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s390x/kvm: Log unmanageable program interruptions 

The kernel only drops to userspace if an endless program interrupt loop
has been detected. Let's print an error message in this case to inform
the user about the crash and stop the affected CPU with a panic event,
just like it is already done for the external interruption loop detection.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Thomas Huth 2014-05-07 09:45:21 +02:00 committed by Cornelia Huck
parent a2689242b1
commit 6449a41a4d
1 changed files with 6 additions and 0 deletions
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6
target-s390x/kvm.c
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@ -83,6 +83,7 @@
#define DIAG_KVM_BREAKPOINT 0x501
#define ICPT_INSTRUCTION 0x04
#define ICPT_PROGRAM 0x08
#define ICPT_EXT_INT 0x14
#define ICPT_WAITPSW 0x1c
#define ICPT_SOFT_INTERCEPT 0x24
@ -966,6 +967,11 @@ static int handle_intercept(S390CPU *cpu)
case ICPT_INSTRUCTION:
r = handle_instruction(cpu, run);
break;
case ICPT_PROGRAM:
unmanageable_intercept(cpu, "program interrupt",
offsetof(LowCore, program_new_psw));
r = EXCP_HALTED;
break;
case ICPT_EXT_INT:
unmanageable_intercept(cpu, "external interrupt",
offsetof(LowCore, external_new_psw));