linux-kernel - Re: [PATCH 04/11] VT-d: Change {un}map_range functions to implement {un}map interface

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Message-ID: <1264712382.9059.1109.camel@macbook.infradead.org>
Date:	Fri, 29 Jan 2010 09:59:42 +1300
From:	David Woodhouse <dwmw2@...radead.org>
To:	Joerg Roedel <joerg.roedel@....com>
Cc:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	kvm@...r.kernel.org, iommu@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/11] VT-d: Change {un}map_range functions to
 implement {un}map interface

On Thu, 2010-01-28 at 12:37 +0100, Joerg Roedel wrote:
> This patch changes the iommu-api functions for mapping and
> unmapping page ranges to use the new page-size based
> interface. This allows to remove the range based functions
> later. 

> +       size     = 0x1000UL << gfp_order;

Um, that's not a page-size based interface. Page size isn't always 4KiB;
this code runs on IA64 too.

We have enough fun with CPU vs. DMA page size on IA64 already :)

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation

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