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Re: [Xen-devel] [PATCH] x86: add support for domain initiated global cac

To: Jan Beulich <JBeulich@xxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] x86: add support for domain initiated global cache flush
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date: Mon, 3 May 2010 13:37:16 -0400
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On Thu, Apr 29, 2010 at 04:59:49PM +0100, Jan Beulich wrote:
> Newer Linux' AGP code wants to flush caches on all CPUs under certain
> circumstances. Since doing this on all vCPU-s of the domain in
> question doesn't yield the intended effect, this needs to be done in
> the hypervisor. Add a new MMUEXT operation for this.

Is there a corresponding patch for this new hypercall API?
> While looking at the pre-existing flush implementation, I also noticed
> an off-by-one error in the cache flush portion of flush_area_local().

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