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Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resiz
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize |
Date: |
Wed, 19 Nov 2014 15:28:21 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 |
On 19/11/2014 15:26, Dr. David Alan Gilbert wrote:
> * Paolo Bonzini (address@hidden) wrote:
>>
>>
>> On 19/11/2014 15:13, Dr. David Alan Gilbert wrote:
>>> Since we've wondered off the actual ACPI table stuff into general
>>> ROM sizing, I'd like to propose some concrete fixes:
>>>
>>> 1) We explicitly name the bios file in a .romfile attribute for
>>> all ROMs.
>>> 2) The code that uses .romfile has an expansion for $MACHINETYPE
>>> 3) We actually symlink all of those together, anyone who wants/has
>>> to deal with different versions can downstream.
>>> 4) The machine types contain size attributes for the ROMs that
>>> are generoously larger than the ROMs anyone currently uses.
>>>
>>> I think 1..3 should deal with those of us who have to deal with different
>>> ROM versions on different machine types.
>>
>> It should, but it's a solution in search of a problem.
>
> Well we already do something close to 1 & 2 downstream but more ad-hoc;
> it's just a generalisation (and 4 from padding the size of our images).
> So we already had that problem.
Upstream too. See pxe-* vs. efi-* NIC option ROMs. The latter includes
both PXE firmware for BIOS and EFI drivers. We keep two copies because
they have different sizes. Having explicit expansions for $MACHINETYPE
would be hugely overkill, in my opinion.
Paolo
>>
>>> 4 might be good enough for the ACPI tables if you can bound it.
>>
>> Already doing that (rounding to 128k, warning if >64k), but it is not a
>> definitive solution.
>>
>> We also do (4) for ROMs, since VGA BIOSes use only 36k out of 64k and
>> iPXE ROMs use only ~200k out of 256k.
>>
>> Paolo
> --
> Dr. David Alan Gilbert / address@hidden / Manchester, UK
>
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, (continued)
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Michael S. Tsirkin, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Juan Quintela, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Michael S. Tsirkin, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Juan Quintela, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Michael S. Tsirkin, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Paolo Bonzini, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Juan Quintela, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Dr. David Alan Gilbert, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Paolo Bonzini, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Dr. David Alan Gilbert, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Dr. David Alan Gilbert, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Michael S. Tsirkin, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Dr. David Alan Gilbert, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Juan Quintela, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Paolo Bonzini, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Juan Quintela, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Paolo Bonzini, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Kevin O'Connor, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Paolo Bonzini, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Gerd Hoffmann, 2014/11/20