These are features we don't support or advertise to the guest so can
safely be trapped.
Sponsored by: Arm Ltd
Details
Details
- Reviewers
manu - Group Reviewers
arm64 - Commits
- rGf579cc44981b: arm64/vmm: Add missing debug traps
rGc67ea2707d2b: arm64/vmm: Add missing debug traps
Diff Detail
Diff Detail
- Repository
- rG FreeBSD src repository
- Lint
Lint Not Applicable - Unit
Tests Not Applicable
Event Timeline
Comment Actions
This commit (https://cgit.freebsd.org/src/commit/?id=c67ea2707d2b5e6deb5986710f520ff69e4f78a3) seems to break bhyve on an Ampere Altra Mt Collins server that I've been using to do CI testing on arm64:
U-Boot 2024.07 (Sep 05 2025 - 17:07:03 +0000)
DRAM: 4 GiB
Core: 10 devices, 7 uclasses, devicetree: board
MMC:
Loading Environment from nowhere... OK
In: serial@10000
Out: serial@10000
Err: serial@10000
Net: No ethernet found.
Hit any key to stop autoboot: 0
Device 0: 1af4 VirtIO Block Device
Type: Hard Disk
Capacity: 6144.0 MB = 6.0 GB (12582912 x 512)
... is now current device
Scanning virtio 0:1...
Booting: virtio 0
Consoles: EFI console
Reading loader env vars from /efi/freebsd/loader.env
Setting currdev to disk0p1:
FreeBSD/arm64 EFI loader, Revision 3.0
(Thu Oct 2 22:31:59 CEST 2025 root@ampere)
Command line arguments: loader.efi
Image base: 0x1fe97b000
EFI version: 2.100
EFI Firmware: Das U-Boot (rev 8228.1792)
Console: efi,comconsole (0)
Load Path: /\EFI\BOOT\BOOTAA64.EFI
Load Device: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,0000000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,5500000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,8500000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,1600850000000000)/HD(1,GPT,8042
1bee-9fd3-11f0-067b-ff9d86f8dced,0x22,0x10418)
BootCurrent: 0000
BootOrder: 0000[*] 0001 0002 0003 0004 0005
BootInfo Path: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,0000000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,5500000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,8500000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,1600850000000000)
Ignoring Boot0000: Only one DP found
Trying ESP: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,0000000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,5500000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,8500000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,1600850000000000)/HD(1,GPT,80421bee
-9fd3-11f0-067b-ff9d86f8dced,0x22,0x10418)
Setting currdev to disk0p1:
Trying: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,0000000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,5500000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,8500000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,1600850000000000)/HD(2,GPT,80421c02-9fd
3-11f0-1d08-61407e6af4da,0x1043a,0x80000)
Setting currdev to disk0p2:
Trying: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,0000000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,5500000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,8500000000000000)/VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b,1600850000000000)/HD(3,GPT,80421c0c-9fd
3-11f0-17a5-d14fff7c5968,0x9043a,0xa00000)
Setting currdev to disk0p3:
Loading /boot/defaults/loader.conf
Loading /boot/defaults/loader.conf
Loading /boot/device.hints
Loading /boot/loader.conf
Loading /boot/loader.conf.local
/
cLoading kernel...
/boot/kernel/kernel text=0x318 text=0x9cdaa8 text=0x2e0300 data=0x181cf0 data=0x0+0x377000 0x8+0x174408+0x8+0x1a6a79/
Loading configured modules...
/etc/hostid size=0x25
/boot/entropy size=0x1000
Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
Using DTB provided by EFI at 0x1feb1f000.
Loading splash ok
---<<BOOT>>---
Unhandled register access: pc 0xffff00000089144c syndrome 0x280500 reg 8
Abort trapAre you able to reproduce this? I can confirm that the previous commit in the stack, https://cgit.freebsd.org/src/commit/?id=4aa762f3cb97402f0345ce5112c47a303dd4107d, works just fine.
Comment Actions
Yes, it boots successfully with those two commits applied, thanks! Please update PR 290044 once they land.