Commit 6cc571b1 authored Sep 25, 2018 by Pierre Morel Committed by Christian Borntraeger Sep 28, 2018

KVM: s390: Clear Crypto Control Block when using vSIE



When we clear the Crypto Control Block (CRYCB) used by a guest
level 2, the vSIE shadow CRYCB for guest level 3 must be updated
before the guest uses it.

We achieve this by using the KVM_REQ_VSIE_RESTART synchronous
request for each vCPU belonging to the guest to force the reload
of the shadow CRYCB before rerunning the guest level 3.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Message-Id: <20180925231641.4954-16-akrowiak@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

parent cd8a377e

arch/s390/kvm/kvm-s390.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -2043,6 +2043,8 @@ void kvm_arch_crypto_clear_masks(struct kvm *kvm)
		memset(&kvm->arch.crypto.crycb->apcb1, 0,
		sizeof(kvm->arch.crypto.crycb->apcb1));

		/* recreate the shadow crycb for each vcpu */
		kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART);
		kvm_s390_vcpu_unblock_all(kvm);
		mutex_unlock(&kvm->lock);
		}

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