On Fri, 23 Oct 2015 08:56:26 +0200
Gerd Hoffmann wrote:
> Hi,
>
> > One complication I thought of was that it might be tricky to deal
> > with the implications of allowing this DMA to specify any old
> > address to fill with fw_cfg data.
> >
> > So, for example, since Red Hat is working on SM
On 23/10/2015 08:56, Gerd Hoffmann wrote:
>> >
>> > So, for example, since Red Hat is working on SMM. Would a DMA to SMRAM
>> > be protected?
>> >
>> > I haven't watched the fw_cfg DMA discussion too closely, but has this
>> > been thought about?
> Yes. That problem isn't new and it isn't spec
Hi,
> One complication I thought of was that it might be tricky to deal with
> the implications of allowing this DMA to specify any old address to
> fill with fw_cfg data.
>
> So, for example, since Red Hat is working on SMM. Would a DMA to SMRAM
> be protected?
>
> I haven't watched the fw_cf
Back when I was looking at fw_cfg support for -kernel in OVMF, I noted
that it took a while to read the kernel. We improved the perf
substantially by using a 'rep insb' instruction, which I think kvm
special cases to minimize VM traps.
Nevertheless, I thought that it would be good to implement a D
