[PATCH v4 10/11] s390x/pci: use dtsm provided from vfio capabilities for interpreted devices

[Matthew Rosato <mjrosato@xxxxxxxxxxxxx>]

When using the IOAT assist via interpretation, we should advertise what
the host driver supports, not QEMU.

Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
Signed-off-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx>
---
 hw/s390x/s390-pci-vfio.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c
index 7808e8d939..def4e90a40 100644
--- a/hw/s390x/s390-pci-vfio.c
+++ b/hw/s390x/s390-pci-vfio.c
@@ -181,7 +181,11 @@ static void s390_pci_read_group(S390PCIBusDevice *pbdev,
         resgrp->i = cap->noi;
         resgrp->maxstbl = cap->maxstbl;
         resgrp->version = cap->version;
-        resgrp->dtsm = ZPCI_DTSM;
+        if (hdr->version >= 2 && pbdev->interp) {
+            resgrp->dtsm = cap->dtsm;
+        } else {
+            resgrp->dtsm = ZPCI_DTSM;
+        }
     }
 }
 
-- 
2.27.0