diff mbox

[v4,6/9] s390x/sclp: properly guard pci-specific functions

Message ID 20170804112946.5247-7-cohuck@redhat.com
State New
Headers show

Commit Message

Cornelia Huck Aug. 4, 2017, 11:29 a.m. UTC 
If we do not provide zpci, pci reconfiguration via sclp is not available
either. Don't indicate it in the sclp facilities and return an invalid
command if the guest tries to issue pci configure/deconfigure.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
 hw/s390x/sclp.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
index 9253dbbc64..d0104cd784 100644
--- a/hw/s390x/sclp.c
+++ b/hw/s390x/sclp.c
@@ -59,6 +59,7 @@  static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb)
     int rnsize, rnmax;
     int slots = MIN(machine->ram_slots, s390_get_memslot_count(kvm_state));
     IplParameterBlock *ipib = s390_ipl_get_iplb();
+    uint64_t sclp_facilities = SCLP_HAS_CPU_INFO;
 
     CPU_FOREACH(cpu) {
         cpu_count++;
@@ -79,8 +80,10 @@  static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb)
 
     prepare_cpu_entries(sclp, read_info->entries, cpu_count);
 
-    read_info->facilities = cpu_to_be64(SCLP_HAS_CPU_INFO |
-                                        SCLP_HAS_PCI_RECONFIG);
+    if (s390_has_feat(S390_FEAT_ZPCI)) {
+        sclp_facilities |= SCLP_HAS_PCI_RECONFIG;
+    }
+    read_info->facilities = cpu_to_be64(sclp_facilities);
 
     /* Memory Hotplug is only supported for the ccw machine type */
     if (mhd) {
@@ -385,10 +388,18 @@  static void sclp_execute(SCLPDevice *sclp, SCCB *sccb, uint32_t code)
         sclp_c->unassign_storage(sclp, sccb);
         break;
     case SCLP_CMDW_CONFIGURE_PCI:
-        s390_pci_sclp_configure(sccb);
+        if (s390_has_feat(S390_FEAT_ZPCI)) {
+            s390_pci_sclp_configure(sccb);
+        } else {
+            sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
+        }
         break;
     case SCLP_CMDW_DECONFIGURE_PCI:
-        s390_pci_sclp_deconfigure(sccb);
+        if (s390_has_feat(S390_FEAT_ZPCI)) {
+            s390_pci_sclp_deconfigure(sccb);
+        } else {
+            sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
+        }
         break;
     default:
         efc->command_handler(ef, sccb, code);