Re: kernel boot hangs after x86: insert_resorce for lapic addr after e820_reserve_resources

[Yinghai Lu]

On Sun, May 18, 2008 at 3:23 PM, Ciaran McCreesh
<ciaran.mccreesh@xxxxxxxxxxxxxx> wrote:
> On Sun, 18 May 2008 14:00:16 -0700
> "Yinghai Lu" <yhlu.kernel@xxxxxxxxx> wrote:
>> >> wonder if init_apic_mapping need some delay with that strange
>> >> chipset.
>> >
>> > I don't see any additional information with apic=verbose with the
>> > broken kernel (although I only have a screen's worth of text that I
>> > can see -- the kernel doesn't get far enough to let me grab it).
>> > I've attached dmesg from a working kernel with apic=verbose in case
>> > that helps.
>>
>> or try to boot with initcall_debug to see where did it hang.
>
> The last initcall_debug messages are:
>
>    calling atiixp_ide_init+0x0/0x20
>    initcall atiixp_ide_init+0x0/0x20 returned 0 after 0 msecs
>    calling piix_ide_init+0x0/0xc0
>    initcall piix_ide_init+0x0/0xc0 returned 0 after 0 msecs
>    calling ide_scan_pcibus+0x0/0x100
>
> ide_scan_pcibus doesn't return. I tried shoving some printks in there,
> but as soon as I did it instead locked up in pci_init. Is it worth
> continuing this approach or will doing so not give useful results
> anyway?

could be pci iomem conflicts...
please enable CONFIG_PCI_DEBUG=y
and apply the following two debug patches

YH
Index: linux-2.6/drivers/pci/probe.c
===================================================================
--- linux-2.6.orig/drivers/pci/probe.c
+++ linux-2.6/drivers/pci/probe.c
@@ -275,6 +275,7 @@ static void pci_read_bases(struct pci_de
 			}
 			res->start = l64 & PCI_BASE_ADDRESS_MEM_MASK;
 			res->end = res->start + sz64;
+			printk(KERN_INFO "PCI: %s reg %x 64bit mmio: [%llx, %llx]\n", pci_name(dev), reg, res->start, res->end);
 #else
 			if (sz64 > 0x100000000ULL) {
 				printk(KERN_ERR "PCI: Unable to handle 64-bit "
@@ -290,6 +291,8 @@ static void pci_read_bases(struct pci_de
 				res->end = sz;
 			}
 #endif
+		} else {
+			printk(KERN_INFO "PCI: %s reg %x %s: [%llx, %llx]\n", pci_name(dev), reg, (res->flags & IORESOURCE_IO)? "io port":"32bit mmio", res->start, res->end);
 		}
 	}
 	if (rom) {
@@ -357,6 +360,7 @@ void __devinit pci_read_bridge_bases(str
 			res->start = base;
 		if (!res->end)
 			res->end = limit + 0xfff;
+		printk(KERN_INFO "PCI: bridge %s io port: [%llx, %llx]\n", pci_name(dev), res->start, res->end);
 	}
 
 	res = child->resource[1];
@@ -368,6 +372,7 @@ void __devinit pci_read_bridge_bases(str
 		res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM;
 		res->start = base;
 		res->end = limit + 0xfffff;
+		printk(KERN_INFO "PCI: bridge %s 32bit mmio: [%llx, %llx]\n", pci_name(dev), res->start, res->end);
 	}
 
 	res = child->resource[2];
@@ -402,6 +407,7 @@ void __devinit pci_read_bridge_bases(str
 		res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM | IORESOURCE_PREFETCH;
 		res->start = base;
 		res->end = limit + 0xfffff;
+		printk(KERN_INFO "PCI: bridge %s %sbit mmio pref: [%llx, %llx]\n", pci_name(dev), (res->flags & PCI_PREF_RANGE_TYPE_64)?"64":"32",res->start, res->end);
 	}
 }
 
Index: linux-2.6/drivers/pci/setup-bus.c
===================================================================
--- linux-2.6.orig/drivers/pci/setup-bus.c
+++ linux-2.6/drivers/pci/setup-bus.c
@@ -537,6 +537,36 @@ void __ref pci_bus_assign_resources(stru
 }
 EXPORT_SYMBOL(pci_bus_assign_resources);
 
+static void pci_bus_dump_res(struct pci_bus *bus)
+{
+        int i;
+
+        for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
+                struct resource *res = bus->resource[i];
+                if (!res)
+                        continue;
+
+		printk(KERN_INFO "bus: %02x index %x %s: [%llx, %llx]\n", bus->number, i, (res->flags & IORESOURCE_IO)? "io port":"mmio", res->start, res->end);
+        }
+}
+
+static void pci_bus_dump_resources(struct pci_bus *bus)
+{
+	struct pci_bus *b;
+	struct pci_dev *dev;
+
+
+	pci_bus_dump_res(bus);
+
+	list_for_each_entry(dev, &bus->devices, bus_list) {
+		b = dev->subordinate;
+		if (!b)
+			continue;
+
+		pci_bus_dump_resources(b);
+	}
+}
+
 void __init
 pci_assign_unassigned_resources(void)
 {
@@ -552,4 +582,9 @@ pci_assign_unassigned_resources(void)
 		pci_bus_assign_resources(bus);
 		pci_enable_bridges(bus);
 	}
+
+	/* dump the resource on buses */
+	list_for_each_entry(bus, &pci_root_buses, node) {
+		pci_bus_dump_resources(bus);
+	}
 }