On Thu, Jun 15, 2017 at 06:57:30PM +0100, Mark Cave-Ayland wrote: > On 15/06/17 16:43, Pasha Tatashin wrote: > > > I have not used qemu for SPARC, so I am not fully aware of its > > capability. The changes in this work touched three types of CPUs: > > The default CPU in QEMU for sun4u is the TI UltraSparc IIi, and the > device tree is roughly similar to that of an Ultra 5, or it least it > will be soon when I've finished working on my latest round of patches. > > Currently I'm booting one of John Paul Adrian Glaubitz's Debian 9 images > and the timestamps stay at 0 until the clock is initialised so I'd hope > that these patches would fix that. Do they require any PROM support at all? > > > 1. UltraSPARC IIe (Hummingbird) > > - %stick is in I/O space, need at least to loads to get upper > > and lower part of stick value. > > 2. Spitfire > > - Use %tick and cpu frequency to determine that clock. This is > > what you tested with TI UltraSparc IIi > > So this is the path I'd expect to be exercised under QEMU. > > > 3. All other > > - use %stick register and stick-frequency values. This is what > > you tested with Fujitsu Sparc64 IV (which by the way is still > > sun4u, I do not think qemu supports sun4v emulation) > > Sure it does. As of the latest 2.9 release, QEMU includes niagara > support out of the box - see http://wiki.qemu.org/SPARC for the latest Do you have information on how to boot the Linux kernel for -M niagara (assuming that is possible) ? Directions for Solaris and HelenOS don't help much for the uninitiated :-(. Thanks, Guenter > updates and > http://tyom.blogspot.co.uk/2016/10/qemu-sun4vniagara-target-went-public.html > for more sun4v detail. > > Disclaimer: I'm one of the QEMU SPARC maintainers. > > > ATB, > > Mark. > -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
