[Qemu-devel] [PATCH] memory: make ram device read/write endian sensitive

[Yongji Xie]

At the moment ram device's memory regions are NATIVE_ENDIAN. This does
not work on PPC64 because VFIO PCI device is little endian but PPC64
always defines static macro TARGET_WORDS_BIGENDIAN.

This fixes endianness for ram device the same way as it is done
for VFIO region in commit 6758008e2c4e79fb6bd04fe8e7a41665fa583965.

Signed-off-by: Yongji Xie <address@hidden>
---
 memory.c |   14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/memory.c b/memory.c
index 6c58373..1ccb99f 100644
--- a/memory.c
+++ b/memory.c
@@ -1139,13 +1139,13 @@ static uint64_t memory_region_ram_device_read(void 
*opaque,
         data = *(uint8_t *)(mr->ram_block->host + addr);
         break;
     case 2:
-        data = *(uint16_t *)(mr->ram_block->host + addr);
+        data = le16_to_cpu(*(uint16_t *)(mr->ram_block->host + addr));
         break;
     case 4:
-        data = *(uint32_t *)(mr->ram_block->host + addr);
+        data = le32_to_cpu(*(uint32_t *)(mr->ram_block->host + addr));
         break;
     case 8:
-        data = *(uint64_t *)(mr->ram_block->host + addr);
+        data = le64_to_cpu(*(uint64_t *)(mr->ram_block->host + addr));
         break;
     }
 
@@ -1166,13 +1166,13 @@ static void memory_region_ram_device_write(void 
*opaque, hwaddr addr,
         *(uint8_t *)(mr->ram_block->host + addr) = (uint8_t)data;
         break;
     case 2:
-        *(uint16_t *)(mr->ram_block->host + addr) = (uint16_t)data;
+        *(uint16_t *)(mr->ram_block->host + addr) = 
cpu_to_le16((uint16_t)data);
         break;
     case 4:
-        *(uint32_t *)(mr->ram_block->host + addr) = (uint32_t)data;
+        *(uint32_t *)(mr->ram_block->host + addr) = 
cpu_to_le32((uint32_t)data);
         break;
     case 8:
-        *(uint64_t *)(mr->ram_block->host + addr) = data;
+        *(uint64_t *)(mr->ram_block->host + addr) = cpu_to_le64(data);
         break;
     }
 }
@@ -1180,7 +1180,7 @@ static void memory_region_ram_device_write(void *opaque, 
hwaddr addr,
 static const MemoryRegionOps ram_device_mem_ops = {
     .read = memory_region_ram_device_read,
     .write = memory_region_ram_device_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
+    .endianness = DEVICE_LITTLE_ENDIAN,
     .valid = {
         .min_access_size = 1,
         .max_access_size = 8,
-- 
1.7.1