On 19/06/2023 12:23, sai krishna Allu wrote:
Hi Ralf,
I have attached the hypervisor.o and I have taken the dump of that which
is also attached too.
I have below command to extract, let me know is it ok or not.
ubuntu@ubuntu:~$ aarch64-linux-gnu-objdump -d
jailhouse/hypervisor/hypervisor.o|tee hypervisor_dump.txt
ubuntu@ubuntu:~$ cat hypervisor_dump.txt -n |grep "ffffc0203820"
*3338 ffffc0203820: f9400282 ldr x2, [x20]*
ubuntu@ubuntu:~$ vi hypervisor_dump.txt +3338
patch+0x218>
3334 ffffc0203810: f9400282 ldr x2, [x20]
3335 ffffc0203814: f9400842 ldr x2, [x2, #16]
3336 ffffc0203818: 8a130042 and x2, x2, x19
3337 ffffc020381c: f90a4002 str x2, [x0, #5248]
* 3338 ffffc0203820: f9400282 ldr x2, [x20]*
3339 ffffc0203824: f9400c42 ldr x2, [x2, #24]
3340 ffffc0203828: 8a130053 and x19, x2, x19
3341 ffffc020382c: 52800022 mov w2, #0x1
The instruction at ffffc0203820 means it Load x2 from contents of x20
register.
Please suggest how to fix this.
Keep calm, I'm still trying to figure out where the problem exactly is.
Now I know the line of code, where the exception exactly happens. It's
in hypervisor/arch/arm-common/psci.c:39
ldr x2, [x20] <- Here we likely load ctx->regs[2], and the only variant
how this could fail is that ctx points to somewhere. Here we're inside
the routine psci_emulate_cpu_on, which shouldn't even be called when
enabling the hypervisor. I don't know yet what could be the issue.
Before we keep on debugging: I saw that you use Jailhouse v0.12.
Could you please switch to the master and/or next branch of jailhouse,
and see if the error still occurs there?
Thanks,
Ralf
Regards,
Sai Krishna
On Saturday, June 17, 2023 at 8:59:56 PM UTC+5:30 Ralf Ramsauer wrote:
Hi,
On 15/06/2023 10:11, sai krishna Allu wrote:
> Hi Team,
>
> I have Raspberry Pi 4, which is installed with Ubuntu 20.04.5 LTS
64 bit.
> after loading the jailhouse.ko file, when I gave following
command I am
> getting the exception.
>
> ubuntu@ubuntu:~/jailhouse$ sudo jailhouse enable
configs/arm64/rpi4.cell
>
> Initializing Jailhouse hypervisor v0.12 (0-g92db71f2) on CPU 0
> Code location: 0x0000ffffc0200800
> Page pool usage after early setup: mem 39/994, remap 0/131072
> Initializing processors:
> CPU 0...
> FATAL: Unhandled HYP exception: synchronous abort from EL2
Synchronous abort from EL2 means that we have a fatal error inside
Jailhouse (e.g., segfault).
> pc: 0000ffffc0203820 lr: 0000ffffc020380c spsr: 800003c9 EL2
Could you please disassemble your hypervisor binary, and see where the
exception exactly occurs? Do this with:
aarch64-objdump -d hypervisor/hypervisor.o
And see what code executes behind 0x0000ffffc0203820. Alternatively,
you
can also attach the hypervisor.o.
Thanks,
Ralf
> sp: 0000ffffc021ee40 esr: 00 1 0000000
> x0: 0000000084000000 x1: 0000000000000008 x2: 0000000080003580
> x3: 0000ffffc020e170 x4: 0000000000000014 x5: 000003ffffffffff
> x6: 0000000000000029 x7: 0000ffffc0219d30 x8: 000000000000002a
> x9: 0000000000000000 x10: 0000000000000000 x11: 0000000000000001
> x12: 0000000000000015 x13: 0000000000000001 x14: 0000ffffc0219000
> x15: 0000ffffc0015040 x16: 0000ffffc020d1fc x17: ffffbcae22826688
> x18: 0000000000000001 x19: 0000ffffc021e000 x20: 0000ffffc0219000
> x21: 0000ffffc0200000 x22: 0000ffffc0219000 x23: 0000000000000000
> x24: 0000000000000001 x25: 0000ffffc021e000 x26: 0000ffffc021f000
> x27: 0000ffffc020f000 x28: 0000ffffc0218000 x29: 0000ffffc021ee40
>
> Hypervisor stack before exception Stopping CPU 0 (Cell:
"Raspberry-Pi4")
>
>
> Please suggest how to fix this problem.
>
> Regards,
> Sai Krishna
>
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