[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH] pcie-root-port: let it has higher migrate prior
From: |
Peter Xu |
Subject: |
Re: [Qemu-devel] [PATCH] pcie-root-port: let it has higher migrate priority |
Date: |
Fri, 2 Feb 2018 18:04:59 +0800 |
User-agent: |
Mutt/1.9.1 (2017-09-22) |
On Thu, Feb 01, 2018 at 10:01:31PM +0200, Marcel Apfelbaum wrote:
[...]
> Root ports can't be nested, anyway, I suppose the migration should
> follow the bus numbering order.
Could I ask whether this is a must? And if yes, why?
>
> The question now is what happens if the migration is happening before
> the guest firmware finishes assigning numbers to buses...
Do you mean that vIOMMU may fetch wrong context entries too?
Note that as long as vIOMMU DMAR is off globally, vIOMMU will not
fetch context entries at all. So IMHO this problem should not happen
during the firmware execution time (assuming that the firmware should
not enable vIOMMU at all).
Thanks,
--
Peter Xu
Re: [Qemu-devel] [PATCH] pcie-root-port: let it has higher migrate priority, Dr. David Alan Gilbert, 2018/02/01
Re: [Qemu-devel] [PATCH] pcie-root-port: let it has higher migrate priority, Peter Xu, 2018/02/02
Re: [Qemu-devel] [PATCH] pcie-root-port: let it has higher migrate priority, Dr. David Alan Gilbert, 2018/02/01