[PATCH 4/4] s390x/pci: add supported DT information to clp response

[Matthew Rosato <mjrosato@linux.ibm.com>]

The DTSM is a mask that specifies which I/O Address Translation designation
types are supported.  A linux guest today does not look at this field but
could in the future; let's advertise what QEMU actually supports.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
---
 hw/s390x/s390-pci-bus.c         | 1 +
 hw/s390x/s390-pci-vfio.c        | 1 +
 include/hw/s390x/s390-pci-bus.h | 1 +
 include/hw/s390x/s390-pci-clp.h | 3 ++-
 4 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 1b51a72838..01b58ebc70 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -782,6 +782,7 @@ static void s390_pci_init_default_group(void)
     resgrp->i = 128;
     resgrp->maxstbl = 128;
     resgrp->version = 0;
+    resgrp->dtsm = ZPCI_DTSM;
 }
 
 static void set_pbdev_info(S390PCIBusDevice *pbdev)
diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c
index 2a153fa8c9..6f80a47e29 100644
--- a/hw/s390x/s390-pci-vfio.c
+++ b/hw/s390x/s390-pci-vfio.c
@@ -160,6 +160,7 @@ static void s390_pci_read_group(S390PCIBusDevice *pbdev,
         resgrp->i = cap->noi;
         resgrp->maxstbl = cap->maxstbl;
         resgrp->version = cap->version;
+        resgrp->dtsm = ZPCI_DTSM;
     }
 }
 
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index 2727e7bdef..da3cde2bb4 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -37,6 +37,7 @@
 #define ZPCI_MAX_UID 0xffff
 #define UID_UNDEFINED 0
 #define UID_CHECKING_ENABLED 0x01
+#define ZPCI_DTSM 0x40
 
 OBJECT_DECLARE_SIMPLE_TYPE(S390pciState, S390_PCI_HOST_BRIDGE)
 OBJECT_DECLARE_SIMPLE_TYPE(S390PCIBus, S390_PCI_BUS)
diff --git a/include/hw/s390x/s390-pci-clp.h b/include/hw/s390x/s390-pci-clp.h
index 96b8e3f133..cc8c8662b8 100644
--- a/include/hw/s390x/s390-pci-clp.h
+++ b/include/hw/s390x/s390-pci-clp.h
@@ -163,7 +163,8 @@ typedef struct ClpRspQueryPciGrp {
     uint8_t fr;
     uint16_t maxstbl;
     uint16_t mui;
-    uint64_t reserved3;
+    uint8_t dtsm;
+    uint8_t reserved3[7];
     uint64_t dasm; /* dma address space mask */
     uint64_t msia; /* MSI address */
     uint64_t reserved4;
-- 
2.27.0