From: David Woodhouse <dwmw2@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Don Dutile <ddutile@redhat.com>,
iommu@lists.linux-foundation.org, mingo@elte.hu,
linux-kernel@vger.kernel.org, chrisw@redhat.com,
suresh.b.siddha@intel.com
Subject: Re: [PATCH 2/2] iommu: dmar -- reserve mmio space used by IOMMU
Date: Wed, 06 Jun 2012 09:45:29 +0100 [thread overview]
Message-ID: <1338972329.26785.34.camel@shinybook.infradead.org> (raw)
In-Reply-To: <20120606082900.GF5991@gmail.com>
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On Wed, 2012-06-06 at 10:29 +0200, Ingo Molnar wrote:
> So for all practical purposes we get 99% of the warning power
> without going into chicken-and-egg problems like how do we
> determine that there's an IOMMU area there if there's no IOMMU
> aware code in the kernel, right?
That's not a chicken-and-egg problem. It's hardly difficult to see the
DMAR ACPI table and take a *basic* look at the DRHD entries. You don't
even need to fully parse it.
Doing it even without *ACPI* in your kernel would be a different
matter :)
--
dwmw2
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next prev parent reply other threads:[~2012-06-06 8:45 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-04 21:29 [PATCH 0/2]intel-iommu: reserve IOMMU register space Donald Dutile
2012-06-04 21:29 ` [PATCH 1/2] iommu: dmar: replace printks with appropriate pr_*() Donald Dutile
2012-06-04 22:15 ` Joe Perches
2012-06-04 22:28 ` Don Dutile
2012-06-08 14:55 ` [tip:core/iommu] iommu/dmar: Replace printks with appropriate pr_* () tip-bot for Donald Dutile
2012-06-04 21:29 ` [PATCH 2/2] iommu: dmar -- reserve mmio space used by IOMMU Donald Dutile
2012-06-04 22:37 ` David Woodhouse
2012-06-04 23:09 ` Don Dutile
2012-06-04 23:23 ` David Woodhouse
2012-06-04 23:52 ` Don Dutile
2012-06-06 8:16 ` Ingo Molnar
2012-06-06 8:26 ` David Woodhouse
2012-06-06 8:29 ` Ingo Molnar
2012-06-06 8:45 ` David Woodhouse [this message]
2012-06-06 23:56 ` Chris Wright
2012-06-06 23:58 ` Chris Wright
2012-06-08 14:56 ` [tip:core/iommu] iommu/dmar: Reserve mmio space used by the IOMMU, if the BIOS forgets to tip-bot for Donald Dutile
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