[RFC PATCH v2 105/137] hw/remote: Give memory regions an explicit owner

remote_machine_init() passes OBJECT(machine). remote_sysmem_reconfig()
runs in the multi-process remote and creates system-memory subregions
on behalf of the machine; use qdev_get_machine() as owner.
dma_register() in the vfio-user server creates DMA windows for a
VfuObject; use it as owner.

No functional change intended.

RAMBlock idstrs are unchanged: the owners added here are Machine
or SysBus devices, and memory_region_register_ram() maps both to
dev=NULL for qemu_ram_set_idstr().

AI-used-for: code (refactoring)
Signed-off-by: Alexander Graf <[email protected]>
---
 hw/remote/machine.c       | 2 +-
 hw/remote/memory.c        | 3 ++-
 hw/remote/vfio-user-obj.c | 2 +-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/hw/remote/machine.c b/hw/remote/machine.c
index e8e9cf259f..09154fa122 100644
--- a/hw/remote/machine.c
+++ b/hw/remote/machine.c
@@ -37,7 +37,7 @@ static void remote_machine_init(MachineState *machine)
     system_io = get_system_io();
 
     pci_memory = g_new(MemoryRegion, 1);
-    memory_region_init(pci_memory, NULL, "pci", UINT64_MAX);
+    memory_region_init(pci_memory, OBJECT(machine), "pci", UINT64_MAX);
 
     rem_host = REMOTE_PCIHOST(qdev_new(OBJECT(s), "remote-pcihost",
                                        TYPE_REMOTE_PCIHOST));
diff --git a/hw/remote/memory.c b/hw/remote/memory.c
index 8195aa5fb8..3f8fe54bac 100644
--- a/hw/remote/memory.c
+++ b/hw/remote/memory.c
@@ -12,6 +12,7 @@
 
 #include "hw/remote/memory.h"
 #include "qapi/error.h"
+#include "hw/core/qdev.h"
 
 static void remote_sysmem_reset(void)
 {
@@ -42,7 +43,7 @@ void remote_sysmem_reconfig(MPQemuMsg *msg, Error **errp)
     for (region = 0; region < msg->num_fds; region++, suffix++) {
         g_autofree char *name = g_strdup_printf("remote-mem-%u", suffix);
         subregion = g_new(MemoryRegion, 1);
-        memory_region_init_ram_from_fd(subregion, NULL,
+        memory_region_init_ram_from_fd(subregion, qdev_get_machine(),
                                        name, sysmem_info->sizes[region],
                                        RAM_SHARED, msg->fds[region],
                                        sysmem_info->offsets[region],
diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c
index 87fa7b6572..685d4c2baf 100644
--- a/hw/remote/vfio-user-obj.c
+++ b/hw/remote/vfio-user-obj.c
@@ -324,7 +324,7 @@ static void dma_register(vfu_ctx_t *vfu_ctx, vfu_dma_info_t *info)
 
     subregion = g_new0(MemoryRegion, 1);
 
-    memory_region_init_ram_ptr(subregion, NULL, name,
+    memory_region_init_ram_ptr(subregion, OBJECT(o), name,
                                iov->iov_len, info->vaddr);
 
     dma_as = pci_device_iommu_address_space(o->pci_dev);
-- 
2.47.1