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authorPierre Morel <pmorel@linux.ibm.com>2018-09-26 01:16:30 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2018-09-28 15:50:11 +0200
commit6cc571b1b1e8b6fbcf69411d115cf9d9be866276 (patch)
tree5a2894e2f2710de9252530f181640287b7819082 /arch/s390/kvm/kvm-s390.c
parents390: vfio-ap: implement VFIO_DEVICE_RESET ioctl (diff)
downloadlinux-6cc571b1b1e8b6fbcf69411d115cf9d9be866276.tar.xz
linux-6cc571b1b1e8b6fbcf69411d115cf9d9be866276.zip
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>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.c')
-rw-r--r--arch/s390/kvm/kvm-s390.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 75aa5aa4a926..c94ef2d0dbe4 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -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);
}