6 files changed, 71 insertions, 101 deletions

diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index 84a8220a607..a6ef672adbb 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -56,9 +56,22 @@ void __cpuinit validate_pat_support(struct cpuinfo_x86 *c)
 
         switch (c->x86_vendor) {
         case X86_VENDOR_INTEL:
-                if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))
+                /*
+                 * There is a known erratum on Pentium III and Core Solo
+                 * and Core Duo CPUs.
+                 * " Page with PAT set to WC while associated MTRR is UC
+                 *   may consolidate to UC "
+                 * Because of this erratum, it is better to stick with
+                 * setting WC in MTRR rather than using PAT on these CPUs.
+                 *
+                 * Enable PAT WC only on P4, Core 2 or later CPUs.
+                 */
+                if (c->x86 > 0x6 || (c->x86 == 6 && c->x86_model >= 15))
                         return;
-                break;
+
+                pat_disable("PAT WC disabled due to known CPU erratum.");
+                return;
+
         case X86_VENDOR_AMD:
         case X86_VENDOR_CENTAUR:
         case X86_VENDOR_TRANSMETA:
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 4e7271999a7..84bb395038d 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -737,63 +737,44 @@ static int find_psb_table(struct powernow_k8_data *data)
 #ifdef CONFIG_X86_POWERNOW_K8_ACPI
 static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index)
 {
-        if (!data->acpi_data->state_count || (cpu_family == CPU_HW_PSTATE))
+        if (!data->acpi_data.state_count || (cpu_family == CPU_HW_PSTATE))
                 return;
 
-        data->irt = (data->acpi_data->states[index].control >> IRT_SHIFT) & IRT_MASK;
-        data->rvo = (data->acpi_data->states[index].control >> RVO_SHIFT) & RVO_MASK;
-        data->exttype = (data->acpi_data->states[index].control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK;
-        data->plllock = (data->acpi_data->states[index].control >> PLL_L_SHIFT) & PLL_L_MASK;
-        data->vidmvs = 1 << ((data->acpi_data->states[index].control >> MVS_SHIFT) & MVS_MASK);
-        data->vstable = (data->acpi_data->states[index].control >> VST_SHIFT) & VST_MASK;
-}
-
-
-static struct acpi_processor_performance *acpi_perf_data;
-static int preregister_valid;
-
-static int powernow_k8_cpu_preinit_acpi(void)
-{
-        acpi_perf_data = alloc_percpu(struct acpi_processor_performance);
-        if (!acpi_perf_data)
-                return -ENODEV;
-
-        if (acpi_processor_preregister_performance(acpi_perf_data))
-                return -ENODEV;
-        else
-                preregister_valid = 1;
-        return 0;
+        data->irt = (data->acpi_data.states[index].control >> IRT_SHIFT) & IRT_MASK;
+        data->rvo = (data->acpi_data.states[index].control >> RVO_SHIFT) & RVO_MASK;
+        data->exttype = (data->acpi_data.states[index].control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK;
+        data->plllock = (data->acpi_data.states[index].control >> PLL_L_SHIFT) & PLL_L_MASK;
+        data->vidmvs = 1 << ((data->acpi_data.states[index].control >> MVS_SHIFT) & MVS_MASK);
+        data->vstable = (data->acpi_data.states[index].control >> VST_SHIFT) & VST_MASK;
 }
 
 static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
 {
         struct cpufreq_frequency_table *powernow_table;
         int ret_val;
-        int cpu = 0;
 
-        data->acpi_data = percpu_ptr(acpi_perf_data, cpu);
-        if (acpi_processor_register_performance(data->acpi_data, data->cpu)) {
+        if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) {
                 dprintk("register performance failed: bad ACPI data\n");
                 return -EIO;
         }
 
         /* verify the data contained in the ACPI structures */
-        if (data->acpi_data->state_count <= 1) {
+        if (data->acpi_data.state_count <= 1) {
                 dprintk("No ACPI P-States\n");
                 goto err_out;
         }
 
-        if ((data->acpi_data->control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
-                (data->acpi_data->status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
+        if ((data->acpi_data.control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
+                (data->acpi_data.status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
                 dprintk("Invalid control/status registers (%x - %x)\n",
-                        data->acpi_data->control_register.space_id,
-                        data->acpi_data->status_register.space_id);
+                        data->acpi_data.control_register.space_id,
+                        data->acpi_data.status_register.space_id);
                 goto err_out;
         }
 
         /* fill in data->powernow_table */
         powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table)
-                * (data->acpi_data->state_count + 1)), GFP_KERNEL);
+                * (data->acpi_data.state_count + 1)), GFP_KERNEL);
         if (!powernow_table) {
                 dprintk("powernow_table memory alloc failure\n");
                 goto err_out;
@@ -806,12 +787,12 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
         if (ret_val)
                 goto err_out_mem;
 
-        powernow_table[data->acpi_data->state_count].frequency = CPUFREQ_TABLE_END;
-        powernow_table[data->acpi_data->state_count].index = 0;
+        powernow_table[data->acpi_data.state_count].frequency = CPUFREQ_TABLE_END;
+        powernow_table[data->acpi_data.state_count].index = 0;
         data->powernow_table = powernow_table;
 
         /* fill in data */
-        data->numps = data->acpi_data->state_count;
+        data->numps = data->acpi_data.state_count;
         if (first_cpu(per_cpu(cpu_core_map, data->cpu)) == data->cpu)
                 print_basics(data);
         powernow_k8_acpi_pst_values(data, 0);
@@ -819,31 +800,16 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
         /* notify BIOS that we exist */
         acpi_processor_notify_smm(THIS_MODULE);
 
-        /* determine affinity, from ACPI if available */
-        if (preregister_valid) {
-                if ((data->acpi_data->shared_type == CPUFREQ_SHARED_TYPE_ALL) ||
-                        (data->acpi_data->shared_type == CPUFREQ_SHARED_TYPE_ANY))
-                        data->starting_core_affinity = data->acpi_data->shared_cpu_map;
-                else
-                        data->starting_core_affinity = cpumask_of_cpu(data->cpu);
-        } else {
-        /* best guess from family if not */
-                if (cpu_family == CPU_HW_PSTATE)
-                        data->starting_core_affinity = cpumask_of_cpu(data->cpu);
-                else
-                        data->starting_core_affinity = per_cpu(cpu_core_map, data->cpu);
-        }
-
         return 0;
 
 err_out_mem:
         kfree(powernow_table);
 
 err_out:
-        acpi_processor_unregister_performance(data->acpi_data, data->cpu);
+        acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
 
         /* data->acpi_data.state_count informs us at ->exit() whether ACPI was used */
-        data->acpi_data->state_count = 0;
+        data->acpi_data.state_count = 0;
 
         return -ENODEV;
 }
@@ -855,10 +821,10 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpuf
         rdmsr(MSR_PSTATE_CUR_LIMIT, hi, lo);
         data->max_hw_pstate = (hi & HW_PSTATE_MAX_MASK) >> HW_PSTATE_MAX_SHIFT;
 
-        for (i = 0; i < data->acpi_data->state_count; i++) {
+        for (i = 0; i < data->acpi_data.state_count; i++) {
                 u32 index;
 
-                index = data->acpi_data->states[i].control & HW_PSTATE_MASK;
+                index = data->acpi_data.states[i].control & HW_PSTATE_MASK;
                 if (index > data->max_hw_pstate) {
                         printk(KERN_ERR PFX "invalid pstate %d - bad value %d.\n", i, index);
                         printk(KERN_ERR PFX "Please report to BIOS manufacturer\n");
@@ -874,7 +840,7 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpuf
 
                 powernow_table[i].index = index;
 
-                powernow_table[i].frequency = data->acpi_data->states[i].core_frequency * 1000;
+                powernow_table[i].frequency = data->acpi_data.states[i].core_frequency * 1000;
         }
         return 0;
 }
@@ -883,16 +849,16 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpuf
 {
         int i;
         int cntlofreq = 0;
-        for (i = 0; i < data->acpi_data->state_count; i++) {
+        for (i = 0; i < data->acpi_data.state_count; i++) {
                 u32 fid;
                 u32 vid;
 
                 if (data->exttype) {
-                        fid = data->acpi_data->states[i].status & EXT_FID_MASK;
-                        vid = (data->acpi_data->states[i].status >> VID_SHIFT) & EXT_VID_MASK;
+                        fid = data->acpi_data.states[i].status & EXT_FID_MASK;
+                        vid = (data->acpi_data.states[i].status >> VID_SHIFT) & EXT_VID_MASK;
                 } else {
-                        fid = data->acpi_data->states[i].control & FID_MASK;
-                        vid = (data->acpi_data->states[i].control >> VID_SHIFT) & VID_MASK;
+                        fid = data->acpi_data.states[i].control & FID_MASK;
+                        vid = (data->acpi_data.states[i].control >> VID_SHIFT) & VID_MASK;
                 }
 
                 dprintk("   %d : fid 0x%x, vid 0x%x\n", i, fid, vid);
@@ -933,10 +899,10 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpuf
                                 cntlofreq = i;
                 }
 
-                if (powernow_table[i].frequency != (data->acpi_data->states[i].core_frequency * 1000)) {
+                if (powernow_table[i].frequency != (data->acpi_data.states[i].core_frequency * 1000)) {
                         printk(KERN_INFO PFX "invalid freq entries %u kHz vs. %u kHz\n",
                                 powernow_table[i].frequency,
-                                (unsigned int) (data->acpi_data->states[i].core_frequency * 1000));
+                                (unsigned int) (data->acpi_data.states[i].core_frequency * 1000));
                         powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
                         continue;
                 }
@@ -946,12 +912,11 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpuf
 
 static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data)
 {
-        if (data->acpi_data->state_count)
-                acpi_processor_unregister_performance(data->acpi_data, data->cpu);
+        if (data->acpi_data.state_count)
+                acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
 }
 
 #else
-static int powernow_k8_cpu_preinit_acpi(void) { return -ENODEV; }
 static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data) { return -ENODEV; }
 static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data) { return; }
 static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index) { return; }
@@ -1136,7 +1101,7 @@ static int powernowk8_verify(struct cpufreq_policy *pol)
 static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
 {
         struct powernow_k8_data *data;
-        cpumask_t oldmask = CPU_MASK_ALL;
+        cpumask_t oldmask;
         int rc;
 
         if (!cpu_online(pol->cpu))
@@ -1209,7 +1174,10 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
         /* run on any CPU again */
         set_cpus_allowed_ptr(current, &oldmask);
 
-        pol->cpus = data->starting_core_affinity;
+        if (cpu_family == CPU_HW_PSTATE)
+                pol->cpus = cpumask_of_cpu(pol->cpu);
+        else
+                pol->cpus = per_cpu(cpu_core_map, pol->cpu);
         data->available_cores = &(pol->cpus);
 
         /* Take a crude guess here.
@@ -1332,7 +1300,6 @@ static int __cpuinit powernowk8_init(void)
         }
 
         if (supported_cpus == num_online_cpus()) {
-                powernow_k8_cpu_preinit_acpi();
                 printk(KERN_INFO PFX "Found %d %s "
                         "processors (%d cpu cores) (" VERSION ")\n",
                         num_online_nodes(),
@@ -1349,10 +1316,6 @@ static void __exit powernowk8_exit(void)
         dprintk("exit\n");
 
         cpufreq_unregister_driver(&cpufreq_amd64_driver);
-
-#ifdef CONFIG_X86_POWERNOW_K8_ACPI
-        free_percpu(acpi_perf_data);
-#endif
 }
 
 MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com> and Mark Langsdorf <mark.langsdorf@amd.com>");
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.h b/arch/x86/kernel/cpu/cpufreq/powernow-k8.h
index a62612cd4be..ab48cfed4d9 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.h
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.h
@@ -33,13 +33,12 @@ struct powernow_k8_data {
 #ifdef CONFIG_X86_POWERNOW_K8_ACPI
         /* the acpi table needs to be kept. it's only available if ACPI was
          * used to determine valid frequency/vid/fid states */
-        struct acpi_processor_performance *acpi_data;
+        struct acpi_processor_performance acpi_data;
 #endif
         /* we need to keep track of associated cores, but let cpufreq
          * handle hotplug events - so just point at cpufreq pol->cpus
          * structure */
         cpumask_t *available_cores;
-        cpumask_t starting_core_affinity;
 };
 
 
diff --git a/arch/x86/kernel/cpu/cyrix.c b/arch/x86/kernel/cpu/cyrix.c
index 3fd7a67bb06..e710a21bb6e 100644
--- a/arch/x86/kernel/cpu/cyrix.c
+++ b/arch/x86/kernel/cpu/cyrix.c
@@ -134,23 +134,6 @@ static void __cpuinit set_cx86_memwb(void)
         setCx86(CX86_CCR2, getCx86(CX86_CCR2) | 0x14);
 }
 
-static void __cpuinit set_cx86_inc(void)
-{
-        unsigned char ccr3;
-
-        printk(KERN_INFO "Enable Incrementor on Cyrix/NSC processor.\n");
-
-        ccr3 = getCx86(CX86_CCR3);
-        setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); /* enable MAPEN */
-        /* PCR1 -- Performance Control */
-        /* Incrementor on, whatever that is */
-        setCx86(CX86_PCR1, getCx86(CX86_PCR1) | 0x02);
-        /* PCR0 -- Performance Control */
-        /* Incrementor Margin 10 */
-        setCx86(CX86_PCR0, getCx86(CX86_PCR0) | 0x04);
-        setCx86(CX86_CCR3, ccr3);       /* disable MAPEN */
-}
-
 /*
  *      Configure later MediaGX and/or Geode processor.
  */
@@ -174,7 +157,6 @@ static void __cpuinit geode_configure(void)
 
         set_cx86_memwb();
         set_cx86_reorder();
-        set_cx86_inc();
 
         local_irq_restore(flags);
 }
diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
index 509bd3d9eac..cb7d3b6a80e 100644
--- a/arch/x86/kernel/cpu/mtrr/generic.c
+++ b/arch/x86/kernel/cpu/mtrr/generic.c
@@ -379,6 +379,7 @@ static void generic_get_mtrr(unsigned int reg, unsigned long *base,
                              unsigned long *size, mtrr_type *type)
 {
         unsigned int mask_lo, mask_hi, base_lo, base_hi;
+        unsigned int tmp, hi;
 
         rdmsr(MTRRphysMask_MSR(reg), mask_lo, mask_hi);
         if ((mask_lo & 0x800) == 0) {
@@ -392,8 +393,23 @@ static void generic_get_mtrr(unsigned int reg, unsigned long *base,
         rdmsr(MTRRphysBase_MSR(reg), base_lo, base_hi);
 
         /* Work out the shifted address mask. */
-        mask_lo = size_or_mask | mask_hi << (32 - PAGE_SHIFT)
-            | mask_lo >> PAGE_SHIFT;
+        tmp = mask_hi << (32 - PAGE_SHIFT) | mask_lo >> PAGE_SHIFT;
+        mask_lo = size_or_mask | tmp;
+        /* Expand tmp with high bits to all 1s*/
+        hi = fls(tmp);
+        if (hi > 0) {
+                tmp |= ~((1<<(hi - 1)) - 1);
+
+                if (tmp != mask_lo) {
+                        static int once = 1;
+
+                        if (once) {
+                                printk(KERN_INFO "mtrr: your BIOS has set up an incorrect mask, fixing it up.\n");
+                                once = 0;
+                        }
+                        mask_lo = tmp;
+                }
+        }
 
         /* This works correctly if size is a power of two, i.e. a
            contiguous range. */
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 6f23969c8fa..b117d7f8a56 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -1496,11 +1496,8 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
 
         /* kvm/qemu doesn't have mtrr set right, don't trim them all */
         if (!highest_pfn) {
-                if (!kvm_para_available()) {
-                        printk(KERN_WARNING
+                WARN(!kvm_para_available(), KERN_WARNING
                                 "WARNING: strange, CPU MTRRs all blank?\n");
-                        WARN_ON(1);
-                }
                 return 0;
         }