Re: [libvirt] [PATCH 0/2] Avoid issues due to qemu dropping osxsave and ospke

On Thu, May 9, 2019 at 7:43 PM Daniel Henrique Barboza <danielhb413(a)gmail.com&gt; wrote: > > This is a VM with 'osxsave' capability declared, when there is no > 'osxsave' guest support, using this series on top of current master: > > > $ sudo ./run tools/virsh start ub1810-osxsave > error: Failed to start domain ub1810-osxsave > error: internal error: process exited while connecting to monitor: 2019-05-09T17:10:41.077568Z qemu-system-x86_64: can't apply global Skylake-Client-IBRS-x86_64-cpu.osxsave=off: Property '.osxsave' not found > > > Applying this series makes the VM boot up, as intended. > > I believe there is room for discussion whether the VM should boot > up or fail to boot with a "feature not found" error like the case below, > in a sense of "you can't disable a feature that does not exist": > > <feature policy='disable' name='not_a_cap'/> > > $ sudo ./run tools/virsh start ub1810-unknown-cap > error: Failed to start domain ub1810-unknown-cap > error: unsupported configuration: unknown CPU feature: not_a_cap > > But the alternative presented in this series does the trick and it's > less annoying for existing VMs. > > > For all the patch series: > > > Reviewed-by: Daniel Henrique Barboza <danielhb413(a)gmail.com&gt; > Tested-by: Daniel Henrique Barboza <danielhb413(a)gmail.com&gt; Thank you so much Daniel! Anyone else to chime in?