Re: [Qemu-devel] [PATCH v2 2/3] target-i386: turn off CPU.l3-cache only for 2.7 and older machine types

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, Sep 19, 2016 at 01:58:48PM -0300, Eduardo Habkost wrote:
> On Mon, Sep 19, 2016 at 10:32:34AM +0200, Igor Mammedov wrote:
> > commit (14c985cff target-i386: present virtual L3 cache info for vcpus)
> > misplaced compat property putting it in new 2.8 machine type
> > which would effectively to disable feature until 2.9 is released.
> > Intent of commit probably should be to disable feature for 2.7
> > and older while allowing not yet released 2.8 to have feature
> > enabled by default.
> > 
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> > Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
> > ---
> >  include/hw/i386/pc.h | 7 +++----
> >  1 file changed, 3 insertions(+), 4 deletions(-)
> > 
> > diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
> > index b0a61f3..29a6c9b 100644
> > --- a/include/hw/i386/pc.h
> > +++ b/include/hw/i386/pc.h
> > @@ -367,16 +367,15 @@ int e820_get_num_entries(void);
> >  bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
> >  
> >  #define PC_COMPAT_2_8 \
> 
> PC_COMPAT_2_8 isn't even used by any code (and shouldn't be used
> until we release QEMU 2.8). Let's just delete it by now?

it's unrelated to this patch though.

> > +
> > +#define PC_COMPAT_2_7 \
> > +    HW_COMPAT_2_7 \
> >      {\
> >          .driver   = TYPE_X86_CPU,\
> >          .property = "l3-cache",\
> >          .value    = "off",\
> >      },
> >  
> > -
> > -#define PC_COMPAT_2_7 \
> > -    HW_COMPAT_2_7
> > -
> >  #define PC_COMPAT_2_6 \
> >      HW_COMPAT_2_6 \
> >      {\
> > -- 
> > 2.7.4
> > 
> 
> -- 
> Eduardo