system/iommufd: Use uint64_t type for IOVA mapping size

The 'ram_addr_t' type is described as:

  a QEMU internal address space that maps guest RAM physical
  addresses into an intermediate address space that can map
  to host virtual address spaces.

This doesn't represent well an IOVA mapping size. Simply use
the uint64_t type.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250930123528.42878-2-philmd@linaro.org
Signed-off-by: Cédric Le Goater <clg@redhat.com>

backends/iommufd.c

diff --git a/backends/iommufd.c b/backends/iommufd.c
index 2a33c7a..fdfb7c9 100644
--- a/backends/iommufd.c
+++ b/backends/iommufd.c
@@ -197,7 +197,7 @@
 }
 
 int iommufd_backend_map_dma(IOMMUFDBackend *be, uint32_t ioas_id, hwaddr iova,
-                            ram_addr_t size, void *vaddr, bool readonly)
+                            uint64_t size, void *vaddr, bool readonly)
 {
     int ret, fd = be->fd;
     struct iommu_ioas_map map = {
@@ -230,7 +230,7 @@
 }
 
 int iommufd_backend_map_file_dma(IOMMUFDBackend *be, uint32_t ioas_id,
-                                 hwaddr iova, ram_addr_t size,
+                                 hwaddr iova, uint64_t size,
                                  int mfd, unsigned long start, bool readonly)
 {
     int ret, fd = be->fd;
@@ -268,7 +268,7 @@
 }
 
 int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
-                              hwaddr iova, ram_addr_t size)
+                              hwaddr iova, uint64_t size)
 {
     int ret, fd = be->fd;
     struct iommu_ioas_unmap unmap = {

include/system/iommufd.h

diff --git a/include/system/iommufd.h b/include/system/iommufd.h
index c9c72ff..a659f36 100644
--- a/include/system/iommufd.h
+++ b/include/system/iommufd.h
@@ -45,12 +45,12 @@
                                 Error **errp);
 void iommufd_backend_free_id(IOMMUFDBackend *be, uint32_t id);
 int iommufd_backend_map_file_dma(IOMMUFDBackend *be, uint32_t ioas_id,
-                                 hwaddr iova, ram_addr_t size, int fd,
+                                 hwaddr iova, uint64_t size, int fd,
                                  unsigned long start, bool readonly);
 int iommufd_backend_map_dma(IOMMUFDBackend *be, uint32_t ioas_id, hwaddr iova,
-                            ram_addr_t size, void *vaddr, bool readonly);
+                            uint64_t size, void *vaddr, bool readonly);
 int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
-                              hwaddr iova, ram_addr_t size);
+                              hwaddr iova, uint64_t size);
 bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
                                      uint32_t *type, void *data, uint32_t len,
                                      uint64_t *caps, Error **errp);