Re: [Qemu-devel] [PATCH 0/5] Add qemu_vga.ndrv MacOS PPC VGA driver from QemuMacDrivers

[David Gibson <david@gibson.dropbear.id.au>]

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On Mon, May 01, 2017 at 02:43:29PM +0100, Mark Cave-Ayland wrote:
> Last year Ben posted an initial set of patches for OpenBIOS which provided a
> MacOS PPC VGA driver enabling MacOS guests to control the colour depth and
> resolution of the QEMU stdvga device. The QemuMacDrivers repository was set up on
> qemu-project.org [1] but due to personal circumstances in the second half of last
> year, I was unable to spend much time on it.
> 
> Over the last few months I've reworked the OpenBIOS patches and applied all the
> required dependencies upstream which makes it possible to enable the driver with
> a fairly simple patch [2] to OpenBIOS's vga.fs (binary provided for testing, but not
> to be included in the final merge).
> 
> The main change I've made is that instead of serving the driver binary directly
> through the VGA PCI BAR (with the relevant binary inlined within OpenBIOS), the
> driver is now hosted by QEMU and is installed via the fw_cfg interface by the
> OpenBIOS vga.fs driver during startup. Not only does this make it possible to
> further develop the driver without also having to rebuild OpenBIOS every time but
> it also leaves us with the ability to serve a proper IEEE-1275 FCode ROM via the
> VGA PCI BAR later if needed.
> 
> In addition to this I've added a new OpenBIOS NVRAM variable "vga-ndrv?" which
> defaults to "true" but can be overidden via -prom-env to force disable the
> driver if any incompatibilities are found. I've tested it locally against my
> OS X 10.2 and MacOS 9.2.1 images and it seems to work there, but as I don't
> have an exhaustive set of MacOS images available I'd be grateful for some more
> testing.
> 
> [1] https://lists.gnu.org/archive/html/qemu-devel/2016-07/msg06159.html
> [2] https://mail.coreboot.org/pipermail/openbios/2017-May/009909.html
> 
> This patchset can also be found on my github repository at
> https://github.com/mcayland/qemu/tree/ppc-vga-upstream.
> 
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

Applied to ppc-for-2.10, thanks.


> 
> 
> Mark Cave-Ayland (5):
>   Add QemuMacDrivers as submodule
>   Add QemuMacDrivers qemu_vga.ndrv revision d4e7d7a built as submodule
>   ppc: add qemu_vga.ndrv ROM to fw_cfg interface for OldWorld Macs
>   ppc: add qemu_vga.ndrv ROM to fw_cfg interface for NewWorld Macs
>   [Testing] Provide NDRV-capable openbios-ppc binary for testing
> 
>  .gitmodules           |    3 +++
>  Makefile              |    3 ++-
>  hw/ppc/mac_newworld.c |   18 +++++++++++++++++-
>  hw/ppc/mac_oldworld.c |   18 +++++++++++++++++-
>  pc-bios/README        |    3 +++
>  pc-bios/openbios-ppc  |  Bin 750840 -> 754936 bytes
>  pc-bios/qemu_vga.ndrv |  Bin 0 -> 14752 bytes
>  roms/QemuMacDrivers   |    1 +
>  8 files changed, 43 insertions(+), 3 deletions(-)
>  create mode 100644 pc-bios/qemu_vga.ndrv
>  create mode 160000 roms/QemuMacDrivers
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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