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From: "Daniel P. Berrangé" <berrange@redhat.com>
To: Markus Armbruster <armbru@redhat.com>
Cc: "Kevin Wolf" <kwolf@redhat.com>,
	"Peter Maydell" <peter.maydell@linaro.org>,
	"Eduardo Habkost" <ehabkost@redhat.com>,
	"Jason Wang" <jasowang@redhat.com>,
	qemu-devel@nongnu.org, "Max Reitz" <mreitz@redhat.com>,
	"Marc-André Lureau" <marcandre.lureau@redhat.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>
Subject: Re: Failing property setters + hardwired devices + -global = a bad day
Date: Wed, 29 Apr 2020 16:57:19 +0100	[thread overview]
Message-ID: <20200429155719.GL1495129@redhat.com> (raw)
In-Reply-To: <87mu6uia5i.fsf@dusky.pond.sub.org>

On Wed, Apr 29, 2020 at 05:28:25PM +0200, Markus Armbruster wrote:
> Is there any sane use for configuring backends via any of the default
> mechanisms?
> 
> I'm aware of one, but it's outdated: -global isa-fdc.driveA=...  Use
> -device floppy instead.
> 
> I'd love to deprecate -global wholesale, but we can't as long as we
> don't have better means to configure onboard devices.  Can we deprecate
> its use with backend properties at least?

Currently libvirt has code using the following


* Floppy

  -global isa-fdc.driveA=ID
  -global isa-fdc.driveB=ID
  -global isa-fdc.bootindexA=NN
  -global isa-fdc.bootindexB=NN

  Only used when the machine type is pc-q35-2.4 or earlier

* NVRAM

  -global spapr-nvram.reg=0xnnnn

* Video primary display adapter

  -global qxl-vga.ram_size=NN
  -global qxl-vga.vram_size=NN
  -global qxl-vga.vram64_size=NN
  -global qxl-vga.vgamem_mb=NN
  -global qxl-vga.max_outputs=NN
  -global VGA.vgamem_mb=MM
  -global vmware-svga.vgamem_mb=MM

  Only used for old qemu lacking -device support where we must use -vga
  instead


* PIT policy

   -global kvm-pit.lost_tick_policy=XXX


* S3/S4

   -global PIIX4_PM.disable_s3=NNN
   -global PIIX4_PM.disable_s4=NNN
   -global ICH9-LPC.disable_s3=NNN
   -global ICH9-LPC.disable_s4=NNN

* PCI hole

   -global i440FX-pcihost.pci-hole64-size=NNN
   -global q35-pcihost.pci-hole64-size=NNN

* SMM TSeg

   -global mch.extended-tseg-mbytes=NNN

* pflash

   -global driver=cfi.pflash01,property=secure,value=on

  Used for EFI secure boot


I'm unclear which of these can be replaced with a different QEMU cli
option....

Regards,
Daniel
-- 
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  parent reply	other threads:[~2020-04-29 16:05 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-29 15:28 Failing property setters + hardwired devices + -global = a bad day Markus Armbruster
2020-04-29 15:39 ` Paolo Bonzini
2020-04-29 16:23   ` Eduardo Habkost
2020-04-29 15:57 ` Daniel P. Berrangé [this message]
2020-04-30  7:09   ` Markus Armbruster
2020-04-30  9:27     ` Peter Maydell
2020-04-30 10:03       ` Configuring onboard devices (was: Failing property setters + hardwired devices + -global = a bad day) Markus Armbruster
2020-04-30 10:29         ` Mark Cave-Ayland
2020-04-30 14:11           ` Configuring onboard devices Markus Armbruster
2020-04-30 14:32             ` Mark Cave-Ayland
2020-04-30 15:20               ` Markus Armbruster
2020-04-30 16:56                 ` Mark Cave-Ayland
2020-05-02  5:47                   ` Markus Armbruster
2020-05-03 22:13                     ` Mark Cave-Ayland
2020-05-04 16:30                       ` Eduardo Habkost
2020-04-30 10:34         ` Configuring onboard devices (was: Failing property setters + hardwired devices + -global = a bad day) Daniel P. Berrangé
2020-04-30 10:45           ` Peter Maydell
2020-04-30 10:53             ` Daniel P. Berrangé
2020-04-30 14:38               ` Configuring onboard devices Markus Armbruster
2020-04-30 10:54             ` Configuring onboard devices (was: Failing property setters + hardwired devices + -global = a bad day) Mark Cave-Ayland
2020-04-30 14:27           ` Configuring onboard devices Markus Armbruster

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