On Fri, Mar 21, 2014 at 10:20 PM, Christoffer Dall <christoffer.dall@xxxxxxxxxx> wrote: > Does anyone have anything they would like to discuss on a KVM/ARM Call > on Tuesday? I don't know if this warrants a call, but Peter Maydell had raised an issue about the smc vs. hvc calling convention for PSCI. The usecase is doing migration between a KVM guest and QEMU TCG (system emulation on x86). Seems a bit crazy to me, but people are trying to do this. The OS will pick the smc/hvc call method from DT based on whichever environment it boots on, but then after migration will be using the "wrong" call method. Knowing little about KVM internals, the solution I see here is for KVM to support PSCI calls using smc. This will also mean we don't have a different DT for virt machine model depending on KVM vs. TCG. Another approach would be the TCG PSCI emulation (which I'm implementing) could trap and handle hvc calls instead, but I don't recall if the architecture can support that as easily. Rob _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
