On Fri, Mar 03, 2023 at 09:54:47AM +0000, Suzuki K Poulose wrote: > On 03/03/2023 09:46, Jean-Philippe Brucker wrote: > > On Thu, Mar 02, 2023 at 07:12:24AM +0900, Itaru Kitayama wrote: > > > > > I've tried your series in Real on CCA Host, but the KVM arch init > > > > > emits an Invalid argument error and terminates. > > > > This was the KVM_SET_ONE_REG for the SVE vector size. During my tests I > > didn't enable SVE in the host but shrinkwrap enables more options. > > Does the Qemu check for SVE capability on /dev/kvm ? For kvmtool, we > changed to using the VM instance and that would prevent using SVE, > until the RMM supports it. Yes, QEMU does check the SVE cap on /dev/kvm. I can propose changing it or complementing it with a VM check in my next version, it seems to work (though I need to double-check the VM fd lifetime). Same goes for KVM_CAP_STEAL_TIME, which I need to disable explicitly at the moment. Thanks, Jean > > Suzuki > > > > > Until we figure out support for SVE, disable it on the QEMU command-line > > (similarly to '--disable-sve' needed for kvmtool boot): > > > > -cpu host,sve=off > > > > Thanks, > > Jean > >
