[QEMU PATCH 1/2] cxl-type3: Properly unmap the memory-backend on device exit

[Joshua Lant <joshualant@gmail.com>]

Currently the memory backend remains mapped, meaning that if the device owning
the backend is hot-removed, it cannot be readded in the same QEMU instance.

Fixes: 5fcc499ee34 ("mem/cxl_type3: Add read and write functions for associated hostmem.")

Signed-off-by: Joshua Lant <joshualant@gmail.com>
---
 hw/mem/cxl_type3.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c
index 4739239da3..105526edd4 100644
--- a/hw/mem/cxl_type3.c
+++ b/hw/mem/cxl_type3.c
@@ -1049,12 +1049,15 @@ err_free_special_ops:
     g_free(regs->special_ops);
     if (ct3d->dc.host_dc) {
         cxl_destroy_dc_regions(ct3d);
+        host_memory_backend_set_mapped(ct3d->dc.host_dc, false);
         address_space_destroy(&ct3d->dc.host_dc_as);
     }
     if (ct3d->hostpmem) {
+        host_memory_backend_set_mapped(ct3d->hostpmem, false);
         address_space_destroy(&ct3d->hostpmem_as);
     }
     if (ct3d->hostvmem) {
+        host_memory_backend_set_mapped(ct3d->hostvmem, false);
         address_space_destroy(&ct3d->hostvmem_as);
     }
 }
@@ -1072,12 +1075,15 @@ static void ct3_exit(PCIDevice *pci_dev)
     cxl_destroy_cci(&ct3d->cci);
     if (ct3d->dc.host_dc) {
         cxl_destroy_dc_regions(ct3d);
+        host_memory_backend_set_mapped(ct3d->dc.host_dc, false);
         address_space_destroy(&ct3d->dc.host_dc_as);
     }
     if (ct3d->hostpmem) {
+        host_memory_backend_set_mapped(ct3d->hostpmem, false);
         address_space_destroy(&ct3d->hostpmem_as);
     }
     if (ct3d->hostvmem) {
+        host_memory_backend_set_mapped(ct3d->hostvmem, false);
         address_space_destroy(&ct3d->hostvmem_as);
     }
 }
-- 
2.47.3