linux-kernel - Re: [PATCH] x86/PCI: setup data may be in highmem

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Message-ID: <519E9C4C.3080305@zytor.com>
Date:	Thu, 23 May 2013 15:46:36 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matt Fleming <matt@...sole-pimps.org>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	Matt Fleming <matt.fleming@...el.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Seth Forshee <seth.forshee@...onical.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>, stable@...r.kernel.org
Subject: Re: [PATCH] x86/PCI: setup data may be in highmem

On 05/22/2013 02:43 AM, Matt Fleming wrote:
> From: Matt Fleming <matt.fleming@...el.com>
> 
> pcibios_add_device() assumes that the physical addresses stored in
> setup_data are accessible via the direct kernel mapping, and that
> calling phys_to_virt() is valid. This isn't guaranteed to be true on x86
> where the direct mapping range is much smaller than on x86-64.
> 
> Calling phys_to_virt() on a highmem address results in the following,
> 

Bjorn: yours or mine?

	-hpa


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