From: Avi Kivity <avi@redhat.com>
To: Cristi Magherusan <Cristi.Magherusan@net.utcluj.ro>
Cc: kvm@vger.kernel.org
Subject: Re: Custom BIOS supported size
Date: Mon, 04 May 2009 17:31:43 +0300 [thread overview]
Message-ID: <49FEFC4F.4090109@redhat.com> (raw)
In-Reply-To: <1241446175.30017.35.camel@hyperion>
Cristi Magherusan wrote:
> On Mon, 2009-05-04 at 16:48 +0300, Avi Kivity wrote:
>
>> Cristi Magherusan wrote:
>>
>>> Hello,
>>>
>>> Which is the maximum size supported for a custom BIOS image(eg.
>>> coreboot-based)? I tried some 256K coreboot BIOS images and seemed to
>>> work fine, but it blowed up with a 3MB image (which by the way works on
>>> qemu just fine).
>>>
>>>
>> 256K is the maximum with kvm. It can easily be increased, but we need a
>> small kernel change on Intel to store the real-mode TSS.
>>
>>
>>
> Hi Avi,
>
> Thanks for your answer. What would be the upper bound up to which we can
> extend it? May I somehow help in getting this done?
>
I don't know all the places; check the setup code in hw/pc.c. Also look
at the call to KVM_SET_TSS_ADDR and move it somewhere where it won't
clash (right now it's at 4GB-256K).
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
prev parent reply other threads:[~2009-05-04 14:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-03 21:08 Custom BIOS supported size Cristi Magherusan
2009-05-04 13:48 ` Avi Kivity
2009-05-04 14:09 ` Cristi Magherusan
2009-05-04 14:31 ` Avi Kivity [this message]
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