On 18/02/20 15:44, Vitaly Kuznetsov wrote: > Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > --- > RFC: This is somewhat similar to eVMCS breakage and it is likely possible > to fix this in KVM. I decided to try QEMU first as this is a single > control and unlike eVMCS we don't need to keep a list of things to disable. I think you should disable "virtual-interrupt delivery" instead (which in turn requires "process posted interrupts" to be zero). That is the one that is incompatible with AutoEOI interrupts. The ugly part about fixing this in QEMU is that in theory it would be still possible to emulate virtual interrupt delivery and posted interrupts, because they operate on a completely disjoint APIC configuration than the host's. I'm not sure we want to go there though, so I'm thinking that again a KVM implementation is better. It acknowledges that this is just a limitation (workaround for a bug) in KVM. Paolo
