[Qemu-devel] [PATCH v5 03/11] fw_cfg_mem: max access size and region size are the same for data register

[Laszlo Ersek]

Make it clear that the maximum access size to the MMIO data register
determines the full size of the memory region.

Currently the max access size is 1.

This patch doesn't change behavior.

Signed-off-by: Laszlo Ersek <address@hidden>
---

Notes:
    v5:
    - Remove the "fw_cfg_data_mem_ops.impl.max_access_size = 1"
      initialization, because we won't ask the memory subsystem to split
      accesses for us. [Paolo, Peter]
    
    v4:
    - unchanged
    
    v3:
    - new in v3 [Drew Jones]

 hw/nvram/fw_cfg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index 880311c..5b4d9d4 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -30,9 +30,8 @@
 #include "qemu/error-report.h"
 #include "qemu/config-file.h"
 
 #define FW_CFG_SIZE 2
-#define FW_CFG_DATA_SIZE 1
 #define FW_CFG_NAME "fw_cfg"
 #define FW_CFG_PATH "/machine/" FW_CFG_NAME
 
 #define TYPE_FW_CFG     "fw_cfg"
@@ -701,9 +700,10 @@ static void fw_cfg_mem_realize(DeviceState *dev, Error 
**errp)
     sysbus_init_mmio(sbd, &s->ctl_iomem);
     sysbus_mmio_map(sbd, 0, s->ctl_addr);
 
     memory_region_init_io(&s->data_iomem, OBJECT(s), &fw_cfg_data_mem_ops,
-                          FW_CFG(s), "fwcfg.data", FW_CFG_DATA_SIZE);
+                          FW_CFG(s), "fwcfg.data",
+                          fw_cfg_data_mem_ops.valid.max_access_size);
     sysbus_init_mmio(sbd, &s->data_iomem);
     sysbus_mmio_map(sbd, 1, s->data_addr);
 }
 
-- 
1.8.3.1