On 30.11.2012 15:48, Marc Zyngier wrote: > On 30/11/12 14:35, Peter Maydell wrote: >> On 30 November 2012 09:31, Claudio Fontana <Claudio.Fontana@xxxxxxxxxx> wrote: >>> all the handlers are already there in coproc_a15.c, but the traps >>> are not enabled at world switch in __kvm_vcpu_run. >>> In particular this was noticed because the guests were trying to >>> read the number of CPUs using l2ctlr, and the number of physical >>> host CPUs was returned instead of the number of VCPUs. >> >> L2CTLR should be trapped via HCR.TIDCP, not the HSTR. >> Traps for whole swathes of the coprocessor space via HSTR >> should be avoided unless absolutely necessary; the functionally >> grouped traps in HCR are much better. >> >> (In fact I thought we already did this? Marc?) > > We already have HCR_TIDCP set in HCR, which should be enough (see ARM > ARM B1.14.3). > > You should definitely see L2CTLR accesses being trapped with this > configuration. What is your hardware? > > Thanks, > > M. Sorry for the late response, I had some email issues. I am using Fast Models Model Shell 7.1.44 (Jul 3 2012) I tested again, and it does not trap on the fast models. So I guess it's a fast models issue then. Thanks, Claudio Fontana _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
