Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / arch / x86_64 / kernel / io_apic-xen.c

diff --git a/arch/x86_64/kernel/io_apic-xen.c b/arch/x86_64/kernel/io_apic-xen.c
index a6ba277..9ba203b 100644 (file)
--- a/arch/x86_64/kernel/io_apic-xen.c
+++ b/arch/x86_64/kernel/io_apic-xen.c
@@ -25,7 +25,6 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/sched.h>
-#include <linux/config.h>
 #include <linux/smp_lock.h>
 #include <linux/mc146818rtc.h>
 #include <linux/acpi.h>
@@ -41,6 +40,7 @@
 #include <asm/mach_apic.h>
 #include <asm/acpi.h>
 #include <asm/dma.h>
+#include <asm/nmi.h>
 
 #define __apicdebuginit  __init
 
@@ -58,6 +58,7 @@ static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
 #endif
 
 static DEFINE_SPINLOCK(ioapic_lock);
+static DEFINE_SPINLOCK(vector_lock);
 
 /*
  * # of IRQ routing registers
@@ -321,6 +322,18 @@ __setup("enable_8254_timer", setup_enable_8254_timer);
 #include <linux/pci_ids.h>
 #include <linux/pci.h>
 
+
+#ifdef CONFIG_ACPI
+
+static int nvidia_hpet_detected __initdata;
+
+static int __init nvidia_hpet_check(unsigned long phys, unsigned long size)
+{
+       nvidia_hpet_detected = 1;
+       return 0;
+}
+#endif
+
 /* Temporary Hack. Nvidia and VIA boards currently only work with IO-APIC
    off. Check for an Nvidia or VIA PCI bridge and turn it off.
    Use pci direct infrastructure because this runs before the PCI subsystem. 
@@ -355,7 +368,7 @@ void __init check_ioapic(void)
                                vendor &= 0xffff;
                                switch (vendor) { 
                                case PCI_VENDOR_ID_VIA:
-#ifdef CONFIG_GART_IOMMU
+#ifdef CONFIG_IOMMU
                                        if ((end_pfn > MAX_DMA32_PFN ||
                                             force_iommu) &&
                                            !iommu_aperture_allowed) {
@@ -367,11 +380,19 @@ void __init check_ioapic(void)
                                        return;
                                case PCI_VENDOR_ID_NVIDIA:
 #ifdef CONFIG_ACPI
-                                       /* All timer overrides on Nvidia
-                                          seem to be wrong. Skip them. */
-                                       acpi_skip_timer_override = 1;
-                                       printk(KERN_INFO 
-            "Nvidia board detected. Ignoring ACPI timer override.\n");
+                                       /*
+                                        * All timer overrides on Nvidia are
+                                        * wrong unless HPET is enabled.
+                                        */
+                                       nvidia_hpet_detected = 0;
+                                       acpi_table_parse(ACPI_HPET,
+                                                       nvidia_hpet_check);
+                                       if (nvidia_hpet_detected == 0) {
+                                               acpi_skip_timer_override = 1;
+                                               printk(KERN_INFO "Nvidia board "
+                                                   "detected. Ignoring ACPI "
+                                                   "timer override.\n");
+                                       }
 #endif
                                        /* RED-PEN skip them on mptables too? */
                                        return;
@@ -868,11 +889,16 @@ u8 irq_vector[NR_IRQ_VECTORS] __read_mostly;
 int assign_irq_vector(int irq)
 {
        struct physdev_irq irq_op;
-  
+       unsigned long flags;
+
        BUG_ON(irq != AUTO_ASSIGN && (unsigned)irq >= NR_IRQ_VECTORS);
-       if (irq != AUTO_ASSIGN && IO_APIC_VECTOR(irq) > 0)
-               return IO_APIC_VECTOR(irq);
 
+       spin_lock_irqsave(&vector_lock, flags);
+
+       if (irq != AUTO_ASSIGN && IO_APIC_VECTOR(irq) > 0) {
+               spin_unlock_irqrestore(&vector_lock, flags);
+               return IO_APIC_VECTOR(irq);
+       }
        irq_op.irq = irq;
        if (HYPERVISOR_physdev_op(PHYSDEVOP_alloc_irq_vector, &irq_op))
                return -ENOSPC;
@@ -881,6 +907,7 @@ int assign_irq_vector(int irq)
        if (irq != AUTO_ASSIGN)
                IO_APIC_VECTOR(irq) = irq_op.vector;
 
+       spin_unlock_irqrestore(&vector_lock, flags);
        return irq_op.vector;
 }
 
@@ -893,23 +920,18 @@ static struct hw_interrupt_type ioapic_edge_type;
 #define IOAPIC_EDGE    0
 #define IOAPIC_LEVEL   1
 
-static inline void ioapic_register_intr(int irq, int vector, unsigned long trigger)
+static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
 {
-       if (use_pci_vector() && !platform_legacy_irq(irq)) {
-               if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
-                               trigger == IOAPIC_LEVEL)
-                       irq_desc[vector].handler = &ioapic_level_type;
-               else
-                       irq_desc[vector].handler = &ioapic_edge_type;
-               set_intr_gate(vector, interrupt[vector]);
-       } else  {
-               if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
-                               trigger == IOAPIC_LEVEL)
-                       irq_desc[irq].handler = &ioapic_level_type;
-               else
-                       irq_desc[irq].handler = &ioapic_edge_type;
-               set_intr_gate(vector, interrupt[irq]);
-       }
+       unsigned idx;
+
+       idx = use_pci_vector() && !platform_legacy_irq(irq) ? vector : irq;
+
+       if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
+                       trigger == IOAPIC_LEVEL)
+               irq_desc[idx].chip = &ioapic_level_type;
+       else
+               irq_desc[idx].chip = &ioapic_edge_type;
+       set_intr_gate(vector, interrupt[idx]);
 }
 #else
 #define ioapic_register_intr(_irq,_vector,_trigger) ((void)0)
@@ -1014,7 +1036,7 @@ static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, in
         * The timer IRQ doesn't have to know that behind the
         * scene we have a 8259A-master in AEOI mode ...
         */
-       irq_desc[0].handler = &ioapic_edge_type;
+       irq_desc[0].chip = &ioapic_edge_type;
 
        /*
         * Add it to the IO-APIC irq-routing table:
@@ -1659,6 +1681,13 @@ static void set_ioapic_affinity_vector (unsigned int vector,
 #endif // CONFIG_SMP
 #endif // CONFIG_PCI_MSI
 
+static int ioapic_retrigger(unsigned int irq)
+{
+       send_IPI_self(IO_APIC_VECTOR(irq));
+
+       return 1;
+}
+
 /*
  * Level and edge triggered IO-APIC interrupts need different handling,
  * so we use two separate IRQ descriptors. Edge triggered IRQs can be
@@ -1679,6 +1708,7 @@ static struct hw_interrupt_type ioapic_edge_type __read_mostly = {
 #ifdef CONFIG_SMP
        .set_affinity = set_ioapic_affinity,
 #endif
+       .retrigger      = ioapic_retrigger,
 };
 
 static struct hw_interrupt_type ioapic_level_type __read_mostly = {
@@ -1692,6 +1722,7 @@ static struct hw_interrupt_type ioapic_level_type __read_mostly = {
 #ifdef CONFIG_SMP
        .set_affinity = set_ioapic_affinity,
 #endif
+       .retrigger      = ioapic_retrigger,
 };
 #endif /* !CONFIG_XEN */
 
@@ -1728,7 +1759,7 @@ static inline void init_IO_APIC_traps(void)
 #ifndef CONFIG_XEN
                        else
                                /* Strange. Oh, well.. */
-                               irq_desc[irq].handler = &no_irq_type;
+                               irq_desc[irq].chip = &no_irq_type;
 #endif
                }
        }
@@ -1947,7 +1978,7 @@ static inline void check_timer(void)
        apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as Virtual Wire IRQ...");
 
        disable_8259A_irq(0);
-       irq_desc[0].handler = &lapic_irq_type;
+       irq_desc[0].chip = &lapic_irq_type;
        apic_write(APIC_LVT0, APIC_DM_FIXED | vector);  /* Fixed mode */
        enable_8259A_irq(0);