On 13.08.2013, at 14:03, Peter Maydell wrote: > This patch series adds a 'virt' platform which uses the > kernel's mach-virt (fully device-tree driven) support > to create a simple minimalist platform intended for > use for KVM VM guests. It's based on John Rigby's > patches, but I've overhauled it a lot: > > * renamed user-facing machine to just "virt" > * removed the A9 support (it can't work since the A9 has no > generic timers) > * added virtio-mmio transports instead of random set of 'soc' devices > * instead of updating io_base as we step through adding devices, > define a memory map with an array (similar to vexpress) > * folded in some minor fixes from John's aarch64-support patch > * rather than explicitly doing endian-swapping on FDT cells, > use fdt APIs that let us just pass in host-endian values > and let the fdt layer take care of the swapping > * miscellaneous minor code cleanups and style fixes > > If you want to test this with TCG QEMU you'll also need the > generic-timers implementation patches I posted recently. > A branch with generic-timers plus these patches is here: > https://git.linaro.org/gitweb?p=people/pmaydell/qemu-arm.git;a=shortlog;h=refs/heads/mach-virt > > (The kernel in pure mach-virt mode requires generic timers; > it can't deal with getting its clock source from an sp804 > timer specified by the device tree. This might be fixed in > a future kernel, but dropping all the soc-device support > from mach-virt makes it simpler anyway.) > > An obvious thing this machine does not provide is a serial > port. I would rather just use virtio-console (and we > should implement the 'emergency console/earlyprintk' bit of > the virtio spec). Are you sure about this? Not implementing a UART / something more standardized has been an absolute nightmare on s390. Device names diverge, so distributions get confused and there's this nasty bug somewhere in virtio-console that makes your input lag when you enter a lot of data quickly on the port. I would really prefer to just define a UART for this machine. It will make life a lot easier. Alex _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
