linux-kernel - Re: [PATCH v4 2/7] iommu/core: split mapping to page sizes as supported by the hardware

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Message-ID: <CAK=WgbZbfCRJqA-wwHN=iLH6rYyoKjJCaL0zMfY93Tg6Jw2uvA@mail.gmail.com>
Date:	Thu, 10 Nov 2011 09:31:57 +0200
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	Kai Huang <mail.kai.huang@...il.com>
Cc:	iommu@...ts.linux-foundation.org, linux-omap@...r.kernel.org,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Joerg Roedel <Joerg.Roedel@....com>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-arm-kernel@...ts.infradead.org,
	David Brown <davidb@...eaurora.org>,
	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
	Hiroshi Doyu <hdoyu@...dia.com>,
	Stepan Moskovchenko <stepanm@...eaurora.org>,
	KyongHo Cho <pullip.cho@...sung.com>, kvm@...r.kernel.org
Subject: Re: [PATCH v4 2/7] iommu/core: split mapping to page sizes as
 supported by the hardware

On Thu, Nov 10, 2011 at 8:17 AM, Kai Huang <mail.kai.huang@...il.com> wrote:
> Seems the unmap function don't take phys as parameter, does this mean
> domain->ops->unmap will walk through the page table to find out the
> actual page size?

The short answer is yes, and furthermore, we also consider to remove
the size param from domain->ops->unmap entirely at some point.

We had a long discussion about it, please see:

https://lkml.org/lkml/2011/10/10/234
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