Xen devel - Aug 2005 - SATA detect fails on ICH7 chipset / Dell Poweredge SC430

Hi,

I have a Dell Poweredge SC420 and a SC430. The SC420 has an ICH6
chipset and works ok with Xen. The SC430 has an ICH7 chipset and the
SATA detection fails. I''ve tried 2.6.11.10 and 2.6.12.5 kernels, with
Xen 2.0.7, Xen-testing and Xen-unstable, all with the same results.
I''m using the same hypervisor and kernel binaries, so problems with
the compiler environment etc. have been ruled out.

Boot logs attached from Xen-unstable on 2.6.12.5 kernel. Any fixes
would be welcome :-)

Cheers,
Chris



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> I have a Dell Poweredge SC420 and a SC430. The SC420 has an 
> ICH6 chipset and works ok with Xen. The SC430 has an ICH7 
> chipset and the SATA detection fails. I''ve tried 2.6.11.10 
> and 2.6.12.5 kernels, with Xen 2.0.7, Xen-testing and 
> Xen-unstable, all with the same results.
> I''m using the same hypervisor and kernel binaries, so 
> problems with the compiler environment etc. have been ruled out.
> 
> Boot logs attached from Xen-unstable on 2.6.12.5 kernel. Any 
> fixes would be welcome :-)
Having the bootlog from a native build of 2.6.12.5 would be useful to
compare against the 2.6.12.5-xen0.

When running native linux, what driver is used for the SATA controller?
Are you sure its actually compiled in to our -xen0 config?

Incidently, have you tried using the -xen kerenel plus modules that are
in our -unstable install tar ball?  This is the kernel that end-users
are intended to use: -xen0/-xenU are just for developers'' convenience
(fewer modules, faster to build).

Best,
Ian

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> Having the bootlog from a native build of 2.6.12.5 would be useful to
> compare against the 2.6.12.5-xen0.
Attached.
> When running native linux, what driver is used for the SATA controller?
> Are you sure its actually compiled in to our -xen0 config?
The one in Config->SCSI->Sata->Intel PIIX/ICH SATA Support.  I have
the AHCI driver builtin as well.

I''m sure the SATA support works. I''ve used the exact same
hypervisor
and kernel images to boot on the sc420, and the same driver works on
the sc430 without Xen.

The difference seems to be that under sc430-xen we get:

ata_piix: probe of 0000:00:1f.2 failed with error -12

instead of (sc430 native):

ACPI: PCI Interrupt 0000:00:1f.2[C] -> GSI 20 (level, low) -> IRQ 20
ata1: SATA max UDMA/133 cmd 0xFE00 ctl 0xFE12 bmdma 0xFEA0 irq 20
ata2: SATA max UDMA/133 cmd 0xFE20 ctl 0xFE32 bmdma 0xFEA8 irq 20

or (sc420-xen):

ACPI: PCI Interrupt 0000:00:1f.2[C] -> GSI 20 (level, low) -> IRQ 20
ahci(0000:00:1f.2) AHCI 0001.0000 32 slots 4 ports 1.5 Gbps 0xf impl IDE mode
ahci(0000:00:1f.2) flags: 64bit ncq pm led slum part

It seems the sc430-xen isn''t doing something related to ACPI that
enables the hardware to be detected?
> Incidently, have you tried using the -xen kerenel plus modules that are
> in our -unstable install tar ball?  This is the kernel that end-users
> are intended to use: -xen0/-xenU are just for developers''
convenience
> (fewer modules, faster to build).
I took the unstable tarball, patched the kernel with the
patches/linux-2.6.12 diffs, and copied over the linux-2.6-xen-sparse
directory. After building it boots on the sc420 so I don''t think
it''s
a problem with the build stage, but I can try something else if it
would help.


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