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

[Jinpu Wang]

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

Do you mean internally QEMU is converting -M sgx-epc to PC or Q35, can
I choose which one to use?

Thanks!
Jinpu