Hart isolation configuration failure (error -3) with OpenSBI 1.8 on QEMU 10.1.3 rva22s64/rva23s64 profiles

[Anup Patel]

On Mon, Jan 5, 2026 at 11:13 PM Thomas Perrot <thomas.perrot at bootlin.com> wrote:
>
> Hello,
>
> Happy New Year!
>
> I'm facing a hart isolation configuration error when running OpenSBI
> 1.8 on QEMU 10.1.3 with the RISC-V application profiles rva22s64 and
> rva23s64:
>
>     init_coldboot: hart isolation configure failed (error -3)
>
> No issue occurs when using the rv64 profile. The system continues to
> boot after the error, but I'd like to understand the root cause.
>
> I haven't tested OpenSBI 1.8 on real hardware yet - that's my next
> step.
>
> Is there a known QEMU issue? Is there a recommended workaround besides
> using rv64?
>
> Below is the complete trace:
>
> qemu-system-riscv64 -device virtio-net-
> device,netdev=net0,mac=52:54:00:12:35:02 -netdev
> user,id=net0,hostfwd=tcp:127.0.0.1:2222-:22,hostfwd=tcp:127.0.0.1:2323-
> :23,tftp=/src/build/tmp/deploy/images/qemuriscv64 -object rng-
> random,filename=/dev/urandom,id=rng0 -device virtio-rng-pci,rng=rng0 -
> drive id=disk0,file=/src/build/tmp/deploy/images/qemuriscv64/core-
> image-minimal-qemuriscv64.rootfs-20260105173847.ext4,if=none,format=raw
> -device virtio-blk-device,drive=disk0 -device qemu-xhci -device usb-
> tablet -device usb-kbd  -machine virt -cpu rva23s64 -smp 4 -m 256 -
> snapshot -serial mon:stdio -serial null -nographic -device bochs-
> display -bios /src/build/tmp/deploy/images/qemuriscv64/fw_jump.elf -
> kernel /src/build/tmp/deploy/images/qemuriscv64/Image -append
> 'root=/dev/vda rw  mem=256M ip=dhcp console=ttyS0 console=hvc0
> earlycon=sbi swiotlb=0
>
> OpenSBI v1.8
>    ____                    _____ ____ _____
>   / __ \                  / ____|  _ \_   _|
>  | |  | |_ __   ___ _ __ | (___ | |_) || |
>  | |  | | '_ \ / _ \ '_ \ \___ \|  _ < | |
>  | |__| | |_) |  __/ | | |____) | |_) || |_
>   \____/| .__/ \___|_| |_|_____/|____/_____|
>         | |
>         |_|
>
> Platform Name               : riscv-virtio,qemu
> Platform Features           : medeleg
> Platform HART Count         : 4
> Platform HART Protection    : ---
> Platform IPI Device         : aclint-mswi
> Platform Timer Device       : aclint-mtimer @ 10000000Hz
> Platform Console Device     : uart8250
> Platform HSM Device         : ---
> Platform PMU Device         : ---
> Platform Reboot Device      : syscon-reboot
> Platform Shutdown Device    : syscon-poweroff
> Platform Suspend Device     : ---
> Platform CPPC Device        : ---
> Firmware Base               : 0x80000000
> Firmware Size               : 357 KB
> Firmware RW Offset          : 0x40000
> Firmware RW Size            : 101 KB
> Firmware Heap Offset        : 0x4d000
> Firmware Heap Size          : 49 KB (total), 0 KB (reserved), 13 KB
> (used), 35 KB (free)
> Firmware Scratch Size       : 4096 B (total), 1464 B (used), 2632 B
> (free)
> Runtime SBI Version         : 3.0
> Standard SBI Extensions     :
> time,rfnc,ipi,base,hsm,srst,pmu,dbcn,fwft,legacy,dbtr,sse
> Experimental SBI Extensions : none
>
> Domain0 Name                : root
> Domain0 Boot HART           : 0
> Domain0 HARTs               : 0*,1*,2*,3*
> Domain0 Region00            : 0x0000000080040000-0x000000008005ffff M:
> (F,R,W) S/U: ()
> Domain0 Region01            : 0x0000000080000000-0x000000008003ffff M:
> (F,R,X) S/U: ()
> Domain0 Region02            : 0x0000000000100000-0x0000000000100fff M:
> (I,R,W) S/U: (R,W)
> Domain0 Region03            : 0x0000000010000000-0x0000000010000fff M:
> (I,R,W) S/U: (R,W)
> Domain0 Region04            : 0x0000000002000000-0x000000000200ffff M:
> (I,R,W) S/U: ()
> Domain0 Region05            : 0x000000000c400000-0x000000000c5fffff M:
> (I,R,W) S/U: (R,W)
> Domain0 Region06            : 0x000000000c000000-0x000000000c3fffff M:
> (I,R,W) S/U: (R,W)
> Domain0 Region07            : 0x0000000000000000-0xffffffffffffffff M:
> () S/U: (R,W,X)
> Domain0 Next Address        : 0x0000000080200000
> Domain0 Next Arg1           : 0x0000000082200000
> Domain0 Next Mode           : S-mode
> Domain0 SysReset            : yes
> Domain0 SysSuspend          : yes
>
> Boot HART ID                : 0
> Boot HART Domain            : root
> Boot HART Priv Version      : v1.12
> Boot HART Base ISA          : rv64imafdcbvh
> Boot HART ISA Extensions    :
> smstateen,sscofpmf,sstc,zicntr,zihpm,zicboz,zicbom,svpbmt,sdtrig,svade,
> smnpm,ssstateen
> Boot HART PMP Count         : 0
> Boot HART PMP Granularity   : 0 bits
> Boot HART PMP Address Bits  : 0
> Boot HART MHPM Info         : 16 (0x0007fff8)
> Boot HART Debug Triggers    : 2 triggers
> Boot HART MIDELEG           : 0x0000000000003666
> Boot HART MEDELEG           : 0x0000000000f4b509
> init_coldboot: hart isolation configure failed (error -3)

Thinking about this more, this looks like QEMU bug because
there are no PMP entries for rva22s64 and rva23s64 which
is why there is no hart isolation mechanism hence the hart
isolation configure fails.

Regards,
Anup