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Re: [Qemu-devel] [PATCH v2 repost 6/9] loader: support for unmapped ROM
From: |
Laszlo Ersek |
Subject: |
Re: [Qemu-devel] [PATCH v2 repost 6/9] loader: support for unmapped ROM blobs |
Date: |
Mon, 15 Jul 2013 20:30:51 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130621 Thunderbird/17.0.7 |
On 07/15/13 18:03, Michael S. Tsirkin wrote:
> On Mon, Jul 15, 2013 at 03:22:33PM +0200, Laszlo Ersek wrote:
>> On 07/10/13 15:51, Michael S. Tsirkin wrote:
>>
>>> @@ -697,7 +703,12 @@ static void rom_reset(void *unused)
>>> if (rom->data == NULL) {
>>> continue;
>>> }
>>> - cpu_physical_memory_write_rom(rom->addr, rom->data, rom->datasize);
>>> + if (rom->mr) {
>>> + void *host = memory_region_get_ram_ptr(rom->mr);
>>> + memcpy(host, rom->data, rom->datasize);
>>> + } else {
>>> + cpu_physical_memory_write_rom(rom->addr, rom->data,
>>> rom->datasize);
>>> + }
>>> if (rom->isrom) {
>>> /* rom needs to be written only once */
>>> g_free(rom->data);
>>
>> Can you please explain the difference?
>>
>> Thanks
>> Laszlo
>
> Could you please clarify the question?
>
> If the ROM is not mapped into guest memory, it can't
> be accessed with cpu_physical_memory_write_rom.
Thanks, that's what I wanted to hear :)
Laszlo