Re: [Qemu-devel] [PATCH] i386: remove the 'INTEL_PT' CPUID bit from named CPU models

[Robert Hoo <robert.hu@linux.intel.com>]

On Sat, 2018-12-22 at 10:13 +0100, Paolo Bonzini wrote:
> On 22/12/18 02:01, Robert Hoo wrote:
> > On Fri, 2018-12-21 at 16:27 +0100, Paolo Bonzini wrote:
> > > On 21/12/18 16:22, Philippe Mathieu-Daudé wrote:
> > > > Hi Paolo,
> > > > 
> > > > On 12/21/18 7:30 AM, Paolo Bonzini wrote:
> > > > > From: Robert Hoo <robert.hu@linux.intel.com>
> > > > > 
> > > > > Processor tracing is not yet implemented for KVM and it will
> > > > > be
> > > > > an
> > > > > opt in feature requiring a special module parameter.
> > > > > Disable it, because it is wrong to enable it by default and
> > > > > it is impossible that no one has ever used it.
> > > > > 
> > > > > Cc: qemu-stable@nongnu.org
> > > > 
> > > > Does this patch misses Robert S-o-b?
> > > > Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
> > 
> > Paolo's right. It didn't come from me.
> > > 
> > > No, the author is wrong, it should be me.  "git commit -c"
> > > apparently
> > > copies the author from the original commit.
> > > 
> > > Paolo
> > 
> > Hi Paolo, would you hold on INTEL_PT removal for a moment? I think
> > I
> > need Luwei's double confirm.
> 
> I'm aware of Luwei's patches, they will be in 4.21.  As mentioned in
> the
> commit message, they will be an opt-in feature, not enabled by
> default;
> the default is system-wide tracing and no INTEL_PT CPUID bit
> available
> in the guest.
> 
OK, synced with Luwei, agree with you.

> Paolo