[Qemu-devel] [PATCH v6 04/11] fw_cfg_mem: flip ctl_mem_ops and data_mem_ops to DEVICE_BIG_ENDIAN

[Paolo Bonzini <pbonzini@redhat.com>]

From: Laszlo Ersek <lersek@redhat.com>

The standalone selector port (fw_cfg_ctl_mem_ops) is only used by big
endian guests to date (*), hence this change doesn't regress them. Paolo
and Alex have suggested / requested an explicit DEVICE_BIG_ENDIAN setting
here, for clarity.

(*) git grep -l fw_cfg_init_mem

    hw/nvram/fw_cfg.c
    hw/ppc/mac_newworld.c
    hw/ppc/mac_oldworld.c
    hw/sparc/sun4m.c
    include/hw/nvram/fw_cfg.h

The standalone data port (fw_cfg_data_mem_ops) has max_access_size 1 (for
now), hence changing its endianness doesn't change behavior for existing
guest code.

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 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 8deb860..910ae14 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -332,14 +332,14 @@ static bool fw_cfg_comb_valid(void *opaque, hwaddr addr,
 
 static const MemoryRegionOps fw_cfg_ctl_mem_ops = {
     .write = fw_cfg_ctl_mem_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
+    .endianness = DEVICE_BIG_ENDIAN,
     .valid.accepts = fw_cfg_ctl_mem_valid,
 };
 
 static const MemoryRegionOps fw_cfg_data_mem_ops = {
     .read = fw_cfg_data_mem_read,
     .write = fw_cfg_data_mem_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
+    .endianness = DEVICE_BIG_ENDIAN,
     .valid = {
         .min_access_size = 1,
         .max_access_size = 1,
-- 
2.1.0