[Qemu-devel] [PATCH qemu v8 07/14] spapr_iommu: Remove vfio_accel flag from sPAPRTCETable

[Alexey Kardashevskiy <aik@ozlabs.ru>]

sPAPRTCETable has a vfio_accel flag which is passed to
kvmppc_create_spapr_tce() and controls whether to create a guest view
table in KVM as this depends on the host kernel ability to accelerate
H_PUT_TCE for VFIO devices. We would set this flag at the moment
when sPAPRTCETable is created in spapr_tce_new_table() and
use when the table is allocated in spapr_tce_table_realize().

Now we explicitly enable/disable DMA windows via spapr_tce_table_enable()
and spapr_tce_table_disable() and can pass this flag directly without
caching it in sPAPRTCETable.

This removes the flag. This should cause no behavioural change.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
Changes:
v8:
* new to patchset, this is cleanup
---
 hw/ppc/spapr_iommu.c   | 8 +++-----
 include/hw/ppc/spapr.h | 1 -
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c
index fbca136..1378a7a 100644
--- a/hw/ppc/spapr_iommu.c
+++ b/hw/ppc/spapr_iommu.c
@@ -207,7 +207,7 @@ sPAPRTCETable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn)
     return tcet;
 }
 
-static void spapr_tce_table_do_enable(sPAPRTCETable *tcet)
+static void spapr_tce_table_do_enable(sPAPRTCETable *tcet, bool vfio_accel)
 {
     if (!tcet->nb_table) {
         return;
@@ -217,7 +217,7 @@ static void spapr_tce_table_do_enable(sPAPRTCETable *tcet)
                                         tcet->nb_table,
                                         tcet->page_shift,
                                         &tcet->fd,
-                                        tcet->vfio_accel);
+                                        vfio_accel);
 
     memory_region_set_size(&tcet->iommu,
                            (uint64_t)tcet->nb_table << tcet->page_shift);
@@ -236,9 +236,8 @@ void spapr_tce_table_enable(sPAPRTCETable *tcet,
     tcet->bus_offset = bus_offset;
     tcet->page_shift = page_shift;
     tcet->nb_table = nb_table;
-    tcet->vfio_accel = vfio_accel;
 
-    spapr_tce_table_do_enable(tcet);
+    spapr_tce_table_do_enable(tcet, vfio_accel);
 }
 
 void spapr_tce_table_disable(sPAPRTCETable *tcet)
@@ -256,7 +255,6 @@ void spapr_tce_table_disable(sPAPRTCETable *tcet)
     tcet->bus_offset = 0;
     tcet->page_shift = 0;
     tcet->nb_table = 0;
-    tcet->vfio_accel = false;
 }
 
 static void spapr_tce_table_unrealize(DeviceState *dev, Error **errp)
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index ed68c95..1da0ade 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -559,7 +559,6 @@ struct sPAPRTCETable {
     uint32_t page_shift;
     uint64_t *table;
     bool bypass;
-    bool vfio_accel;
     int fd;
     MemoryRegion iommu;
     struct VIOsPAPRDevice *vdev; /* for @bypass migration compatibility only */
-- 
2.4.0.rc3.8.gfb3e7d5