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Re: [Qemu-devel] [PATCH v2 2/3] target-i386: turn off CPU.l3-cache only
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH v2 2/3] target-i386: turn off CPU.l3-cache only for 2.7 and older machine types |
Date: |
Tue, 20 Sep 2016 02:41:34 +0300 |
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 <address@hidden>
> > Reviewed-by: Marcel Apfelbaum <address@hidden>
> > ---
> > 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