[Qemu-devel] [PATCH v4 1/8] iommu: add is_write as a parameter to the translate function of MemoryRegionIOMMUOps

[Le Tan <tamlokveer@gmail.com>]

Add a bool variable is_write as a parameter to the translate function of
MemoryRegionIOMMUOps to indicate the operation of the access. It can be
used for correct fault reporting from within the callback.
Change the interface of related functions.

Signed-off-by: Le Tan <tamlokveer@gmail.com>
---
 exec.c                | 2 +-
 hw/alpha/typhoon.c    | 3 ++-
 hw/pci-host/apb.c     | 3 ++-
 hw/ppc/spapr_iommu.c  | 3 ++-
 include/exec/memory.h | 2 +-
 5 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/exec.c b/exec.c
index 765bd94..5ccc106 100644
--- a/exec.c
+++ b/exec.c
@@ -373,7 +373,7 @@ MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr,
             break;
         }
 
-        iotlb = mr->iommu_ops->translate(mr, addr);
+        iotlb = mr->iommu_ops->translate(mr, addr, is_write);
         addr = ((iotlb.translated_addr & ~iotlb.addr_mask)
                 | (addr & iotlb.addr_mask));
         len = MIN(len, (addr | iotlb.addr_mask) - addr + 1);
diff --git a/hw/alpha/typhoon.c b/hw/alpha/typhoon.c
index 67a1070..31947d9 100644
--- a/hw/alpha/typhoon.c
+++ b/hw/alpha/typhoon.c
@@ -660,7 +660,8 @@ static bool window_translate(TyphoonWindow *win, hwaddr addr,
 /* Handle PCI-to-system address translation.  */
 /* TODO: A translation failure here ought to set PCI error codes on the
    Pchip and generate a machine check interrupt.  */
-static IOMMUTLBEntry typhoon_translate_iommu(MemoryRegion *iommu, hwaddr addr)
+static IOMMUTLBEntry typhoon_translate_iommu(MemoryRegion *iommu, hwaddr addr,
+                                             bool is_write)
 {
     TyphoonPchip *pchip = container_of(iommu, TyphoonPchip, iommu);
     IOMMUTLBEntry ret;
diff --git a/hw/pci-host/apb.c b/hw/pci-host/apb.c
index d238a84..0e0e0ee 100644
--- a/hw/pci-host/apb.c
+++ b/hw/pci-host/apb.c
@@ -203,7 +203,8 @@ static AddressSpace *pbm_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
     return &is->iommu_as;
 }
 
-static IOMMUTLBEntry pbm_translate_iommu(MemoryRegion *iommu, hwaddr addr)
+static IOMMUTLBEntry pbm_translate_iommu(MemoryRegion *iommu, hwaddr addr,
+                                         bool is_write)
 {
     IOMMUState *is = container_of(iommu, IOMMUState, iommu);
     hwaddr baseaddr, offset;
diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c
index f6e32a4..6c91d8e 100644
--- a/hw/ppc/spapr_iommu.c
+++ b/hw/ppc/spapr_iommu.c
@@ -59,7 +59,8 @@ static sPAPRTCETable *spapr_tce_find_by_liobn(uint32_t liobn)
     return NULL;
 }
 
-static IOMMUTLBEntry spapr_tce_translate_iommu(MemoryRegion *iommu, hwaddr addr)
+static IOMMUTLBEntry spapr_tce_translate_iommu(MemoryRegion *iommu, hwaddr addr,
+                                               bool is_write)
 {
     sPAPRTCETable *tcet = container_of(iommu, sPAPRTCETable, iommu);
     uint64_t tce;
diff --git a/include/exec/memory.h b/include/exec/memory.h
index e2c8e3e..834543d 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -129,7 +129,7 @@ typedef struct MemoryRegionIOMMUOps MemoryRegionIOMMUOps;
 
 struct MemoryRegionIOMMUOps {
     /* Return a TLB entry that contains a given address. */
-    IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr);
+    IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr, bool is_write);
 };
 
 typedef struct CoalescedMemoryRange CoalescedMemoryRange;
-- 
1.9.1