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


From: Howard Spoelstra
Subject: Re: [Qemu-ppc] [PATCH 0/5] Add qemu_vga.ndrv MacOS PPC VGA driver from QemuMacDrivers
Date: Tue, 2 May 2017 17:52:35 +0200

Hi,

I successfully tested this patch set with a build for OSX.
Installed versions of Mac OS 9.04, 9.1, 9.22, 10.0, 10.1, 10.2, 10.3
and 10.4 all work. As do three images pulled from running systems with
10.2, 10.3, 10.4 installed, including classic.

Best,
Howard

On Mon, May 1, 2017 at 3:43 PM, Mark Cave-Ayland
<address@hidden> 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 <address@hidden>
>
>
> 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
>
> --
> 1.7.10.4
>
>



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