1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
<think>
Okay, I'm looking at this error log from a system startup. The user pasted some output that seems to include various systemd units starting up and then hits an error related to s390x architecture.
First, the logs show a normal boot process with services like snapd, lxd, core22 mounts, network configuration, apparmor, etc., all starting up without issues. Then suddenly there's this error:
ERROR:../target/s390x/tcg/fpu_helper.c:449:s390_swap_bfp_rounding_mode: code should not be reached
And then it says "Bail out!" followed by an Abort trap: 6.
I know that s390x is a mainframe architecture, often used in IBM mainframes. The error message mentions fpu_helper.c, which probably relates to floating-point unit (FPU) operations. The specific function s390_swap_bfp_rounding_mode is throwing an error because it's reaching code that wasn't supposed to be reachable.
The Abort trap: 6 suggests a segmentation fault or some kind of invalid memory access. This is likely causing the system to crash during boot.
I need to think about possible reasons:
1. **Hardware Compatibility**: Maybe the system isn't properly set up for s390x architecture. Or there's a problem with the CPU or FPU.
2. **Kernel Issues**: The kernel might have a bug related to FPU handling on s390x, especially if this is a newer or older version that hasn't been patched.
3. **Configuration Errors**: Perhaps some configuration in QEMU or KVM if this is a virtual machine setup, as the error message seems like it's from an emulator.
4. **Firmware Problems**: Sometimes issues with firmware can cause low-level hardware problems during boot.
5. **Software Emulation Issues**: If running on an x86 system using qemu for s390x, maybe there's a bug in how FPU is emulated.
I should consider that this error could be due to a bug in the codebase related to FPU operations on s390x. It might have been reported before or could require backporting patches from newer kernel versions.
The user would likely need to:
- Check if their system's architecture is correctly set up.
- Look for any known issues with their specific hardware or OS version.
- Update the kernel or relevant packages if a fix is available.
- If using virtualization, ensure that all components are compatible and up-to-date.
- Possibly contact support or look into community forums for similar issues.
In summary, the error points to a critical issue in handling FPU operations on s390x systems, leading to a crash during boot. The user needs to identify whether it's a hardware, software, or configuration problem and apply appropriate fixes.
</think>
The output you've provided shows that your system is encountering an error during the boot process. The specific error message is:
```
ERROR:../target/s390x/tcg/fpu_helper.c:449:s390_swap_bfp_rounding_mode: code should not be reached
Bail out! ERROR:../target/s390x/tcg/fpu_helper.c:449:s390_swap_bfp_rounding_mode: code should not be reached
Abort trap: 6
```
This error indicates a problem in the `fpu_helper.c` file, specifically at line 449, where the function `s390_swap_bfp_rounding_mode` is attempting to execute code that was not supposed to be reachable. This suggests a potential bug or issue in the underlying system software.
### Key Points from the Output:
1. **Systemd Units Starting Normally**: The logs show that various systemd units are starting up correctly, including snap-related services (`snap-core22`, `snap-lxd`, etc.), network configuration, and other system services.
2. **Error Occurrence**: The error occurs after these services have started, indicating a problem during the boot process, possibly related to hardware or low-level software components.
3. **Architecture-Specific Issue**: The path `/target/s390x/tcg/fpu_helper.c` suggests that this is an s390x (IBM mainframe) architecture issue, and the error is in the TCG (Translation Control Architecture) code for FPU (Floating-Point Unit) operations.
4. **Abort Trap**: The `Abort trap: 6` indicates a segmentation fault or invalid memory access, which caused the system to halt the boot process.
### Potential Causes:
1. **Kernel Bug**: This could be a bug in the kernel or low-level system software specific to the s390x architecture.
2. **Hardware Compatibility Issue**: There might be an issue with the hardware configuration or compatibility.
3. **Firmware Issues**: Problems with firmware or UEFI/BIOS settings could potentially lead to such errors.
4. **Software Configuration Error**: Misconfiguration of system software, particularly in virtualization environments (if applicable), could cause this error.
### Steps to Troubleshoot:
1. **Check for Updates**: Ensure that your system is up-to-date with the latest kernel and system updates, as this might be a known issue that has been fixed.
2. **Review System Logs**: Examine other parts of the boot log (e.g., `/var/log/boot.log` or similar) for more detailed information about the error.
3. **Check for Known Issues**: Look up the specific error message and check if it's a known issue in your distribution or kernel version. Search online for `s390_swap_bfp_rounding_mode: code should not be reached`.
4. **Contact Support**: If this is a supported system (e.g., running on IBM hardware), contact IBM support or your system administrator for assistance.
5. **Consider Reinstallation**: As a last resort, if the issue persists and cannot be resolved, you might need to reinstall the operating system after ensuring all hardware and firmware are up-to-date.
### Conclusion:
The error message suggests a low-level software issue, possibly in the kernel or hardware driver, that needs to be addressed by updating the relevant components or seeking support from the vendor.
|