Re: [Qemu-devel] [PATCH 3/6] fw_cfg: move setting of FW_CFG_ID into fw_cfg_init1()

[Philippe Mathieu-Daudé]

On 06/10/2017 09:30 AM, Mark Cave-Ayland wrote:

The dma_enabled property enables us to set the FW_CFG_ID version
accordingly.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayl...@ilande.co.uk>

Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org>

---
 hw/nvram/fw_cfg.c |   16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index 1313bfd..f7b78a9 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -914,12 +914,19 @@ static void fw_cfg_init1(DeviceState *dev)
 {
     FWCfgState *s = FW_CFG(dev);
     MachineState *machine = MACHINE(qdev_get_machine());
+    uint32_t version = FW_CFG_VERSION;

     assert(!object_resolve_path(FW_CFG_PATH, NULL));

     object_property_add_child(OBJECT(machine), FW_CFG_NAME, OBJECT(s), NULL);

     fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (char *)"QEMU", 4);
+
+    if (s->dma_enabled) {
+        version |= FW_CFG_VERSION_DMA;
+    }
+
+    fw_cfg_add_i32(s, FW_CFG_ID, version);
     fw_cfg_add_bytes(s, FW_CFG_UUID, &qemu_uuid, 16);
     fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)!machine->enable_graphics);
     fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
@@ -935,7 +942,6 @@ FWCfgState *fw_cfg_init_io_dma(uint32_t iobase, uint32_t 
dma_iobase,
 {
     DeviceState *dev;
     FWCfgState *s;
-    uint32_t version = FW_CFG_VERSION;
     bool dma_requested = dma_iobase && dma_as;

     dev = qdev_create(NULL, TYPE_FW_CFG_IO);
@@ -954,12 +960,8 @@ FWCfgState *fw_cfg_init_io_dma(uint32_t iobase, uint32_t 
dma_iobase,
         /* 64 bits for the address field */
         s->dma_as = dma_as;
         s->dma_addr = 0;
-
-        version |= FW_CFG_VERSION_DMA;
     }

-    fw_cfg_add_i32(s, FW_CFG_ID, version);
-
     return s;
 }

@@ -975,7 +977,6 @@ FWCfgState *fw_cfg_init_mem_wide(hwaddr ctl_addr,
     DeviceState *dev;
     SysBusDevice *sbd;
     FWCfgState *s;
-    uint32_t version = FW_CFG_VERSION;
     bool dma_requested = dma_addr && dma_as;

     dev = qdev_create(NULL, TYPE_FW_CFG_MEM);
@@ -997,11 +998,8 @@ FWCfgState *fw_cfg_init_mem_wide(hwaddr ctl_addr,
         s->dma_as = dma_as;
         s->dma_addr = 0;
         sysbus_mmio_map(sbd, 2, dma_addr);
-        version |= FW_CFG_VERSION_DMA;
     }

-    fw_cfg_add_i32(s, FW_CFG_ID, version);
-
     return s;
 }