -524,7 +487,8 @@ static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf,
if (!capable(CAP_SYS_ADMIN)) if (!capable(CAP_SYS_ADMIN))
return -EPERM; return -EPERM;
if (!this_leaf->l3 || !this_leaf->l3->can_disable) if (!this_leaf->l3 ||
!amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
return -EINVAL; return -EINVAL;
cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map)); cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
...@@ -558,10 +522,7 @@ static struct _cache_attr cache_disable_1 = __ATTR(cache_disable_1, 0644, ...@@ -558,10 +522,7 @@ static struct _cache_attr cache_disable_1 = __ATTR(cache_disable_1, 0644,
show_cache_disable_1, store_cache_disable_1); show_cache_disable_1, store_cache_disable_1);
#else /* CONFIG_AMD_NB */ #else /* CONFIG_AMD_NB */
static void __cpuinit #define amd_init_l3_cache(x, y)
amd_check_l3_disable(struct _cpuid4_info_regs *this_leaf, int index)
{
};
#endif /* CONFIG_AMD_NB */ #endif /* CONFIG_AMD_NB */
static int static int
...@@ -575,7 +536,7 @@ __cpuinit cpuid4_cache_lookup_regs(int index, ...@@ -575,7 +536,7 @@ __cpuinit cpuid4_cache_lookup_regs(int index,
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) { if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
amd_cpuid4(index, &eax, &ebx, &ecx); amd_cpuid4(index, &eax, &ebx, &ecx);
amd_check_l3_disable(this_leaf, index); amd_init_l3_cache(this_leaf, index);
} else { } else {
cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx); cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx);
} }
...@@ -983,30 +944,48 @@ define_one_ro(size); ...@@ -983,30 +944,48 @@ define_one_ro(size);
define_one_ro(shared_cpu_map); define_one_ro(shared_cpu_map);
define_one_ro(shared_cpu_list); define_one_ro(shared_cpu_list);
#define DEFAULT_SYSFS_CACHE_ATTRS \
&type.attr, \
&level.attr, \
&coherency_line_size.attr, \
&physical_line_partition.attr, \
&ways_of_associativity.attr, \
&number_of_sets.attr, \
&size.attr, \
&shared_cpu_map.attr, \
&shared_cpu_list.attr
static struct attribute *default_attrs[] = { static struct attribute *default_attrs[] = {
DEFAULT_SYSFS_CACHE_ATTRS, &type.attr,
&level.attr,
&coherency_line_size.attr,
&physical_line_partition.attr,
&ways_of_associativity.attr,
&number_of_sets.attr,
&size.attr,
&shared_cpu_map.attr,
&shared_cpu_list.attr,
NULL NULL
}; };
static struct attribute *default_l3_attrs[] = {
DEFAULT_SYSFS_CACHE_ATTRS,
#ifdef CONFIG_AMD_NB #ifdef CONFIG_AMD_NB
&cache_disable_0.attr, static struct attribute ** __cpuinit amd_l3_attrs(void)
&cache_disable_1.attr, {
static struct attribute **attrs;
int n;
if (attrs)
return attrs;
n = sizeof (default_attrs) / sizeof (struct attribute *);
if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
n += 2;
attrs = kzalloc(n * sizeof (struct attribute *), GFP_KERNEL);
if (attrs == NULL)
return attrs = default_attrs;
for (n = 0; default_attrs[n]; n++)
attrs[n] = default_attrs[n];
if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE)) {
attrs[n++] = &cache_disable_0.attr;
attrs[n++] = &cache_disable_1.attr;
}
return attrs;
}
#endif #endif
NULL
};
static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf) static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
{ {
...@@ -1117,11 +1096,11 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev) ...@@ -1117,11 +1096,11 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
this_leaf = CPUID4_INFO_IDX(cpu, i); this_leaf = CPUID4_INFO_IDX(cpu, i);
if (this_leaf->l3 && this_leaf->l3->can_disable)
ktype_cache.default_attrs = default_l3_attrs;
else
ktype_cache.default_attrs = default_attrs; ktype_cache.default_attrs = default_attrs;
#ifdef CONFIG_AMD_NB
if (this_leaf->l3)
ktype_cache.default_attrs = amd_l3_attrs();
#endif
retval = kobject_init_and_add(&(this_object->kobj), retval = kobject_init_and_add(&(this_object->kobj),
&ktype_cache, &ktype_cache,
per_cpu(ici_cache_kobject, cpu), per_cpu(ici_cache_kobject, cpu),
......
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