linux-kernel - Re: Questions about function detect_intel

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Message-ID: <CAPM=9tygxEKvF6Hi8LXTQoHjFwTn3OZ-UmFpj1znGhas=HziMA@mail.gmail.com>
Date:	Mon, 26 Nov 2012 18:25:31 +1000
From:	Dave Airlie <airlied@...il.com>
To:	"Li, Zhen-Hua" <lizhenhua.dev@...il.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Questions about function detect_intel_iommu(void)

On Mon, Nov 26, 2012 at 4:36 PM, Li, Zhen-Hua <lizhenhua.dev@...il.com> wrote:
> Hi all,
>      I am debugging a bug about iommu recently and got a question
> about the function detect_intel_opmmu,  Could anybody kindly help me?
>
>      In dmar.c, this function :
>                 void __init detect_intel_iommu(void)
>      In 2.6.32 and redhat enterprise kernel 2.6.18, it is called by
> x86_64 system . But in kernel 3.5.2, it is only needed on IA64 system.
>
>     And my question is: is this function really needed for x86_64 and
> i386 in 2.6.32?

Not sure why you think its IA64, its called from the iommu init code
in 3.x here.

via the IOMMU_INIT_POST macro
Dave.
>
>
> Thanks and Regards.
>
> Li, Zhen-Hua
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