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Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resiz
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize |
Date: |
Wed, 19 Nov 2014 14:59:12 +0000 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
* Paolo Bonzini (address@hidden) wrote:
>
>
> 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.
Yes it is, but it's simple and feels easy to understand.
Dave
>
> 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
> >
--
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, 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, 2014/11/19
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize,
Dr. David Alan Gilbert <=
- 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
- Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize, Paolo Bonzini, 2014/11/20