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Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 

* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, cacheinfo: Enable L3 CID only on AMD
  x86, cacheinfo: Remove NUMA dependency, fix for AMD Fam10h rev D1
  x86, cpu: Print AMD virtualization features in /proc/cpuinfo
  x86, cacheinfo: Calculate L3 indices
  x86, cacheinfo: Add cache index disable sysfs attrs only to L3 caches
  x86, cacheinfo: Fix disabling of L3 cache indices
  intel-agp: Switch to wbinvd_on_all_cpus
  x86, lib: Add wbinvd smp helpers
This commit is contained in:
Linus Torvalds 2010-02-28 10:37:06 -08:00
parent 43a834d86c cb19060abf
commit 58f02db466
7 changed files with 197 additions and 106 deletions
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4
arch/x86/include/asm/cpufeature.h
View File

@ -168,6 +168,10 @@
#define X86_FEATURE_FLEXPRIORITY (8*32+ 2) /* Intel FlexPriority */
#define X86_FEATURE_EPT (8*32+ 3) /* Intel Extended Page Table */
#define X86_FEATURE_VPID (8*32+ 4) /* Intel Virtual Processor ID */
#define X86_FEATURE_NPT (8*32+5) /* AMD Nested Page Table support */
#define X86_FEATURE_LBRV (8*32+6) /* AMD LBR Virtualization support */
#define X86_FEATURE_SVML (8*32+7) /* "svm_lock" AMD SVM locking MSR */
#define X86_FEATURE_NRIPS (8*32+8) /* "nrip_save" AMD SVM next_rip save */
#if defined(__KERNEL__) && !defined(__ASSEMBLY__)

9
arch/x86/include/asm/smp.h
View File

@ -135,6 +135,8 @@ int native_cpu_disable(void);
void native_cpu_die(unsigned int cpu);
void native_play_dead(void);
void play_dead_common(void);
void wbinvd_on_cpu(int cpu);
int wbinvd_on_all_cpus(void);
void native_send_call_func_ipi(const struct cpumask *mask);
void native_send_call_func_single_ipi(int cpu);
@ -147,6 +149,13 @@ static inline int num_booting_cpus(void)
{
return cpumask_weight(cpu_callout_mask);
}
#else /* !CONFIG_SMP */
#define wbinvd_on_cpu(cpu) wbinvd()
static inline int wbinvd_on_all_cpus(void)
{
wbinvd();
return 0;
}
#endif /* CONFIG_SMP */
extern unsigned disabled_cpus __cpuinitdata;

4
arch/x86/kernel/cpu/addon_cpuid_features.c
View File

@ -32,6 +32,10 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c)
static const struct cpuid_bit __cpuinitconst cpuid_bits[] = {
{ X86_FEATURE_IDA, CR_EAX, 1, 0x00000006 },
{ X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006 },
{ X86_FEATURE_NPT, CR_EDX, 0, 0x8000000a },
{ X86_FEATURE_LBRV, CR_EDX, 1, 0x8000000a },
{ X86_FEATURE_SVML, CR_EDX, 2, 0x8000000a },
{ X86_FEATURE_NRIPS, CR_EDX, 3, 0x8000000a },
{ 0, 0, 0, 0 }
};

250
arch/x86/kernel/cpu/intel_cacheinfo.c
View File

@ -18,6 +18,7 @@
#include <asm/processor.h>
#include <linux/smp.h>
#include <asm/k8.h>
#include <asm/smp.h>
#define LVL_1_INST 1
#define LVL_1_DATA 2
@ -152,7 +153,8 @@ struct _cpuid4_info {
union _cpuid4_leaf_ebx ebx;
union _cpuid4_leaf_ecx ecx;
unsigned long size;
unsigned long can_disable;
bool can_disable;
unsigned int l3_indices;
DECLARE_BITMAP(shared_cpu_map, NR_CPUS);
};
@ -162,7 +164,8 @@ struct _cpuid4_info_regs {
union _cpuid4_leaf_ebx ebx;
union _cpuid4_leaf_ecx ecx;
unsigned long size;
unsigned long can_disable;
bool can_disable;
unsigned int l3_indices;
};
unsigned short num_cache_leaves;
@ -292,6 +295,36 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
(ebx->split.ways_of_associativity + 1) - 1;
}
struct _cache_attr {
struct attribute attr;
ssize_t (*show)(struct _cpuid4_info *, char *);
ssize_t (*store)(struct _cpuid4_info *, const char *, size_t count);
};
#ifdef CONFIG_CPU_SUP_AMD
static unsigned int __cpuinit amd_calc_l3_indices(void)
{
/*
* We're called over smp_call_function_single() and therefore
* are on the correct cpu.
*/
int cpu = smp_processor_id();
int node = cpu_to_node(cpu);
struct pci_dev *dev = node_to_k8_nb_misc(node);
unsigned int sc0, sc1, sc2, sc3;
u32 val = 0;
pci_read_config_dword(dev, 0x1C4, &val);
/* calculate subcache sizes */
sc0 = !(val & BIT(0));
sc1 = !(val & BIT(4));
sc2 = !(val & BIT(8)) + !(val & BIT(9));
sc3 = !(val & BIT(12)) + !(val & BIT(13));
return (max(max(max(sc0, sc1), sc2), sc3) << 10) - 1;
}
static void __cpuinit
amd_check_l3_disable(int index, struct _cpuid4_info_regs *this_leaf)
{
@ -301,13 +334,104 @@ amd_check_l3_disable(int index, struct _cpuid4_info_regs *this_leaf)
if (boot_cpu_data.x86 == 0x11)
return;
/* see erratum #382 */
if ((boot_cpu_data.x86 == 0x10) && (boot_cpu_data.x86_model < 0x8))
/* see errata #382 and #388 */
if ((boot_cpu_data.x86 == 0x10) &&
((boot_cpu_data.x86_model < 0x8) ||
(boot_cpu_data.x86_mask < 0x1)))
return;
this_leaf->can_disable = 1;
this_leaf->can_disable = true;
this_leaf->l3_indices = amd_calc_l3_indices();
}
static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf,
unsigned int index)
{
int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
int node = amd_get_nb_id(cpu);
struct pci_dev *dev = node_to_k8_nb_misc(node);
unsigned int reg = 0;
if (!this_leaf->can_disable)
return -EINVAL;
if (!dev)
return -EINVAL;
pci_read_config_dword(dev, 0x1BC + index * 4, &reg);
return sprintf(buf, "0x%08x\n", reg);
}
#define SHOW_CACHE_DISABLE(index) \
static ssize_t \
show_cache_disable_##index(struct _cpuid4_info *this_leaf, char *buf) \
{ \
return show_cache_disable(this_leaf, buf, index); \
}
SHOW_CACHE_DISABLE(0)
SHOW_CACHE_DISABLE(1)
static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf,
const char *buf, size_t count, unsigned int index)
{
int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
int node = amd_get_nb_id(cpu);
struct pci_dev *dev = node_to_k8_nb_misc(node);
unsigned long val = 0;
#define SUBCACHE_MASK (3UL << 20)
#define SUBCACHE_INDEX 0xfff
if (!this_leaf->can_disable)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (!dev)
return -EINVAL;
if (strict_strtoul(buf, 10, &val) < 0)
return -EINVAL;
/* do not allow writes outside of allowed bits */
if ((val & ~(SUBCACHE_MASK | SUBCACHE_INDEX)) ||
((val & SUBCACHE_INDEX) > this_leaf->l3_indices))
return -EINVAL;
val |= BIT(30);
pci_write_config_dword(dev, 0x1BC + index * 4, val);
/*
* We need to WBINVD on a core on the node containing the L3 cache which
* indices we disable therefore a simple wbinvd() is not sufficient.
*/
wbinvd_on_cpu(cpu);
pci_write_config_dword(dev, 0x1BC + index * 4, val | BIT(31));
return count;
}
#define STORE_CACHE_DISABLE(index) \
static ssize_t \
store_cache_disable_##index(struct _cpuid4_info *this_leaf, \
const char *buf, size_t count) \
{ \
return store_cache_disable(this_leaf, buf, count, index); \
}
STORE_CACHE_DISABLE(0)
STORE_CACHE_DISABLE(1)
static struct _cache_attr cache_disable_0 = __ATTR(cache_disable_0, 0644,
show_cache_disable_0, store_cache_disable_0);
static struct _cache_attr cache_disable_1 = __ATTR(cache_disable_1, 0644,
show_cache_disable_1, store_cache_disable_1);
#else /* CONFIG_CPU_SUP_AMD */
static void __cpuinit
amd_check_l3_disable(int index, struct _cpuid4_info_regs *this_leaf)
{
};
#endif /* CONFIG_CPU_SUP_AMD */
static int
__cpuinit cpuid4_cache_lookup_regs(int index,
struct _cpuid4_info_regs *this_leaf)
@ -713,82 +837,6 @@ 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)
static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf,
unsigned int index)
{
int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
int node = cpu_to_node(cpu);
struct pci_dev *dev = node_to_k8_nb_misc(node);
unsigned int reg = 0;
if (!this_leaf->can_disable)
return -EINVAL;
if (!dev)
return -EINVAL;
pci_read_config_dword(dev, 0x1BC + index * 4, &reg);
return sprintf(buf, "%x\n", reg);
}
#define SHOW_CACHE_DISABLE(index) \
static ssize_t \
show_cache_disable_##index(struct _cpuid4_info *this_leaf, char *buf) \
{ \
return show_cache_disable(this_leaf, buf, index); \
}
SHOW_CACHE_DISABLE(0)
SHOW_CACHE_DISABLE(1)
static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf,
const char *buf, size_t count, unsigned int index)
{
int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
int node = cpu_to_node(cpu);
struct pci_dev *dev = node_to_k8_nb_misc(node);
unsigned long val = 0;
unsigned int scrubber = 0;
if (!this_leaf->can_disable)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (!dev)
return -EINVAL;
if (strict_strtoul(buf, 10, &val) < 0)
return -EINVAL;
val |= 0xc0000000;
pci_read_config_dword(dev, 0x58, &scrubber);
scrubber &= ~0x1f000000;
pci_write_config_dword(dev, 0x58, scrubber);
pci_write_config_dword(dev, 0x1BC + index * 4, val & ~0x40000000);
wbinvd();
pci_write_config_dword(dev, 0x1BC + index * 4, val);
return count;
}
#define STORE_CACHE_DISABLE(index) \
static ssize_t \
store_cache_disable_##index(struct _cpuid4_info *this_leaf, \
const char *buf, size_t count) \
{ \
return store_cache_disable(this_leaf, buf, count, index); \
}
STORE_CACHE_DISABLE(0)
STORE_CACHE_DISABLE(1)
struct _cache_attr {
struct attribute attr;
ssize_t (*show)(struct _cpuid4_info *, char *);
ssize_t (*store)(struct _cpuid4_info *, const char *, size_t count);
};
#define define_one_ro(_name) \
static struct _cache_attr _name = \
__ATTR(_name, 0444, show_##_name, NULL)
@ -803,23 +851,28 @@ define_one_ro(size);
define_one_ro(shared_cpu_map);
define_one_ro(shared_cpu_list);
static struct _cache_attr cache_disable_0 = __ATTR(cache_disable_0, 0644,
show_cache_disable_0, store_cache_disable_0);
static struct _cache_attr cache_disable_1 = __ATTR(cache_disable_1, 0644,
show_cache_disable_1, store_cache_disable_1);
#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[] = {
&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,
DEFAULT_SYSFS_CACHE_ATTRS,
NULL
};
static struct attribute *default_l3_attrs[] = {
DEFAULT_SYSFS_CACHE_ATTRS,
#ifdef CONFIG_CPU_SUP_AMD
&cache_disable_0.attr,
&cache_disable_1.attr,
#endif
NULL
};
@ -910,6 +963,7 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
unsigned int cpu = sys_dev->id;
unsigned long i, j;
struct _index_kobject *this_object;
struct _cpuid4_info *this_leaf;
int retval;
retval = cpuid4_cache_sysfs_init(cpu);
@ -928,6 +982,14 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
this_object = INDEX_KOBJECT_PTR(cpu, i);
this_object->cpu = cpu;
this_object->index = i;
this_leaf = CPUID4_INFO_IDX(cpu, i);
if (this_leaf->can_disable)
ktype_cache.default_attrs = default_l3_attrs;
else
ktype_cache.default_attrs = default_attrs;
retval = kobject_init_and_add(&(this_object->kobj),
&ktype_cache,
per_cpu(ici_cache_kobject, cpu),

2
arch/x86/lib/Makefile
View File

@ -14,7 +14,7 @@ $(obj)/inat.o: $(obj)/inat-tables.c
clean-files := inat-tables.c
obj-$(CONFIG_SMP) += msr-smp.o
obj-$(CONFIG_SMP) += msr-smp.o cache-smp.o
lib-y := delay.o
lib-y += thunk_$(BITS).o

19
arch/x86/lib/cache-smp.c Normal file
View File

@ -0,0 +1,19 @@
#include <linux/smp.h>
#include <linux/module.h>
static void __wbinvd(void *dummy)
{
wbinvd();
}
void wbinvd_on_cpu(int cpu)
{
smp_call_function_single(cpu, __wbinvd, NULL, 1);
}
EXPORT_SYMBOL(wbinvd_on_cpu);
int wbinvd_on_all_cpus(void)
{
return on_each_cpu(__wbinvd, NULL, 1);
}
EXPORT_SYMBOL(wbinvd_on_all_cpus);

15
drivers/char/agp/intel-agp.c
View File

@ -8,6 +8,7 @@
#include <linux/kernel.h>
#include <linux/pagemap.h>
#include <linux/agp_backend.h>
#include <asm/smp.h>
#include "agp.h"
/*
@ -815,12 +816,6 @@ static void intel_i830_setup_flush(void)
intel_i830_fini_flush();
}
static void
do_wbinvd(void *null)
{
wbinvd();
}
/* The chipset_flush interface needs to get data that has already been
* flushed out of the CPU all the way out to main memory, because the GPU
* doesn't snoop those buffers.
@ -837,12 +832,10 @@ static void intel_i830_chipset_flush(struct agp_bridge_data *bridge)
memset(pg, 0, 1024);
if (cpu_has_clflush) {
if (cpu_has_clflush)
clflush_cache_range(pg, 1024);
} else {
if (on_each_cpu(do_wbinvd, NULL, 1) != 0)
printk(KERN_ERR "Timed out waiting for cache flush.\n");
}
else if (wbinvd_on_all_cpus() != 0)
printk(KERN_ERR "Timed out waiting for cache flush.\n");
}
/* The intel i830 automatically initializes the agp aperture during POST.