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Re: [Qemu-devel] [PATCH 1/2] pc: add pci64 memory hole
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] [PATCH 1/2] pc: add pci64 memory hole |
Date: |
Wed, 02 May 2012 17:46:48 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.4) Gecko/20120422 Thunderbird/10.0.4 |
On 05/02/12 17:31, Avi Kivity wrote:
> On 05/02/2012 05:02 PM, Gerd Hoffmann wrote:
>> This patch adds a address space hole for 64bit PCI ressources.
>> It starts at 0x8000000000 (512 GB) and ends at 0x10000000000 (1 TB),
>> thus has 512 GB in size. This matches what the seabios is doing
>> (latest master branch).
>
> We should communicate this to seabios via fwcfg
A dsdt entry is needed for the pci64 window (see
http://code.coreboot.org/p/seabios/source/commit/482a020ec25f4cec655ddcb16b67c6f38b0844c0/),
which makes it non-trivial to turn this into a runtime option ...
> It should also only apply to -M old.
Is this the only reason you want this be runtime-switchable?
cheers,
Gerd