'valid' field in MemoryRegionOps struct indicates how the MemoryRegion
can be accessed by the guest. In the previous code, the 'valid' field
was not specified explicitly. As a result, the CMB area could only be
accessed in units of 4 bytes.

This commit specifies the 'valid' field in MemoryRegionOps of CMB and
the CMB area can be accessed in units of 8 bytes.

Signed-off-by: Tomoyuki HIROSE <tomoyuki.hirose@igel.co.jp>
---
 hw/nvme/ctrl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index 8e4612e035..acbd10628f 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -8166,6 +8166,11 @@ static const MemoryRegionOps nvme_cmb_ops = {
         .min_access_size = 1,
         .max_access_size = 8,
     },
+    .valid = {
+        .unaligned = true,
+        .min_access_size = 1,
+        .max_access_size = 8,
+    },
 };
 
 static bool nvme_check_params(NvmeCtrl *n, Error **errp)
-- 
2.43.0