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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] x86: Sync cpu/intel_cacheinfo.c with Linux kernel
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1200920963 0
# Node ID f1947dddb5a05d7b03ec9c8d8d09fe4fd500c485
# Parent 60ee6f97cb19d24214f69627740b3a6719d056e4
x86: Sync cpu/intel_cacheinfo.c with Linux kernel
Signed-off-by: Xiaowei Yang <xiaowei.yang@xxxxxxxxx>
---
xen/arch/x86/cpu/intel_cacheinfo.c | 347 ++++++++++++++++++++++++++++++++++---
1 files changed, 321 insertions(+), 26 deletions(-)
diff -r 60ee6f97cb19 -r f1947dddb5a0 xen/arch/x86/cpu/intel_cacheinfo.c
--- a/xen/arch/x86/cpu/intel_cacheinfo.c Mon Jan 21 13:08:44 2008 +0000
+++ b/xen/arch/x86/cpu/intel_cacheinfo.c Mon Jan 21 13:09:23 2008 +0000
@@ -1,6 +1,16 @@
+/*
+ * Routines to indentify caches on Intel CPU.
+ *
+ * Changes:
+ * Venkatesh Pallipadi : Adding cache identification through cpuid(4)
+ * Ashok Raj <ashok.raj@xxxxxxxxx>: Work with CPU hotplug
infrastructure.
+ * Andi Kleen / Andreas Herrmann : CPUID4 emulation on AMD.
+ */
+
#include <xen/config.h>
#include <xen/init.h>
#include <xen/lib.h>
+#include <xen/errno.h>
#include <asm/processor.h>
#define LVL_1_INST 1
@@ -17,7 +27,7 @@ struct _cache_table
};
/* all the cache descriptor types we care about (no TLB or trace cache
entries) */
-static struct _cache_table cache_table[] __devinitdata =
+static struct _cache_table cache_table[] __cpuinitdata =
{
{ 0x06, LVL_1_INST, 8 }, /* 4-way set assoc, 32 byte line size */
{ 0x08, LVL_1_INST, 16 }, /* 4-way set assoc, 32 byte line size */
@@ -30,13 +40,23 @@ static struct _cache_table cache_table[]
{ 0x2c, LVL_1_DATA, 32 }, /* 8-way set assoc, 64 byte line size */
{ 0x30, LVL_1_INST, 32 }, /* 8-way set assoc, 64 byte line size */
{ 0x39, LVL_2, 128 }, /* 4-way set assoc, sectored cache, 64
byte line size */
+ { 0x3a, LVL_2, 192 }, /* 6-way set assoc, sectored cache, 64
byte line size */
{ 0x3b, LVL_2, 128 }, /* 2-way set assoc, sectored cache, 64
byte line size */
{ 0x3c, LVL_2, 256 }, /* 4-way set assoc, sectored cache, 64
byte line size */
+ { 0x3d, LVL_2, 384 }, /* 6-way set assoc, sectored cache, 64
byte line size */
+ { 0x3e, LVL_2, 512 }, /* 4-way set assoc, sectored cache, 64
byte line size */
{ 0x41, LVL_2, 128 }, /* 4-way set assoc, 32 byte line size */
{ 0x42, LVL_2, 256 }, /* 4-way set assoc, 32 byte line size */
{ 0x43, LVL_2, 512 }, /* 4-way set assoc, 32 byte line size */
{ 0x44, LVL_2, 1024 }, /* 4-way set assoc, 32 byte line size */
{ 0x45, LVL_2, 2048 }, /* 4-way set assoc, 32 byte line size */
+ { 0x46, LVL_3, 4096 }, /* 4-way set assoc, 64 byte line size */
+ { 0x47, LVL_3, 8192 }, /* 8-way set assoc, 64 byte line size */
+ { 0x49, LVL_3, 4096 }, /* 16-way set assoc, 64 byte line size
*/
+ { 0x4a, LVL_3, 6144 }, /* 12-way set assoc, 64 byte line size
*/
+ { 0x4b, LVL_3, 8192 }, /* 16-way set assoc, 64 byte line size
*/
+ { 0x4c, LVL_3, 12288 }, /* 12-way set assoc, 64 byte line size
*/
+ { 0x4d, LVL_3, 16384 }, /* 16-way set assoc, 64 byte line size
*/
{ 0x60, LVL_1_DATA, 16 }, /* 8-way set assoc, sectored cache, 64
byte line size */
{ 0x66, LVL_1_DATA, 8 }, /* 4-way set assoc, sectored cache, 64
byte line size */
{ 0x67, LVL_1_DATA, 16 }, /* 4-way set assoc, sectored cache, 64
byte line size */
@@ -44,6 +64,7 @@ static struct _cache_table cache_table[]
{ 0x70, LVL_TRACE, 12 }, /* 8-way set assoc */
{ 0x71, LVL_TRACE, 16 }, /* 8-way set assoc */
{ 0x72, LVL_TRACE, 32 }, /* 8-way set assoc */
+ { 0x73, LVL_TRACE, 64 }, /* 8-way set assoc */
{ 0x78, LVL_2, 1024 }, /* 4-way set assoc, 64 byte line size */
{ 0x79, LVL_2, 128 }, /* 8-way set assoc, sectored cache, 64
byte line size */
{ 0x7a, LVL_2, 256 }, /* 8-way set assoc, sectored cache, 64
byte line size */
@@ -60,15 +81,276 @@ static struct _cache_table cache_table[]
{ 0x00, 0, 0}
};
-unsigned int __devinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
+
+enum _cache_type
+{
+ CACHE_TYPE_NULL = 0,
+ CACHE_TYPE_DATA = 1,
+ CACHE_TYPE_INST = 2,
+ CACHE_TYPE_UNIFIED = 3
+};
+
+union _cpuid4_leaf_eax {
+ struct {
+ enum _cache_type type:5;
+ unsigned int level:3;
+ unsigned int is_self_initializing:1;
+ unsigned int is_fully_associative:1;
+ unsigned int reserved:4;
+ unsigned int num_threads_sharing:12;
+ unsigned int num_cores_on_die:6;
+ } split;
+ u32 full;
+};
+
+union _cpuid4_leaf_ebx {
+ struct {
+ unsigned int coherency_line_size:12;
+ unsigned int physical_line_partition:10;
+ unsigned int ways_of_associativity:10;
+ } split;
+ u32 full;
+};
+
+union _cpuid4_leaf_ecx {
+ struct {
+ unsigned int number_of_sets:32;
+ } split;
+ u32 full;
+};
+
+struct _cpuid4_info {
+ union _cpuid4_leaf_eax eax;
+ union _cpuid4_leaf_ebx ebx;
+ union _cpuid4_leaf_ecx ecx;
+ unsigned long size;
+ cpumask_t shared_cpu_map;
+};
+
+unsigned short num_cache_leaves;
+
+/* AMD doesn't have CPUID4. Emulate it here to report the same
+ information to the user. This makes some assumptions about the machine:
+ L2 not shared, no SMT etc. that is currently true on AMD CPUs.
+
+ In theory the TLBs could be reported as fake type (they are in "dummy").
+ Maybe later */
+union l1_cache {
+ struct {
+ unsigned line_size : 8;
+ unsigned lines_per_tag : 8;
+ unsigned assoc : 8;
+ unsigned size_in_kb : 8;
+ };
+ unsigned val;
+};
+
+union l2_cache {
+ struct {
+ unsigned line_size : 8;
+ unsigned lines_per_tag : 4;
+ unsigned assoc : 4;
+ unsigned size_in_kb : 16;
+ };
+ unsigned val;
+};
+
+union l3_cache {
+ struct {
+ unsigned line_size : 8;
+ unsigned lines_per_tag : 4;
+ unsigned assoc : 4;
+ unsigned res : 2;
+ unsigned size_encoded : 14;
+ };
+ unsigned val;
+};
+
+static const unsigned short assocs[] = {
+ [1] = 1, [2] = 2, [4] = 4, [6] = 8,
+ [8] = 16, [0xa] = 32, [0xb] = 48,
+ [0xc] = 64,
+ [0xf] = 0xffff // ??
+};
+
+static const unsigned char levels[] = { 1, 1, 2, 3 };
+static const unsigned char types[] = { 1, 2, 3, 3 };
+
+static void __cpuinit amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
+ union _cpuid4_leaf_ebx *ebx,
+ union _cpuid4_leaf_ecx *ecx)
+{
+ unsigned dummy;
+ unsigned line_size, lines_per_tag, assoc, size_in_kb;
+ union l1_cache l1i, l1d;
+ union l2_cache l2;
+ union l3_cache l3;
+ union l1_cache *l1 = &l1d;
+
+ eax->full = 0;
+ ebx->full = 0;
+ ecx->full = 0;
+
+ cpuid(0x80000005, &dummy, &dummy, &l1d.val, &l1i.val);
+ cpuid(0x80000006, &dummy, &dummy, &l2.val, &l3.val);
+
+ switch (leaf) {
+ case 1:
+ l1 = &l1i;
+ case 0:
+ if (!l1->val)
+ return;
+ assoc = l1->assoc;
+ line_size = l1->line_size;
+ lines_per_tag = l1->lines_per_tag;
+ size_in_kb = l1->size_in_kb;
+ break;
+ case 2:
+ if (!l2.val)
+ return;
+ assoc = l2.assoc;
+ line_size = l2.line_size;
+ lines_per_tag = l2.lines_per_tag;
+ /* cpu_data has errata corrections for K7 applied */
+ size_in_kb = current_cpu_data.x86_cache_size;
+ break;
+ case 3:
+ if (!l3.val)
+ return;
+ assoc = l3.assoc;
+ line_size = l3.line_size;
+ lines_per_tag = l3.lines_per_tag;
+ size_in_kb = l3.size_encoded * 512;
+ break;
+ default:
+ return;
+ }
+
+ eax->split.is_self_initializing = 1;
+ eax->split.type = types[leaf];
+ eax->split.level = levels[leaf];
+ if (leaf == 3)
+ eax->split.num_threads_sharing = current_cpu_data.x86_max_cores
- 1;
+ else
+ eax->split.num_threads_sharing = 0;
+ eax->split.num_cores_on_die = current_cpu_data.x86_max_cores - 1;
+
+
+ if (assoc == 0xf)
+ eax->split.is_fully_associative = 1;
+ ebx->split.coherency_line_size = line_size - 1;
+ ebx->split.ways_of_associativity = assocs[assoc] - 1;
+ ebx->split.physical_line_partition = lines_per_tag - 1;
+ ecx->split.number_of_sets = (size_in_kb * 1024) / line_size /
+ (ebx->split.ways_of_associativity + 1) - 1;
+}
+
+static int __cpuinit cpuid4_cache_lookup(int index, struct _cpuid4_info
*this_leaf)
+{
+ union _cpuid4_leaf_eax eax;
+ union _cpuid4_leaf_ebx ebx;
+ union _cpuid4_leaf_ecx ecx;
+ unsigned edx;
+
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
+ amd_cpuid4(index, &eax, &ebx, &ecx);
+ else
+ cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx);
+ if (eax.split.type == CACHE_TYPE_NULL)
+ return -EIO; /* better error ? */
+
+ this_leaf->eax = eax;
+ this_leaf->ebx = ebx;
+ this_leaf->ecx = ecx;
+ this_leaf->size = (ecx.split.number_of_sets + 1) *
+ (ebx.split.coherency_line_size + 1) *
+ (ebx.split.physical_line_partition + 1) *
+ (ebx.split.ways_of_associativity + 1);
+ return 0;
+}
+
+static int __cpuinit find_num_cache_leaves(void)
+{
+ unsigned int eax, ebx, ecx, edx;
+ union _cpuid4_leaf_eax cache_eax;
+ int i = -1;
+
+ do {
+ ++i;
+ /* Do cpuid(4) loop to find out num_cache_leaves */
+ cpuid_count(4, i, &eax, &ebx, &ecx, &edx);
+ cache_eax.full = eax;
+ } while (cache_eax.split.type != CACHE_TYPE_NULL);
+ return i;
+}
+
+unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
{
unsigned int trace = 0, l1i = 0, l1d = 0, l2 = 0, l3 = 0; /* Cache
sizes */
-
- if (c->cpuid_level > 1) {
+ unsigned int new_l1d = 0, new_l1i = 0; /* Cache sizes from cpuid(4) */
+ unsigned int new_l2 = 0, new_l3 = 0, i; /* Cache sizes from cpuid(4) */
+ unsigned int l2_id = 0, l3_id = 0, num_threads_sharing, index_msb;
+
+ if (c->cpuid_level > 3) {
+ static int is_initialized;
+
+ if (is_initialized == 0) {
+ /* Init num_cache_leaves from boot CPU */
+ num_cache_leaves = find_num_cache_leaves();
+ is_initialized++;
+ }
+
+ /*
+ * Whenever possible use cpuid(4), deterministic cache
+ * parameters cpuid leaf to find the cache details
+ */
+ for (i = 0; i < num_cache_leaves; i++) {
+ struct _cpuid4_info this_leaf;
+
+ int retval;
+
+ retval = cpuid4_cache_lookup(i, &this_leaf);
+ if (retval >= 0) {
+ switch(this_leaf.eax.split.level) {
+ case 1:
+ if (this_leaf.eax.split.type ==
+ CACHE_TYPE_DATA)
+ new_l1d = this_leaf.size/1024;
+ else if (this_leaf.eax.split.type ==
+ CACHE_TYPE_INST)
+ new_l1i = this_leaf.size/1024;
+ break;
+ case 2:
+ new_l2 = this_leaf.size/1024;
+ num_threads_sharing = 1 +
this_leaf.eax.split.num_threads_sharing;
+ index_msb =
get_count_order(num_threads_sharing);
+ l2_id = c->apicid >> index_msb;
+ break;
+ case 3:
+ new_l3 = this_leaf.size/1024;
+ num_threads_sharing = 1 +
this_leaf.eax.split.num_threads_sharing;
+ index_msb =
get_count_order(num_threads_sharing);
+ l3_id = c->apicid >> index_msb;
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ }
+ /*
+ * Don't use cpuid2 if cpuid4 is supported. For P4, we use cpuid2 for
+ * trace cache
+ */
+ if ((num_cache_leaves == 0 || c->x86 == 15) && c->cpuid_level > 1) {
/* supports eax=2 call */
int i, j, n;
int regs[4];
unsigned char *dp = (unsigned char *)regs;
+ int only_trace = 0;
+
+ if (num_cache_leaves != 0 && c->x86 == 15)
+ only_trace = 1;
/* Number of times to iterate */
n = cpuid_eax(2) & 0xFF;
@@ -90,6 +372,8 @@ unsigned int __devinit init_intel_cachei
while (cache_table[k].descriptor != 0)
{
if (cache_table[k].descriptor == des) {
+ if (only_trace &&
cache_table[k].cache_type != LVL_TRACE)
+ break;
switch
(cache_table[k].cache_type) {
case LVL_1_INST:
l1i +=
cache_table[k].size;
@@ -115,28 +399,39 @@ unsigned int __devinit init_intel_cachei
}
}
}
-
- if ( trace )
- printk (KERN_INFO "CPU: Trace cache: %dK uops", trace);
- else if ( l1i )
- printk (KERN_INFO "CPU: L1 I cache: %dK", l1i);
- if ( l1d )
- printk(", L1 D cache: %dK\n", l1d);
- else
- printk("\n");
- if ( l2 )
- printk(KERN_INFO "CPU: L2 cache: %dK\n", l2);
- if ( l3 )
- printk(KERN_INFO "CPU: L3 cache: %dK\n", l3);
-
- /*
- * This assumes the L3 cache is shared; it typically lives in
- * the northbridge. The L1 caches are included by the L2
- * cache, and so should not be included for the purpose of
- * SMP switching weights.
- */
- c->x86_cache_size = l2 ? l2 : (l1i+l1d);
- }
+ }
+
+ if (new_l1d)
+ l1d = new_l1d;
+
+ if (new_l1i)
+ l1i = new_l1i;
+
+ if (new_l2) {
+ l2 = new_l2;
+ }
+
+ if (new_l3) {
+ l3 = new_l3;
+ }
+
+ if (trace)
+ printk (KERN_INFO "CPU: Trace cache: %dK uops", trace);
+ else if ( l1i )
+ printk (KERN_INFO "CPU: L1 I cache: %dK", l1i);
+
+ if (l1d)
+ printk(", L1 D cache: %dK\n", l1d);
+ else
+ printk("\n");
+
+ if (l2)
+ printk(KERN_INFO "CPU: L2 cache: %dK\n", l2);
+
+ if (l3)
+ printk(KERN_INFO "CPU: L3 cache: %dK\n", l3);
+
+ c->x86_cache_size = l3 ? l3 : (l2 ? l2 : (l1i+l1d));
return l2;
}
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