[libvirt PATCH 0/4] qemu: replace -device sga with -M graphics=off

[Richard W.M. Jones]

On Thu, Sep 09, 2021 at 12:25:12PM +0100, Daniel P. Berrangé wrote:
> SeaBIOS >= 1.11 / QEMU  >= 2.11 no longer requires the 'sga'
> device for serial console output from the BIOS. It can be
> done directly with graphics=off machine option.
> 
> This appears to be live migration compatible, despite
> changing the number of option ROMS loaded, though I need a
> little more testing to fully confirm this.
> 
> Daniel P. Berrangé (4):
>   qemu: prevent use of <bios useserial='yes'> on non-x86 arches
>   qemu: tweak error message to be more general purpose
>   qemu: switch to use -M graphics=off instead of -device sga
>   qemu: stop probing for '-device sga' support
> 
>  src/qemu/qemu_capabilities.c                  |  3 +--
>  src/qemu/qemu_capabilities.h                  |  2 +-
>  src/qemu/qemu_command.c                       | 25 ++++++++-----------
>  src/qemu/qemu_validate.c                      | 15 ++++++++---
>  .../caps_2.11.0.x86_64.xml                    |  1 -
>  .../caps_2.12.0.x86_64.xml                    |  1 -
>  .../caps_3.0.0.x86_64.xml                     |  1 -
>  .../caps_3.1.0.x86_64.xml                     |  1 -
>  .../caps_4.0.0.x86_64.xml                     |  1 -
>  .../caps_4.1.0.x86_64.xml                     |  1 -
>  .../caps_4.2.0.x86_64.xml                     |  1 -
>  .../caps_5.0.0.x86_64.xml                     |  1 -
>  .../caps_5.1.0.x86_64.xml                     |  1 -
>  .../caps_5.2.0.x86_64.xml                     |  1 -
>  .../caps_6.0.0.x86_64.xml                     |  1 -
>  .../caps_6.1.0.x86_64.xml                     |  1 -
>  tests/qemuxml2argvdata/bios.args              |  3 +--
>  tests/qemuxml2argvtest.c                      |  3 +--
>  18 files changed, 25 insertions(+), 38 deletions(-)

I didn't test it, but the changes look reasonable so:

Reviewed-by: Richard W.M. Jones <rjones at redhat.com>

Equivalent (non-)change to libguestfs is:

https://github.com/libguestfs/libguestfs/commit/e14ff937422115e23094ca4cce80ec9fb01c10b3

Rich.

-- 
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