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Re: [Xen-devel] [PATCH] Fix build failure in 32 environment

To: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] Fix build failure in 32 environment
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Mon, 14 Dec 2009 16:28:14 +0000
Cc: "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On 14/12/2009 15:48, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

> If I remember correctly, rdtscp is a valid instruction
> in 32-bit mode so why are you disabling support for
> 32-bit Xen?
> Personally, I don't care if 32-bit Xen is supported,
> but either we need to say it is supported or it is
> not supported, not have new features randomly choose
> to support it or not, especially features that have
> impact on userland applications.

It can be supported for existign features but not all new ones. We can
perhaps retire it all together after 4.0.

 -- Keir

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