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Re: [Xen-devel] Re: [PATCH] remove _PS0 from the DSDTo

To: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH] remove _PS0 from the DSDTo
From: Jason Kwon <jason.kwon@xxxxxxxxxxxx>
Date: Thu, 17 Mar 2011 14:21:49 -0700
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Kay, Allen M" <allen.m.kay@xxxxxxxxx>, Guyader <Jean.Guyader@xxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Jean
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On 03/17/2011 12:15 PM, Stefano Stabellini wrote:
On Thu, 17 Mar 2011, Jason Kwon wrote:
On 03/17/2011 11:40 AM, Stefano Stabellini wrote:
On Thu, 17 Mar 2011, Jason Kwon wrote:
Stefano Stabellini wrote:
On Mon, 28 Feb 2011, Paolo Bonzini wrote:
On 02/28/2011 04:33 PM, Stefano Stabellini wrote:
However there is a simple workaround for it: just disable acpi in the
config file of the VM.
I think recent Windows versions (Vista and newer) do not boot at all
without ACPI.
I am not suggesting to disable ACPI altogether. I am just saying that
the only way to get a recent Linux HVM guest to drive a VF is to disable
ACPI, unfortunately.

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Hello,

Has this hvmloader patch been finalized?  I updated to Xen 4.1 rc7/Dom0
2.6.32.32, and saw that the register_slot ACPI fixes were in the Dom0
kernel, but not this hvmloader change.  I previously tested this patch
on Xen 4.1 rc4 and had success with it when booting linux guests.
we are trying to fix this on the Linux kernel side, we have two patches
waiting to be applied:

https://lkml.org/lkml/2011/2/28/296
https://lkml.org/lkml/2011/3/8/212

Thanks Stefano, I missed the second kernel patch.  Just to clarify,
should these patches be applied to Dom0 or the guest kernel (or both)?

the guest's kernel
Does this mean VF passthrough will not be supported for guests running kernels older than 2.6.39 (or whichever kernel incorporates these patches)? I was happy with the hvmloader patch, in that it allowed me to use VF passthrough with older kernels.

Jason

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