On Sat, May 24, 2025 at 07:00:55AM -0400, Chuck Zmudzinski wrote: > On 5/24/2025 3:40 AM, Manuel Bouyer wrote: > > On Fri, May 23, 2025 at 10:06:05PM -0400, Chuck Zmudzinski wrote: > >> On 5/23/2025 5:18 PM, Chuck Zmudzinski wrote: > >> > On 5/23/2025 4:22 PM, Manuel Bouyer wrote: > >> >> On Fri, May 23, 2025 at 04:19:46PM -0400, Chuck Zmudzinski wrote: > >> >>> On 5/23/2025 4:15 PM, Manuel Bouyer wrote: > >> >>> > On Fri, May 23, 2025 at 04:13:01PM -0400, Chuck Zmudzinski wrote: > >> >>> >> [...] > >> >>> >> I needed to acquire a PCI serial card to get some useful messages > >> >>> >> because the motherboard does not have a built-in serial port. > >> >>> >> > >> >>> >> It appears Xen 4.18.4_20241221nb0 from pkgsrc crashes on my box > >> >>> >> before the NetBSD dom0 starts: > >> >>> >> > >> >>> >> -------- snip ------ > >> >>> >> (XEN) Xen call trace: > >> >>> >> (XEN) [<ffff82d040261a00>] R intel_iommu_enable_eim+0/0xe0 > >> >>> >> (XEN) [<ffff82d040268ac4>] S iommu_enable_x2apic+0x24/0x70 > >> >>> >> (XEN) [<ffff82d0403f579d>] S x2apic_bsp_setup+0x12d/0x220 > >> >>> >> (XEN) [<ffff82d0403ff0e4>] S __start_xen+0x1af4/0x2620 > >> >>> >> (XEN) [<ffff82d040204434>] S __high_start+0x94/0xa0 > >> >>> >> (XEN) > >> >>> >> (XEN) > >> >>> >> (XEN) **************************************** > >> >>> >> (XEN) Panic on CPU 0: > >> >>> >> (XEN) CONTROL-FLOW PROTECTION FAULT: #CP[0003] endbranch > >> >>> >> (XEN) **************************************** > >> >>> >> (XEN) > >> >>> >> (XEN) Reboot in five seconds... > >> >>> >> (XEN) Resetting with ACPI MEMORY or I/O RESET_REG. > >> >>> >> -------- end messages ------ > >> >>> > > >> >>> > Do you have a way to disable x2apic in the BIOS ? > >> >>> > >> >>> I can check later this evening but I have an appointment now. > >> >>> > >> >>> > > >> >>> >> > >> >>> >> Please note only the pkgsrc version of Xen crashes. I can boot Xen > >> >>> >> with no problems using Xen packaged by Fedora, AlmaLinux, etc. on > >> >>> >> this box. > >> >>> > > >> >>> > Is it the same Xen version ? > >> >>> > >> >>> More or less - I know Xen 4.18.4 worked, now Fedora is at Xen 4.19. > >> >> > >> >> strange; maybe they had a patch. > >> >> Note that I just updated xen in pkgsrc to 4.18.5 > >> >> > >> > > >> > Actually, I do remember that Xen 4.19.1 from Fedora did not work on my > >> > box but a patch that was added in 4.19.2 fixed it. I see the patch I > >> > needed on the Xen 4.19 branch was not added in Xen 4.18.4 but it is > >> > added in Xen 4.18.5, so maybe it will be fixed in Xen 4.18.5. I will try > >> > it when I can download Xen 4.18.5. > >> > > >> > Thanks. > >> > >> I rebuilt the latest Xen from pkgsrc but no help. Then I searched > >> Google for information about the error I am getting which has to > >> do with Control-flow Enforcement Technology (cet) and tried experimenting > >> with the Xen cet= options. > >> > >> Now I am not getting the crash, but just when it is ready to build the > >> PV Dom0, it complains that it does not have an ELF binary. > >> > >> Note the magic incantation to get past the crash is to add the option > >> cet=no-ibt to the Xen command line. > >> > >> With this configuration, I get: > >> > >> (XEN) Xen version 4.18.5_20250521nb0 (chuckz@) (gcc (nb3 20231008) 10.5.0) > >> debug=n Fri May 23 18:59:50 EDT 2025 > >> (XEN) Latest ChangeSet: > >> (XEN) build-id: 86afac8b52e2d124001208bb6261d17088a2f26f > >> (XEN) Bootloader: NetBSD/x86 EFI Boot (x64), Revision 1.2 (Mon Dec 16 > >> 13:08:11 UTC 2024) (from NetBSD 10.1) > >> (XEN) Command line: dom0_mem=2G com2=9600,8n1,0x40c0,16,1:0.0 console=com2 > >> cet=no-ibt pv-l1tf=false > >> ... snip many messages > >> (XEN) First cpu on runqueue, activating > >> (XEN) Adding cpu 17 to runqueue 2 > >> (XEN) Adding cpu 18 to runqueue 2 > >> (XEN) Adding cpu 19 to runqueue 2 > >> (XEN) mcheck_poll: Machine check polling timer started. > >> (XEN) NX (Execute Disable) protection active > >> (XEN) d0 has maximum 4160 PIRQs > >> (XEN) *** Building a PV Dom0 *** > >> (XEN) ELF: not an ELF binary > >> (XEN) > >> (XEN) **************************************** > >> (XEN) Panic on CPU 0: > >> (XEN) Could not construct domain 0 > >> (XEN) **************************************** > >> (XEN) > >> (XEN) Reboot in five seconds... > >> (XEN) Resetting with ACPI MEMORY or I/O RESET_REG. > >> > >> I tried uncompressing (with gunzip) the netbsd-XEN3_DOM0.gz file, and I > >> tried omitting the dom0_mem setting, but neither change helped. > > > > This one I don't know; what boot loader command are you using ? > > > > menu=Boot normally with Xen:dev hd2d:;rndseed /var/db/entropy-file;load > /netbsd-XEN3_DOM0 console=pc;multiboot /xen.gz dom0_mem=2G > com2=9600,8n1,0x40c0,16,1:0.0 console=com2 cet=no-ibt pv-l1tf=false
I don't have the rndseed entry in my settings; maybe that's the problem BTW, as you're using a serial console you probably want console=com0 for NetBSD -- Manuel Bouyer <bou...@antioche.eu.org> NetBSD: 26 ans d'experience feront toujours la difference --