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KVM: s390: fix and enforce return code handling for irq injections

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kvm_s390_inject_program_int() and friends may fail if no memory is available.
This must be reported to the calling functions, so that this gets passed
down to user space which should fix the situation.
Alternatively we end up with guest state corruption.

So fix this and enforce return value checking by adding a __must_check
annotation to all of these function prototypes.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Heiko Carstens
2013-03-25 17:22:53 +01:00
committed by Gleb Natapov
parent 3736b874a3
commit db4a29cb6a
4 changed files with 37 additions and 73 deletions
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3
arch/s390/kvm/kvm-s390.c
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@@ -633,8 +633,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
} else {
VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
trace_kvm_s390_sie_fault(vcpu);
kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
rc = 0;
rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
}
}
VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",