From: Stefan Hajnoczi <stefanha@gmail.com>
To: "Xie, Huawei" <huawei.xie@intel.com>
Cc: "rusty@rustcorp.com.au" <rusty@rustcorp.com.au>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] Would virtio support 64 bit address for vring virtqueue?
Date: Wed, 28 Aug 2013 10:07:23 +0200 [thread overview]
Message-ID: <20130828080723.GD4696@stefanha-thinkpad.muc.redhat.com> (raw)
In-Reply-To: <C37D651A908B024F974696C65296B57B01980259@SHSMSX101.ccr.corp.intel.com>
On Wed, Aug 28, 2013 at 03:18:39AM +0000, Xie, Huawei wrote:
> I am developing virtio user space poll mode network driver. We allocate vring physical memory from huge page. On VMs with less than 4GB memory, it works well. But on VMs with like 8GB memory, huge page are all allocated from high end memory.
> So would virtio support 64bit address for vring virtqueue?
The vring takes guest physical addresses and the C type is __u64 (see
/usr/include/linux/virtio_ring.h). 64-bit addresses are fine.
Stefan
next prev parent reply other threads:[~2013-08-28 8:07 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-28 3:18 [Qemu-devel] Would virtio support 64 bit address for vring virtqueue? Xie, Huawei
2013-08-28 8:07 ` Stefan Hajnoczi [this message]
2013-08-28 9:22 ` Xie, Huawei
2013-08-28 11:45 ` Laszlo Ersek
2013-08-28 12:20 ` Christian Borntraeger
2013-08-28 15:30 ` Xie, Huawei
2013-08-28 17:35 ` Anthony Liguori
2013-08-28 21:02 ` H. Peter Anvin
2013-08-28 21:28 ` Anthony Liguori
2013-08-28 21:38 ` Richard Henderson
2013-08-28 10:16 ` Xie, Huawei
2013-09-04 6:52 ` Rusty Russell
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