On Fri, Feb 12, 2016 at 02:44:20PM +0100, Andrew Jones wrote: > On Fri, Feb 12, 2016 at 11:57:51AM +0100, Andrew Jones wrote: > > On Fri, Feb 12, 2016 at 11:31:32AM +0100, Laurent Vivier wrote: > > > I have nothing at all. It hangs. > > > > Damn. I'll need to get a machine where the problems reproduce to debug. > > I got a machine, an lpar, so using kvm_pr. I immediately hit a problem. > Hung, no output. I was hitting the assert you found earlier, due to > assuming a single memory region. The lack of output and rtas-poweroff were > due to 'sc 1' being broken on this machine. I can fix that by patching > like SLOF does, see [*]. Although I'm not 100% sure how I want to approach > it yet. I'm guessing your test machine was a PowerVM LPAR rather than a KVM LPAR. If you can find a KVM LPAR (IBM host or RHEV host, doesn't matter) things should work better. KVM includes a hack for this situation: an sc 1 coming from guest usermode is redirected to the guest kernel, instead of immediately returning H_PRIVILEGE, which allows the L0 guest / L1 host's kvm_pr to handle it. > There are enough things to fix now that I should probably spin another > version before you bother retesting on the PowerMac. I'll pull something > together soon. > > Thanks, > drew > > [*] http://git.qemu-project.org/?p=SLOF.git;a=patch;h=dd53579ae82bed0654dd3e4b3052ef2cac58b5f4 > -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson
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