KVM: s390: Enable DAT support for TPROT handler

The TPROT instruction can be used to check the accessability of storage
for any kind of logical addresses. So far, our handler only supported
real addresses. This patch now also enables support for addresses that
have to be translated via DAT first. And while we're at it, change the
code to use the common KVM function gfn_to_hva_prot() to check for the
validity and writability of the memory page.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/s390/kvm/gaccess.c b/arch/s390/kvm/gaccess.c
index 5f73826992f2..4653ac6e182b 100644
--- a/arch/s390/kvm/gaccess.c
+++ b/arch/s390/kvm/gaccess.c
@@ -292,7 +292,7 @@ static void ipte_unlock_siif(struct kvm_vcpu *vcpu)
                 wake_up(&vcpu->kvm->arch.ipte_wq);
 }
 
-static void ipte_lock(struct kvm_vcpu *vcpu)
+void ipte_lock(struct kvm_vcpu *vcpu)
 {
         if (vcpu->arch.sie_block->eca & 1)
                 ipte_lock_siif(vcpu);
@@ -300,7 +300,7 @@ static void ipte_lock(struct kvm_vcpu *vcpu)
                 ipte_lock_simple(vcpu);
 }
 
-static void ipte_unlock(struct kvm_vcpu *vcpu)
+void ipte_unlock(struct kvm_vcpu *vcpu)
 {
         if (vcpu->arch.sie_block->eca & 1)
                 ipte_unlock_siif(vcpu);