On 18 February 2016 at 20:51, Jean-Christophe DUBOIS <j...@tribudubois.net> wrote: > Le 16/02/2016 22:57, Peter Maydell a écrit : > > On 16 February 2016 at 21:47, Jean-Christophe DUBOIS > <j...@tribudubois.net> wrote: > > In QEMU, other Cortex A9 (Versatilepb.c, Exynos, Zynq ...) are also setting > has_el3 to false ... > > So these generally are the "legacy" platforms which were > added before we ever had EL3 support in QEMU. For them it's hard > to turn the EL3 support on for the board even if in theory > it ought to be on, because we don't know what users are > running on it that we might break. With a new to QEMU board > we have an opportunity to get it right from the start. > > > OK, so is the "highbank" the only Qemu Cortex A9 board supporting > el3 yet?
Yep. We don't have many A9 boards and most of those we do have are in the 'legacy' bucket. > -kernel I would expect to work, though, at least if the > only issue is the interrupt controller setup. It seems > worth investigating why it goes wrong. > > > Well, I can boot uniprocessor (-smp 1) without trouble but if I turn logs on > (guest_errors,unimp) I am getting a lot of > > gic_dist_writeb: Bad offset 38x (a few at startup) > Ignoring attempt to switch CPSR_A flag from non-secure world with > SCR.AW bit clear (a lot) > Ignoring attempt to switch CPSR_F flag from non-secure world with > SCR.FW bit clear (a few) This would only be a problem if your kernel needed to use FIQ, I think. > I am not sure if this is a problem. Do you have some opinion on this? > > When I turn SMP (-smp 2 or more), I am unable to complete the boot. As soon > as my secondary cpu is started QEMU will continue to boot "very slowly" but > doesn't get to the linux user prompt overnight. Does SMP work with EL3 not enabled, or is this a different bug? thanks -- PMM
