Re: [Xen-devel] [PATCH] pci-ioapic-0502.patch

[Patrick Scharrenberg <pittipatti@xxxxxx>]

Hi!

Ah great! I've been looking forward to that patch for some time now  :-) 
Unfortunately it isn't working on my machine. :-/

xen boots, but dom0 freezes while loading the sata-driver.
It is the "silicon image" sata-driver from the scsi-section in
kernel-config.
The system freezes after the line "applying Seagate errata fix" (there
are some issuse between silicon image and seagate)

There exist another driver for that controller in the ATA-section.
When using this driver the system does not freeze, but stops at
sata-driver-loading as well.
But here after some time I get a "lost interrupt" message.

When booting without your patch the sata-controller uses irg 5 and
shares it with 7 other pci-devices.
With your patch the controller uses irq 18, so io-apic is used.

The system is an amd duron with nforce2 chipset.

patrick



Arun Sharma schrieb:

>>Move PCI device scanning to dom0. Enable ACPI in dom0. This should greatly
>>reduce the complexity of xen and move the complexity of dealing with
>>hardware bugs and workarounds etc to dom0.
>>
>>The ioapic local apic (and hence all the vectors) are owned by the hypervisor.
>>Dom0 enables the ACPI interpreter, handles PCI and ACPI based interrupt 
>>routing. 
>>
>>New hypercalls to assign vectors and for accessing the ioapic.
>>
>>Functionality not yet provided:
>>
>>o acpi=off to support machines with broken or no acpi support.
>>o support for driver domains 
>>
>>  
>>
>  
>


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