Re: [Xen-users] Re: [Xen-devel] Xen - Guest memory allocation

To:	"dinesh chandrasekaran" <dinesh_chan8@xxxxxxxxxxx>
Subject:	Re: [Xen-users] Re: [Xen-devel] Xen - Guest memory allocation
From:	"Grzegorz Miłoś" <gm281@xxxxxxxxx>
Date:	Fri, 20 Jun 2008 18:03:20 +0100
Cc:	xen developers community <xen-devel@xxxxxxxxxxxxxxxxxxx>, xen users community <xen-users@xxxxxxxxxxxxxxxxxxx>
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>> Why do you want to restrict DomU to use frames from certain range
>> only? What's the logic behind that?
>
> Im trying to allocate memory for domUs from memory behind a PCI device. The
> machine_addr_start is obtained by probing the device (as I know the vendor
> and device info) during xen boot-up.

That's what I was suspecting. I think you should give PCI passthrough
a go first.
PCI passthrough allows a PCI device to be hidden away from Dom0 and
exported to a DomU. You achieve the first by passing
pciback.hide=(XX:XX.X) option to Dom0 kernel and adding pci = [
'XX:XX.X′ ] to DomU config file. You'll also need
CONFIG_XEN_PCIDEV_FRONTEND=y and CONFIG_XEN_PCIDEV_BACKEND=y in your
DomU and Dom0 kernel configs.

Hope this helps
Gr(z)egor(z)

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Re: [Xen-users] Re: [Xen-devel] Xen - Guest memory allocation