linux

iv/linux

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Christian Borntraeger 3f23f78129 KVM: s390: Remove false WARN_ON_ONCE for the PQAP instruction

commit 5615e74f48dcc982655543e979b6c3f3f877e6f6 upstream.

In LPAR we will only get an intercept for FC==3 for the PQAP
instruction. Running nested under z/VM can result in other intercepts as
well as ECA_APIE is an effective bit: If one hypervisor layer has
turned this bit off, the end result will be that we will get intercepts for
all function codes. Usually the first one will be a query like PQAP(QCI).
So the WARN_ON_ONCE is not right. Let us simply remove it.

Cc: Pierre Morel <pmorel@linux.ibm.com>
Cc: Tony Krowiak <akrowiak@linux.ibm.com>
Cc: stable@vger.kernel.org # v5.3+
Fixes: e5282de93105 ("s390: ap: kvm: add PQAP interception for AQIC")
Link: https://lore.kernel.org/kvm/20200505083515.2720-1-borntraeger@de.ibm.com
Reported-by: Qian Cai <cailca@icloud.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2020-05-14 07:58:25 +02:00

diag.c

KVM: s390: add vcpu stat counters for many instruction

2018-01-24 16:49:02 +01:00

gaccess.c

treewide: Use array_size() in vmalloc()

2018-06-12 16:19:22 -07:00

gaccess.h

KVM: s390: Remove redundant license text

2017-12-06 09:18:42 +01:00

guestdbg.c

KVM: s390: introduce defines for control registers