> -----Original Message----- > From: Julien Grall [mailto:julien.gr...@arm.com] > Sent: 04 September 2018 12:22 > To: Shameerali Kolothum Thodi <shameerali.kolothum.th...@huawei.com>; > xen-de...@lists.xen.org > Cc: sstabell...@kernel.org; Linuxarm <linux...@huawei.com>; Andre > Przywara <andre.przyw...@arm.com> > Subject: Re: Xen Dom0 boot failure on platform that supports ARM GICv4
[...] > >> I may have an idea what is happening. As we populate more regions than > >> necessary, it is possible that Linux is trying to access them. Would it > >> be possible to add some debug in the Linux function gic_iterate_rdists > >> to know what the kernel is trying to read? > > > > Ok, enabled earlycon for Dom0. Please find the log below, > > Thank you for the log. I now have an idea what's is going wrong. The function > gic_iterate_rdists can be used to go through all the re-distributor (for > instance > to check whether vLPIs is available). > > Because some of the regions are empty (i.e not emulated), you end up to trap. > Your > patch solves the problem by making regions not empty in the case of GICv4. But > I > think this can also happen when the number of vCPUs for Dom0 get restricted. Yes, that’s right. I didn’t consider that. > Can you have a try at the patch below? I haven't tested on ACPI. > > If that works for you, I will add the DT case, clean it up and send it. Thanks for the patch. It works. Please CC me when you send the revised one, I can retest and provide T-by. Cheers, Shameer _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
