From: Jes Sorensen <Jes.Sorensen@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Anthony Liguori <aliguori@us.ibm.com>,
KVM General <kvm@vger.kernel.org>, Alexander Graf <agraf@suse.de>,
QEMU Developers <qemu-devel@nongnu.org>,
Kevin O'Connor <kevin@koconnor.net>, Avi Kivity <avi@redhat.com>
Subject: [Qemu-devel] Re: [PATCH] QEMU - provide e820 reserve through qemu_cfg
Date: Mon, 25 Jan 2010 22:05:00 +0100 [thread overview]
Message-ID: <4B5E077C.2040602@redhat.com> (raw)
In-Reply-To: <4B5DFBA7.9080100@codemonkey.ws>
On 01/25/10 21:14, Anthony Liguori wrote:
> On 01/25/2010 02:04 PM, Alexander Graf wrote:
>> Yes, sounds good. Should be fairly extensible then. What about memory
>> holes? Do we need to take care of them?
>
> It would be nice for QEMU to be able to add additional e820 regions that
> don't necessarily fit the standard layout model.
>
> For instance, I've thought a number of times about using a large
> reserved region as a shared memory mechanism.
>
> But we certainly need to allow the BIOS to define the regions it needs
> to know about.
I think it should be easy to accommodate using the scheme I am
suggesting. It would require some basic testing for conflicts in the
BIOS, but otherwise it should pretty much allow you to specify any
region you want as a reserved block.
Only problem is that we don't really have a way to pass back info
saying 'you messed up trying to pinch an area that the BIOS wants
for itself'.
I'll take a look at it.
Cheers,
Jes
next prev parent reply other threads:[~2010-01-25 21:05 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-25 16:46 [Qemu-devel] [PATCH] Seabios - read e820 reserve from qemu_cfg Jes Sorensen
2010-01-25 16:49 ` [Qemu-devel] [PATCH] QEMU-KVM - provide e820 reserve through qemu_cfg Jes Sorensen
2010-01-25 16:52 ` [Qemu-devel] [PATCH] QEMU " Jes Sorensen
2010-01-25 16:58 ` [Qemu-devel] " Alexander Graf
2010-01-25 17:13 ` Jes Sorensen
2010-01-25 17:28 ` Alexander Graf
2010-01-25 17:46 ` Jes Sorensen
2010-01-25 20:04 ` Alexander Graf
2010-01-25 20:14 ` Anthony Liguori
2010-01-25 21:05 ` Jes Sorensen [this message]
2010-01-25 21:08 ` Alexander Graf
2010-01-25 21:24 ` Jes Sorensen
2010-01-26 6:46 ` Gleb Natapov
2010-01-26 8:36 ` Jes Sorensen
2010-01-26 0:24 ` [Qemu-devel] Re: [PATCH] Seabios - read e820 reserve from qemu_cfg Kevin O'Connor
2010-01-26 21:52 ` [Qemu-devel] [PATCH] Seabios - read e820 table " Jes Sorensen
2010-01-26 21:53 ` [Qemu-devel] [PATCH] QEMU-KVM - provide e820 table via fw_cfg Jes Sorensen
2010-01-26 21:55 ` [Qemu-devel] " Alexander Graf
2010-01-28 4:39 ` [Qemu-devel] Re: [PATCH] Seabios - read e820 table from qemu_cfg Kevin O'Connor
2010-01-29 9:03 ` Jes Sorensen
2010-01-29 16:08 ` Gleb Natapov
2010-01-30 3:35 ` Kevin O'Connor
2010-02-08 10:31 ` Jes Sorensen
2010-02-14 3:16 ` Kevin O'Connor
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