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s390x/kvm: Fix vector validity bit in device machine checks 

Device hotplugs trigger a crw machine check. All machine checks
have validity bits for certain register types. With vector support
we also have to claim that vector registers are valid.
This is a band-aid suitable for stable. Long term we should
create the full  mcic value dynamically depending on the active
features in the kernel interrupt handler.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
stable-2.5
Christian Borntraeger 2015-10-07 10:29:42 +02:00 committed by Cornelia Huck
parent 085b0b055b
commit 2ab75df38e
1 changed files with 3 additions and 0 deletions
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target-s390x/kvm.c
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@ -2072,6 +2072,9 @@ void kvm_s390_crw_mchk(void)
.u.mchk.cr14 = 1 << 28,
.u.mchk.mcic = 0x00400f1d40330000ULL,
};
if (kvm_check_extension(kvm_state, KVM_CAP_S390_VECTOR_REGISTERS)) {
irq.u.mchk.mcic |= 0x0000004000000000ULL;
}
kvm_s390_floating_interrupt(&irq);
}