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authorIngo Molnar <mingo@elte.hu>2008-12-23 16:24:15 +0100
committerIngo Molnar <mingo@elte.hu>2008-12-23 16:24:15 +0100
commitbf8bd66d0580f296f257d371ee41a0a137b541c7 (patch)
tree4c7f7471005b4436d40ba52edd51214d12331f25 /arch/x86/kernel
parent8ae936690972dfcad73d0dde1095b9f32af5ee95 (diff)
parent1ccedb7cdba6886939dd8b4c8f965a826f696e56 (diff)
Merge branch 'x86/apic' into x86/irq
Conflicts: arch/x86/kernel/apic.c
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/apic.c121
-rw-r--r--arch/x86/kernel/nmi.c43
-rw-r--r--arch/x86/kernel/setup.c12
-rw-r--r--arch/x86/kernel/smpboot.c2
-rw-r--r--arch/x86/kernel/vmi_32.c16
5 files changed, 106 insertions, 88 deletions
diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index 1771dd74681..47cbaa237b7 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -441,6 +441,7 @@ static void lapic_timer_setup(enum clock_event_mode mode,
v = apic_read(APIC_LVTT);
v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
apic_write(APIC_LVTT, v);
+ apic_write(APIC_TMICT, 0xffffffff);
break;
case CLOCK_EVT_MODE_RESUME:
/* Nothing to do here */
@@ -559,13 +560,13 @@ static int __init calibrate_by_pmtimer(long deltapm, long *delta)
} else {
res = (((u64)deltapm) * mult) >> 22;
do_div(res, 1000000);
- printk(KERN_WARNING "APIC calibration not consistent "
+ pr_warning("APIC calibration not consistent "
"with PM Timer: %ldms instead of 100ms\n",
(long)res);
/* Correct the lapic counter value */
res = (((u64)(*delta)) * pm_100ms);
do_div(res, deltapm);
- printk(KERN_INFO "APIC delta adjusted to PM-Timer: "
+ pr_info("APIC delta adjusted to PM-Timer: "
"%lu (%ld)\n", (unsigned long)res, *delta);
*delta = (long)res;
}
@@ -645,8 +646,7 @@ static int __init calibrate_APIC_clock(void)
*/
if (calibration_result < (1000000 / HZ)) {
local_irq_enable();
- printk(KERN_WARNING
- "APIC frequency too slow, disabling apic timer\n");
+ pr_warning("APIC frequency too slow, disabling apic timer\n");
return -1;
}
@@ -672,13 +672,9 @@ static int __init calibrate_APIC_clock(void)
while (lapic_cal_loops <= LAPIC_CAL_LOOPS)
cpu_relax();
- local_irq_disable();
-
/* Stop the lapic timer */
lapic_timer_setup(CLOCK_EVT_MODE_SHUTDOWN, levt);
- local_irq_enable();
-
/* Jiffies delta */
deltaj = lapic_cal_j2 - lapic_cal_j1;
apic_printk(APIC_VERBOSE, "... jiffies delta = %lu\n", deltaj);
@@ -692,8 +688,7 @@ static int __init calibrate_APIC_clock(void)
local_irq_enable();
if (levt->features & CLOCK_EVT_FEAT_DUMMY) {
- printk(KERN_WARNING
- "APIC timer disabled due to verification failure.\n");
+ pr_warning("APIC timer disabled due to verification failure.\n");
return -1;
}
@@ -714,7 +709,7 @@ void __init setup_boot_APIC_clock(void)
* broadcast mechanism is used. On UP systems simply ignore it.
*/
if (disable_apic_timer) {
- printk(KERN_INFO "Disabling APIC timer\n");
+ pr_info("Disabling APIC timer\n");
/* No broadcast on UP ! */
if (num_possible_cpus() > 1) {
lapic_clockevent.mult = 1;
@@ -741,7 +736,7 @@ void __init setup_boot_APIC_clock(void)
if (nmi_watchdog != NMI_IO_APIC)
lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY;
else
- printk(KERN_WARNING "APIC timer registered as dummy,"
+ pr_warning("APIC timer registered as dummy,"
" due to nmi_watchdog=%d!\n", nmi_watchdog);
/* Setup the lapic or request the broadcast */
@@ -773,8 +768,7 @@ static void local_apic_timer_interrupt(void)
* spurious.
*/
if (!evt->event_handler) {
- printk(KERN_WARNING
- "Spurious LAPIC timer interrupt on cpu %d\n", cpu);
+ pr_warning("Spurious LAPIC timer interrupt on cpu %d\n", cpu);
/* Switch it off */
lapic_timer_setup(CLOCK_EVT_MODE_SHUTDOWN, evt);
return;
@@ -1089,7 +1083,7 @@ static void __cpuinit lapic_setup_esr(void)
unsigned int oldvalue, value, maxlvt;
if (!lapic_is_integrated()) {
- printk(KERN_INFO "No ESR for 82489DX.\n");
+ pr_info("No ESR for 82489DX.\n");
return;
}
@@ -1100,7 +1094,7 @@ static void __cpuinit lapic_setup_esr(void)
* ESR disabled - we can't do anything useful with the
* errors anyway - mbligh
*/
- printk(KERN_INFO "Leaving ESR disabled.\n");
+ pr_info("Leaving ESR disabled.\n");
return;
}
@@ -1294,7 +1288,7 @@ void check_x2apic(void)
rdmsr(MSR_IA32_APICBASE, msr, msr2);
if (msr & X2APIC_ENABLE) {
- printk("x2apic enabled by BIOS, switching to x2apic ops\n");
+ pr_info("x2apic enabled by BIOS, switching to x2apic ops\n");
x2apic_preenabled = x2apic = 1;
apic_ops = &x2apic_ops;
}
@@ -1306,7 +1300,7 @@ void enable_x2apic(void)
rdmsr(MSR_IA32_APICBASE, msr, msr2);
if (!(msr & X2APIC_ENABLE)) {
- printk("Enabling x2apic\n");
+ pr_info("Enabling x2apic\n");
wrmsr(MSR_IA32_APICBASE, msr | X2APIC_ENABLE, 0);
}
}
@@ -1321,9 +1315,8 @@ void __init enable_IR_x2apic(void)
return;
if (!x2apic_preenabled && disable_x2apic) {
- printk(KERN_INFO
- "Skipped enabling x2apic and Interrupt-remapping "
- "because of nox2apic\n");
+ pr_info("Skipped enabling x2apic and Interrupt-remapping "
+ "because of nox2apic\n");
return;
}
@@ -1331,22 +1324,19 @@ void __init enable_IR_x2apic(void)
panic("Bios already enabled x2apic, can't enforce nox2apic");
if (!x2apic_preenabled && skip_ioapic_setup) {
- printk(KERN_INFO
- "Skipped enabling x2apic and Interrupt-remapping "
- "because of skipping io-apic setup\n");
+ pr_info("Skipped enabling x2apic and Interrupt-remapping "
+ "because of skipping io-apic setup\n");
return;
}
ret = dmar_table_init();
if (ret) {
- printk(KERN_INFO
- "dmar_table_init() failed with %d:\n", ret);
+ pr_info("dmar_table_init() failed with %d:\n", ret);
if (x2apic_preenabled)
panic("x2apic enabled by bios. But IR enabling failed");
else
- printk(KERN_INFO
- "Not enabling x2apic,Intr-remapping\n");
+ pr_info("Not enabling x2apic,Intr-remapping\n");
return;
}
@@ -1355,7 +1345,7 @@ void __init enable_IR_x2apic(void)
ret = save_mask_IO_APIC_setup();
if (ret) {
- printk(KERN_INFO "Saving IO-APIC state failed: %d\n", ret);
+ pr_info("Saving IO-APIC state failed: %d\n", ret);
goto end;
}
@@ -1390,14 +1380,11 @@ end:
if (!ret) {
if (!x2apic_preenabled)
- printk(KERN_INFO
- "Enabled x2apic and interrupt-remapping\n");
+ pr_info("Enabled x2apic and interrupt-remapping\n");
else
- printk(KERN_INFO
- "Enabled Interrupt-remapping\n");
+ pr_info("Enabled Interrupt-remapping\n");
} else
- printk(KERN_ERR
- "Failed to enable Interrupt-remapping and x2apic\n");
+ pr_err("Failed to enable Interrupt-remapping and x2apic\n");
#else
if (!cpu_has_x2apic)
return;
@@ -1406,8 +1393,8 @@ end:
panic("x2apic enabled prior OS handover,"
" enable CONFIG_INTR_REMAP");
- printk(KERN_INFO "Enable CONFIG_INTR_REMAP for enabling intr-remapping "
- " and x2apic\n");
+ pr_info("Enable CONFIG_INTR_REMAP for enabling intr-remapping "
+ " and x2apic\n");
#endif
return;
@@ -1424,7 +1411,7 @@ end:
static int __init detect_init_APIC(void)
{
if (!cpu_has_apic) {
- printk(KERN_INFO "No local APIC present\n");
+ pr_info("No local APIC present\n");
return -1;
}
@@ -1465,8 +1452,8 @@ static int __init detect_init_APIC(void)
* "lapic" specified.
*/
if (!force_enable_local_apic) {
- printk(KERN_INFO "Local APIC disabled by BIOS -- "
- "you can enable it with \"lapic\"\n");
+ pr_info("Local APIC disabled by BIOS -- "
+ "you can enable it with \"lapic\"\n");
return -1;
}
/*
@@ -1476,8 +1463,7 @@ static int __init detect_init_APIC(void)
*/
rdmsr(MSR_IA32_APICBASE, l, h);
if (!(l & MSR_IA32_APICBASE_ENABLE)) {
- printk(KERN_INFO
- "Local APIC disabled by BIOS -- reenabling.\n");
+ pr_info("Local APIC disabled by BIOS -- reenabling.\n");
l &= ~MSR_IA32_APICBASE_BASE;
l |= MSR_IA32_APICBASE_ENABLE | APIC_DEFAULT_PHYS_BASE;
wrmsr(MSR_IA32_APICBASE, l, h);
@@ -1490,7 +1476,7 @@ static int __init detect_init_APIC(void)
*/
features = cpuid_edx(1);
if (!(features & (1 << X86_FEATURE_APIC))) {
- printk(KERN_WARNING "Could not enable APIC!\n");
+ pr_warning("Could not enable APIC!\n");
return -1;
}
set_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
@@ -1501,14 +1487,14 @@ static int __init detect_init_APIC(void)
if (l & MSR_IA32_APICBASE_ENABLE)
mp_lapic_addr = l & MSR_IA32_APICBASE_BASE;
- printk(KERN_INFO "Found and enabled local APIC!\n");
+ pr_info("Found and enabled local APIC!\n");
apic_pm_activate();
return 0;
no_apic:
- printk(KERN_INFO "No local APIC present or hardware disabled\n");
+ pr_info("No local APIC present or hardware disabled\n");
return -1;
}
#endif
@@ -1584,12 +1570,12 @@ int __init APIC_init_uniprocessor(void)
{
#ifdef CONFIG_X86_64
if (disable_apic) {
- printk(KERN_INFO "Apic disabled\n");
+ pr_info("Apic disabled\n");
return -1;
}
if (!cpu_has_apic) {
disable_apic = 1;
- printk(KERN_INFO "Apic disabled by BIOS\n");
+ pr_info("Apic disabled by BIOS\n");
return -1;
}
#else
@@ -1601,8 +1587,8 @@ int __init APIC_init_uniprocessor(void)
*/
if (!cpu_has_apic &&
APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) {
- printk(KERN_ERR "BIOS bug, local APIC 0x%x not detected!...\n",
- boot_cpu_physical_apicid);
+ pr_err("BIOS bug, local APIC 0x%x not detected!...\n",
+ boot_cpu_physical_apicid);
clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
return -1;
}
@@ -1694,8 +1680,8 @@ void smp_spurious_interrupt(struct pt_regs *regs)
inc_irq_stat(irq_spurious_count);
/* see sw-dev-man vol 3, chapter 7.4.13.5 */
- printk(KERN_INFO "spurious APIC interrupt on CPU#%d, "
- "should never happen.\n", smp_processor_id());
+ pr_info("spurious APIC interrupt on CPU#%d, "
+ "should never happen.\n", smp_processor_id());
irq_exit();
}
@@ -1717,17 +1703,18 @@ void smp_error_interrupt(struct pt_regs *regs)
ack_APIC_irq();
atomic_inc(&irq_err_count);
- /* Here is what the APIC error bits mean:
- 0: Send CS error
- 1: Receive CS error
- 2: Send accept error
- 3: Receive accept error
- 4: Reserved
- 5: Send illegal vector
- 6: Received illegal vector
- 7: Illegal register address
- */
- printk(KERN_DEBUG "APIC error on CPU%d: %02x(%02x)\n",
+ /*
+ * Here is what the APIC error bits mean:
+ * 0: Send CS error
+ * 1: Receive CS error
+ * 2: Send accept error
+ * 3: Receive accept error
+ * 4: Reserved
+ * 5: Send illegal vector
+ * 6: Received illegal vector
+ * 7: Illegal register address
+ */
+ pr_debug("APIC error on CPU%d: %02x(%02x)\n",
smp_processor_id(), v , v1);
irq_exit();
}
@@ -1831,15 +1818,15 @@ void __cpuinit generic_processor_info(int apicid, int version)
* Validate version
*/
if (version == 0x0) {
- printk(KERN_WARNING "BIOS bug, APIC version is 0 for CPU#%d! "
- "fixing up to 0x10. (tell your hw vendor)\n",
- version);
+ pr_warning("BIOS bug, APIC version is 0 for CPU#%d! "
+ "fixing up to 0x10. (tell your hw vendor)\n",
+ version);
version = 0x10;
}
apic_version[apicid] = version;
if (num_processors >= NR_CPUS) {
- printk(KERN_WARNING "WARNING: NR_CPUS limit of %i reached."
+ pr_warning("WARNING: NR_CPUS limit of %i reached."
" Processor ignored.\n", NR_CPUS);
return;
}
@@ -2202,7 +2189,7 @@ static int __init apic_set_verbosity(char *arg)
else if (strcmp("verbose", arg) == 0)
apic_verbosity = APIC_VERBOSE;
else {
- printk(KERN_WARNING "APIC Verbosity level %s not recognised"
+ pr_warning("APIC Verbosity level %s not recognised"
" use apic=verbose or apic=debug\n", arg);
return -EINVAL;
}
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index 2c97f07f1c2..13316cf57cd 100644
--- a/arch/x86/kernel/nmi.c
+++ b/arch/x86/kernel/nmi.c
@@ -131,6 +131,11 @@ static void report_broken_nmi(int cpu, int *prev_nmi_count)
atomic_dec(&nmi_active);
}
+static void __acpi_nmi_disable(void *__unused)
+{
+ apic_write(APIC_LVT0, APIC_DM_NMI | APIC_LVT_MASKED);
+}
+
int __init check_nmi_watchdog(void)
{
unsigned int *prev_nmi_count;
@@ -179,8 +184,12 @@ int __init check_nmi_watchdog(void)
kfree(prev_nmi_count);
return 0;
error:
- if (nmi_watchdog == NMI_IO_APIC && !timer_through_8259)
- disable_8259A_irq(0);
+ if (nmi_watchdog == NMI_IO_APIC) {
+ if (!timer_through_8259)
+ disable_8259A_irq(0);
+ on_each_cpu(__acpi_nmi_disable, NULL, 1);
+ }
+
#ifdef CONFIG_X86_32
timer_ack = 0;
#endif
@@ -285,11 +294,6 @@ void acpi_nmi_enable(void)
on_each_cpu(__acpi_nmi_enable, NULL, 1);
}
-static void __acpi_nmi_disable(void *__unused)
-{
- apic_write(APIC_LVT0, APIC_DM_NMI | APIC_LVT_MASKED);
-}
-
/*
* Disable timer based NMIs on all CPUs:
*/
@@ -340,6 +344,8 @@ void stop_apic_nmi_watchdog(void *unused)
return;
if (nmi_watchdog == NMI_LOCAL_APIC)
lapic_watchdog_stop();
+ else
+ __acpi_nmi_disable(NULL);
__get_cpu_var(wd_enabled) = 0;
atomic_dec(&nmi_active);
}
@@ -465,6 +471,24 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
#ifdef CONFIG_SYSCTL
+static void enable_ioapic_nmi_watchdog_single(void *unused)
+{
+ __get_cpu_var(wd_enabled) = 1;
+ atomic_inc(&nmi_active);
+ __acpi_nmi_enable(NULL);
+}
+
+static void enable_ioapic_nmi_watchdog(void)
+{
+ on_each_cpu(enable_ioapic_nmi_watchdog_single, NULL, 1);
+ touch_nmi_watchdog();
+}
+
+static void disable_ioapic_nmi_watchdog(void)
+{
+ on_each_cpu(stop_apic_nmi_watchdog, NULL, 1);
+}
+
static int __init setup_unknown_nmi_panic(char *str)
{
unknown_nmi_panic = 1;
@@ -507,6 +531,11 @@ int proc_nmi_enabled(struct ctl_table *table, int write, struct file *file,
enable_lapic_nmi_watchdog();
else
disable_lapic_nmi_watchdog();
+ } else if (nmi_watchdog == NMI_IO_APIC) {
+ if (nmi_watchdog_enabled)
+ enable_ioapic_nmi_watchdog();
+ else
+ disable_ioapic_nmi_watchdog();
} else {
printk(KERN_WARNING
"NMI watchdog doesn't know what hardware to touch\n");
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 9d5674f7b6c..bdec76e5559 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -794,6 +794,9 @@ void __init setup_arch(char **cmdline_p)
printk(KERN_INFO "Command line: %s\n", boot_command_line);
#endif
+ /* VMI may relocate the fixmap; do this before touching ioremap area */
+ vmi_init();
+
early_cpu_init();
early_ioremap_init();
@@ -880,13 +883,8 @@ void __init setup_arch(char **cmdline_p)
check_efer();
#endif
-#if defined(CONFIG_VMI) && defined(CONFIG_X86_32)
- /*
- * Must be before kernel pagetables are setup
- * or fixmap area is touched.
- */
- vmi_init();
-#endif
+ /* Must be before kernel pagetables are setup */
+ vmi_activate();
/* after early param, so could get panic from serial */
reserve_early_setup_data();
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 7b109339731..f71f96fc9e6 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -294,9 +294,7 @@ static void __cpuinit start_secondary(void *unused)
* fragile that we want to limit the things done here to the
* most necessary things.
*/
-#ifdef CONFIG_VMI
vmi_bringup();
-#endif
cpu_init();
preempt_disable();
smp_callin();
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 8b6c393ab9f..22fd6577156 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -960,8 +960,6 @@ static inline int __init activate_vmi(void)
void __init vmi_init(void)
{
- unsigned long flags;
-
if (!vmi_rom)
probe_vmi_rom();
else
@@ -973,13 +971,21 @@ void __init vmi_init(void)
reserve_top_address(-vmi_rom->virtual_top);
- local_irq_save(flags);
- activate_vmi();
-
#ifdef CONFIG_X86_IO_APIC
/* This is virtual hardware; timer routing is wired correctly */
no_timer_check = 1;
#endif
+}
+
+void vmi_activate(void)
+{
+ unsigned long flags;
+
+ if (!vmi_rom)
+ return;
+
+ local_irq_save(flags);
+ activate_vmi();
local_irq_restore(flags & X86_EFLAGS_IF);
}