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-rw-r--r--arch/i386/kernel/Makefile3
-rw-r--r--arch/i386/kernel/acpi/boot.c2
-rw-r--r--arch/i386/kernel/acpi/wakeup.S5
-rw-r--r--arch/i386/kernel/cpu/cpufreq/Kconfig3
-rw-r--r--arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c12
-rw-r--r--arch/i386/kernel/cpu/cpufreq/longhaul.c221
-rw-r--r--arch/i386/kernel/cpu/intel_cacheinfo.c2
-rw-r--r--arch/i386/kernel/cpu/mcheck/mce.h2
-rw-r--r--arch/i386/kernel/crash.c2
-rw-r--r--arch/i386/kernel/entry.S2
-rw-r--r--arch/i386/kernel/ioport.c1
-rw-r--r--arch/i386/kernel/kprobes.c9
-rw-r--r--arch/i386/kernel/machine_kexec.c13
-rw-r--r--arch/i386/kernel/nmi.c1
-rw-r--r--arch/i386/kernel/process.c50
-rw-r--r--arch/i386/kernel/ptrace.c5
-rw-r--r--arch/i386/kernel/setup.c7
-rw-r--r--arch/i386/kernel/smpboot.c62
-rw-r--r--arch/i386/kernel/time.c7
-rw-r--r--arch/i386/kernel/traps.c71
-rw-r--r--arch/i386/kernel/vsyscall.lds.S1
21 files changed, 272 insertions, 209 deletions
diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile
index 1b452a1665c..ab98fc21a54 100644
--- a/arch/i386/kernel/Makefile
+++ b/arch/i386/kernel/Makefile
@@ -59,7 +59,8 @@ quiet_cmd_syscall = SYSCALL $@
export CPPFLAGS_vsyscall.lds += -P -C -U$(ARCH)
-vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1
+vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1 \
+ $(call ld-option, -Wl$(comma)--hash-style=sysv)
SYSCFLAGS_vsyscall-sysenter.so = $(vsyscall-flags)
SYSCFLAGS_vsyscall-int80.so = $(vsyscall-flags)
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index 0db6387025c..ee003bc0e8b 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -59,7 +59,7 @@ static inline int gsi_irq_sharing(int gsi) { return gsi; }
#define BAD_MADT_ENTRY(entry, end) ( \
(!entry) || (unsigned long)entry + sizeof(*entry) > end || \
- ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
+ ((acpi_table_entry_header *)entry)->length < sizeof(*entry))
#define PREFIX "ACPI: "
diff --git a/arch/i386/kernel/acpi/wakeup.S b/arch/i386/kernel/acpi/wakeup.S
index 9f408eee4e6..b781b38131c 100644
--- a/arch/i386/kernel/acpi/wakeup.S
+++ b/arch/i386/kernel/acpi/wakeup.S
@@ -292,7 +292,10 @@ ENTRY(do_suspend_lowlevel)
pushl $3
call acpi_enter_sleep_state
addl $4, %esp
- ret
+
+# In case of S3 failure, we'll emerge here. Jump
+# to ret_point to recover
+ jmp ret_point
.p2align 4,,7
ret_point:
call restore_registers
diff --git a/arch/i386/kernel/cpu/cpufreq/Kconfig b/arch/i386/kernel/cpu/cpufreq/Kconfig
index e44a4c6a4fe..ccc1edff5c9 100644
--- a/arch/i386/kernel/cpu/cpufreq/Kconfig
+++ b/arch/i386/kernel/cpu/cpufreq/Kconfig
@@ -96,6 +96,7 @@ config X86_POWERNOW_K8_ACPI
config X86_GX_SUSPMOD
tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
+ depends on PCI
help
This add the CPUFreq driver for NatSemi Geode processors which
support suspend modulation.
@@ -202,7 +203,7 @@ config X86_LONGRUN
config X86_LONGHAUL
tristate "VIA Cyrix III Longhaul"
select CPU_FREQ_TABLE
- depends on BROKEN
+ depends on ACPI_PROCESSOR
help
This adds the CPUFreq driver for VIA Samuel/CyrixIII,
VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
index 567b39bea07..e6ea00edcb5 100644
--- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -384,8 +384,7 @@ static int acpi_cpufreq_early_init_acpi(void)
}
/* Do initialization in ACPI core */
- acpi_processor_preregister_performance(acpi_perf_data);
- return 0;
+ return acpi_processor_preregister_performance(acpi_perf_data);
}
static int
@@ -568,16 +567,11 @@ static struct cpufreq_driver acpi_cpufreq_driver = {
static int __init
acpi_cpufreq_init (void)
{
- int result = 0;
-
dprintk("acpi_cpufreq_init\n");
- result = acpi_cpufreq_early_init_acpi();
+ acpi_cpufreq_early_init_acpi();
- if (!result)
- result = cpufreq_register_driver(&acpi_cpufreq_driver);
-
- return (result);
+ return cpufreq_register_driver(&acpi_cpufreq_driver);
}
diff --git a/arch/i386/kernel/cpu/cpufreq/longhaul.c b/arch/i386/kernel/cpu/cpufreq/longhaul.c
index 146f607e9c4..4f2c3aeef72 100644
--- a/arch/i386/kernel/cpu/cpufreq/longhaul.c
+++ b/arch/i386/kernel/cpu/cpufreq/longhaul.c
@@ -29,11 +29,13 @@
#include <linux/cpufreq.h>
#include <linux/slab.h>
#include <linux/string.h>
-#include <linux/pci.h>
#include <asm/msr.h>
#include <asm/timex.h>
#include <asm/io.h>
+#include <asm/acpi.h>
+#include <linux/acpi.h>
+#include <acpi/processor.h>
#include "longhaul.h"
@@ -56,6 +58,8 @@ static int minvid, maxvid;
static unsigned int minmult, maxmult;
static int can_scale_voltage;
static int vrmrev;
+static struct acpi_processor *pr = NULL;
+static struct acpi_processor_cx *cx = NULL;
/* Module parameters */
static int dont_scale_voltage;
@@ -118,84 +122,65 @@ static int longhaul_get_cpu_mult(void)
return eblcr_table[invalue];
}
+/* For processor with BCR2 MSR */
-static void do_powersaver(union msr_longhaul *longhaul,
- unsigned int clock_ratio_index)
+static void do_longhaul1(int cx_address, unsigned int clock_ratio_index)
{
- struct pci_dev *dev;
- unsigned long flags;
- unsigned int tmp_mask;
- int version;
- int i;
- u16 pci_cmd;
- u16 cmd_state[64];
+ union msr_bcr2 bcr2;
+ u32 t;
- switch (cpu_model) {
- case CPU_EZRA_T:
- version = 3;
- break;
- case CPU_NEHEMIAH:
- version = 0xf;
- break;
- default:
- return;
- }
+ rdmsrl(MSR_VIA_BCR2, bcr2.val);
+ /* Enable software clock multiplier */
+ bcr2.bits.ESOFTBF = 1;
+ bcr2.bits.CLOCKMUL = clock_ratio_index;
- rdmsrl(MSR_VIA_LONGHAUL, longhaul->val);
- longhaul->bits.SoftBusRatio = clock_ratio_index & 0xf;
- longhaul->bits.SoftBusRatio4 = (clock_ratio_index & 0x10) >> 4;
- longhaul->bits.EnableSoftBusRatio = 1;
- longhaul->bits.RevisionKey = 0;
+ /* Sync to timer tick */
+ safe_halt();
+ ACPI_FLUSH_CPU_CACHE();
+ /* Change frequency on next halt or sleep */
+ wrmsrl(MSR_VIA_BCR2, bcr2.val);
+ /* Invoke C3 */
+ inb(cx_address);
+ /* Dummy op - must do something useless after P_LVL3 read */
+ t = inl(acpi_fadt.xpm_tmr_blk.address);
+
+ /* Disable software clock multiplier */
+ local_irq_disable();
+ rdmsrl(MSR_VIA_BCR2, bcr2.val);
+ bcr2.bits.ESOFTBF = 0;
+ wrmsrl(MSR_VIA_BCR2, bcr2.val);
+}
- preempt_disable();
- local_irq_save(flags);
+/* For processor with Longhaul MSR */
- /*
- * get current pci bus master state for all devices
- * and clear bus master bit
- */
- dev = NULL;
- i = 0;
- do {
- dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
- if (dev != NULL) {
- pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
- cmd_state[i++] = pci_cmd;
- pci_cmd &= ~PCI_COMMAND_MASTER;
- pci_write_config_word(dev, PCI_COMMAND, pci_cmd);
- }
- } while (dev != NULL);
+static void do_powersaver(int cx_address, unsigned int clock_ratio_index)
+{
+ union msr_longhaul longhaul;
+ u32 t;
- tmp_mask=inb(0x21); /* works on C3. save mask. */
- outb(0xFE,0x21); /* TMR0 only */
- outb(0xFF,0x80); /* delay */
+ rdmsrl(MSR_VIA_LONGHAUL, longhaul.val);
+ longhaul.bits.RevisionKey = longhaul.bits.RevisionID;
+ longhaul.bits.SoftBusRatio = clock_ratio_index & 0xf;
+ longhaul.bits.SoftBusRatio4 = (clock_ratio_index & 0x10) >> 4;
+ longhaul.bits.EnableSoftBusRatio = 1;
+ /* Sync to timer tick */
safe_halt();
- wrmsrl(MSR_VIA_LONGHAUL, longhaul->val);
- halt();
-
+ ACPI_FLUSH_CPU_CACHE();
+ /* Change frequency on next halt or sleep */
+ wrmsrl(MSR_VIA_LONGHAUL, longhaul.val);
+ /* Invoke C3 */
+ inb(cx_address);
+ /* Dummy op - must do something useless after P_LVL3 read */
+ t = inl(acpi_fadt.xpm_tmr_blk.address);
+
+ /* Disable bus ratio bit */
local_irq_disable();
-
- outb(tmp_mask,0x21); /* restore mask */
-
- /* restore pci bus master state for all devices */
- dev = NULL;
- i = 0;
- do {
- dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
- if (dev != NULL) {
- pci_cmd = cmd_state[i++];
- pci_write_config_byte(dev, PCI_COMMAND, pci_cmd);
- }
- } while (dev != NULL);
- local_irq_restore(flags);
- preempt_enable();
-
- /* disable bus ratio bit */
- rdmsrl(MSR_VIA_LONGHAUL, longhaul->val);
- longhaul->bits.EnableSoftBusRatio = 0;
- longhaul->bits.RevisionKey = version;
- wrmsrl(MSR_VIA_LONGHAUL, longhaul->val);
+ longhaul.bits.RevisionKey = longhaul.bits.RevisionID;
+ longhaul.bits.EnableSoftBusRatio = 0;
+ longhaul.bits.EnableSoftBSEL = 0;
+ longhaul.bits.EnableSoftVID = 0;
+ wrmsrl(MSR_VIA_LONGHAUL, longhaul.val);
}
/**
@@ -209,9 +194,9 @@ static void longhaul_setstate(unsigned int clock_ratio_index)
{
int speed, mult;
struct cpufreq_freqs freqs;
- union msr_longhaul longhaul;
- union msr_bcr2 bcr2;
static unsigned int old_ratio=-1;
+ unsigned long flags;
+ unsigned int pic1_mask, pic2_mask;
if (old_ratio == clock_ratio_index)
return;
@@ -234,6 +219,20 @@ static void longhaul_setstate(unsigned int clock_ratio_index)
dprintk ("Setting to FSB:%dMHz Mult:%d.%dx (%s)\n",
fsb, mult/10, mult%10, print_speed(speed/1000));
+ preempt_disable();
+ local_irq_save(flags);
+
+ pic2_mask = inb(0xA1);
+ pic1_mask = inb(0x21); /* works on C3. save mask. */
+ outb(0xFF,0xA1); /* Overkill */
+ outb(0xFE,0x21); /* TMR0 only */
+
+ /* Disable bus master arbitration */
+ if (pr->flags.bm_check) {
+ acpi_set_register(ACPI_BITREG_ARB_DISABLE, 1,
+ ACPI_MTX_DO_NOT_LOCK);
+ }
+
switch (longhaul_version) {
/*
@@ -245,20 +244,7 @@ static void longhaul_setstate(unsigned int clock_ratio_index)
*/
case TYPE_LONGHAUL_V1:
case TYPE_LONGHAUL_V2:
- rdmsrl (MSR_VIA_BCR2, bcr2.val);
- /* Enable software clock multiplier */
- bcr2.bits.ESOFTBF = 1;
- bcr2.bits.CLOCKMUL = clock_ratio_index;
- local_irq_disable();
- wrmsrl (MSR_VIA_BCR2, bcr2.val);
- safe_halt();
-
- /* Disable software clock multiplier */
- rdmsrl (MSR_VIA_BCR2, bcr2.val);
- bcr2.bits.ESOFTBF = 0;
- local_irq_disable();
- wrmsrl (MSR_VIA_BCR2, bcr2.val);
- local_irq_enable();
+ do_longhaul1(cx->address, clock_ratio_index);
break;
/*
@@ -273,10 +259,22 @@ static void longhaul_setstate(unsigned int clock_ratio_index)
* to work in practice.
*/
case TYPE_POWERSAVER:
- do_powersaver(&longhaul, clock_ratio_index);
+ do_powersaver(cx->address, clock_ratio_index);
break;
}
+ /* Enable bus master arbitration */
+ if (pr->flags.bm_check) {
+ acpi_set_register(ACPI_BITREG_ARB_DISABLE, 0,
+ ACPI_MTX_DO_NOT_LOCK);
+ }
+
+ outb(pic2_mask,0xA1); /* restore mask */
+ outb(pic1_mask,0x21);
+
+ local_irq_restore(flags);
+ preempt_enable();
+
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
}
@@ -324,9 +322,11 @@ static int guess_fsb(void)
static int __init longhaul_get_ranges(void)
{
unsigned long invalue;
- unsigned int multipliers[32]= {
- 50,30,40,100,55,35,45,95,90,70,80,60,120,75,85,65,
- -1,110,120,-1,135,115,125,105,130,150,160,140,-1,155,-1,145 };
+ unsigned int ezra_t_multipliers[32]= {
+ 90, 30, 40, 100, 55, 35, 45, 95,
+ 50, 70, 80, 60, 120, 75, 85, 65,
+ -1, 110, 120, -1, 135, 115, 125, 105,
+ 130, 150, 160, 140, -1, 155, -1, 145 };
unsigned int j, k = 0;
union msr_longhaul longhaul;
unsigned long lo, hi;
@@ -355,13 +355,13 @@ static int __init longhaul_get_ranges(void)
invalue = longhaul.bits.MaxMHzBR;
if (longhaul.bits.MaxMHzBR4)
invalue += 16;
- maxmult=multipliers[invalue];
+ maxmult=ezra_t_multipliers[invalue];
invalue = longhaul.bits.MinMHzBR;
if (longhaul.bits.MinMHzBR4 == 1)
minmult = 30;
else
- minmult = multipliers[invalue];
+ minmult = ezra_t_multipliers[invalue];
fsb = eblcr_fsb_table_v2[longhaul.bits.MaxMHzFSB];
break;
}
@@ -527,6 +527,18 @@ static unsigned int longhaul_get(unsigned int cpu)
return calc_speed(longhaul_get_cpu_mult());
}
+static acpi_status longhaul_walk_callback(acpi_handle obj_handle,
+ u32 nesting_level,
+ void *context, void **return_value)
+{
+ struct acpi_device *d;
+
+ if ( acpi_bus_get_device(obj_handle, &d) ) {
+ return 0;
+ }
+ *return_value = (void *)acpi_driver_data(d);
+ return 1;
+}
static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
{
@@ -534,6 +546,15 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
char *cpuname=NULL;
int ret;
+ /* Check ACPI support for C3 state */
+ acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
+ &longhaul_walk_callback, NULL, (void *)&pr);
+ if (pr == NULL) goto err_acpi;
+
+ cx = &pr->power.states[ACPI_STATE_C3];
+ if (cx->address == 0 || cx->latency > 1000) goto err_acpi;
+
+ /* Now check what we have on this motherboard */
switch (c->x86_model) {
case 6:
cpu_model = CPU_SAMUEL;
@@ -634,6 +655,10 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
cpufreq_frequency_table_get_attr(longhaul_table, policy->cpu);
return 0;
+
+err_acpi:
+ printk(KERN_ERR PFX "No ACPI support for CPU frequency changes.\n");
+ return -ENODEV;
}
static int __devexit longhaul_cpu_exit(struct cpufreq_policy *policy)
@@ -666,6 +691,18 @@ static int __init longhaul_init(void)
if (c->x86_vendor != X86_VENDOR_CENTAUR || c->x86 != 6)
return -ENODEV;
+#ifdef CONFIG_SMP
+ if (num_online_cpus() > 1) {
+ return -ENODEV;
+ printk(KERN_ERR PFX "More than 1 CPU detected, longhaul disabled.\n");
+ }
+#endif
+#ifdef CONFIG_X86_IO_APIC
+ if (cpu_has_apic) {
+ printk(KERN_ERR PFX "APIC detected. Longhaul is currently broken in this configuration.\n");
+ return -ENODEV;
+ }
+#endif
switch (c->x86_model) {
case 6 ... 9:
return cpufreq_register_driver(&longhaul_driver);
@@ -699,6 +736,6 @@ MODULE_AUTHOR ("Dave Jones <davej@codemonkey.org.uk>");
MODULE_DESCRIPTION ("Longhaul driver for VIA Cyrix processors.");
MODULE_LICENSE ("GPL");
-module_init(longhaul_init);
+late_initcall(longhaul_init);
module_exit(longhaul_exit);
diff --git a/arch/i386/kernel/cpu/intel_cacheinfo.c b/arch/i386/kernel/cpu/intel_cacheinfo.c
index e9f0b928b0a..5c43be47587 100644
--- a/arch/i386/kernel/cpu/intel_cacheinfo.c
+++ b/arch/i386/kernel/cpu/intel_cacheinfo.c
@@ -759,7 +759,7 @@ static int __cpuinit cache_sysfs_init(void)
if (num_cache_leaves == 0)
return 0;
- register_cpu_notifier(&cacheinfo_cpu_notifier);
+ register_hotcpu_notifier(&cacheinfo_cpu_notifier);
for_each_online_cpu(i) {
cacheinfo_cpu_callback(&cacheinfo_cpu_notifier, CPU_ONLINE,
diff --git a/arch/i386/kernel/cpu/mcheck/mce.h b/arch/i386/kernel/cpu/mcheck/mce.h
index dc2416dfef1..84fd4cf7d0f 100644
--- a/arch/i386/kernel/cpu/mcheck/mce.h
+++ b/arch/i386/kernel/cpu/mcheck/mce.h
@@ -9,6 +9,6 @@ void winchip_mcheck_init(struct cpuinfo_x86 *c);
/* Call the installed machine check handler for this CPU setup. */
extern fastcall void (*machine_check_vector)(struct pt_regs *, long error_code);
-extern int mce_disabled __initdata;
+extern int mce_disabled;
extern int nr_mce_banks;
diff --git a/arch/i386/kernel/crash.c b/arch/i386/kernel/crash.c
index 48f0f62f781..5b96f038367 100644
--- a/arch/i386/kernel/crash.c
+++ b/arch/i386/kernel/crash.c
@@ -90,7 +90,7 @@ static void crash_save_self(struct pt_regs *regs)
crash_save_this_cpu(regs, cpu);
}
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)
static atomic_t waiting_for_crash_ipi;
static int crash_nmi_callback(struct pt_regs *regs, int cpu)
diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S
index d9a260f2efb..37a7d2eaf4a 100644
--- a/arch/i386/kernel/entry.S
+++ b/arch/i386/kernel/entry.S
@@ -204,7 +204,7 @@ VM_MASK = 0x00020000
ENTRY(ret_from_fork)
CFI_STARTPROC
pushl %eax
- CFI_ADJUST_CFA_OFFSET -4
+ CFI_ADJUST_CFA_OFFSET 4
call schedule_tail
GET_THREAD_INFO(%ebp)
popl %eax
diff --git a/arch/i386/kernel/ioport.c b/arch/i386/kernel/ioport.c
index 79026f026b8..498e8bc197d 100644
--- a/arch/i386/kernel/ioport.c
+++ b/arch/i386/kernel/ioport.c
@@ -79,6 +79,7 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
memset(bitmap, 0xff, IO_BITMAP_BYTES);
t->io_bitmap_ptr = bitmap;
+ set_thread_flag(TIF_IO_BITMAP);
}
/*
diff --git a/arch/i386/kernel/kprobes.c b/arch/i386/kernel/kprobes.c
index de2e16e561c..afe6505ca0b 100644
--- a/arch/i386/kernel/kprobes.c
+++ b/arch/i386/kernel/kprobes.c
@@ -256,11 +256,6 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
int ret = 0;
kprobe_opcode_t *addr;
struct kprobe_ctlblk *kcb;
-#ifdef CONFIG_PREEMPT
- unsigned pre_preempt_count = preempt_count();
-#else
- unsigned pre_preempt_count = 1;
-#endif
addr = (kprobe_opcode_t *)(regs->eip - sizeof(kprobe_opcode_t));
@@ -338,13 +333,15 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
return 1;
ss_probe:
- if (pre_preempt_count && p->ainsn.boostable == 1 && !p->post_handler){
+#ifndef CONFIG_PREEMPT
+ if (p->ainsn.boostable == 1 && !p->post_handler){
/* Boost up -- we can execute copied instructions directly */
reset_current_kprobe();
regs->eip = (unsigned long)p->ainsn.insn;
preempt_enable_no_resched();
return 1;
}
+#endif
prepare_singlestep(p, regs);
kcb->kprobe_status = KPROBE_HIT_SS;
return 1;
diff --git a/arch/i386/kernel/machine_kexec.c b/arch/i386/kernel/machine_kexec.c
index 511abe52a94..6b1ae6ba76f 100644
--- a/arch/i386/kernel/machine_kexec.c
+++ b/arch/i386/kernel/machine_kexec.c
@@ -189,14 +189,11 @@ NORET_TYPE void machine_kexec(struct kimage *image)
memcpy((void *)reboot_code_buffer, relocate_new_kernel,
relocate_new_kernel_size);
- /* The segment registers are funny things, they are
- * automatically loaded from a table, in memory wherever you
- * set them to a specific selector, but this table is never
- * accessed again you set the segment to a different selector.
- *
- * The more common model is are caches where the behide
- * the scenes work is done, but is also dropped at arbitrary
- * times.
+ /* The segment registers are funny things, they have both a
+ * visible and an invisible part. Whenever the visible part is
+ * set to a specific selector, the invisible part is loaded
+ * with from a table in memory. At no other time is the
+ * descriptor table in memory accessed.
*
* I take advantage of this here by force loading the
* segments, before I zap the gdt with an invalid value.
diff --git a/arch/i386/kernel/nmi.c b/arch/i386/kernel/nmi.c
index 2dd928a8464..acb351478e4 100644
--- a/arch/i386/kernel/nmi.c
+++ b/arch/i386/kernel/nmi.c
@@ -575,6 +575,7 @@ void touch_nmi_watchdog (void)
*/
touch_softlockup_watchdog();
}
+EXPORT_SYMBOL(touch_nmi_watchdog);
extern void die_nmi(struct pt_regs *, const char *msg);
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c
index 94e2c87edea..8657c739656 100644
--- a/arch/i386/kernel/process.c
+++ b/arch/i386/kernel/process.c
@@ -359,16 +359,16 @@ EXPORT_SYMBOL(kernel_thread);
*/
void exit_thread(void)
{
- struct task_struct *tsk = current;
- struct thread_struct *t = &tsk->thread;
-
/* The process may have allocated an io port bitmap... nuke it. */
- if (unlikely(NULL != t->io_bitmap_ptr)) {
+ if (unlikely(test_thread_flag(TIF_IO_BITMAP))) {
+ struct task_struct *tsk = current;
+ struct thread_struct *t = &tsk->thread;
int cpu = get_cpu();
struct tss_struct *tss = &per_cpu(init_tss, cpu);
kfree(t->io_bitmap_ptr);
t->io_bitmap_ptr = NULL;
+ clear_thread_flag(TIF_IO_BITMAP);
/*
* Careful, clear this in the TSS too:
*/
@@ -387,6 +387,7 @@ void flush_thread(void)
memset(tsk->thread.debugreg, 0, sizeof(unsigned long)*8);
memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
+ clear_tsk_thread_flag(tsk, TIF_DEBUG);
/*
* Forget coprocessor state..
*/
@@ -431,7 +432,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
savesegment(gs,p->thread.gs);
tsk = current;
- if (unlikely(NULL != tsk->thread.io_bitmap_ptr)) {
+ if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {
p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
if (!p->thread.io_bitmap_ptr) {
p->thread.io_bitmap_max = 0;
@@ -439,6 +440,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
}
memcpy(p->thread.io_bitmap_ptr, tsk->thread.io_bitmap_ptr,
IO_BITMAP_BYTES);
+ set_tsk_thread_flag(p, TIF_IO_BITMAP);
}
/*
@@ -533,10 +535,24 @@ int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
return 1;
}
-static inline void
-handle_io_bitmap(struct thread_struct *next, struct tss_struct *tss)
+static noinline void __switch_to_xtra(struct task_struct *next_p,
+ struct tss_struct *tss)
{
- if (!next->io_bitmap_ptr) {
+ struct thread_struct *next;
+
+ next = &next_p->thread;
+
+ if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
+ set_debugreg(next->debugreg[0], 0);
+ set_debugreg(next->debugreg[1], 1);
+ set_debugreg(next->debugreg[2], 2);
+ set_debugreg(next->debugreg[3], 3);
+ /* no 4 and 5 */
+ set_debugreg(next->debugreg[6], 6);
+ set_debugreg(next->debugreg[7], 7);
+ }
+
+ if (!test_tsk_thread_flag(next_p, TIF_IO_BITMAP)) {
/*
* Disable the bitmap via an invalid offset. We still cache
* the previous bitmap owner and the IO bitmap contents:
@@ -544,6 +560,7 @@ handle_io_bitmap(struct thread_struct *next, struct tss_struct *tss)
tss->io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
return;
}
+
if (likely(next == tss->io_bitmap_owner)) {
/*
* Previous owner of the bitmap (hence the bitmap content)
@@ -671,20 +688,11 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas
set_iopl_mask(next->iopl);
/*
- * Now maybe reload the debug registers
+ * Now maybe handle debug registers and/or IO bitmaps
*/
- if (unlikely(next->debugreg[7])) {
- set_debugreg(next->debugreg[0], 0);
- set_debugreg(next->debugreg[1], 1);
- set_debugreg(next->debugreg[2], 2);
- set_debugreg(next->debugreg[3], 3);
- /* no 4 and 5 */
- set_debugreg(next->debugreg[6], 6);
- set_debugreg(next->debugreg[7], 7);
- }
-
- if (unlikely(prev->io_bitmap_ptr || next->io_bitmap_ptr))
- handle_io_bitmap(next, tss);
+ if (unlikely((task_thread_info(next_p)->flags & _TIF_WORK_CTXSW)
+ || test_tsk_thread_flag(prev_p, TIF_IO_BITMAP)))
+ __switch_to_xtra(next_p, tss);
disable_tsc(prev_p, next_p);
diff --git a/arch/i386/kernel/ptrace.c b/arch/i386/kernel/ptrace.c
index fd7eaf7866e..d3db03f4085 100644
--- a/arch/i386/kernel/ptrace.c
+++ b/arch/i386/kernel/ptrace.c
@@ -468,8 +468,11 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
for(i=0; i<4; i++)
if ((0x5f54 >> ((data >> (16 + 4*i)) & 0xf)) & 1)
goto out_tsk;
+ if (data)
+ set_tsk_thread_flag(child, TIF_DEBUG);
+ else
+ clear_tsk_thread_flag(child, TIF_DEBUG);
}
-
addr -= (long) &dummy->u_debugreg;
addr = addr >> 2;
child->thread.debugreg[addr] = data;
diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index 08c00d20f16..f1682206d30 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -26,7 +26,7 @@
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
-#include <linux/tty.h>
+#include <linux/screen_info.h>
#include <linux/ioport.h>
#include <linux/acpi.h>
#include <linux/apm_bios.h>
@@ -1327,7 +1327,10 @@ legacy_init_iomem_resources(struct resource *code_resource, struct resource *dat
res->start = e820.map[i].addr;
res->end = res->start + e820.map[i].size - 1;
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
- request_resource(&iomem_resource, res);
+ if (request_resource(&iomem_resource, res)) {
+ kfree(res);
+ continue;
+ }
if (e820.map[i].type == E820_RAM) {
/*
* We don't know which RAM region contains kernel data,
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 6f5fea05f1d..f948419c888 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -212,14 +212,20 @@ valid_k7:
* then we print a warning if not, and always resync.
*/
-static atomic_t tsc_start_flag = ATOMIC_INIT(0);
-static atomic_t tsc_count_start = ATOMIC_INIT(0);
-static atomic_t tsc_count_stop = ATOMIC_INIT(0);
-static unsigned long long tsc_values[NR_CPUS];
+static struct {
+ atomic_t start_flag;
+ atomic_t count_start;
+ atomic_t count_stop;
+ unsigned long long values[NR_CPUS];
+} tsc __initdata = {
+ .start_flag = ATOMIC_INIT(0),
+ .count_start = ATOMIC_INIT(0),
+ .count_stop = ATOMIC_INIT(0),
+};
#define NR_LOOPS 5
-static void __init synchronize_tsc_bp (void)
+static void __init synchronize_tsc_bp(void)
{
int i;
unsigned long long t0;
@@ -233,7 +239,7 @@ static void __init synchronize_tsc_bp (void)
/* convert from kcyc/sec to cyc/usec */
one_usec = cpu_khz / 1000;
- atomic_set(&tsc_start_flag, 1);
+ atomic_set(&tsc.start_flag, 1);
wmb();
/*
@@ -250,16 +256,16 @@ static void __init synchronize_tsc_bp (void)
/*
* all APs synchronize but they loop on '== num_cpus'
*/
- while (atomic_read(&tsc_count_start) != num_booting_cpus()-1)
+ while (atomic_read(&tsc.count_start) != num_booting_cpus()-1)
cpu_relax();
- atomic_set(&tsc_count_stop, 0);
+ atomic_set(&tsc.count_stop, 0);
wmb();
/*
* this lets the APs save their current TSC:
*/
- atomic_inc(&tsc_count_start);
+ atomic_inc(&tsc.count_start);
- rdtscll(tsc_values[smp_processor_id()]);
+ rdtscll(tsc.values[smp_processor_id()]);
/*
* We clear the TSC in the last loop:
*/
@@ -269,56 +275,54 @@ static void __init synchronize_tsc_bp (void)
/*
* Wait for all APs to leave the synchronization point:
*/
- while (atomic_read(&tsc_count_stop) != num_booting_cpus()-1)
+ while (atomic_read(&tsc.count_stop) != num_booting_cpus()-1)
cpu_relax();
- atomic_set(&tsc_count_start, 0);
+ atomic_set(&tsc.count_start, 0);
wmb();
- atomic_inc(&tsc_count_stop);
+ atomic_inc(&tsc.count_stop);
}
sum = 0;
for (i = 0; i < NR_CPUS; i++) {
if (cpu_isset(i, cpu_callout_map)) {
- t0 = tsc_values[i];
+ t0 = tsc.values[i];
sum += t0;
}
}
avg = sum;
do_div(avg, num_booting_cpus());
- sum = 0;
for (i = 0; i < NR_CPUS; i++) {
if (!cpu_isset(i, cpu_callout_map))
continue;
- delta = tsc_values[i] - avg;
+ delta = tsc.values[i] - avg;
if (delta < 0)
delta = -delta;
/*
* We report bigger than 2 microseconds clock differences.
*/
if (delta > 2*one_usec) {
- long realdelta;
+ long long realdelta;
+
if (!buggy) {
buggy = 1;
printk("\n");
}
realdelta = delta;
do_div(realdelta, one_usec);
- if (tsc_values[i] < avg)
+ if (tsc.values[i] < avg)
realdelta = -realdelta;
- if (realdelta > 0)
- printk(KERN_INFO "CPU#%d had %ld usecs TSC "
+ if (realdelta)
+ printk(KERN_INFO "CPU#%d had %Ld usecs TSC "
"skew, fixed it up.\n", i, realdelta);
}
-
- sum += delta;
}
if (!buggy)
printk("passed.\n");
}
-static void __init synchronize_tsc_ap (void)
+static void __init synchronize_tsc_ap(void)
{
int i;
@@ -327,20 +331,20 @@ static void __init synchronize_tsc_ap (void)
* this gets called, so we first wait for the BP to
* finish SMP initialization:
*/
- while (!atomic_read(&tsc_start_flag))
+ while (!atomic_read(&tsc.start_flag))
cpu_relax();
for (i = 0; i < NR_LOOPS; i++) {
- atomic_inc(&tsc_count_start);
- while (atomic_read(&tsc_count_start) != num_booting_cpus())
+ atomic_inc(&tsc.count_start);
+ while (atomic_read(&tsc.count_start) != num_booting_cpus())
cpu_relax();
- rdtscll(tsc_values[smp_processor_id()]);
+ rdtscll(tsc.values[smp_processor_id()]);
if (i == NR_LOOPS-1)
write_tsc(0, 0);
- atomic_inc(&tsc_count_stop);
- while (atomic_read(&tsc_count_stop) != num_booting_cpus())
+ atomic_inc(&tsc.count_stop);
+ while (atomic_read(&tsc.count_stop) != num_booting_cpus())
cpu_relax();
}
}
diff --git a/arch/i386/kernel/time.c b/arch/i386/kernel/time.c
index 316421a7f56..edd00f6cee3 100644
--- a/arch/i386/kernel/time.c
+++ b/arch/i386/kernel/time.c
@@ -135,7 +135,7 @@ unsigned long profile_pc(struct pt_regs *regs)
{
unsigned long pc = instruction_pointer(regs);
- if (in_lock_functions(pc))
+ if (!user_mode_vm(regs) && in_lock_functions(pc))
return *(unsigned long *)(regs->ebp + 4);
return pc;
@@ -206,15 +206,16 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
unsigned long get_cmos_time(void)
{
unsigned long retval;
+ unsigned long flags;
- spin_lock(&rtc_lock);
+ spin_lock_irqsave(&rtc_lock, flags);
if (efi_enabled)
retval = efi_get_time();
else
retval = mach_get_cmos_time();
- spin_unlock(&rtc_lock);
+ spin_unlock_irqrestore(&rtc_lock, flags);
return retval;
}
diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index 2bf8b55b91f..82e0fd02af1 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -100,13 +100,13 @@ int register_die_notifier(struct notifier_block *nb)
vmalloc_sync_all();
return atomic_notifier_chain_register(&i386die_chain, nb);
}
-EXPORT_SYMBOL(register_die_notifier);
+EXPORT_SYMBOL(register_die_notifier); /* used modular by kdb */
int unregister_die_notifier(struct notifier_block *nb)
{
return atomic_notifier_chain_unregister(&i386die_chain, nb);
}
-EXPORT_SYMBOL(unregister_die_notifier);
+EXPORT_SYMBOL(unregister_die_notifier); /* used modular by kdb */
static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
{
@@ -187,10 +187,21 @@ static void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
if (unwind_init_blocked(&info, task) == 0)
unw_ret = show_trace_unwind(&info, log_lvl);
}
- if (unw_ret > 0) {
- if (call_trace > 0)
+ if (unw_ret > 0 && !arch_unw_user_mode(&info)) {
+#ifdef CONFIG_STACK_UNWIND
+ print_symbol("DWARF2 unwinder stuck at %s\n",
+ UNW_PC(&info));
+ if (call_trace == 1) {
+ printk("Leftover inexact backtrace:\n");
+ if (UNW_SP(&info))
+ stack = (void *)UNW_SP(&info);
+ } else if (call_trace > 1)
return;
- printk("%sLegacy call trace:\n", log_lvl);
+ else
+ printk("Full inexact backtrace again:\n");
+#else
+ printk("Inexact backtrace:\n");
+#endif
}
}
@@ -324,35 +335,35 @@ void show_registers(struct pt_regs *regs)
static void handle_BUG(struct pt_regs *regs)
{
+ unsigned long eip = regs->eip;
unsigned short ud2;
- unsigned short line;
- char *file;
- char c;
- unsigned long eip;
-
- eip = regs->eip;
if (eip < PAGE_OFFSET)
- goto no_bug;
+ return;
if (__get_user(ud2, (unsigned short __user *)eip))
- goto no_bug;
+ return;
if (ud2 != 0x0b0f)
- goto no_bug;
- if (__get_user(line, (unsigned short __user *)(eip + 2)))
- goto bug;
- if (__get_user(file, (char * __user *)(eip + 4)) ||
- (unsigned long)file < PAGE_OFFSET || __get_user(c, file))
- file = "<bad filename>";
+ return;
printk(KERN_EMERG "------------[ cut here ]------------\n");
- printk(KERN_EMERG "kernel BUG at %s:%d!\n", file, line);
-no_bug:
- return;
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+ do {
+ unsigned short line;
+ char *file;
+ char c;
+
+ if (__get_user(line, (unsigned short __user *)(eip + 2)))
+ break;
+ if (__get_user(file, (char * __user *)(eip + 4)) ||
+ (unsigned long)file < PAGE_OFFSET || __get_user(c, file))
+ file = "<bad filename>";
- /* Here we know it was a BUG but file-n-line is unavailable */
-bug:
- printk(KERN_EMERG "Kernel BUG\n");
+ printk(KERN_EMERG "kernel BUG at %s:%d!\n", file, line);
+ return;
+ } while (0);
+#endif
+ printk(KERN_EMERG "Kernel BUG at [verbose debug info unavailable]\n");
}
/* This is gone through when something in the kernel
@@ -442,11 +453,9 @@ void die(const char * str, struct pt_regs * regs, long err)
if (in_interrupt())
panic("Fatal exception in interrupt");
- if (panic_on_oops) {
- printk(KERN_EMERG "Fatal exception: panic in 5 seconds\n");
- ssleep(5);
+ if (panic_on_oops)
panic("Fatal exception");
- }
+
oops_exit();
do_exit(SIGSEGV);
}
@@ -1238,8 +1247,10 @@ static int __init call_trace_setup(char *s)
call_trace = -1;
else if (strcmp(s, "both") == 0)
call_trace = 0;
- else if (strcmp(s, "new") == 0)
+ else if (strcmp(s, "newfallback") == 0)
call_trace = 1;
+ else if (strcmp(s, "new") == 2)
+ call_trace = 2;
return 1;
}
__setup("call_trace=", call_trace_setup);
diff --git a/arch/i386/kernel/vsyscall.lds.S b/arch/i386/kernel/vsyscall.lds.S
index e26975fc68b..f66cd11adb7 100644
--- a/arch/i386/kernel/vsyscall.lds.S
+++ b/arch/i386/kernel/vsyscall.lds.S
@@ -10,6 +10,7 @@ SECTIONS
. = VDSO_PRELINK + SIZEOF_HEADERS;
.hash : { *(.hash) } :text
+ .gnu.hash : { *(.gnu.hash) }
.dynsym : { *(.dynsym) }
.dynstr : { *(.dynstr) }
.gnu.version : { *(.gnu.version) }
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 05:24:25 +0000