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-rw-r--r--arch/x86/kernel/entry_64.S4
-rw-r--r--arch/x86/kernel/irq.c20
-rw-r--r--arch/x86/kernel/irqinit.c4
-rw-r--r--arch/x86/kernel/uv_time.c80
4 files changed, 63 insertions, 45 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 4deb8fc849d..63bca794c8f 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -977,8 +977,8 @@ apicinterrupt UV_BAU_MESSAGE \
#endif
apicinterrupt LOCAL_TIMER_VECTOR \
apic_timer_interrupt smp_apic_timer_interrupt
-apicinterrupt GENERIC_INTERRUPT_VECTOR \
- generic_interrupt smp_generic_interrupt
+apicinterrupt X86_PLATFORM_IPI_VECTOR \
+ x86_platform_ipi smp_x86_platform_ipi
#ifdef CONFIG_SMP
apicinterrupt INVALIDATE_TLB_VECTOR_START+0 \
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index fee6cc2b207..664bcb7384a 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -18,7 +18,7 @@
atomic_t irq_err_count;
/* Function pointer for generic interrupt vector handling */
-void (*generic_interrupt_extension)(void) = NULL;
+void (*x86_platform_ipi_callback)(void) = NULL;
/*
* 'what should we do if we get a hw irq event on an illegal vector'.
@@ -72,10 +72,10 @@ static int show_other_interrupts(struct seq_file *p, int prec)
seq_printf(p, "%10u ", irq_stats(j)->apic_pending_irqs);
seq_printf(p, " Performance pending work\n");
#endif
- if (generic_interrupt_extension) {
+ if (x86_platform_ipi_callback) {
seq_printf(p, "%*s: ", prec, "PLT");
for_each_online_cpu(j)
- seq_printf(p, "%10u ", irq_stats(j)->generic_irqs);
+ seq_printf(p, "%10u ", irq_stats(j)->x86_platform_ipis);
seq_printf(p, " Platform interrupts\n");
}
#ifdef CONFIG_SMP
@@ -187,8 +187,8 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
sum += irq_stats(cpu)->apic_perf_irqs;
sum += irq_stats(cpu)->apic_pending_irqs;
#endif
- if (generic_interrupt_extension)
- sum += irq_stats(cpu)->generic_irqs;
+ if (x86_platform_ipi_callback)
+ sum += irq_stats(cpu)->x86_platform_ipis;
#ifdef CONFIG_SMP
sum += irq_stats(cpu)->irq_resched_count;
sum += irq_stats(cpu)->irq_call_count;
@@ -251,9 +251,9 @@ unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
}
/*
- * Handler for GENERIC_INTERRUPT_VECTOR.
+ * Handler for X86_PLATFORM_IPI_VECTOR.
*/
-void smp_generic_interrupt(struct pt_regs *regs)
+void smp_x86_platform_ipi(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
@@ -263,10 +263,10 @@ void smp_generic_interrupt(struct pt_regs *regs)
irq_enter();
- inc_irq_stat(generic_irqs);
+ inc_irq_stat(x86_platform_ipis);
- if (generic_interrupt_extension)
- generic_interrupt_extension();
+ if (x86_platform_ipi_callback)
+ x86_platform_ipi_callback();
irq_exit();
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index 40f30773fb2..d5932226614 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -200,8 +200,8 @@ static void __init apic_intr_init(void)
/* self generated IPI for local APIC timer */
alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
- /* generic IPI for platform specific use */
- alloc_intr_gate(GENERIC_INTERRUPT_VECTOR, generic_interrupt);
+ /* IPI for X86 platform specific use */
+ alloc_intr_gate(X86_PLATFORM_IPI_VECTOR, x86_platform_ipi);
/* IPI vectors for APIC spurious and error interrupts */
alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
diff --git a/arch/x86/kernel/uv_time.c b/arch/x86/kernel/uv_time.c
index 583f11d5c48..3c84aa001c1 100644
--- a/arch/x86/kernel/uv_time.c
+++ b/arch/x86/kernel/uv_time.c
@@ -74,7 +74,7 @@ struct uv_rtc_timer_head {
*/
static struct uv_rtc_timer_head **blade_info __read_mostly;
-static int uv_rtc_enable;
+static int uv_rtc_evt_enable;
/*
* Hardware interface routines
@@ -90,7 +90,7 @@ static void uv_rtc_send_IPI(int cpu)
pnode = uv_apicid_to_pnode(apicid);
val = (1UL << UVH_IPI_INT_SEND_SHFT) |
(apicid << UVH_IPI_INT_APIC_ID_SHFT) |
- (GENERIC_INTERRUPT_VECTOR << UVH_IPI_INT_VECTOR_SHFT);
+ (X86_PLATFORM_IPI_VECTOR << UVH_IPI_INT_VECTOR_SHFT);
uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
}
@@ -115,7 +115,7 @@ static int uv_setup_intr(int cpu, u64 expires)
uv_write_global_mmr64(pnode, UVH_EVENT_OCCURRED0_ALIAS,
UVH_EVENT_OCCURRED0_RTC1_MASK);
- val = (GENERIC_INTERRUPT_VECTOR << UVH_RTC1_INT_CONFIG_VECTOR_SHFT) |
+ val = (X86_PLATFORM_IPI_VECTOR << UVH_RTC1_INT_CONFIG_VECTOR_SHFT) |
((u64)cpu_physical_id(cpu) << UVH_RTC1_INT_CONFIG_APIC_ID_SHFT);
/* Set configuration */
@@ -123,7 +123,10 @@ static int uv_setup_intr(int cpu, u64 expires)
/* Initialize comparator value */
uv_write_global_mmr64(pnode, UVH_INT_CMPB, expires);
- return (expires < uv_read_rtc(NULL) && !uv_intr_pending(pnode));
+ if (uv_read_rtc(NULL) <= expires)
+ return 0;
+
+ return !uv_intr_pending(pnode);
}
/*
@@ -223,6 +226,7 @@ static int uv_rtc_set_timer(int cpu, u64 expires)
next_cpu = head->next_cpu;
*t = expires;
+
/* Will this one be next to go off? */
if (next_cpu < 0 || bcpu == next_cpu ||
expires < head->cpu[next_cpu].expires) {
@@ -231,7 +235,7 @@ static int uv_rtc_set_timer(int cpu, u64 expires)
*t = ULLONG_MAX;
uv_rtc_find_next_timer(head, pnode);
spin_unlock_irqrestore(&head->lock, flags);
- return 1;
+ return -ETIME;
}
}
@@ -244,7 +248,7 @@ static int uv_rtc_set_timer(int cpu, u64 expires)
*
* Returns 1 if this timer was pending.
*/
-static int uv_rtc_unset_timer(int cpu)
+static int uv_rtc_unset_timer(int cpu, int force)
{
int pnode = uv_cpu_to_pnode(cpu);
int bid = uv_cpu_to_blade_id(cpu);
@@ -256,14 +260,15 @@ static int uv_rtc_unset_timer(int cpu)
spin_lock_irqsave(&head->lock, flags);
- if (head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t)
+ if ((head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t) || force)
rc = 1;
- *t = ULLONG_MAX;
-
- /* Was the hardware setup for this timer? */
- if (head->next_cpu == bcpu)
- uv_rtc_find_next_timer(head, pnode);
+ if (rc) {
+ *t = ULLONG_MAX;
+ /* Was the hardware setup for this timer? */
+ if (head->next_cpu == bcpu)
+ uv_rtc_find_next_timer(head, pnode);
+ }
spin_unlock_irqrestore(&head->lock, flags);
@@ -310,32 +315,32 @@ static void uv_rtc_timer_setup(enum clock_event_mode mode,
break;
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
- uv_rtc_unset_timer(ced_cpu);
+ uv_rtc_unset_timer(ced_cpu, 1);
break;
}
}
static void uv_rtc_interrupt(void)
{
- struct clock_event_device *ced = &__get_cpu_var(cpu_ced);
int cpu = smp_processor_id();
+ struct clock_event_device *ced = &per_cpu(cpu_ced, cpu);
if (!ced || !ced->event_handler)
return;
- if (uv_rtc_unset_timer(cpu) != 1)
+ if (uv_rtc_unset_timer(cpu, 0) != 1)
return;
ced->event_handler(ced);
}
-static int __init uv_enable_rtc(char *str)
+static int __init uv_enable_evt_rtc(char *str)
{
- uv_rtc_enable = 1;
+ uv_rtc_evt_enable = 1;
return 1;
}
-__setup("uvrtc", uv_enable_rtc);
+__setup("uvrtcevt", uv_enable_evt_rtc);
static __init void uv_rtc_register_clockevents(struct work_struct *dummy)
{
@@ -350,27 +355,32 @@ static __init int uv_rtc_setup_clock(void)
{
int rc;
- if (!uv_rtc_enable || !is_uv_system() || generic_interrupt_extension)
+ if (!is_uv_system())
return -ENODEV;
- generic_interrupt_extension = uv_rtc_interrupt;
-
clocksource_uv.mult = clocksource_hz2mult(sn_rtc_cycles_per_second,
clocksource_uv.shift);
+ /* If single blade, prefer tsc */
+ if (uv_num_possible_blades() == 1)
+ clocksource_uv.rating = 250;
+
rc = clocksource_register(&clocksource_uv);
- if (rc) {
- generic_interrupt_extension = NULL;
+ if (rc)
+ printk(KERN_INFO "UV RTC clocksource failed rc %d\n", rc);
+ else
+ printk(KERN_INFO "UV RTC clocksource registered freq %lu MHz\n",
+ sn_rtc_cycles_per_second/(unsigned long)1E6);
+
+ if (rc || !uv_rtc_evt_enable || x86_platform_ipi_callback)
return rc;
- }
/* Setup and register clockevents */
rc = uv_rtc_allocate_timers();
- if (rc) {
- clocksource_unregister(&clocksource_uv);
- generic_interrupt_extension = NULL;
- return rc;
- }
+ if (rc)
+ goto error;
+
+ x86_platform_ipi_callback = uv_rtc_interrupt;
clock_event_device_uv.mult = div_sc(sn_rtc_cycles_per_second,
NSEC_PER_SEC, clock_event_device_uv.shift);
@@ -383,11 +393,19 @@ static __init int uv_rtc_setup_clock(void)
rc = schedule_on_each_cpu(uv_rtc_register_clockevents);
if (rc) {
- clocksource_unregister(&clocksource_uv);
- generic_interrupt_extension = NULL;
+ x86_platform_ipi_callback = NULL;
uv_rtc_deallocate_timers();
+ goto error;
}
+ printk(KERN_INFO "UV RTC clockevents registered\n");
+
+ return 0;
+
+error:
+ clocksource_unregister(&clocksource_uv);
+ printk(KERN_INFO "UV RTC clockevents failed rc %d\n", rc);
+
return rc;
}
arch_initcall(uv_rtc_setup_clock);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 07:46:51 +0000