Enabling HYP seem conceptually easy. >From what I gather it involves initializing the cores one at a time, then touching 16 registers. (something like that) The nv-u-boot does not seem to support saveenv, so might be worthwhile to rebuild with better default env. (known issue) If somebody can get this working I'll be happy to integrate with the f19 remix for chromebook. My experience so far was that the HYP enabled u-boot does not work. Meaning the bootm of the FIT image fails, and also the case of legacy uImages also fail to bootm. regards, -Jon Disnard On Sat, Aug 10, 2013 at 10:12 PM, Jonathan Masters <jcm@xxxxxxxxxx> wrote: > I'll try this out. > > -- > Sent from my iPad > > On Aug 7, 2013, at 12:02, Jon <jdisnard@xxxxxxxxx> wrote: > >> There is a HYP enabled u-boot floating around. >> >> http://www.virtualopensystems.com/media/chromebook/nv_u-boot-snow.kpart >> >> So far I've been unable to get it to boot Fedora, but others are welcome to try. >> >> Here is the git for the above: >> https://github.com/virtualopensystems/u-boot >> >> They also have some documentation: >> https://lists.cs.columbia.edu/pipermail/kvmarm/2013-July/006481.html >> >> Regards, >> >> -Jon Disnard >> fas: parasense >> irc: masta >> >> On Wed, Aug 7, 2013 at 10:51 AM, Peter Robinson <pbrobinson@xxxxxxxxx> wrote: >>> On Wed, Aug 7, 2013 at 4:47 PM, Adam Goode <adam@xxxxxxxxxxxxx> wrote: >>>> Was there ever a resolution to this? I am happy to file a bug in the >>>> chromium tracker to get this looked at, if needed. >>> >>> None that I'm aware of but if you could file a bug in the chromium >>> tracker that would be fab. >>> >>> Peter >>> >>>> Adam >>>> >>>> >>>> On Fri, Jul 5, 2013 at 12:16 PM, Richard W.M. Jones <rjones@xxxxxxxxxx> wrote: >>>>> On Fri, Jul 05, 2013 at 11:30:01AM -0400, Jon Masters wrote: >>>>>> On 07/05/2013 05:07 AM, Richard W.M. Jones wrote: >>>>>>> On Wed, Jul 03, 2013 at 11:59:28AM -0500, Jon wrote: >>>>>>>> I'm pleased to announce the availability of Fedora 19 for the 2012 Samsung >>>>>>>> Chromebook featuring ARM Exynos dual core A15 processor. >>>>>>> >>>>>>> Sorry to slightly hijack this thread. I will try your remix later. >>>>>>> >>>>>>> Reading the comments on https://lwn.net/Articles/557132/#Comments >>>>>>> it seems as if the news on KVM on the Chromebook is not good. It >>>>>>> doesn't boot into HYP mode, and there's no way to make it boot into >>>>>>> HYP mode, so KVM won't be supported. Is that right? >>>>>> >>>>>> That's roughly what I'd expect to be the case. There might be a signed >>>>>> U-Boot someone has hacked that does enable HYP mode, but otherwise I >>>>>> suspect you're out of luck. I'll ask around during Linaro Connect. >>>>> >>>>> I asked about this on #kvm-arm earlier today and got this long reply: >>>>> >>>>> 11:58 < rwmjones> I'm reading a comment here: >>>>> 11:58 < rwmjones> https://lwn.net/Articles/557561/ >>>>> 11:58 < rwmjones> which suggests that KVM on the Samsung Chromebook 2012 (ARM A15 version) isn't possible because the >>>>> bootloader doesn't boot into HYP mode >>>>> 11:58 < rwmjones> is this true? if so is there a way around it? >>>>> 11:59 < pm215> IIRC the bootloader gets control in secure-SVC >>>>> 11:59 < pm215> it is from there possible to get to NS-HYP >>>>> 11:59 < pm215> it's just that the stock bootloader doesn't do this before booting the kernel >>>>> 11:59 < rwmjones> so what's involved in making it work? >>>>> 11:59 < pm215> somebody needs to write some code and get it into the bootloader >>>>> 12:00 < rwmjones> ok, and the bootloader can be replaced (next comment down suggests this requires soldering)? >>>>> 12:01 < pm215> I believe this to be true, though I don't have a chromebook >>>>> 12:01 < pm215> I think you get the google bootloader to chain boot some other bootloader which you do have control of, and then >>>>> that can actually boot your os >>>>> 12:02 < suihkulokki> or maybe we could just prepend some code in front of the kernel zimage that switches to HYP mode? >>>>> 12:02 < pm215> nope >>>>> 12:02 < suihkulokki> damn >>>>> 12:02 < pm215> we spent quite a long time being very firm that the ABI here is "bootloader's job to get this right" >>>>> 12:03 < pm215> there are some u-boot patches currently going through code review to do the go-to-hyp-mode thing properly for >>>>> arndale >>>>> 12:03 < pm215> hopefully if they get upstream it will be more straightforward to say "ok, I have $other-board and it needs to >>>>> do this too" >>>>> 12:05 < apritzel> which would require that the Chromebook u-boot support is upstream as well >>>>> 12:05 < apritzel> AFAIK this is not the case currently >>>>> >>>>> [There's more of this, but that seems to cover the main points] >>>>> >>>>> Reading around this, it does seem as if it's possible to get from >>>>> secure SVC to HYP (although not easy). >>>>> >>>>> Rich. >>>>> >>>>> -- >>>>> Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones >>>>> virt-top is 'top' for virtual machines. Tiny program with many >>>>> powerful monitoring features, net stats, disk stats, logging, etc. >>>>> http://people.redhat.com/~rjones/virt-top >>>>> _______________________________________________ >>>>> arm mailing list >>>>> arm@xxxxxxxxxxxxxxxxxxxxxxx >>>>> https://admin.fedoraproject.org/mailman/listinfo/arm >>>> _______________________________________________ >>>> arm mailing list >>>> arm@xxxxxxxxxxxxxxxxxxxxxxx >>>> https://admin.fedoraproject.org/mailman/listinfo/arm >>> _______________________________________________ >>> arm mailing list >>> arm@xxxxxxxxxxxxxxxxxxxxxxx >>> https://admin.fedoraproject.org/mailman/listinfo/arm >> >> >> >> -- >> >> -Jon >> >> >> -- >> >> -Jon >> _______________________________________________ >> arm mailing list >> arm@xxxxxxxxxxxxxxxxxxxxxxx >> https://admin.fedoraproject.org/mailman/listinfo/arm -- -Jon _______________________________________________ arm mailing list arm@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/arm
