409422cd83
Sometimes (e.g. early boot) a guest is broken in such ways that it loops 100% delivering operation exceptions (illegal operation) but the pgm new PSW is not set properly. This will result in code being read from address zero, which usually contains another illegal op. Let's detect this case and put the guest in crashed state. Instead of only detecting this for address zero apply a heuristic that will work for any program check new psw so that it will also reach the crashed state if you provide some random elf file to the -kernel option. We do not want guest problem state to be able to trigger a guest panic, e.g. by faulting on an address that is the same as the program check new PSW, so we check for the problem state bit being off. With this we a: get rid of CPU consumption of such broken guests b: keep the program old PSW. This allows to find out the original illegal operation - making debugging such early boot issues much easier than with single stepping This relies on the kernel using a similar heuristic and passing such operation exceptions to user space. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> |
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| .. | ||
| arch_dump.c | ||
| cc_helper.c | ||
| cpu_features_def.h | ||
| cpu_features.c | ||
| cpu_features.h | ||
| cpu_models.c | ||
| cpu_models.h | ||
| cpu-qom.h | ||
| cpu.c | ||
| cpu.h | ||
| fpu_helper.c | ||
| gdbstub.c | ||
| gen-features.c | ||
| helper.c | ||
| helper.h | ||
| insn-data.def | ||
| insn-format.def | ||
| int_helper.c | ||
| interrupt.c | ||
| ioinst.c | ||
| kvm.c | ||
| machine.c | ||
| Makefile.objs | ||
| mem_helper.c | ||
| misc_helper.c | ||
| mmu_helper.c | ||
| trace-events | ||
| translate.c | ||