Re: [Qemu-devel] [PATCH v8 0/2] PC system flash support

[Jordan Justen]

On Mon, Nov 28, 2011 at 02:28, Avi Kivity <address@hidden> wrote:
> On 11/28/2011 04:26 AM, Jordan Justen wrote:
>> Enable flash emulation in a PC system using pflash_cfi01.
>
> The new memory layout should be made conditional on the machine type (-M
> pc-1.1 or later) to allow migration from/to pc-1.0 and earlier.
>
> Memory layout in this context are the names of memory ranges given to
> memory_region_init_ram(), sizes, and locations.  Also, the flash
> interface should not be there for older machines.

Is this the right way to go about it?
1. Create a new pc-sysfw qdev
2. Use a flash property in pc_piix.c to selectively enable the flash

Or, is there an easier or better way to say pc > pc-1.0?

How do I enable "migration from/to pc-1.0 and earlier"?  It seems like
some code will need to shuttle the data (rom <=> pflash).  Can you
point me an an example?

Thanks,

-Jordan