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Re: [Qemu-devel] [PATCH] add 40-48 bit RAM range to seabios
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From: |
H. Peter Anvin |
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Subject: |
Re: [Qemu-devel] [PATCH] add 40-48 bit RAM range to seabios |
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Date: |
Fri, 17 Sep 2010 11:49:05 -0700 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100907 Fedora/3.1.3-1.fc13 Thunderbird/3.1.3 |
On 09/17/2010 06:11 AM, Kevin O'Connor wrote:
> On Fri, Sep 17, 2010 at 07:53:12AM -0500, Anthony Liguori wrote:
>> On 09/16/2010 08:47 PM, Kevin O'Connor wrote:
>>> On Wed, Sep 15, 2010 at 07:15:28PM +0200, Andrea Arcangeli wrote:
>>>> This uses a new cmos port at 0x5e that shall read zero to be backwards
>>>> compatible.
>>> It looks okay to me. Can you provide an Acked-by from one of the qemu
>>> or kvm maintainers?
>>
>> Is CMOS the best place to communicate this (as opposed to fw_cfg)?
>>
>> I know we currently expose memory size via CMOS but perhaps it's
>> better to switch to a 64-bit fw_cfg value.
>
> I'd personally prefer fw_cfg.
>
> Also, another possibility would be to stop sending an absolute max and
> to instead send a map of memory. The latter would allow for
> non-contiguous memory.
>
That would be highly useful for testing purposes.
-hpa