KVM: s390: add more debug data for the pfault diagnoses

We're not only interested in the address of the control block, but
also in the requested subcommand and for the token subcommand, in the
specified token address and masks.

Suggested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>

diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c
index 18717547e3aeb24d86dc830e835af41991b2799e..5fbfb88f847731db6ef4cb1ab87b32cf601703df 100644 (file)
--- a/arch/s390/kvm/diag.c
+++ b/arch/s390/kvm/diag.c
@@ -88,6 +88,9 @@ static int __diag_page_ref_service(struct kvm_vcpu *vcpu)
 
        switch (parm.subcode) {
        case 0: /* TOKEN */
+               VCPU_EVENT(vcpu, 3, "pageref token addr 0x%llx "
+                          "select mask 0x%llx compare mask 0x%llx",
+                          parm.token_addr, parm.select_mask, parm.compare_mask);
                if (vcpu->arch.pfault_token != KVM_S390_PFAULT_TOKEN_INVALID) {
                        /*
                         * If the pagefault handshake is already activated,
@@ -117,6 +120,7 @@ static int __diag_page_ref_service(struct kvm_vcpu *vcpu)
                 * the cancel, therefore to reduce code complexity, we assume
                 * all outstanding tokens are already pending.
                 */
+               VCPU_EVENT(vcpu, 3, "pageref cancel addr 0x%llx", parm.token_addr);
                if (parm.token_addr || parm.select_mask ||
                    parm.compare_mask || parm.zarch)
                        return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);