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suport device driver initialization model 

According to PnP specification, Appendix B, Option ROMs
that support DDIM (device driver initialization model) should
have their memory space writeable.

KVM deviates from us here, by removing the IO_MEM_ROM flag,
to allow for PCI option ROMs (they require DDIM). However,
there's absolutely no reason we can't do the same.

Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Glauber Costa 2009-04-23 15:20:55 -04:00 committed by Anthony Liguori
parent 8b91408b62
commit 49669fc551
1 changed files with 1 additions and 2 deletions
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3
hw/pc.c
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@ -920,8 +920,7 @@ static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
option_rom_offset = qemu_ram_alloc(0x20000);
oprom_area_size = 0;
cpu_register_physical_memory(0xc0000, 0x20000,
option_rom_offset | IO_MEM_ROM);
cpu_register_physical_memory(0xc0000, 0x20000, option_rom_offset);
if (using_vga) {
/* VGA BIOS load */