...
resetting ...
System reset not supported on this platform
### ERROR ### Please RESET the board ###
Root Cause
Looking at the faulting address TVAL: 00000000ff739f90, this is in the range reserved for PCIe passthru, it should be be accessed here.
In u-boot, it reads only one range to setup ram_base/size:
This is the output, see 'Ram top' which is limited to 4GB:
fdtdec_setup_mem_size_base: Initial DRAM size 140000000
initcall: 00000000802168ba
Monitor len: 000C7CD0
Ram size: 140000000
Ram top: FFFFFFFF
So u-boot should not use the 4G-1 as ram top without any checking, the solution could be doing the check first.
Testing
With the attached u-boot and patched qemu for PCIe passthru, here is the test result, and the OS will bootup successfully.
qemu-system-riscv64 -machine virt -nographic -m 3G -smp 4 \
-bios /usr/lib/riscv64-linux-gnu/opensbi/generic/fw_jump.elf \
-kernel /home/wufei/nvme/u-boot/u-boot.bin \
-device vfio-pci,host=01:00.0 -device vfio-pci,host=01:00.1 \
-drive file=ubuntu-22.04.1-preinstalled-server-riscv64+unmatched.img,if=virtio,format=raw
U-Boot 2023.10-rc1-00323-gb1a8ef746f-dirty (Aug 08 2023 - 16:59:13 +0800)
CPU:
rv64imafdch_zicbom_zicboz_zicsr_zifencei_zihintpause_zawrs_zfa_zca_zcd_zba_zbb_zbc_zbs_sstc_svadu
Model: riscv-virtio,qemu
DRAM: 1 GiB (effective 3 GiB)
Core: 22 devices, 10 uclasses, devicetree: board
Flash: 32 MiB
Loading Environment from nowhere... OK
In: serial,usbkbd
Out: serial,vidconsole
Err: serial,vidconsole
No working controllers found
Net: No ethernet found.
Working FDT set to bef21340
Hit any key to stop autoboot: 0
=> bdinfo
boot_params = 0x0000000000000000
DRAM bank = 0x0000000000000000
-> start = 0x0000000100000000
-> size = 0x0000000080000000
DRAM bank = 0x0000000000000001
-> start = 0x0000000080000000
-> size = 0x0000000040000000
flashstart = 0x0000000020000000
flashsize = 0x0000000002000000
flashoffset = 0x0000000000000000
baudrate = 115200 bps
relocaddr = 0x00000000bf743000
reloc off = 0x000000003f543000
Build = 64-bit
current eth = unknown
eth-1addr = (not set)
IP addr = <NULL>
fdt_blob = 0x00000000bef21340
new_fdt = 0x00000000bef21340
fdt_size = 0x0000000000001a80
lmb_dump_all:
memory.cnt = 0x2 / max = 0x10
memory[0] [0x80000000-0xbfffffff], 0x40000000 bytes flags: 0
memory[1] [0x100000000-0x17fffffff], 0x80000000 bytes flags: 0
reserved.cnt = 0x4 / max = 0x10
reserved[0] [0x80000000-0x8007ffff], 0x00080000 bytes flags: 0
reserved[1] [0xbdf1d000-0xbfffffff], 0x020e3000 bytes flags: 0
reserved[2] [0xbef1fcc0-0xbfffffff], 0x010e0340 bytes flags: 0
reserved[3] [0x100000000-0x17fffffff], 0x80000000 bytes flags: 0
=> md 0x100000000 4
100000000: 00000000 00000000 00000000 00000000 ................
=> mw 0x100000000 0xabcd 4
=> md 0x100000000 4
100000000: 0000abcd 0000abcd 0000abcd 0000abcd ................
Project Scope
Fix this problem on u-boot and upstream
...