Re: RFC: sgx-epc is not listed in machine type help

[Jinpu Wang]

Hi Daniel,

On Thu, Apr 28, 2022 at 2:33 PM Daniel P. Berrangé <berrange@redhat.com> wrote:
>
> On Thu, Apr 28, 2022 at 02:18:54PM +0200, Jinpu Wang wrote:
> > On Thu, Apr 28, 2022 at 2:05 PM Yang Zhong <yang.zhong@intel.com> wrote:
> > >
> > > On Thu, Apr 28, 2022 at 01:59:33PM +0200, Jinpu Wang wrote:
> > > > Hi Yang, hi Paolo,
> > > >
> > > > We noticed sgx-epc machine type is not listed in the output of
> > > > "qemu-system-x86_64 -M ?",
> > snip
> > > >
> > > >
> > > > I think this would cause confusion to users, is there a reason behind 
> > > > this?
> > > >
> > >
> > >   No specific machine type for SGX, and SGX is only supported in Qemu PC 
> > > and Q35 platform.
> > Hi Yang,
> >
> > Thanks for your quick reply. Sorry for the stupid question.
> > The information I've got from intel or the help sample from
> > https://www.qemu.org/docs/master/system/i386/sgx.html, We need to
> > specify commands something like this to run SGX-EPC guest:
> > qemu-system-x86-64 -m 2G -nographic -enable-kvm -cpu
> > host,+sgx-provisionkey  -object
> > memory-backend-epc,id=mem1,size=512M,prealloc=on -M
> > sgx-epc.0.memdev=mem1,sgx-epc.0.node=0 /tmp/volume-name.img
>
> That isn't an sgx-epc machine type.
>
> That is an (implicit) i440fx  machine type, with an sgx-epc.0.memdev
> property being set.
>
>
> With regards,
> Daniel
Thanks for your reply, I have better understanding now.
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