On Fri, Jul 03, 2020 at 11:37:02AM +0100, Peter Maydell wrote: > On Fri, 3 Jul 2020 at 10:44, Heyi Guo <guoh...@linux.alibaba.com> wrote: > > > > vms->psci_conduit being disabled only means PSCI is not implemented by > > qemu; it doesn't mean PSCI is not supported on this virtual machine. > > Actually vms->psci_conduit is set to disabled when vms->secure and > > firmware_loaded are both set, which means we will run ARM trusted > > firmware, which will definitely provide PSCI. > > > > The issue can be reproduced when running qemu in TCG mode with secure > > enabled, while using ARM trusted firmware + qemu virt UEFI as firmware > > binaries, and we can see secondary cores will not be waken up. > > If you're using a real EL3 guest firmware then it's the job of > the guest firmware to provide a DTB to the guest EL2/EL1 that says > "and I support PSCI" if it supports PSCI, surely? QEMU can't tell > whether the EL3 code does or doesn't do that... > > thanks > -- PMM
I guess this means qemu needs to find this out from firmware? Perhaps through fwcfg ... Don't really know about PSCI specifically, just a general comment from ACPI POV. -- MST
