Il 06/12/2013 23:36, Alex Williamson ha scritto: >>> > > #define VFIO_ALLOW_MMAP 1 >>> > > #define VFIO_ALLOW_KVM_INTX 1 >>> > > +#define VFIO_ALLOW_KVM_MSI 1 >>> > > +#define VFIO_ALLOW_KVM_MSIX 1 >> > >> > Why not make these device properties instead? > Honestly, I don't think they're that useful to the average or even to > the advanced user. Each of these disables an acceleration/bypass path > and gives more logging output when debug is enabled. Otherwise we don't > get debugging to see when mmap'd BARs are accessed and we can't tell > when interrupts happen relative to other accesses. For instance it was > pretty obvious to find the Nvidia MSI ACK when seeing a config space > write immediately following an MSI injection. Without debugging > enabled, these just slow things down and I don't know of any cases where > a device behaves better with these features disabled.
Yeah, behaving better is unlikely. I was thinking of them as a debugging features. As to debug messages, have you considered replacing them with tracepoints? Paolo
