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Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to p
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2 |
Date: |
Thu, 13 Jul 2017 03:47:01 +0300 |
On Thu, Jul 13, 2017 at 02:30:06AM +0200, Laszlo Ersek wrote:
> On 07/12/17 10:22, Thomas Huth wrote:
> > We don't want to carry along old machine types forever. If we are able to
> > remove the pc machines up to 0.13 one day for example, this would allow
> > us to eventually kill the code for rombar=0 (i.e. where QEMU copies ROM
> > BARs directly to low memory). Everything up to pc-1.2 is also known to
> > have issues with migration. So let's start with a deprecation message
> > for the old machine types so that the (hopefully) few users of these old
> > systems start switching over to newer machine types instead.
> >
> > Signed-off-by: Thomas Huth <address@hidden>
> > ---
> > Note: Even if we mark all these old machines as deprecated, this ofcourse
> > doesn't mean that we also have to remove them all at once later when we
> > decide to finally really remove some. We could then also start by removing
> > 0.10 and 0.11 only, for example (since there should really be no users left
> > for these), or only up to 0.13 (to be able to kill rombar=0).
>
> On a tangent: "rombar=0" shouldn't be killed before the libvirt domain
> XML regains the ability to say, "don't load any oprom for this device".
> Please see <https://bugzilla.redhat.com/show_bug.cgi?id=1425058>.
>
> (Please note that it is not lost on me that rombar=0 is a poor
> substitute for romfile='', but currently rombar=0 is the only fallback
> through libvirt. See the BZ pls.)
>
> Thanks
> Laszlo
rombar=0 would start meaning "no ROM", not "no BAR but still add a
rom".
- Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2, (continued)
- Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2, Thomas Huth, 2017/07/12
- Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2, Paolo Bonzini, 2017/07/12
- Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2, Daniel P. Berrange, 2017/07/12
- Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2, Eduardo Habkost, 2017/07/12
- Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2, Michael S. Tsirkin, 2017/07/13
Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2, Eduardo Habkost, 2017/07/12
Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2, Laszlo Ersek, 2017/07/12
- Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2,
Michael S. Tsirkin <=
Re: [Qemu-devel] [PATCH v3] hw/i386: Deprecate the machines pc-0.10 to pc-1.2, Michael S. Tsirkin, 2017/07/12