Re: [Qemu-devel] [PATCH 4/7] move CPU models from cpus-x86_64.conf to C

[Igor Mammedov <imammedo@redhat.com>]

On Mon, 10 Sep 2012 14:18:38 +0200
Igor Mammedov <imammedo@redhat.com> wrote:

> On Wed,  5 Sep 2012 17:41:10 -0300
> Eduardo Habkost <ehabkost@redhat.com> wrote:
> 
> > Those models are maintained by QEMU and may require compatibility code
> > to be added when making some changes. Keeping the data in the C source
> > code should make it simpler to handle those details.
> > 
> > Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> > ---
> >  sysconfigs/target/cpus-x86_64.conf | 129 +---------------------
> >  target-i386/cpu.c                  | 219
> > +++++++++++++++++++++++++++++++++++++ 2 files changed, 220 insertions(+),
> > 128 deletions(-)
> > 
> > diff --git a/sysconfigs/target/cpus-x86_64.conf
> > b/sysconfigs/target/cpus-x86_64.conf index cee0ea9..3902189 100644
> > --- a/sysconfigs/target/cpus-x86_64.conf
> > +++ b/sysconfigs/target/cpus-x86_64.conf
> > @@ -1,128 +1 @@
> > -# x86 CPU MODELS
> > -
> > -[cpudef]
> > -   name = "Conroe"
> > -   level = "2"
> > -   vendor = "GenuineIntel"
> > -   family = "6"
> > -   model = "2"
> > -   stepping = "3"
> > -   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr
> > sep apic cx8 mce pae msr tsc pse de fpu"
> > -   feature_ecx = "ssse3 sse3"
> > -   extfeature_edx = "i64 xd syscall"
> ...
> > +        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_NX |
> > CPUID_EXT2_SYSCALL,
> Silent fix, replacing i64 with CPUID_EXT2_LM
> looks like "i64" is mistake and never worked. In Intel & AMD cpuid guides
Actually it works when setting feature fields because it uses
setfeatures(), however setting i64 will set wrong bit if it's set using
add_flagname_to_bitmaps()

> 01.EDX[30] is reserved and what was probably meant/intended here is to use
> 80000001h.EDX[29] /* CPUID_EXT2_LM */
> Perhaps patch that fixes it ought to go before this one.
>