On Sat, Jun 04, 2016 at 12:34:39PM +0200, Boris Petkov wrote:
> Haozhong Zhang <haozhong.zhang@xxxxxxxxx> wrote:
>
> >This patch adds the support to inject SRAR and SRAO as LMCE, i.e. they
> >will be injected to only one VCPU rather than broadcast to all
> >VCPUs. As KVM reports LMCE support on Intel platforms, this features is
> >only available on Intel platforms.
> >
> >Signed-off-by: Ashok Raj <ashok.raj@xxxxxxxxx>
> >Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
> >---
> >Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> >Cc: Richard Henderson <rth@xxxxxxxxxxx>
> >Cc: Eduardo Habkost <ehabkost@xxxxxxxxxx>
> >Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
> >Cc: Boris Petkov <bp@xxxxxxx>
> >Cc: kvm@xxxxxxxxxxxxxxx
> >Cc: Tony Luck <tony.luck@xxxxxxxxx>
> >Cc: Andi Kleen <andi.kleen@xxxxxxxxx>
> >---
> > target-i386/cpu.c | 26 ++++++++++++++++++++++++++
> > target-i386/cpu.h | 13 ++++++++++++-
> > target-i386/kvm.c | 35 +++++++++++++++++++++++++++++++----
> > 3 files changed, 69 insertions(+), 5 deletions(-)
>
> ...
>
> >@@ -1173,6 +1182,8 @@ struct X86CPU {
> > */
> > bool enable_pmu;
> >
> >+ bool enable_lmce;
>
> That struct would go fat pretty fast if it grows a bool per CPU
> feature. Perhaps a more clever, a-bit-per-featurebit scheme
> would be in order.
We already have X86CPU.features, but it's specific for feature
flags appearing on CPUID. We can eventually extend
FeatureWord/FeatureWordInfo/x86_cpu_get_supported_feature_word()
to represent features that don't appear directly on CPUID.
--
Eduardo
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