On Thu, Apr 28, 2022 at 02:56:50PM +0200, Jinpu Wang wrote: > On Thu, Apr 28, 2022 at 2:32 PM Yang Zhong <yang.zh...@intel.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.zh...@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? > > > > > > > Qemu will replace object with compound key, in that time, Paolo asked me > > to use "-M sgx-epc..." to replace "-object sgx-epc..." from Qemu command > > line. > > > > So the "-M sgx-epc..." will get sgx-epc's parameters from hash key, and > > do not covert sgx-epc to PC or Q35. > > > > SGX is only one Intel cpu feature, and no dedicated SGX Qemu machine type > > for SGX. > > > > Another compound key example: > > "-M pc,smp.cpus=4,smp.cores=1,smp.threads=1" > > > > Yang > ah, ok. thx for the sharing. > so if I specify "-M pc -M sgx-epc.." it will be the explicit way to > choose PC machine type with sgx feature. > and "-M q35 -M sgx-epc.." qemu will use Q35 machine type?
The below command is okay, "-M pc,sgx-epc.." or "-M q35,sgx-epc.." Yang > > > > > > > Thanks! > > > Jinpu
