[Qemu-devel] [PATCH v2 3/5] Qemu: do not mark bios readonly

[Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>]

In isapc, no i440x device exists in guest that means seabios can not
make 0xc0000 to 0x1000000 writable

It works fine in current code since the guest can happily write readonly
memory. In order to support readonly slot in Qemu, we do not make the bios
readonly anymore

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
---
 hw/pc_sysfw.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/hw/pc_sysfw.c b/hw/pc_sysfw.c
index b45f0ac..2d56fc7 100644
--- a/hw/pc_sysfw.c
+++ b/hw/pc_sysfw.c
@@ -156,7 +156,6 @@ static void old_pc_system_rom_init(MemoryRegion *rom_memory)
     bios = g_malloc(sizeof(*bios));
     memory_region_init_ram(bios, "pc.bios", bios_size);
     vmstate_register_ram_global(bios);
-    memory_region_set_readonly(bios, true);
     ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1);
     if (ret != 0) {
     bios_error:
@@ -179,7 +178,6 @@ static void old_pc_system_rom_init(MemoryRegion *rom_memory)
                                         0x100000 - isa_bios_size,
                                         isa_bios,
                                         1);
-    memory_region_set_readonly(isa_bios, true);

     /* map all the bios at the top of memory */
     memory_region_add_subregion(rom_memory,
-- 
1.7.7.6