9 files changed, 129 insertions, 80 deletions

diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index b66c13c0cc0f..f36677241ecd 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -39,17 +39,14 @@
 
 #ifdef  CONFIG_X86_64
 
-static inline void acpi_madt_oem_check(char *oem_id, char *oem_table_id)
-{
-}
 extern void __init clustered_apic_check(void);
-static inline int ioapic_setup_disabled(void)
-{
-        return 0;
-}
 
+extern int gsi_irq_sharing(int gsi);
 #include <asm/proto.h>
 
+static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
+
+
 #else                           /* X86 */
 
 #ifdef  CONFIG_X86_LOCAL_APIC
@@ -57,6 +54,8 @@ static inline int ioapic_setup_disabled(void)
 #include <mach_mpparse.h>
 #endif                          /* CONFIG_X86_LOCAL_APIC */
 
+static inline int gsi_irq_sharing(int gsi) { return gsi; }
+
 #endif                          /* X86 */
 
 #define BAD_MADT_ENTRY(entry, end) (                                        \
@@ -459,7 +458,7 @@ int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
                 *irq = IO_APIC_VECTOR(gsi);
         else
 #endif
-                *irq = gsi;
+                *irq = gsi_irq_sharing(gsi);
         return 0;
 }
 
@@ -543,7 +542,7 @@ acpi_scan_rsdp(unsigned long start, unsigned long length)
          * RSDP signature.
          */
         for (offset = 0; offset < length; offset += 16) {
-                if (strncmp((char *)(start + offset), "RSD PTR ", sig_len))
+                if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
                         continue;
                 return (start + offset);
         }
diff --git a/arch/i386/kernel/cpu/amd.c b/arch/i386/kernel/cpu/amd.c
index 53a1681cd964..e344ef88cfcd 100644
--- a/arch/i386/kernel/cpu/amd.c
+++ b/arch/i386/kernel/cpu/amd.c
@@ -206,9 +206,9 @@ static void __init init_amd(struct cpuinfo_x86 *c)
         display_cacheinfo(c);
 
         if (cpuid_eax(0x80000000) >= 0x80000008) {
-                c->x86_num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
-                if (c->x86_num_cores & (c->x86_num_cores - 1))
-                        c->x86_num_cores = 1;
+                c->x86_max_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
+                if (c->x86_max_cores & (c->x86_max_cores - 1))
+                        c->x86_max_cores = 1;
         }
 
 #ifdef CONFIG_X86_HT
@@ -217,15 +217,15 @@ static void __init init_amd(struct cpuinfo_x86 *c)
          * distingush the cores.  Assumes number of cores is a power
          * of two.
          */
-        if (c->x86_num_cores > 1) {
+        if (c->x86_max_cores > 1) {
                 int cpu = smp_processor_id();
                 unsigned bits = 0;
-                while ((1 << bits) < c->x86_num_cores)
+                while ((1 << bits) < c->x86_max_cores)
                         bits++;
                 cpu_core_id[cpu] = phys_proc_id[cpu] & ((1<<bits)-1);
                 phys_proc_id[cpu] >>= bits;
                 printk(KERN_INFO "CPU %d(%d) -> Core %d\n",
-                       cpu, c->x86_num_cores, cpu_core_id[cpu]);
+                       cpu, c->x86_max_cores, cpu_core_id[cpu]);
         }
 #endif
 }
diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index c145fb30002e..31e344b26bae 100644
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -231,10 +231,10 @@ static void __init early_cpu_detect(void)
                 cpuid(0x00000001, &tfms, &misc, &junk, &cap0);
                 c->x86 = (tfms >> 8) & 15;
                 c->x86_model = (tfms >> 4) & 15;
-                if (c->x86 == 0xf) {
+                if (c->x86 == 0xf)
                         c->x86 += (tfms >> 20) & 0xff;
+                if (c->x86 >= 0x6)
                         c->x86_model += ((tfms >> 16) & 0xF) << 4;
-                }
                 c->x86_mask = tfms & 15;
                 if (cap0 & (1<<19))
                         c->x86_cache_alignment = ((misc >> 8) & 0xff) * 8;
@@ -333,7 +333,7 @@ void __devinit identify_cpu(struct cpuinfo_x86 *c)
         c->x86_model = c->x86_mask = 0; /* So far unknown... */
         c->x86_vendor_id[0] = '\0'; /* Unset */
         c->x86_model_id[0] = '\0';  /* Unset */
-        c->x86_num_cores = 1;
+        c->x86_max_cores = 1;
         memset(&c->x86_capability, 0, sizeof c->x86_capability);
 
         if (!have_cpuid_p()) {
@@ -443,52 +443,44 @@ void __devinit identify_cpu(struct cpuinfo_x86 *c)
 void __devinit detect_ht(struct cpuinfo_x86 *c)
 {
         u32     eax, ebx, ecx, edx;
-        int     index_msb, tmp;
+        int     index_msb, core_bits;
         int     cpu = smp_processor_id();
 
+        cpuid(1, &eax, &ebx, &ecx, &edx);
+
+        c->apicid = phys_pkg_id((ebx >> 24) & 0xFF, 0);
+
         if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
                 return;
 
-        cpuid(1, &eax, &ebx, &ecx, &edx);
         smp_num_siblings = (ebx & 0xff0000) >> 16;
 
         if (smp_num_siblings == 1) {
                 printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
         } else if (smp_num_siblings > 1 ) {
-                index_msb = 31;
 
                 if (smp_num_siblings > NR_CPUS) {
                         printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
                         smp_num_siblings = 1;
                         return;
                 }
-                tmp = smp_num_siblings;
-                while ((tmp & 0x80000000 ) == 0) {
-                        tmp <<=1 ;
-                        index_msb--;
-                }
-                if (smp_num_siblings & (smp_num_siblings - 1))
-                        index_msb++;
+
+                index_msb = get_count_order(smp_num_siblings);
                 phys_proc_id[cpu] = phys_pkg_id((ebx >> 24) & 0xFF, index_msb);
 
                 printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
                        phys_proc_id[cpu]);
 
-                smp_num_siblings = smp_num_siblings / c->x86_num_cores;
+                smp_num_siblings = smp_num_siblings / c->x86_max_cores;
 
-                tmp = smp_num_siblings;
-                index_msb = 31;
-                while ((tmp & 0x80000000) == 0) {
-                        tmp <<=1 ;
-                        index_msb--;
-                }
+                index_msb = get_count_order(smp_num_siblings) ;
 
-                if (smp_num_siblings & (smp_num_siblings - 1))
-                        index_msb++;
+                core_bits = get_count_order(c->x86_max_cores);
 
-                cpu_core_id[cpu] = phys_pkg_id((ebx >> 24) & 0xFF, index_msb);
+                cpu_core_id[cpu] = phys_pkg_id((ebx >> 24) & 0xFF, index_msb) &
+                                               ((1 << core_bits) - 1);
 
-                if (c->x86_num_cores > 1)
+                if (c->x86_max_cores > 1)
                         printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
                                cpu_core_id[cpu]);
         }
diff --git a/arch/i386/kernel/cpu/intel.c b/arch/i386/kernel/cpu/intel.c
index c28d26fb5f24..5e2da704f0fa 100644
--- a/arch/i386/kernel/cpu/intel.c
+++ b/arch/i386/kernel/cpu/intel.c
@@ -158,7 +158,7 @@ static void __devinit init_intel(struct cpuinfo_x86 *c)
         if ( p )
                 strcpy(c->x86_model_id, p);
         
-        c->x86_num_cores = num_cpu_cores(c);
+        c->x86_max_cores = num_cpu_cores(c);
 
         detect_ht(c);
 
diff --git a/arch/i386/kernel/cpu/intel_cacheinfo.c b/arch/i386/kernel/cpu/intel_cacheinfo.c
index 4dc42a189ae5..fbfd374aa336 100644
--- a/arch/i386/kernel/cpu/intel_cacheinfo.c
+++ b/arch/i386/kernel/cpu/intel_cacheinfo.c
@@ -293,29 +293,45 @@ static struct _cpuid4_info *cpuid4_info[NR_CPUS];
 #ifdef CONFIG_SMP
 static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
 {
-        struct _cpuid4_info     *this_leaf;
+        struct _cpuid4_info     *this_leaf, *sibling_leaf;
         unsigned long num_threads_sharing;
-#ifdef CONFIG_X86_HT
-        struct cpuinfo_x86 *c = cpu_data + cpu;
-#endif
+        int index_msb, i;
+        struct cpuinfo_x86 *c = cpu_data;
 
         this_leaf = CPUID4_INFO_IDX(cpu, index);
         num_threads_sharing = 1 + this_leaf->eax.split.num_threads_sharing;
 
         if (num_threads_sharing == 1)
                 cpu_set(cpu, this_leaf->shared_cpu_map);
-#ifdef CONFIG_X86_HT
-        else if (num_threads_sharing == smp_num_siblings)
-                this_leaf->shared_cpu_map = cpu_sibling_map[cpu];
-        else if (num_threads_sharing == (c->x86_num_cores * smp_num_siblings))
-                this_leaf->shared_cpu_map = cpu_core_map[cpu];
-        else
-                printk(KERN_DEBUG "Number of CPUs sharing cache didn't match "
-                                "any known set of CPUs\n");
-#endif
+        else {
+                index_msb = get_count_order(num_threads_sharing);
+
+                for_each_online_cpu(i) {
+                        if (c[i].apicid >> index_msb ==
+                            c[cpu].apicid >> index_msb) {
+                                cpu_set(i, this_leaf->shared_cpu_map);
+                                if (i != cpu && cpuid4_info[i])  {
+                                        sibling_leaf = CPUID4_INFO_IDX(i, index);
+                                        cpu_set(cpu, sibling_leaf->shared_cpu_map);
+                                }
+                        }
+                }
+        }
+}
+static void __devinit cache_remove_shared_cpu_map(unsigned int cpu, int index)
+{
+        struct _cpuid4_info     *this_leaf, *sibling_leaf;
+        int sibling;
+
+        this_leaf = CPUID4_INFO_IDX(cpu, index);
+        for_each_cpu_mask(sibling, this_leaf->shared_cpu_map) {
+                sibling_leaf = CPUID4_INFO_IDX(sibling, index); 
+                cpu_clear(cpu, sibling_leaf->shared_cpu_map);
+        }
 }
 #else
 static void __init cache_shared_cpu_map_setup(unsigned int cpu, int index) {}
+static void __init cache_remove_shared_cpu_map(unsigned int cpu, int index) {}
 #endif
 
 static void free_cache_attributes(unsigned int cpu)
@@ -574,8 +590,10 @@ static void __cpuexit cache_remove_dev(struct sys_device * sys_dev)
         unsigned int cpu = sys_dev->id;
         unsigned long i;
 
-        for (i = 0; i < num_cache_leaves; i++)
+        for (i = 0; i < num_cache_leaves; i++) {
+                cache_remove_shared_cpu_map(cpu, i);
                 kobject_unregister(&(INDEX_KOBJECT_PTR(cpu,i)->kobj));
+        }
         kobject_unregister(cache_kobject[cpu]);
         cpuid4_cache_sysfs_exit(cpu);
         return;
diff --git a/arch/i386/kernel/cpu/mtrr/main.c b/arch/i386/kernel/cpu/mtrr/main.c
index dd4ebd6af7e4..1e9db198c440 100644
--- a/arch/i386/kernel/cpu/mtrr/main.c
+++ b/arch/i386/kernel/cpu/mtrr/main.c
@@ -626,6 +626,14 @@ void __init mtrr_bp_init(void)
                 if (cpuid_eax(0x80000000) >= 0x80000008) {
                         u32 phys_addr;
                         phys_addr = cpuid_eax(0x80000008) & 0xff;
+                        /* CPUID workaround for Intel 0F33/0F34 CPU */
+                        if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
+                            boot_cpu_data.x86 == 0xF &&
+                            boot_cpu_data.x86_model == 0x3 &&
+                            (boot_cpu_data.x86_mask == 0x3 ||
+                             boot_cpu_data.x86_mask == 0x4))
+                                phys_addr = 36;
+
                         size_or_mask = ~((1 << (phys_addr - PAGE_SHIFT)) - 1);
                         size_and_mask = ~size_or_mask & 0xfff00000;
                 } else if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR &&
diff --git a/arch/i386/kernel/cpu/proc.c b/arch/i386/kernel/cpu/proc.c
index 41b871ecf4b3..e7921315ae9d 100644
--- a/arch/i386/kernel/cpu/proc.c
+++ b/arch/i386/kernel/cpu/proc.c
@@ -94,12 +94,11 @@ static int show_cpuinfo(struct seq_file *m, void *v)
         if (c->x86_cache_size >= 0)
                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
 #ifdef CONFIG_X86_HT
-        if (c->x86_num_cores * smp_num_siblings > 1) {
+        if (c->x86_max_cores * smp_num_siblings > 1) {
                 seq_printf(m, "physical id\t: %d\n", phys_proc_id[n]);
-                seq_printf(m, "siblings\t: %d\n",
-                                c->x86_num_cores * smp_num_siblings);
+                seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[n]));
                 seq_printf(m, "core id\t\t: %d\n", cpu_core_id[n]);
-                seq_printf(m, "cpu cores\t: %d\n", c->x86_num_cores);
+                seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
         }
 #endif
         
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index bc5a9d97466b..d16520da4550 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -72,9 +72,11 @@ int phys_proc_id[NR_CPUS] __read_mostly = {[0 ... NR_CPUS-1] = BAD_APICID};
 /* Core ID of each logical CPU */
 int cpu_core_id[NR_CPUS] __read_mostly = {[0 ... NR_CPUS-1] = BAD_APICID};
 
+/* representing HT siblings of each logical CPU */
 cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly;
 EXPORT_SYMBOL(cpu_sibling_map);
 
+/* representing HT and core siblings of each logical CPU */
 cpumask_t cpu_core_map[NR_CPUS] __read_mostly;
 EXPORT_SYMBOL(cpu_core_map);
 
@@ -442,35 +444,60 @@ static void __devinit smp_callin(void)
 
 static int cpucount;
 
+/* representing cpus for which sibling maps can be computed */
+static cpumask_t cpu_sibling_setup_map;
+
 static inline void
 set_cpu_sibling_map(int cpu)
 {
         int i;
+        struct cpuinfo_x86 *c = cpu_data;
+
+        cpu_set(cpu, cpu_sibling_setup_map);
 
         if (smp_num_siblings > 1) {
-                for (i = 0; i < NR_CPUS; i++) {
-                        if (!cpu_isset(i, cpu_callout_map))
-                                continue;
-                        if (cpu_core_id[cpu] == cpu_core_id[i]) {
+                for_each_cpu_mask(i, cpu_sibling_setup_map) {
+                        if (phys_proc_id[cpu] == phys_proc_id[i] &&
+                            cpu_core_id[cpu] == cpu_core_id[i]) {
                                 cpu_set(i, cpu_sibling_map[cpu]);
                                 cpu_set(cpu, cpu_sibling_map[i]);
+                                cpu_set(i, cpu_core_map[cpu]);
+                                cpu_set(cpu, cpu_core_map[i]);
                         }
                 }
         } else {
                 cpu_set(cpu, cpu_sibling_map[cpu]);
         }
 
-        if (current_cpu_data.x86_num_cores > 1) {
-                for (i = 0; i < NR_CPUS; i++) {
-                        if (!cpu_isset(i, cpu_callout_map))
-                                continue;
-                        if (phys_proc_id[cpu] == phys_proc_id[i]) {
-                                cpu_set(i, cpu_core_map[cpu]);
-                                cpu_set(cpu, cpu_core_map[i]);
-                        }
-                }
-        } else {
+        if (current_cpu_data.x86_max_cores == 1) {
                 cpu_core_map[cpu] = cpu_sibling_map[cpu];
+                c[cpu].booted_cores = 1;
+                return;
+        }
+
+        for_each_cpu_mask(i, cpu_sibling_setup_map) {
+                if (phys_proc_id[cpu] == phys_proc_id[i]) {
+                        cpu_set(i, cpu_core_map[cpu]);
+                        cpu_set(cpu, cpu_core_map[i]);
+                        /*
+                         *  Does this new cpu bringup a new core?
+                         */
+                        if (cpus_weight(cpu_sibling_map[cpu]) == 1) {
+                                /*
+                                 * for each core in package, increment
+                                 * the booted_cores for this new cpu
+                                 */
+                                if (first_cpu(cpu_sibling_map[i]) == i)
+                                        c[cpu].booted_cores++;
+                                /*
+                                 * increment the core count for all
+                                 * the other cpus in this package
+                                 */
+                                if (i != cpu)
+                                        c[i].booted_cores++;
+                        } else if (i != cpu && !c[cpu].booted_cores)
+                                c[cpu].booted_cores = c[i].booted_cores;
+                }
         }
 }
 
@@ -1095,11 +1122,8 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
 
         current_thread_info()->cpu = 0;
         smp_tune_scheduling();
-        cpus_clear(cpu_sibling_map[0]);
-        cpu_set(0, cpu_sibling_map[0]);
 
-        cpus_clear(cpu_core_map[0]);
-        cpu_set(0, cpu_core_map[0]);
+        set_cpu_sibling_map(0);
 
         /*
          * If we couldn't find an SMP configuration at boot time,
@@ -1278,15 +1302,24 @@ static void
 remove_siblinginfo(int cpu)
 {
         int sibling;
+        struct cpuinfo_x86 *c = cpu_data;
 
+        for_each_cpu_mask(sibling, cpu_core_map[cpu]) {
+                cpu_clear(cpu, cpu_core_map[sibling]);
+                /*
+                 * last thread sibling in this cpu core going down
+                 */
+                if (cpus_weight(cpu_sibling_map[cpu]) == 1)
+                        c[sibling].booted_cores--;
+        }
+                        
         for_each_cpu_mask(sibling, cpu_sibling_map[cpu])
                 cpu_clear(cpu, cpu_sibling_map[sibling]);
-        for_each_cpu_mask(sibling, cpu_core_map[cpu])
-                cpu_clear(cpu, cpu_core_map[sibling]);
         cpus_clear(cpu_sibling_map[cpu]);
         cpus_clear(cpu_core_map[cpu]);
         phys_proc_id[cpu] = BAD_APICID;
         cpu_core_id[cpu] = BAD_APICID;
+        cpu_clear(cpu, cpu_sibling_setup_map);
 }
 
 int __cpu_disable(void)
diff --git a/arch/i386/kernel/srat.c b/arch/i386/kernel/srat.c
index 8de658db8146..52b3ed5d2cb5 100644
--- a/arch/i386/kernel/srat.c
+++ b/arch/i386/kernel/srat.c
@@ -137,8 +137,8 @@ static void __init parse_memory_affinity_structure (char *sratp)
                  "enabled and removable" : "enabled" ) );
 }
 
-#if MAX_NR_ZONES != 3
-#error "MAX_NR_ZONES != 3, chunk_to_zone requires review"
+#if MAX_NR_ZONES != 4
+#error "MAX_NR_ZONES != 4, chunk_to_zone requires review"
 #endif
 /* Take a chunk of pages from page frame cstart to cend and count the number
  * of pages in each zone, returned via zones[].