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SubjectRe: kernel boot hangs after x86: insert_resorce for lapic addr after e820_reserve_resources
On Sun, May 18, 2008 at 3:23 PM, Ciaran McCreesh
<ciaran.mccreesh@googlemail.com> wrote:
> On Sun, 18 May 2008 14:00:16 -0700
> "Yinghai Lu" <yhlu.kernel@gmail.com> 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);
+ }
}
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