On Fri, Jun 20, 2014 at 12:38:30PM +0200, Paolo Bonzini wrote: > Il 20/06/2014 11:10, Aurelien Jarno ha scritto: > >> My idea was to add a machines-specific option umkernel=on, and require it > >> in order to run KVM. Later we can add umkernel=on support for TCG as well, > >> while umkernel=off with KVM requires virtualization extensions. > >> > >> The same option can disable pflash boot. > >> > >> What do you think? > > > >For what I understand the current KVM support in MIPS uses trap and > >emulate and thus doesn't need hardware support, just a recent kernel > >with the option enabled. > > Yes, but work to support virtualization extensions is underway. > Patches were posted a few months ago. > > >That's why I do wonder if there is a real point > >in supporting UM kernels in TCG mode. > > Debugging, mainly. It is sometimes useful to compare TCG with KVM > on x86, and I suppose it could be the same on MIPS. Ok, then we can indeed add a umkernel option, which is always enabled with KVM, and which disable the flash (and why not other devices) in that case. At some point it might be a good idea to add a specific machine for emulation/virtualization, like it is done on ARM, which do not have to handle this kind of devices, and which does not have all the current limitations of the Malta board. -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurelien@xxxxxxxxxxx http://www.aurel32.net -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
