From: Avi Kivity <avi@redhat.com>
To: "Kumar, Venkat" <Venkat.Kumar@lsi.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: Allocating Extra Memory To Guest
Date: Wed, 06 May 2009 14:12:25 +0300 [thread overview]
Message-ID: <4A017099.20305@redhat.com> (raw)
In-Reply-To: <3D9CB4061D1EB3408D4A0B910433453C030BABAFBC@inbmail01.lsi.com>
Kumar, Venkat wrote:
> Hi,
>
> 1. How should we allocate extra memory to guest other than memory allocated through "qemu_alloc_physram"??
>
qemu_alloc_physram() is obsolete. I've just removed it to avoid
confusion (and a warning).
I presume you want to give kvm memory which is not real RAM - from a
host device?
hw/device-assignment.c does that.
Please clarify what you want to do.
> 2. How to register the extra allocated memory with KVM?
>
cpu_register_physical_memory(), but that has to come from qemu_ram_alloc().
As a hack, you can call qemu_ram_alloc(), and then
mmap(qemu_ram_ptr(ram_offset), ... ) to replace the RAM with device memory.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
next prev parent reply other threads:[~2009-05-06 11:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-06 9:24 Allocating Extra Memory To Guest Kumar, Venkat
2009-05-06 11:12 ` Avi Kivity [this message]
2009-05-06 12:09 ` Kumar, Venkat
2009-05-06 12:24 ` Avi Kivity
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