On 1 September 2014 23:41, Peter Crosthwaite <[email protected]> wrote: > On Tue, Sep 2, 2014 at 3:15 AM, Peter Maydell <[email protected]> > wrote: >> On 19 August 2014 01:54, Peter Crosthwaite <[email protected]> >> wrote: >>> Linux should boot in EL2 or EL1. If in EL3, jump down before handing >>> off to Linux. >>> >>> Signed-off-by: Peter Crosthwaite <[email protected]> >> >> The other way we could do this would be to have the >> do_cpu_reset() hook put the CPU into EL2 or EL1 before >> starting the boot code. (This would be in line with how it >> would work for KVM). >> > > Tried that at first, and the problem we found was it introduced a > reset order dep. The arm-boot and CPU race on who sets the EL.
Surely there's already a reset order dependency, because both the arm-boot reset hook and CPU reset proper want to initialise the PC ? >> Have you thought about how this would work for >> secondary CPUs (which boot via PSCI poweron)? > Not yet although I expect something similar. Hmm. I guess PSCI poweron won't even go through the boot.c code, thinking a bit more about it. I need to look at the TCG PSCI patches too. -- PMM
