On Mon, Aug 14, 2017 at 8:47 AM, Michal Simek <michal.simek@xxxxxxxxxx> wrote: > On 11.8.2017 15:54, Edgar E. Iglesias wrote: >> On Fri, Aug 11, 2017 at 02:58:03PM +0200, Michal Simek wrote: >>> Hi Rob, +Edgar, >>> >>> On 10.8.2017 21:10, Rob Herring wrote: >>>> On Fri, Aug 04, 2017 at 03:45:30PM +0200, Michal Simek wrote: >>>>> From: Soren Brinkmann <soren.brinkmann@xxxxxxxxxx> >>>>> >>>>> Document the DT bindings for the Zynq UltraScale+ PM Firmware. [...] >>>>> + - method: The method of calling the PM-API firmware layer. >>>>> + Permitted values are: >>>>> + - "smc" : To be used in configurations without a hypervisor >>>>> + - "hvc" : To be used when hypervisor is present >>>> >>>> Do you really use both? >>>> >>> >>> SMCs definitely yes. >>> >>> Interface was designed in that way and I don't know if people are using >>> it or not. >>> >>> Not sure if Xen is blocking SMCs. I know we have discussed it but not >>> sure if this is enabled by default or only for certain configurations. >>> Also not sure if xen contains handler for hvc. >>> Edgar: Do you know? >> >> We have patches for Xen that implement a power-management mediator. >> That implementation handles PM calls over both SMC and HVC insns. >> Patches are on the Xen mailing list. >> >> Other hypervisors may work differently. >> >> I think we should support both but I don't have a strong opinion on it. > > Rob: Are you ok with having it there? Yes. Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
