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Re: [Qemu-devel] [PATCH] target-i386: Enable "check" mode by default
From: |
Eduardo Habkost |
Subject: |
Re: [Qemu-devel] [PATCH] target-i386: Enable "check" mode by default |
Date: |
Mon, 31 Aug 2015 11:48:44 -0300 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Mon, Aug 31, 2015 at 02:20:54PM +0200, Igor Mammedov wrote:
> On Wed, 26 Aug 2015 13:50:25 -0300
> Eduardo Habkost <address@hidden> wrote:
> > Current default behavior of QEMU is to silently disable features that
> > are not supported by the host when a CPU model is requested in the
> > command-line. This means that in addition to risking breaking guest ABI
> > by default, we are silent about it.
> >
> > I would like to enable "enforce" by default, but this can easily break
> > existing production systems because of the way libvirt makes assumptions
> > about CPU models today (this will change in the future, once QEMU
> > provide a proper interface for checking if a CPU model is runnable).
> >
> > But there's no reason we should be silent about it. So, change
> > target-i386 to enable "check" mode by default so at least we have some
> > warning printed to stderr (and hopefully logged somewhere) when QEMU
> > disables a feature that is not supported by the host system.
> >
> > Signed-off-by: Eduardo Habkost <address@hidden>
[...]
> Reviewed-by: Igor Mammedov <address@hidden>
Thanks! Applied to x86 tree.
--
Eduardo