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-rw-r--r--arch/i386/kernel/apic.c2
-rw-r--r--arch/i386/kernel/apm.c97
-rw-r--r--arch/i386/kernel/cpu/amd.c7
-rw-r--r--arch/i386/kernel/cpu/common.c8
-rw-r--r--arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c3
-rw-r--r--arch/i386/kernel/cpu/cpufreq/powernow-k8.c50
-rw-r--r--arch/i386/kernel/cpu/cpufreq/powernow-k8.h9
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-ich.c47
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-lib.c32
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-lib.h1
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-smi.c1
-rw-r--r--arch/i386/kernel/cpu/cyrix.c27
-rw-r--r--arch/i386/kernel/cpu/proc.c6
-rw-r--r--arch/i386/kernel/cpuid.c3
-rw-r--r--arch/i386/kernel/entry.S1
-rw-r--r--arch/i386/kernel/head.S27
-rw-r--r--arch/i386/kernel/i386_ksyms.c3
-rw-r--r--arch/i386/kernel/io_apic.c4
-rw-r--r--arch/i386/kernel/kprobes.c2
-rw-r--r--arch/i386/kernel/mpparse.c26
-rw-r--r--arch/i386/kernel/msr.c3
-rw-r--r--arch/i386/kernel/process.c20
-rw-r--r--arch/i386/kernel/ptrace.c9
-rw-r--r--arch/i386/kernel/reboot.c6
-rw-r--r--arch/i386/kernel/setup.c8
-rw-r--r--arch/i386/kernel/smpboot.c9
-rw-r--r--arch/i386/kernel/syscall_table.S1
-rw-r--r--arch/i386/kernel/timers/timer_tsc.c2
-rw-r--r--arch/i386/kernel/traps.c42
29 files changed, 277 insertions, 179 deletions
diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c
index 496a2c9909fe..d8f94e78de8a 100644
--- a/arch/i386/kernel/apic.c
+++ b/arch/i386/kernel/apic.c
@@ -721,7 +721,7 @@ static int __init apic_set_verbosity(char *str)
apic_verbosity = APIC_VERBOSE;
else
printk(KERN_WARNING "APIC Verbosity level %s not recognised"
- " use apic=verbose or apic=debug", str);
+ " use apic=verbose or apic=debug\n", str);
return 0;
}
diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index 1e60acbed3c1..2d793d4aef1a 100644
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -303,17 +303,6 @@ extern int (*console_blank_hook)(int);
#include "apm.h"
/*
- * Define to make all _set_limit calls use 64k limits. The APM 1.1 BIOS is
- * supposed to provide limit information that it recognizes. Many machines
- * do this correctly, but many others do not restrict themselves to their
- * claimed limit. When this happens, they will cause a segmentation
- * violation in the kernel at boot time. Most BIOS's, however, will
- * respect a 64k limit, so we use that. If you want to be pedantic and
- * hold your BIOS to its claims, then undefine this.
- */
-#define APM_RELAX_SEGMENTS
-
-/*
* Define to re-initialize the interrupt 0 timer to 100 Hz after a suspend.
* This patched by Chad Miller <cmiller@surfsouth.com>, original code by
* David Chen <chen@ctpa04.mit.edu>
@@ -1075,22 +1064,23 @@ static int apm_engage_power_management(u_short device, int enable)
static int apm_console_blank(int blank)
{
- int error;
- u_short state;
+ int error, i;
+ u_short state;
+ static const u_short dev[3] = { 0x100, 0x1FF, 0x101 };
state = blank ? APM_STATE_STANDBY : APM_STATE_READY;
- /* Blank the first display device */
- error = set_power_state(0x100, state);
- if ((error != APM_SUCCESS) && (error != APM_NO_ERROR)) {
- /* try to blank them all instead */
- error = set_power_state(0x1ff, state);
- if ((error != APM_SUCCESS) && (error != APM_NO_ERROR))
- /* try to blank device one instead */
- error = set_power_state(0x101, state);
+
+ for (i = 0; i < ARRAY_SIZE(dev); i++) {
+ error = set_power_state(dev[i], state);
+
+ if ((error == APM_SUCCESS) || (error == APM_NO_ERROR))
+ return 1;
+
+ if (error == APM_NOT_ENGAGED)
+ break;
}
- if ((error == APM_SUCCESS) || (error == APM_NO_ERROR))
- return 1;
- if (error == APM_NOT_ENGAGED) {
+
+ if (error == APM_NOT_ENGAGED && state != APM_STATE_READY) {
static int tried;
int eng_error;
if (tried++ == 0) {
@@ -2233,8 +2223,8 @@ static struct dmi_system_id __initdata apm_dmi_table[] = {
static int __init apm_init(void)
{
struct proc_dir_entry *apm_proc;
+ struct desc_struct *gdt;
int ret;
- int i;
dmi_check_system(apm_dmi_table);
@@ -2312,45 +2302,30 @@ static int __init apm_init(void)
set_base(bad_bios_desc, __va((unsigned long)0x40 << 4));
_set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4));
+ /*
+ * Set up the long jump entry point to the APM BIOS, which is called
+ * from inline assembly.
+ */
apm_bios_entry.offset = apm_info.bios.offset;
apm_bios_entry.segment = APM_CS;
- for (i = 0; i < NR_CPUS; i++) {
- struct desc_struct *gdt = get_cpu_gdt_table(i);
- set_base(gdt[APM_CS >> 3],
- __va((unsigned long)apm_info.bios.cseg << 4));
- set_base(gdt[APM_CS_16 >> 3],
- __va((unsigned long)apm_info.bios.cseg_16 << 4));
- set_base(gdt[APM_DS >> 3],
- __va((unsigned long)apm_info.bios.dseg << 4));
-#ifndef APM_RELAX_SEGMENTS
- if (apm_info.bios.version == 0x100) {
-#endif
- /* For ASUS motherboard, Award BIOS rev 110 (and others?) */
- _set_limit((char *)&gdt[APM_CS >> 3], 64 * 1024 - 1);
- /* For some unknown machine. */
- _set_limit((char *)&gdt[APM_CS_16 >> 3], 64 * 1024 - 1);
- /* For the DEC Hinote Ultra CT475 (and others?) */
- _set_limit((char *)&gdt[APM_DS >> 3], 64 * 1024 - 1);
-#ifndef APM_RELAX_SEGMENTS
- } else {
- _set_limit((char *)&gdt[APM_CS >> 3],
- (apm_info.bios.cseg_len - 1) & 0xffff);
- _set_limit((char *)&gdt[APM_CS_16 >> 3],
- (apm_info.bios.cseg_16_len - 1) & 0xffff);
- _set_limit((char *)&gdt[APM_DS >> 3],
- (apm_info.bios.dseg_len - 1) & 0xffff);
- /* workaround for broken BIOSes */
- if (apm_info.bios.cseg_len <= apm_info.bios.offset)
- _set_limit((char *)&gdt[APM_CS >> 3], 64 * 1024 -1);
- if (apm_info.bios.dseg_len <= 0x40) { /* 0x40 * 4kB == 64kB */
- /* for the BIOS that assumes granularity = 1 */
- gdt[APM_DS >> 3].b |= 0x800000;
- printk(KERN_NOTICE "apm: we set the granularity of dseg.\n");
- }
- }
-#endif
- }
+ /*
+ * The APM 1.1 BIOS is supposed to provide limit information that it
+ * recognizes. Many machines do this correctly, but many others do
+ * not restrict themselves to their claimed limit. When this happens,
+ * they will cause a segmentation violation in the kernel at boot time.
+ * Most BIOS's, however, will respect a 64k limit, so we use that.
+ *
+ * Note we only set APM segments on CPU zero, since we pin the APM
+ * code to that CPU.
+ */
+ gdt = get_cpu_gdt_table(0);
+ set_base(gdt[APM_CS >> 3],
+ __va((unsigned long)apm_info.bios.cseg << 4));
+ set_base(gdt[APM_CS_16 >> 3],
+ __va((unsigned long)apm_info.bios.cseg_16 << 4));
+ set_base(gdt[APM_DS >> 3],
+ __va((unsigned long)apm_info.bios.dseg << 4));
apm_proc = create_proc_info_entry("apm", 0, NULL, apm_get_info);
if (apm_proc)
diff --git a/arch/i386/kernel/cpu/amd.c b/arch/i386/kernel/cpu/amd.c
index e344ef88cfcd..e7697e077f6b 100644
--- a/arch/i386/kernel/cpu/amd.c
+++ b/arch/i386/kernel/cpu/amd.c
@@ -161,8 +161,13 @@ static void __init init_amd(struct cpuinfo_x86 *c)
set_bit(X86_FEATURE_K6_MTRR, c->x86_capability);
break;
}
- break;
+ if (c->x86_model == 10) {
+ /* AMD Geode LX is model 10 */
+ /* placeholder for any needed mods */
+ break;
+ }
+ break;
case 6: /* An Athlon/Duron */
/* Bit 15 of Athlon specific MSR 15, needs to be 0
diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index 31e344b26bae..cca655688ffc 100644
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -18,9 +18,6 @@
#include "cpu.h"
-DEFINE_PER_CPU(struct desc_struct, cpu_gdt_table[GDT_ENTRIES]);
-EXPORT_PER_CPU_SYMBOL(cpu_gdt_table);
-
DEFINE_PER_CPU(unsigned char, cpu_16bit_stack[CPU_16BIT_STACK_SIZE]);
EXPORT_PER_CPU_SYMBOL(cpu_16bit_stack);
@@ -599,11 +596,6 @@ void __devinit cpu_init(void)
load_idt(&idt_descr);
/*
- * Delete NT
- */
- __asm__("pushfl ; andl $0xffffbfff,(%esp) ; popfl");
-
- /*
* Set up and load the per-CPU TSS and LDT
*/
atomic_inc(&init_mm.mm_count);
diff --git a/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c b/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c
index 04a405345203..2b62dee35c6c 100644
--- a/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c
+++ b/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c
@@ -177,9 +177,10 @@ static unsigned int nforce2_fsb_read(int bootfsb)
*/
static int nforce2_set_fsb(unsigned int fsb)
{
- u32 pll, temp = 0;
+ u32 temp = 0;
unsigned int tfsb;
int diff;
+ int pll = 0;
if ((fsb > max_fsb) || (fsb < NFORCE2_MIN_FSB)) {
printk(KERN_ERR "cpufreq: FSB %d is out of range!\n", fsb);
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
index 68a1fc87f4ca..0fbbd4c1072e 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
@@ -45,7 +45,7 @@
#define PFX "powernow-k8: "
#define BFX PFX "BIOS error: "
-#define VERSION "version 1.50.4"
+#define VERSION "version 1.60.0"
#include "powernow-k8.h"
/* serialize freq changes */
@@ -216,10 +216,10 @@ static int write_new_vid(struct powernow_k8_data *data, u32 vid)
do {
wrmsr(MSR_FIDVID_CTL, lo, STOP_GRANT_5NS);
- if (i++ > 100) {
- printk(KERN_ERR PFX "internal error - pending bit very stuck - no further pstate changes possible\n");
- return 1;
- }
+ if (i++ > 100) {
+ printk(KERN_ERR PFX "internal error - pending bit very stuck - no further pstate changes possible\n");
+ return 1;
+ }
} while (query_current_values_with_pending_wait(data));
if (savefid != data->currfid) {
@@ -336,7 +336,7 @@ static int core_voltage_pre_transition(struct powernow_k8_data *data, u32 reqvid
/* Phase 2 - core frequency transition */
static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid)
{
- u32 vcoreqfid, vcocurrfid, vcofiddiff, savevid = data->currvid;
+ u32 vcoreqfid, vcocurrfid, vcofiddiff, fid_interval, savevid = data->currvid;
if ((reqfid < HI_FID_TABLE_BOTTOM) && (data->currfid < HI_FID_TABLE_BOTTOM)) {
printk(KERN_ERR PFX "ph2: illegal lo-lo transition 0x%x 0x%x\n",
@@ -359,9 +359,11 @@ static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid)
: vcoreqfid - vcocurrfid;
while (vcofiddiff > 2) {
+ (data->currfid & 1) ? (fid_interval = 1) : (fid_interval = 2);
+
if (reqfid > data->currfid) {
if (data->currfid > LO_FID_TABLE_TOP) {
- if (write_new_fid(data, data->currfid + 2)) {
+ if (write_new_fid(data, data->currfid + fid_interval)) {
return 1;
}
} else {
@@ -371,7 +373,7 @@ static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid)
}
}
} else {
- if (write_new_fid(data, data->currfid - 2))
+ if (write_new_fid(data, data->currfid - fid_interval))
return 1;
}
@@ -464,7 +466,7 @@ static int check_supported_cpu(unsigned int cpu)
set_cpus_allowed(current, cpumask_of_cpu(cpu));
if (smp_processor_id() != cpu) {
- printk(KERN_ERR "limiting to cpu %u failed\n", cpu);
+ printk(KERN_ERR PFX "limiting to cpu %u failed\n", cpu);
goto out;
}
@@ -474,7 +476,7 @@ static int check_supported_cpu(unsigned int cpu)
eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
if (((eax & CPUID_USE_XFAM_XMOD) != CPUID_USE_XFAM_XMOD) ||
((eax & CPUID_XFAM) != CPUID_XFAM_K8) ||
- ((eax & CPUID_XMOD) > CPUID_XMOD_REV_F)) {
+ ((eax & CPUID_XMOD) > CPUID_XMOD_REV_G)) {
printk(KERN_INFO PFX "Processor cpuid %x not supported\n", eax);
goto out;
}
@@ -517,22 +519,24 @@ static int check_pst_table(struct powernow_k8_data *data, struct pst_s *pst, u8
printk(KERN_ERR BFX "maxvid exceeded with pstate %d\n", j);
return -ENODEV;
}
- if ((pst[j].fid > MAX_FID)
- || (pst[j].fid & 1)
- || (j && (pst[j].fid < HI_FID_TABLE_BOTTOM))) {
+ if (pst[j].fid > MAX_FID) {
+ printk(KERN_ERR BFX "maxfid exceeded with pstate %d\n", j);
+ return -ENODEV;
+ }
+ if (j && (pst[j].fid < HI_FID_TABLE_BOTTOM)) {
/* Only first fid is allowed to be in "low" range */
- printk(KERN_ERR PFX "two low fids - %d : 0x%x\n", j, pst[j].fid);
+ printk(KERN_ERR BFX "two low fids - %d : 0x%x\n", j, pst[j].fid);
return -EINVAL;
}
if (pst[j].fid < lastfid)
lastfid = pst[j].fid;
}
if (lastfid & 1) {
- printk(KERN_ERR PFX "lastfid invalid\n");
+ printk(KERN_ERR BFX "lastfid invalid\n");
return -EINVAL;
}
if (lastfid > LO_FID_TABLE_TOP)
- printk(KERN_INFO PFX "first fid not from lo freq table\n");
+ printk(KERN_INFO BFX "first fid not from lo freq table\n");
return 0;
}
@@ -631,7 +635,7 @@ static int find_psb_table(struct powernow_k8_data *data)
dprintk("table vers: 0x%x\n", psb->tableversion);
if (psb->tableversion != PSB_VERSION_1_4) {
- printk(KERN_INFO BFX "PSB table is not v1.4\n");
+ printk(KERN_ERR BFX "PSB table is not v1.4\n");
return -ENODEV;
}
@@ -689,7 +693,7 @@ static int find_psb_table(struct powernow_k8_data *data)
* BIOS and Kernel Developer's Guide, which is available on
* www.amd.com
*/
- printk(KERN_INFO PFX "BIOS error - no PSB or ACPI _PSS objects\n");
+ printk(KERN_ERR PFX "BIOS error - no PSB or ACPI _PSS objects\n");
return -ENODEV;
}
@@ -912,7 +916,7 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi
set_cpus_allowed(current, cpumask_of_cpu(pol->cpu));
if (smp_processor_id() != pol->cpu) {
- printk(KERN_ERR "limiting to cpu %u failed\n", pol->cpu);
+ printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
goto err_out;
}
@@ -982,6 +986,9 @@ static int __init powernowk8_cpu_init(struct cpufreq_policy *pol)
cpumask_t oldmask = CPU_MASK_ALL;
int rc, i;
+ if (!cpu_online(pol->cpu))
+ return -ENODEV;
+
if (!check_supported_cpu(pol->cpu))
return -ENODEV;
@@ -1021,7 +1028,7 @@ static int __init powernowk8_cpu_init(struct cpufreq_policy *pol)
set_cpus_allowed(current, cpumask_of_cpu(pol->cpu));
if (smp_processor_id() != pol->cpu) {
- printk(KERN_ERR "limiting to cpu %u failed\n", pol->cpu);
+ printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
goto err_out;
}
@@ -1162,10 +1169,9 @@ static void __exit powernowk8_exit(void)
cpufreq_unregister_driver(&cpufreq_amd64_driver);
}
-MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com> and Mark Langsdorf <mark.langsdorf@amd.com.");
+MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com> and Mark Langsdorf <mark.langsdorf@amd.com>");
MODULE_DESCRIPTION("AMD Athlon 64 and Opteron processor frequency driver.");
MODULE_LICENSE("GPL");
late_initcall(powernowk8_init);
module_exit(powernowk8_exit);
-
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.h b/arch/i386/kernel/cpu/cpufreq/powernow-k8.h
index b1e85bb36396..d0de37d58e9a 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.h
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.h
@@ -42,7 +42,7 @@ struct powernow_k8_data {
#define CPUID_XFAM 0x0ff00000 /* extended family */
#define CPUID_XFAM_K8 0
#define CPUID_XMOD 0x000f0000 /* extended model */
-#define CPUID_XMOD_REV_F 0x00040000
+#define CPUID_XMOD_REV_G 0x00060000
#define CPUID_USE_XFAM_XMOD 0x00000f00
#define CPUID_GET_MAX_CAPABILITIES 0x80000000
#define CPUID_FREQ_VOLT_CAPABILITIES 0x80000007
@@ -86,13 +86,14 @@ struct powernow_k8_data {
* low fid table
* - lowest entry in the high fid table must be a <= 200MHz + 2 * the entry
* in the low fid table
- * - the parts can only step at 200 MHz intervals, so 1.9 GHz is never valid
+ * - the parts can only step at <= 200 MHz intervals, odd fid values are
+ * supported in revision G and later revisions.
* - lowest frequency must be >= interprocessor hypertransport link speed
* (only applies to MP systems obviously)
*/
/* fids (frequency identifiers) are arranged in 2 tables - lo and hi */
-#define LO_FID_TABLE_TOP 6 /* fid values marking the boundary */
+#define LO_FID_TABLE_TOP 7 /* fid values marking the boundary */
#define HI_FID_TABLE_BOTTOM 8 /* between the low and high tables */
#define LO_VCOFREQ_TABLE_TOP 1400 /* corresponding vco frequency values */
@@ -106,7 +107,7 @@ struct powernow_k8_data {
#define MIN_FREQ 800 /* Min and max freqs, per spec */
#define MAX_FREQ 5000
-#define INVALID_FID_MASK 0xffffffc1 /* not a valid fid if these bits are set */
+#define INVALID_FID_MASK 0xffffffc0 /* not a valid fid if these bits are set */
#define INVALID_VID_MASK 0xffffffc0 /* not a valid vid if these bits are set */
#define VID_OFF 0x3f
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c b/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c
index 5b7d18a06afa..b425cd3d1838 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c
@@ -40,6 +40,7 @@ static struct pci_dev *speedstep_chipset_dev;
*/
static unsigned int speedstep_processor = 0;
+static u32 pmbase;
/*
* There are only two frequency states for each processor. Values
@@ -56,34 +57,47 @@ static struct cpufreq_frequency_table speedstep_freqs[] = {
/**
- * speedstep_set_state - set the SpeedStep state
- * @state: new processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)
+ * speedstep_find_register - read the PMBASE address
*
- * Tries to change the SpeedStep state.
+ * Returns: -ENODEV if no register could be found
*/
-static void speedstep_set_state (unsigned int state)
+static int speedstep_find_register (void)
{
- u32 pmbase;
- u8 pm2_blk;
- u8 value;
- unsigned long flags;
-
- if (!speedstep_chipset_dev || (state > 0x1))
- return;
+ if (!speedstep_chipset_dev)
+ return -ENODEV;
/* get PMBASE */
pci_read_config_dword(speedstep_chipset_dev, 0x40, &pmbase);
if (!(pmbase & 0x01)) {
printk(KERN_ERR "speedstep-ich: could not find speedstep register\n");
- return;
+ return -ENODEV;
}
pmbase &= 0xFFFFFFFE;
if (!pmbase) {
printk(KERN_ERR "speedstep-ich: could not find speedstep register\n");
- return;
+ return -ENODEV;
}
+ dprintk("pmbase is 0x%x\n", pmbase);
+ return 0;
+}
+
+/**
+ * speedstep_set_state - set the SpeedStep state
+ * @state: new processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)
+ *
+ * Tries to change the SpeedStep state.
+ */
+static void speedstep_set_state (unsigned int state)
+{
+ u8 pm2_blk;
+ u8 value;
+ unsigned long flags;
+
+ if (state > 0x1)
+ return;
+
/* Disable IRQs */
local_irq_save(flags);
@@ -315,10 +329,11 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
cpus_allowed = current->cpus_allowed;
set_cpus_allowed(current, policy->cpus);
- /* detect low and high frequency */
+ /* detect low and high frequency and transition latency */
result = speedstep_get_freqs(speedstep_processor,
&speedstep_freqs[SPEEDSTEP_LOW].frequency,
&speedstep_freqs[SPEEDSTEP_HIGH].frequency,
+ &policy->cpuinfo.transition_latency,
&speedstep_set_state);
set_cpus_allowed(current, cpus_allowed);
if (result)
@@ -335,7 +350,6 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
/* cpuinfo and default policy values */
policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
- policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
policy->cur = speed;
result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs);
@@ -400,6 +414,9 @@ static int __init speedstep_init(void)
return -EINVAL;
}
+ if (speedstep_find_register())
+ return -ENODEV;
+
return cpufreq_register_driver(&speedstep_driver);
}
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c
index d368b3f5fce8..7c47005a1805 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c
@@ -320,11 +320,13 @@ EXPORT_SYMBOL_GPL(speedstep_detect_processor);
unsigned int speedstep_get_freqs(unsigned int processor,
unsigned int *low_speed,
unsigned int *high_speed,
+ unsigned int *transition_latency,
void (*set_state) (unsigned int state))
{
unsigned int prev_speed;
unsigned int ret = 0;
unsigned long flags;
+ struct timeval tv1, tv2;
if ((!processor) || (!low_speed) || (!high_speed) || (!set_state))
return -EINVAL;
@@ -337,7 +339,7 @@ unsigned int speedstep_get_freqs(unsigned int processor,
return -EIO;
dprintk("previous speed is %u\n", prev_speed);
-
+
local_irq_save(flags);
/* switch to low state */
@@ -350,8 +352,17 @@ unsigned int speedstep_get_freqs(unsigned int processor,
dprintk("low speed is %u\n", *low_speed);
+ /* start latency measurement */
+ if (transition_latency)
+ do_gettimeofday(&tv1);
+
/* switch to high state */
set_state(SPEEDSTEP_HIGH);
+
+ /* end latency measurement */
+ if (transition_latency)
+ do_gettimeofday(&tv2);
+
*high_speed = speedstep_get_processor_frequency(processor);
if (!*high_speed) {
ret = -EIO;
@@ -369,6 +380,25 @@ unsigned int speedstep_get_freqs(unsigned int processor,
if (*high_speed != prev_speed)
set_state(SPEEDSTEP_LOW);
+ if (transition_latency) {
+ *transition_latency = (tv2.tv_sec - tv1.tv_sec) * USEC_PER_SEC +
+ tv2.tv_usec - tv1.tv_usec;
+ dprintk("transition latency is %u uSec\n", *transition_latency);
+
+ /* convert uSec to nSec and add 20% for safety reasons */
+ *transition_latency *= 1200;
+
+ /* check if the latency measurement is too high or too low
+ * and set it to a safe value (500uSec) in that case
+ */
+ if (*transition_latency > 10000000 || *transition_latency < 50000) {
+ printk (KERN_WARNING "speedstep: frequency transition measured seems out of "
+ "range (%u nSec), falling back to a safe one of %u nSec.\n",
+ *transition_latency, 500000);
+ *transition_latency = 500000;
+ }
+ }
+
out:
local_irq_restore(flags);
return (ret);
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h
index 261a2c9b7f6b..6a727fd3a77e 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h
@@ -44,4 +44,5 @@ extern unsigned int speedstep_get_processor_frequency(unsigned int processor);
extern unsigned int speedstep_get_freqs(unsigned int processor,
unsigned int *low_speed,
unsigned int *high_speed,
+ unsigned int *transition_latency,
void (*set_state) (unsigned int state));
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c b/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
index 2718fb6f6aba..28cc5d524afc 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
@@ -269,6 +269,7 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
result = speedstep_get_freqs(speedstep_processor,
&speedstep_freqs[SPEEDSTEP_LOW].frequency,
&speedstep_freqs[SPEEDSTEP_HIGH].frequency,
+ NULL,
&speedstep_set_state);
if (result) {
diff --git a/arch/i386/kernel/cpu/cyrix.c b/arch/i386/kernel/cpu/cyrix.c
index ff87cc22b323..75015975d038 100644
--- a/arch/i386/kernel/cpu/cyrix.c
+++ b/arch/i386/kernel/cpu/cyrix.c
@@ -343,6 +343,31 @@ static void __init init_cyrix(struct cpuinfo_x86 *c)
}
/*
+ * Handle National Semiconductor branded processors
+ */
+static void __devinit init_nsc(struct cpuinfo_x86 *c)
+{
+ /* There may be GX1 processors in the wild that are branded
+ * NSC and not Cyrix.
+ *
+ * This function only handles the GX processor, and kicks every
+ * thing else to the Cyrix init function above - that should
+ * cover any processors that might have been branded differently
+ * after NSC aquired Cyrix.
+ *
+ * If this breaks your GX1 horribly, please e-mail
+ * info-linux@ldcmail.amd.com to tell us.
+ */
+
+ /* Handle the GX (Formally known as the GX2) */
+
+ if (c->x86 == 5 && c->x86_model == 5)
+ display_cacheinfo(c);
+ else
+ init_cyrix(c);
+}
+
+/*
* Cyrix CPUs without cpuid or with cpuid not yet enabled can be detected
* by the fact that they preserve the flags across the division of 5/2.
* PII and PPro exhibit this behavior too, but they have cpuid available.
@@ -422,7 +447,7 @@ int __init cyrix_init_cpu(void)
static struct cpu_dev nsc_cpu_dev __initdata = {
.c_vendor = "NSC",
.c_ident = { "Geode by NSC" },
- .c_init = init_cyrix,
+ .c_init = init_nsc,
.c_identify = generic_identify,
};
diff --git a/arch/i386/kernel/cpu/proc.c b/arch/i386/kernel/cpu/proc.c
index e7921315ae9d..6d91b274589c 100644
--- a/arch/i386/kernel/cpu/proc.c
+++ b/arch/i386/kernel/cpu/proc.c
@@ -3,6 +3,7 @@
#include <linux/string.h>
#include <asm/semaphore.h>
#include <linux/seq_file.h>
+#include <linux/cpufreq.h>
/*
* Get CPU information for use by the procfs.
@@ -86,8 +87,11 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_printf(m, "stepping\t: unknown\n");
if ( cpu_has(c, X86_FEATURE_TSC) ) {
+ unsigned int freq = cpufreq_quick_get(n);
+ if (!freq)
+ freq = cpu_khz;
seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
- cpu_khz / 1000, (cpu_khz % 1000));
+ freq / 1000, (freq % 1000));
}
/* Cache size */
diff --git a/arch/i386/kernel/cpuid.c b/arch/i386/kernel/cpuid.c
index 13bae799e626..006141d1c12a 100644
--- a/arch/i386/kernel/cpuid.c
+++ b/arch/i386/kernel/cpuid.c
@@ -117,14 +117,13 @@ static ssize_t cpuid_read(struct file *file, char __user *buf,
{
char __user *tmp = buf;
u32 data[4];
- size_t rv;
u32 reg = *ppos;
int cpu = iminor(file->f_dentry->d_inode);
if (count % 16)
return -EINVAL; /* Invalid chunk size */
- for (rv = 0; count; count -= 16) {
+ for (; count; count -= 16) {
do_cpuid(cpu, reg, data);
if (copy_to_user(tmp, &data, 16))
return -EFAULT;
diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S
index e50b93155249..607c06007508 100644
--- a/arch/i386/kernel/entry.S
+++ b/arch/i386/kernel/entry.S
@@ -657,6 +657,7 @@ ENTRY(spurious_interrupt_bug)
pushl $do_spurious_interrupt_bug
jmp error_code
+.section .rodata,"a"
#include "syscall_table.S"
syscall_table_size=(.-sys_call_table)
diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S
index e437fb367498..5884469f6bfe 100644
--- a/arch/i386/kernel/head.S
+++ b/arch/i386/kernel/head.S
@@ -504,19 +504,24 @@ ENTRY(cpu_gdt_table)
.quad 0x0000000000000000 /* 0x80 TSS descriptor */
.quad 0x0000000000000000 /* 0x88 LDT descriptor */
- /* Segments used for calling PnP BIOS */
- .quad 0x00c09a0000000000 /* 0x90 32-bit code */
- .quad 0x00809a0000000000 /* 0x98 16-bit code */
- .quad 0x0080920000000000 /* 0xa0 16-bit data */
- .quad 0x0080920000000000 /* 0xa8 16-bit data */
- .quad 0x0080920000000000 /* 0xb0 16-bit data */
+ /*
+ * Segments used for calling PnP BIOS have byte granularity.
+ * They code segments and data segments have fixed 64k limits,
+ * the transfer segment sizes are set at run time.
+ */
+ .quad 0x00409a000000ffff /* 0x90 32-bit code */
+ .quad 0x00009a000000ffff /* 0x98 16-bit code */
+ .quad 0x000092000000ffff /* 0xa0 16-bit data */
+ .quad 0x0000920000000000 /* 0xa8 16-bit data */
+ .quad 0x0000920000000000 /* 0xb0 16-bit data */
+
/*
* The APM segments have byte granularity and their bases
- * and limits are set at run time.
+ * are set at run time. All have 64k limits.
*/
- .quad 0x00409a0000000000 /* 0xb8 APM CS code */
- .quad 0x00009a0000000000 /* 0xc0 APM CS 16 code (16 bit) */
- .quad 0x0040920000000000 /* 0xc8 APM DS data */
+ .quad 0x00409a000000ffff /* 0xb8 APM CS code */
+ .quad 0x00009a000000ffff /* 0xc0 APM CS 16 code (16 bit) */
+ .quad 0x004092000000ffff /* 0xc8 APM DS data */
.quad 0x0000920000000000 /* 0xd0 - ESPFIX 16-bit SS */
.quad 0x0000000000000000 /* 0xd8 - unused */
@@ -525,3 +530,5 @@ ENTRY(cpu_gdt_table)
.quad 0x0000000000000000 /* 0xf0 - unused */
.quad 0x0000000000000000 /* 0xf8 - GDT entry 31: double-fault TSS */
+ /* Be sure this is zeroed to avoid false validations in Xen */
+ .fill PAGE_SIZE_asm / 8 - GDT_ENTRIES,8,0
diff --git a/arch/i386/kernel/i386_ksyms.c b/arch/i386/kernel/i386_ksyms.c
index 180f070d03cb..3999bec50c33 100644
--- a/arch/i386/kernel/i386_ksyms.c
+++ b/arch/i386/kernel/i386_ksyms.c
@@ -3,8 +3,7 @@
#include <asm/checksum.h>
#include <asm/desc.h>
-/* This is definitely a GPL-only symbol */
-EXPORT_SYMBOL_GPL(cpu_gdt_table);
+EXPORT_SYMBOL_GPL(cpu_gdt_descr);
EXPORT_SYMBOL(__down_failed);
EXPORT_SYMBOL(__down_failed_interruptible);
diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c
index 22c8675c79f4..7554f8fd874a 100644
--- a/arch/i386/kernel/io_apic.c
+++ b/arch/i386/kernel/io_apic.c
@@ -1722,8 +1722,8 @@ void disable_IO_APIC(void)
entry.dest_mode = 0; /* Physical */
entry.delivery_mode = dest_ExtINT; /* ExtInt */
entry.vector = 0;
- entry.dest.physical.physical_dest = 0;
-
+ entry.dest.physical.physical_dest =
+ GET_APIC_ID(apic_read(APIC_ID));
/*
* Add it to the IO-APIC irq-routing table:
diff --git a/arch/i386/kernel/kprobes.c b/arch/i386/kernel/kprobes.c
index 32b0c24ab9a6..19edcd526ba4 100644
--- a/arch/i386/kernel/kprobes.c
+++ b/arch/i386/kernel/kprobes.c
@@ -191,7 +191,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
*/
save_previous_kprobe(kcb);
set_current_kprobe(p, regs, kcb);
- p->nmissed++;
+ kprobes_inc_nmissed_count(p);
prepare_singlestep(p, regs);
kcb->kprobe_status = KPROBE_REENTER;
return 1;
diff --git a/arch/i386/kernel/mpparse.c b/arch/i386/kernel/mpparse.c
index d7cede83ba2e..0102f3d50e57 100644
--- a/arch/i386/kernel/mpparse.c
+++ b/arch/i386/kernel/mpparse.c
@@ -38,6 +38,12 @@
int smp_found_config;
unsigned int __initdata maxcpus = NR_CPUS;
+#ifdef CONFIG_HOTPLUG_CPU
+#define CPU_HOTPLUG_ENABLED (1)
+#else
+#define CPU_HOTPLUG_ENABLED (0)
+#endif
+
/*
* Various Linux-internal data structures created from the
* MP-table.
@@ -219,14 +225,18 @@ static void __devinit MP_processor_info (struct mpc_config_processor *m)
cpu_set(num_processors, cpu_possible_map);
num_processors++;
- if ((num_processors > 8) &&
- ((APIC_XAPIC(ver) &&
- (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)) ||
- (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)))
- def_to_bigsmp = 1;
- else
- def_to_bigsmp = 0;
-
+ if (CPU_HOTPLUG_ENABLED || (num_processors > 8)) {
+ switch (boot_cpu_data.x86_vendor) {
+ case X86_VENDOR_INTEL:
+ if (!APIC_XAPIC(ver)) {
+ def_to_bigsmp = 0;
+ break;
+ }
+ /* If P4 and above fall through */
+ case X86_VENDOR_AMD:
+ def_to_bigsmp = 1;
+ }
+ }
bios_cpu_apicid[num_processors - 1] = m->mpc_apicid;
}
diff --git a/arch/i386/kernel/msr.c b/arch/i386/kernel/msr.c
index 44470fea4309..1d0a55e68760 100644
--- a/arch/i386/kernel/msr.c
+++ b/arch/i386/kernel/msr.c
@@ -172,7 +172,6 @@ static ssize_t msr_read(struct file *file, char __user * buf,
{
u32 __user *tmp = (u32 __user *) buf;
u32 data[2];
- size_t rv;
u32 reg = *ppos;
int cpu = iminor(file->f_dentry->d_inode);
int err;
@@ -180,7 +179,7 @@ static ssize_t msr_read(struct file *file, char __user * buf,
if (count % 8)
return -EINVAL; /* Invalid chunk size */
- for (rv = 0; count; count -= 8) {
+ for (; count; count -= 8) {
err = do_rdmsr(cpu, reg, &data[0], &data[1]);
if (err)
return err;
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c
index df6c2bcde067..45e7f0ac4b04 100644
--- a/arch/i386/kernel/process.c
+++ b/arch/i386/kernel/process.c
@@ -308,9 +308,7 @@ void show_regs(struct pt_regs * regs)
cr0 = read_cr0();
cr2 = read_cr2();
cr3 = read_cr3();
- if (current_cpu_data.x86 > 4) {
- cr4 = read_cr4();
- }
+ cr4 = read_cr4_safe();
printk("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n", cr0, cr2, cr3, cr4);
show_trace(NULL, &regs->esp);
}
@@ -404,17 +402,7 @@ void flush_thread(void)
void release_thread(struct task_struct *dead_task)
{
- if (dead_task->mm) {
- // temporary debugging check
- if (dead_task->mm->context.size) {
- printk("WARNING: dead process %8s still has LDT? <%p/%d>\n",
- dead_task->comm,
- dead_task->mm->context.ldt,
- dead_task->mm->context.size);
- BUG();
- }
- }
-
+ BUG_ON(dead_task->mm);
release_vm86_irqs(dead_task);
}
@@ -554,7 +542,9 @@ int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
struct pt_regs ptregs;
ptregs = *(struct pt_regs *)
- ((unsigned long)tsk->thread_info+THREAD_SIZE - sizeof(ptregs));
+ ((unsigned long)tsk->thread_info +
+ /* see comments in copy_thread() about -8 */
+ THREAD_SIZE - sizeof(ptregs) - 8);
ptregs.xcs &= 0xffff;
ptregs.xds &= 0xffff;
ptregs.xes &= 0xffff;
diff --git a/arch/i386/kernel/ptrace.c b/arch/i386/kernel/ptrace.c
index 5ffbb4b7ad05..5c1fb6aada5b 100644
--- a/arch/i386/kernel/ptrace.c
+++ b/arch/i386/kernel/ptrace.c
@@ -32,9 +32,12 @@
* in exit.c or in signal.c.
*/
-/* determines which flags the user has access to. */
-/* 1 = access 0 = no access */
-#define FLAG_MASK 0x00044dd5
+/*
+ * Determines which flags the user has access to [1 = access, 0 = no access].
+ * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).
+ * Also masks reserved bits (31-22, 15, 5, 3, 1).
+ */
+#define FLAG_MASK 0x00054dd5
/* set's the trap flag. */
#define TRAP_FLAG 0x100
diff --git a/arch/i386/kernel/reboot.c b/arch/i386/kernel/reboot.c
index 2afe0f8d555a..2fa5803a759d 100644
--- a/arch/i386/kernel/reboot.c
+++ b/arch/i386/kernel/reboot.c
@@ -111,12 +111,12 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"),
},
},
- { /* Handle problems with rebooting on HP nc6120 */
+ { /* Handle problems with rebooting on HP laptops */
.callback = set_bios_reboot,
- .ident = "HP Compaq nc6120",
+ .ident = "HP Compaq Laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nc6120"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"),
},
},
{ }
diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index fdfcb0cba9b4..27c956db0461 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -954,6 +954,12 @@ efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
return 0;
}
+static int __init
+efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
+{
+ memory_present(0, start, end);
+ return 0;
+}
/*
* Find the highest page frame number we have available
@@ -965,6 +971,7 @@ void __init find_max_pfn(void)
max_pfn = 0;
if (efi_enabled) {
efi_memmap_walk(efi_find_max_pfn, &max_pfn);
+ efi_memmap_walk(efi_memory_present_wrapper, NULL);
return;
}
@@ -979,6 +986,7 @@ void __init find_max_pfn(void)
continue;
if (end > max_pfn)
max_pfn = end;
+ memory_present(0, start, end);
}
}
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index d16520da4550..b3c2e2c26743 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -903,6 +903,12 @@ static int __devinit do_boot_cpu(int apicid, int cpu)
unsigned long start_eip;
unsigned short nmi_high = 0, nmi_low = 0;
+ if (!cpu_gdt_descr[cpu].address &&
+ !(cpu_gdt_descr[cpu].address = get_zeroed_page(GFP_KERNEL))) {
+ printk("Failed to allocate GDT for CPU %d\n", cpu);
+ return 1;
+ }
+
++cpucount;
/*
@@ -1338,8 +1344,7 @@ int __cpu_disable(void)
if (cpu == 0)
return -EBUSY;
- /* We enable the timer again on the exit path of the death loop */
- disable_APIC_timer();
+ clear_local_APIC();
/* Allow any queued timer interrupts to get serviced */
local_irq_enable();
mdelay(1);
diff --git a/arch/i386/kernel/syscall_table.S b/arch/i386/kernel/syscall_table.S
index 9b21a31d4f4e..f7ba4acc20ec 100644
--- a/arch/i386/kernel/syscall_table.S
+++ b/arch/i386/kernel/syscall_table.S
@@ -1,4 +1,3 @@
-.data
ENTRY(sys_call_table)
.long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */
.long sys_exit
diff --git a/arch/i386/kernel/timers/timer_tsc.c b/arch/i386/kernel/timers/timer_tsc.c
index d395e3b42485..47675bbbb316 100644
--- a/arch/i386/kernel/timers/timer_tsc.c
+++ b/arch/i386/kernel/timers/timer_tsc.c
@@ -330,7 +330,9 @@ int recalibrate_cpu_khz(void)
unsigned int cpu_khz_old = cpu_khz;
if (cpu_has_tsc) {
+ local_irq_disable();
init_cpu_khz();
+ local_irq_enable();
cpu_data[0].loops_per_jiffy =
cpufreq_scale(cpu_data[0].loops_per_jiffy,
cpu_khz_old,
diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index c34d1bfc5161..53ad954e3ba4 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -306,14 +306,17 @@ void die(const char * str, struct pt_regs * regs, long err)
.lock_owner_depth = 0
};
static int die_counter;
+ unsigned long flags;
if (die.lock_owner != raw_smp_processor_id()) {
console_verbose();
- spin_lock_irq(&die.lock);
+ spin_lock_irqsave(&die.lock, flags);
die.lock_owner = smp_processor_id();
die.lock_owner_depth = 0;
bust_spinlocks(1);
}
+ else
+ local_save_flags(flags);
if (++die.lock_owner_depth < 3) {
int nl = 0;
@@ -340,7 +343,7 @@ void die(const char * str, struct pt_regs * regs, long err)
bust_spinlocks(0);
die.lock_owner = -1;
- spin_unlock_irq(&die.lock);
+ spin_unlock_irqrestore(&die.lock, flags);
if (kexec_should_crash(current))
crash_kexec(regs);
@@ -452,7 +455,7 @@ DO_VM86_ERROR( 3, SIGTRAP, "int3", int3)
#endif
DO_VM86_ERROR( 4, SIGSEGV, "overflow", overflow)
DO_VM86_ERROR( 5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO( 6, SIGILL, "invalid operand", invalid_op, ILL_ILLOPN, regs->eip)
+DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip)
DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
@@ -650,13 +653,6 @@ fastcall void do_nmi(struct pt_regs * regs, long error_code)
cpu = smp_processor_id();
-#ifdef CONFIG_HOTPLUG_CPU
- if (!cpu_online(cpu)) {
- nmi_exit();
- return;
- }
-#endif
-
++nmi_count(cpu);
if (!rcu_dereference(nmi_callback)(regs, cpu))
@@ -1082,9 +1078,9 @@ void __init trap_init(void)
set_trap_gate(0,&divide_error);
set_intr_gate(1,&debug);
set_intr_gate(2,&nmi);
- set_system_intr_gate(3, &int3); /* int3-5 can be called from all */
+ set_system_intr_gate(3, &int3); /* int3/4 can be called from all */
set_system_gate(4,&overflow);
- set_system_gate(5,&bounds);
+ set_trap_gate(5,&bounds);
set_trap_gate(6,&invalid_op);
set_trap_gate(7,&device_not_available);
set_task_gate(8,GDT_ENTRY_DOUBLEFAULT_TSS);
@@ -1102,6 +1098,28 @@ void __init trap_init(void)
#endif
set_trap_gate(19,&simd_coprocessor_error);
+ if (cpu_has_fxsr) {
+ /*
+ * Verify that the FXSAVE/FXRSTOR data will be 16-byte aligned.
+ * Generates a compile-time "error: zero width for bit-field" if
+ * the alignment is wrong.
+ */
+ struct fxsrAlignAssert {
+ int _:!(offsetof(struct task_struct,
+ thread.i387.fxsave) & 15);
+ };
+
+ printk(KERN_INFO "Enabling fast FPU save and restore... ");
+ set_in_cr4(X86_CR4_OSFXSR);
+ printk("done.\n");
+ }
+ if (cpu_has_xmm) {
+ printk(KERN_INFO "Enabling unmasked SIMD FPU exception "
+ "support... ");
+ set_in_cr4(X86_CR4_OSXMMEXCPT);
+ printk("done.\n");
+ }
+
set_system_gate(SYSCALL_VECTOR,&system_call);
/*
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