[PATCH v8 09/16] s390x/pci: Move g_iota from S390PCIIOMMU to S390PCIBusDevice

[Konstantin Shkolnyy <kshk@linux.ibm.com>]

This field is only used when S390PCIBusDevice exists, so it can be moved
there to simplify S390PCIIOMMU towards a structure that contains only the
IOMMU container information needed by the PCI layer for a given slot.

This also allows to save/restore this field during migration.

Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Konstantin Shkolnyy <kshk@linux.ibm.com>
---
 hw/s390x/s390-pci-bus.c         |  2 +-
 hw/s390x/s390-pci-inst.c        | 10 +++++-----
 include/hw/s390x/s390-pci-bus.h |  2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index ad4f527430..ec54eb64a6 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -617,7 +617,7 @@ static void s390_pci_ioat_replay(S390PCIBusDevice *pbdev)
     }
 
     while (curr < end) {
-        error = s390_guest_io_table_walk(iommu->g_iota, curr, &entry);
+        error = s390_guest_io_table_walk(pbdev->g_iota, curr, &entry);
         if (error) {
             pbdev->state = ZPCI_FS_ERROR;
             s390_pci_generate_error_event(error, pbdev->fh, pbdev->fid, curr,
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index dc52da41b5..22b477ab38 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -765,7 +765,7 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
     } else {
         dma_avail = 1;
     }
-    if (!iommu->g_iota) {
+    if (!pbdev->g_iota) {
         error = ERR_EVENT_INVALAS;
         goto err;
     }
@@ -785,7 +785,7 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
     start = sstart;
     again = false;
     while (start < end) {
-        error = s390_guest_io_table_walk(iommu->g_iota, start, &entry);
+        error = s390_guest_io_table_walk(pbdev->g_iota, start, &entry);
         if (error) {
             break;
         }
@@ -1056,7 +1056,7 @@ static int reg_ioat(CPUS390XState *env, S390PCIBusDevice *pbdev, ZpciFib fib,
 
     iommu->pba = pba;
     iommu->pal = pal;
-    iommu->g_iota = g_iota;
+    pbdev->g_iota = g_iota;
 
     if (t) {
         s390_pci_iommu_enable(pbdev);
@@ -1073,7 +1073,7 @@ void pci_dereg_ioat(S390PCIBusDevice *pbdev)
     s390_pci_iommu_disable(pbdev);
     iommu->pba = 0;
     iommu->pal = 0;
-    iommu->g_iota = 0;
+    pbdev->g_iota = 0;
 }
 
 void fmb_timer_free(S390PCIBusDevice *pbdev)
@@ -1446,7 +1446,7 @@ int stpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
 
     stq_be_p(&fib.pba, pbdev->iommu->pba);
     stq_be_p(&fib.pal, pbdev->iommu->pal);
-    stq_be_p(&fib.iota, pbdev->iommu->g_iota);
+    stq_be_p(&fib.iota, pbdev->g_iota);
     stq_be_p(&fib.aibv, pbdev->routes.adapter.ind_addr);
     stq_be_p(&fib.aisb, pbdev->routes.adapter.summary_addr);
     stq_be_p(&fib.fmb_addr, pbdev->fmb_addr);
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index 126a50c98b..a7d1f1ade2 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -275,7 +275,6 @@ struct S390PCIIOMMU {
     Object parent_obj;
     AddressSpace as;
     MemoryRegion mr;
-    uint64_t g_iota;
     uint64_t pba;
     uint64_t pal;
     uint64_t max_dma_limit;
@@ -352,6 +351,7 @@ struct S390PCIBusDevice {
     IOMMUMemoryRegion iommu_mr;
     MemoryRegion *dm_mr;
     GHashTable *iotlb;
+    uint64_t g_iota;
     S390PCIDMACount *dma_limit;
     MemoryRegion msix_notify_mr;
     IndAddr *summary_ind;
-- 
2.34.1